farah diyana ariffin, azhar abdul halim, marlia mohd hanafiah, normah awang & mohd sham othman.  (2023).  cytotoxic assessment of african catfish (clarias gariepinus) pond farm effluent.  - buletin sk.  1-6. 

lee loong chuen;azhar bin abdul halim;hukil bin sino.  (2023).  pembangunan pendekatan pemprofilan novel dengan teknik kromatografi cecair berprestasi-ultra (uplc) dan teknik kemometrik untuk analisis forensik tanah.  - .  . 

fawaz al-badaii, azhar abdul halim, amal alsharabi, ebtesam altiby, entsar naji, kholod mahdi, mona hujerh, nabilah alshawkani, rehab alshamy, walid alsayouri.  (2023).  green synthesis of zno nanoparticles using nigella sativa seeds aqueous extract and antibacterial activity evaluation.  - international journal of scientific research in biological sciences.  18-24. 

fawaz al badaii, riyadh abdulmalek hassan, nurul ain abdul jalil, azhar abdul halim.  (2023).  adsorptive removal of boron from aqueous solutions using peels of jering seeds (archidendron pauciflorum): isotherm, kinetic and thermodynamic studies.  - desalination and water treatment.  139-157. 

amir detho, zawawi daud, abdulaziz ibrahim almohan, sattam fahad almojil, abdulrhman fahmi alali, asif ali memon, saleem raza samo, mohd arif roslid, halizah awang, mohd baharudin ridzuan, mohamad anuar kamaruddin, azhar abdul halim.  (2022).  adsorption efficiency and isotherm of cod and nh3 removal from stabilized leachate using natural low-cost adsorbent green mussel (perna viridis).  - desalination and water treatment.  191-201. 

azhar abdul halim, marlia mohd hanafiah, farah diyana ariffin, hajah nor aidah nordin, kumutha ap krishnamoorthy.  (2022).  fitoremediasi - kssm biologi tingkatan 5.  - .  46. 

loong chuen lee, hukil sino, nor azman mohd noor, saiful mohd ali, azhar abdul halim.  (2022).  prediction of the geographical origin of soils using ultra-performance liquid chromatography (uplc) fingerprinting and k-nearest neighbor (k-nn).  - proceedings of 2nd international conference on artificial intelligence: advances and applications.  47-56. 

loong chuen lee, hukil sino, abdul halim azhar, norazman bin mohd noor, saiful fazamil bin mohd ali.  (2022).  predicting source of brown soils from proximity locations using random forests for forensic investigation.  - the 12th international fundamental science congress 2021 (ifsc 2021).  2-5. 

loong chuen lee, ameeta a/p nai eyan, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  discrimination of brown soils using ultra-performance liquid chromatography (uplc) and principal component analysis.  - acs spring 2021.  1-10. 

loong chuen lee, nadirah abd hamid, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  assessment of column-wise manipulations on uplc chromatograms of red soils.  - 4th analytical chemistry and separation sciences virtual event.  1. 

loong chuen lee, muhamad adib ahmad, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  comparing baseline correction algorithms in discriminating five brown soils.  - 4th analytical chemistry and separation sciences virtual event.  1. 

loong chuen lee, yaishnavee ravi, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  performances of derivative algorithms in uplc chromatograms of red soils.  - 4th analytical chemistry and separation sciences virtual event.  1. 

loong chuen lee, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  ultra-performance liquid chromatography (uplc) method for forensic soil profiling.  - tokyo international conference.  7. 

loong chuen lee, hukil sino, nor azman mohd noor, saiful mohd ali, azhar abdul halim.  (2021).  predicting source of brown soils from proximity locations using random forests for forensic investigation.  - 12th international fundamental science congress (ifsc) 2021.  1-12. 

nurul umairah m. nizam, marlia m. hanafiah, ebrahim mahmoudi, azhar a. halim, abdul wahab mohammad.  (2021).  the removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon.  - scientific reports.  1-17. 

amir detho, zawawi dauda, mohd arif rosli, mohd baharudin bin ridzuan, halizah awang, mohamad anuar kamaruddin, husnul azan bin tajarudin, azhar abdul halim.  (2021).  cod and ammoniacal nitrogen reduction from stabilized landfill leachate using carbon mineral composite adsorbent.  - desalination and water treatment.  143-151. 

sarah nadira hurairah, azhar abdul halim, nurhazirah abdul aziz.  (2021).  stabilized leachate treatment by using a combination of struvite precipitation and coagulation-flocculation methods: rsm optimization.  - international conference on civil and environmental engineering.  1-13. 

n abdul harris, a abdul halim.  (2021).  microbial fuel cells constructed from the integration of anaerobic and aerobic sanitary landfill site systems.  - 4th international conference on science and technology application in clime change 2021.  012-034. 

a.a. halim, m.m. hanafiah, m. asmi, z. daud.  (2021).  boron removal from aqueous solution using coagulationflocculation with curcumin : a response surface methodology.  - journal of environmental biology.  750-755. 

m.m. hanafiah, n.i.h.a. aziz, a.a. halim, l.s. shamdin, l.a.a. razzak.  (2021).  phytoremediation of landfill leachate using ipomoea aquatica and pistia stratiotes.  - journal of environmental biology.  775-781. 

marlia binti mohd hanafiah;mohd. ekhwan bin toriman;azhar bin abdul halim;othman bin jaafar.  (2021).  establishing water efficiency toolkit using water footprint as a key indicator to assess performance of water utilities: inculcating the concept of kampus lestari, ukm.  - .  . 

lee khai ern, mazlin mokhtar, marlia mohd hanafiah, azhar abdul halim.  (2021).  bahan kimia dalam kehidupan harian: adakah kita selamat?.  - .  19. 

loong chuen lee, hukil sino, nor azman mohd noor, saiful mohd ali and azhar abdul halim.  (2021).  prediction of the geographical origin of soils using ultra-performance liquid chromatography (uplc) fingerprinting and k-nearest neighbor (k-nn).  - 2nd international conference on artificial intelligence: advances and applications (icaiaa 2021).  1-12. 

loong chuen lee, norazwani ali, nor azman mohd noor, saiful fazamil mohd ali, hukil sino, azhar abdul halim.  (2021).  evaluation of row-wise manipulations on uplc chromatogram to enhance discrimination of red soils.  - 4th analytical chemistry and separation sciences virtual event.  1. 

zawawi daud, amir detho, mohd arif rosli, mahmoud hijab abubakar, kamran ahmed samo, nur faizan mohammad rais, azhar abdul halim, husnul azan tajarudin.  (2020).  ammoniacal nitrogen and cod removal from stabilized landfill leachate using granular activated carbon and green mussel (perna viridis) shell powder as a composite adsorbent.  - desalination and water treatment.  111-117. 

farah diyana binti ariffin;azhar bin abdul halim;normah bt. awang;mohd. sham bin othman;rogayah binti abu hassan @ mohamad;mazrura binti sahani;marlia binti mohd hanafiah;siti shahara binti zulfakar;muhammad ikram bin a wahab;chan kok meng;nur faizah bint.  (2020).  penilaian kitar hayat: rawatan air sisa daripada penternakan ikan keli di sungai melaka menggunakan azolla sp..  - .  . 

zulfakar, s.s, mohd shapie, s.a., abd azman, s.a, abu bakar, n.f., ariffin, f.d., abdul halim, a.  (2020).  characterization of bacterial strains isolated from selected aquaculture farm and its relationship with water quality index.  - malaysian applied biology society virtual seminar 2020.  1. 

khairiatul mardiana jansar, marlia mohd hanafiah, azhar abdul halim.  (2020).  visual communication technique to enhance teaching and learning processes in quantitative analysis and instrumentation course.  - kongres dan pertandingan inovasi pengajaran dan pembelajaran 2020.  70. 

sarah nadira hurairah, nurulhuda md lajis, azhar abdul halim.  (2020).  methylene blue removal from aqueous solution by adsorption on archidendron jiringa seed shells.  - journal of geoscience and environment protection.  128-143. 

zawawi daud, amir detho, mohd arif rosli, mahmoud hijab abubakar, kamran ahmed samo, nur faizan mohammad rais, azhar abdul halim, husnul azan tajarudin.  (2020).  ammoniacal nitrogen and cod removal from stabilized landfill leachate usinggranular activated carbon and green mussel (perna viridis) shell powder as acomposite adsorbent.  - desalination and water treatment.  111-117. 

nurulhana nordin, azhar abdul halim, marlia mohd hanafiah, wan zuhairi wan yaacob.  (2020).  color removal of textile industry wastewater by adsorption using a potential hybrid composite carbon-graphite.  - international conference on earth sciences and environment 2020 (icemen2020).  1-4. 

nurul farahana kamaludin, nurul azimah naen, azhar abdul halim, normah awang, syazawani shamsudin.  (2020).  peranan kulit archidendron jiringa (jering) sebagai bahan penjerap logam berat kromium dalam air sisa industri.  - majalah impak siri 1/2020.  19. 

marlia m. hanafiah, muhamad f. zainuddin, nurul u. m. nizam, azhar halim, akhtar rasool.  (2020).  phytoremediation of aluminium and iron from industrial wastewater using ipomoea aquatica and centella asiatica.  - applied sciences.  1-13. 

anuar ithnin;azhar bin abdul halim;farah diyana binti ariffin.  (2020).  kesan kualiti pencemaran udara dalaman sekolah yang didirikan berhampiran bekas tapak perlupusan sampah ke atas kesihatan pelajar sekolah di smk taman dato’ harun, petaling jaya, selangor.  - .  . 

siti shahara zulfakar, siti aida abd azman, shazlin aida mohamad shapie, nur faizah abu bakar, farah diyana ariffin & azhar abdul halim.  (2020).  bacterial contamination from selected catfish pond farming at sungai kesang, melaka and its susceptibility to antimicrobial agents.  - international conference on sciences, technology, education & management (instem) 2020 in conjunction with picoms science & management symposium (picomsam) 2020.  1-20. 

nurulhana nordin, nur amirah ahmad asmadi, mohan kumar manikam, azhar abdul halim, marlia mohd hanafiah, sarah nadira hurairah.  (2020).  removal of hexavalent chromium from aqueous solution byadsorption on palm oil fuel ash.  - journal of geoscience and environment protection.  112-127. 

farah diyana ariffin, prof. madya dr. azhar abdul halim, prof madya dr. marlia mohd hanafiah, prof. madya dr. normah awang, dr. mohd sham othman.  (2020).  jaringan penyelidikan kesihatan alam sekitar di antara sehap melaka dan ukm: rawatan air sisa daripada kolam penternakan ikan keli di sungai kesang.  - .  1-44. 

farah diyana ariffin, azhar abdul halim, marlia mohd hanafiah, normah awang, mohd sham othman.  (2019).  heavy metals concentration of african catfish pond farm's effluent.  - 12th international symposium of health sciences.  1. 

farah diyana ariffin, azhar abdul halim, marlia mohd hanafiah, normah awang, mohd sham othman, siti aida abd. azman, nur syafiqah mohd bakri.  (2019).  kesan pelepasan air sisa dari kolam penternakan ikan keli di sungai kesang, malaka terhadap alam sekitar.  - 5th nehap conference 2019.  1. 

siti shahara zulfakar, siti aida abd azman, nur faizah abu bakar, farah diyana ariffin and azhar abdul halim.  (2019).  bacterial contamination from selected catfish pond farming at sungai kesang, melaka and its susceptibility to antimicrobial agents.  - 9th international fisheries symposium 2019.  354. 

farah diyana ariffin, azhar abdul halim, marlia mohd hanafiah, nor azira ramlee.  (2019).  kebolehupayaan fitoremediasi oleh azolla pinnata dalam merawat air sisa akuakultur.  - sains malaysiana.  281-289. 

farah diyana ariffin, azhar abdul halim, marlia mohd hanafiah, normah awang, mohd sham othman, azman, s. a. a., bakri, n. s. m.  (2019).  the effects of african catfish, clarias gariepinus pond farms effluent on water quality of kesang river in malacca, malaysia.  - applied ecology and environmental research.  1531-1545. 

nur amirah ahmad asmadi, nurulhana nordin, mohan kumar manikam, azhar abdul halim.  (2019).  adsorption of chromium hexavalent on palm oil fuel ash waste.  - palm oil industry development for a sustainable economy (poidse) seminar & workshop 2019.  43-48. 

mohan kumar manikam, maizatul intan syafinaz, azhar abdul halim, marlia mohd hanafiah.  (2019).  penyingkiran ammonia dan permintaan oksigen kimia daripada air sisa kumbahan menggunakan media penjerap komposit karbon teraktif.  - sains malaysiana.  2529-2939. 

muzzneena ahmad mustapha, azhar abdul halim, mohd rozi umor.  (2019).  bridging issue in addressing the agenda for sustainable development.  - sains malaysiana.  2297-2604. 

mohan kumar manikam, azhar abdul halim, marlia m. hanafiah, renga rao krishnamoorthy.  (2019).  removal of ammonia nitrogen, nitrate, phosphorus and cod from sewage wastewater using palm oil boiler ash composite adsorbent.  - desalination and water treatment.  23-30. 

nazlizan nasir, zawawi daud, aeslina abd kadir, ab aziz abdul latiff, baharin ahmad, noorain suhani, halizah awang, adeleke abdulrahman oyekanmi, azhar abdul halim.  (2019).  removal of ammonia nitrogen from rubber industry wastewater using zeolite as adsorbent.  - malaysian journal of fundamental and applied sciences.  862-866. 

siti hafizan hassan, azhar abdul halim.  (2019).  advanced oxidation processes (aops) in water and wastewater treatment.  - .  16. 

mohan kumar manikam, azhar abdul halim, marlia mohd hanafiah.  (2019).  pollutants removal from sewage wastewater using palm oil fuel ash.  - the 2018 ukm fst postgraduate colloquium , aip conference proceeding.  1-7. 

nor syafiqah shaharuddin, mohan kumar manikam, azhar abdul halim.  (2018).  siri penyelidikan sains sekitaran dan sumber alam 2018.  - .  6. 

khai ern lee, ramli abdullah, marlia mohd hanafiah, azhar abdul halim, mazlin mokhtar, choo ta goh & lubna alam.  (2018).  environmental risk analysis for asian-oriented, risk-based watershed management : japan and malaysia.  - .  8. 

fathul karim sahrani, haja maideen kader maideen, azhar abdul halim, muhammad ashahadi dzulka.  (2018).  siri penyelidikan sains sekitaran dan sumber alam 2018.  - .  437. 

lee khai ern;mazlin mokhtar;mohd. raihan bin taha;azhar bin abdul halim;andrew kam jia yi;marlia binti mohd hanafiah;goh choo ta;lubna alam.  (2018).  responsible governance of chemical industries towards sustainability.  - .  . 

nurul farahana kamaludin, nurul azimah naen, normah awang, azhar abdul halim, norraphat uttraphan pim.  (2018).  the effectiveness of archidendron jiringa dried shell particles as chromium adsorbent through column adsorption study.  - the 15th symposium of malaysian society of applied biology 2018.  . 

zawawi daud, nazlizan nasir, aeslina abdul kadir, ab aziz abdul latiff, mohd baharudin ridzuan, halizah awang, azhar abdul halim.  (2018).  potential of agro waste-derived adsorbent material for colour removal.  - defect and diffusion forum.  292-296. 

mohan kumar, azhar abdul halim & marlia m. hanafiah.  (2018).  pollutants removal from sewage wastewater using palm oil fuel ash.  - international conference on clean water, air and soil (cleanwas).  . 

zawawi daud, mohd arif rosli, ab aziz abdul latiff, mohd baharudin ridzuan, halizah awang, azhar abdul halim.  (2018).  micro-peat as a potential low-cost adsorbent material for cod and nh3-n removal.  - defect and diffusion forum.  297-301. 

lee khai ern;mazlin mokhtar;azhar bin abdul halim;jamaludin bin haji badusah;wan zawiah binti wan zin @ wan ibrahim;marlia binti mohd hanafiah;rahmah elfithri;goh choo ta;hassimi bin abu hasan.  (2018).  remediation of alur ilmu river water through phytoremediation.  - .  . 

nur amirah ahmad asmadi, azhar abdul halim.  (2018).  siri penyelidikan sains sekitaran & sumber alam 2018.  - .  4. 

farah diyana arifin, azhar abdul halim, marlia m. hanafiah, normah awang & mohd sham othman.  (2018).  the effects of clarias gariepinus pond farming effluent on water quality parameters of kesang river in malacca, malaysia.  - international conference on clean water, air and soil (cleanwas).  . 

nur syarina asman, azhar abdul halim, marlia mohd hanafiah & farah diyana ariffin.  (2017).  penentuan kualiti air daripada sistem penuaian air hujan di kolej ungku omar, ukm bangi.  - sains malaysiana.  1211-1219. 

mohd hafiyyan mahmud, khai ern lee, mazlin mokhtar, marfiah ab wahid, thian lai goh, norbert simon, marlia mohd hanafiah, azhar abdul halim.  (2017).  spatial distribution of water quality index in stormwater channel: a case study of alur ilmu, ukm bangi campus.  - asia pacific environmental and occupational health journal.  33-38. 

zawawi daud, mahmoud hijab abubakar, aeslina abdul kadir, abdul aziz abdul latiff, halizah awang, azhar abdul halim, aminaton marto.  (2017).  adsorption studies of leachate on cockle shells.  - international journal of geomate.  46-52. 

mohd arif rosli, zawawi daud, ab aziz abdul latiff, shahril effendi a rahman, adeleke abdulrahman oyekanmi, adnan zainorabidin, halizah awang, azhar abdul halim.  (2017).  the effectiveness of peat-ac composite adsorbent in removing color and fe from landfill leachate.  - international journal of integrated engineering.  35-38. 

nur hanani thaldiri, marlia mohd. hanafiah, azhar abdul halim.  (2017).  effect of modified micro-sand, poly-aluminium chloride and cationic polymer on coagulation-.  - environment & ecosystem science (ees).  1-3. 

azhar abdul halim, siti fairuz abu sidi, marlia mohd hanafiah.  (2017).  ammonia removal using organic acid modified activated carbon from landfill leachate.  - environment & ecosystem science (ees).  28-30. 

azhar abdul halim, marlia mohd hanafiah, khairi, a.  (2017).  ammonia removal from sewage wastewater using chemically modified sand.  - applied ecology and environmental research.  521-528. 

marlia mohd hanafiah, mohamed yasreen mohamed ali, nur izzah hamna abdul aziz, muhammad aqeel ashraf, azhar abdul halim, lee, khai ern, idris, mushrifah.  (2017).  biogas production from goat and chicken manure in malaysia.  - applied ecology and environmental research.  . 

zawawi daud, nazlizan nasir , aeslina abd kadir, ab aziz abdul latiff, baharin ahmad, noorain suhani, halizah awang, azhar abdul halim.  (2017).  treatment of biodiesel wastewater using ferric chloride and ferric sulfate.  - international journal of integrated engineering.  54-57. 

abdul fattah abu bakar, siti nathasa md barkawi, marlia mohd. hanafiah, lee khai ern & azhar abdul halim.  (2016).  penyingkiran ammonia dan logam berat dari air sisa industri automotif menggunakan pasir terubahsuai secara kimia.  - sains malaysiana.  1509 - 1516. 

azhar abdul halim & siti hafizan hassan.  (2016).  control and treatment of landfill leachate for sanitary waste disposal.  - .  Chapter 2 : 24-42. 

mohd hafiyyan mahmud, khai ern lee, mazlin mokhtar, thian lai goh, marfiah ab wahid, norbert simon, marlia mohd hanafiah, azhar abdul halim.  (2016).  spatial distribution of water quality index in a stormwater channel: a case study of alur ilmu, ukm bangi campus.  - international conference on environment and occupational health 2016.  . 

khai ern lee, mazlin mokhtar, marlia mohd hanafiah, azhar abdul halim, jamaludin badusah.  (2016).  rainwater harvesting as an alternative water resource in malaysia: potential, policies and development.  - journal of cleaner production.  218-222. 

fawaz al-badaii, azhar abdul halim & mohammad shuhaimi-othman.  (2016).  evaluation of dissolved heavy metals in water of the sungai semenyih (peninsular malaysia) using environmetric methods.  - sains malaysiana.  841-852. 

devagi subramaniam, azhar a. halim, marlia m. hanafiah.  (2016).  performance of electrochemical oxidation in treating textile industry wastewater by graphite electrode.  - nature environment & pollution technology.  1021-1026. 

zawawi daud, mahmoud hijab abubakar, aeslina abdul kadir, ab aziz abdul latiff, halizah awang, azhar abdul halim, aminaton marto.  (2016).  optimization of leachate treatment with granular biomedia: feldspar and zeolite.  - indian journal of science and technology.  1-5. 

azhar abdul halim, kee ke han, marlia mohd hanafiah.  (2015).  removal of methylene blue from dye wastewater using river sand by adsorption.  - nature environment and pollution technology.  89-94. 

mohamed yasreen mohamed ali, marlia mohd hanafiah, yeong hui wen, mushrifah idris, nur izzah hamna abdul aziz, azhar abdul halim, khai em lee.  (2015).  biogas production from different substrates under anaerobic conditions.  - 3rd lnternational conference on chemical, agricultural and medical sciences (cams-2015).  65-67. 

khai ern lee, marlia mohd hanafiah, azhar abdul halim, mohd hafiyyan mahmud.  (2015).  primary treatment of dye wastewater using aloe vera-aided aluminium and magnesium hybrid coagulants.  - procedia environmental sciences.  56-61. 

abdul fattah abu bakar, azhar abdul halim, marlia mohd hanafiah.  (2015).  optimization of coagulation-flocculation process for automotive wastewater treatment using response surface methodology.  - nature environment and pollution technology.  567-572. 

anuar ithnin, muhammad shakirin, nurhudayanti mohd yusof, shamrul aizam abd. rahman and azhar abdul halim.  (2015).  study on air quality and influences on human respiratory health among residents who occupy building at former landfill site.  - nature environment and technology.  385-390. 

khai ern lee, marlia mohd hanafiah, azhar abdul halim, mohd hafiyyan mahmud.  (2015).  primary treatment of dye wastewater using aloe vera-aided aluminium and magnesium hybrid coagulants.  - international conference on environmental forensics 2015.  . 

anuar ithnin, mira azilah ibrahim, che radziah che md. zain and azhar abdul halim.  (2015).  isolation and characterization of encoded formaldehyde responsive gene from dieffenbachia compacta.  - nature environment and pollution technology.  435-438. 

anuar ithnin, nadiah yahya and azhar abdul halim.  (2014).  effect of dust level towards working comfort among employees in train depot.  - world applied sciences journal.  29(8):994-999. 

devagi subramaniam, azhar abdul halim.  (2014).  effect of electrochemical oxidation on biodegradability and toxicity of batik industry wastewater.  - aip conference proceeding - the 2014 ukm fst postgraduate colloquium.  597-602. 

nur hanani thaldiri, azhar abdul halim.  (2013).  coagulation-flocculation in leachate treatment using modified micro sand.  - aip conference proceedings -ukm fst postgraduate colloquium.  . 

a. a. halim, mohd. firhad ahmad.  (2013).  isoterma dan kinetik penjerapan boron oleh batu kapur sebagai penjerap berkos rendah.  - sains malaysiana.  42(12):1689-1696. 

azhar abdul halim, nor alia roslan, nor shamsiah yaacub & mohd. talib latif.  (2013).  boron removal from aqueous solution using curcumin-impregnated activated carbon.  - sains malaysiana.  42(9):1293-1300. 

azhar abdul halim, mohd talib latif and anuar ithnin.  (2013).  ammonia removal from aqueous solution using organic acid modified activated carbon.  - world applied sciences journal.  24(1):1-6. 

abdul fattah abu bakar & azhar abdul halim.  (2013).  poly-aluminum chloride, ferric chloride, aluminum sulfate.  - aip conference proceeding : the 2013 ukm fst postgraduate colloquium.  524-529. 

azhar abdul halim, nur hanani thaldiri, normah awang and mohd talib latif.  (2012).  removing boron from an aqueous solution using turmeric extract-aided coagulation-flocculation.  - american journal of environmental sciences.  8(3):322-327. 

anuar ithnin, m. normah awang, m. fidaie, azhar abdul halim, a. mohd ridzuan.  (2012).  study on the effect of leachates from old dumping site on water quality of sungai batu in taman wahyu ii, selayang, selangor.  - global journal of environmental research.  6(1):22-29. 

fatma omran m. alahmr, murnira othman, nurul bahiyah abd wahid, azhar abdul halim, mohd talib latif.  (2012).  compositions of dust fall around semi-urban areas in malaysia.  - aerosol and air quality research.  12(4):629-642. 

azhar abd halim, abdul fattah abu bakar, megat ahmad kamal megat hanafiah and haslizaidi zakaria.  (2012).  boron removal from aqueous solutions using curcumin-aided electrocoagulation.  - middle-east journal of scientific research.  11(5):583-588. 

azhar a.h., aimi syaza c.a..  (2012).  ammonia removal from an aqueous solution using chemical surface- modified sand.  - health and the environment journal.  3(2):17-24. 

azhar abdul halim, hamidi abdul aziz, megat azmi megat johari,kamar shah ariffin and mohammed j.k. bashir.  (2012).  semi-aerobic landfill leachate treatment using carbon minerals composite adsorbent.  - environmental engineering science.  29(5):306-312. 

azhar abdul halim, aimi shaza che azmi.  (2012).  ammonia removal from an aqueous solution using chemical surface modified sand.  - international environment and health conference.  . 

nor hasleda mamat @ alias, azhar abdul halim, muhammad ikram a wahab.  (2011).  penyingkiran boron dari larutan akuas menggunakan penjerap komposit berasaskan karbon-mineral.  - sains malaysiana.  40(11):1271-1276. 

azhar abdul halim, noor nazurah zainal abidin, normah awang, anuar ithnin, mohd. sham othman, mohd. ikram wahab.  (2011).  ammonia and cod removal from synthetic leachate using rice husk composite adsorbent.  - journal of urban and environmental engineering (juee).  5(1):24-31. 

azhar ah, nur hanani t, normah a, mohd talib l.  (2011).  boron removal from aqueous solution using turmeric extract aided coagulation-flocculation.  - proceeding of the 2nd international seminar on environmental health.  . 

azhar abdul halim, nor alia roslan, normah awang, mohd. hasamizi mustapa, mohd. fadzil arshad.  (2011).  boron removal in aqueous solutions using curcumin impregnated activated carbon.  - 10th international annual symposium (umtas 2011) - empowering science, technology and innovation towards a better tomorrow.  . 

azhar abdul halim, eliani ezani, mohd. sham othman, normah awang, m. ikram, a. ithnin.  (2011).  adsorption study of aluminium onto curcuma longa.  - australian journal of basic and applied sciences.  5(5):1170-1177. 

normah awang, ibrahim baba, bohari m. yamin and azhar abdul halim.  (2011).  preparation, characterization and antimicrobial assay of 1,10-phenanthroline and 2,2`-bipyridyl adducts of cadmium(ii) n-sec-butyl-n-propyldithiocarbamate: crystal structure of cd[s2cn(i-c4h9 )(.  - world applied sciences journal.  12(9):1568-1574. 

muhammad ikram, amornpon changsuphan, nguyen thi kim oanh and azhar abdul halim.  (2011).  potential use of a combine ozone and uv over zeolite coated with zno nanoparticles for gases benzene elimination.  - australian journal of basic and applied sciences.  5(5): 191-200. 

normah awang, ibrahim baba, bohari m yamin, mohd sham othman and azhar abdul halim.  (2011).  synthesis, characterization and crystal structure of triphenyltin (iv) n-alkyl-n-cyclohexyldithiocarbamate compounds.  - world applied sciences journal.  12(5):630-635. 

alias, n.h.m., halim, a.a., wahab, m.i.a..  (2011).  penyingkiran boron daripada larutan akuas menggunakan penjerap komposit berasaskan karbon-mineral.  - sains malaysiana.  40(11):1271-1276. 

awang normah, kamaludin nurul farahana, barnard ester, hamid asmah, norfadilah rajab and azhar abdul halim.  (2011).  cytotoxic and genotoxic effect of triphenyltin(iv) benzylisopropyldithiocarbamate in thymoma murine cell line (wehi 7.2).  - research journal of chemistry and environment.  15(2):544-549. 

azhar abdul halim, farahdilla abu bakar, nazurah zainal abidin, normah awang, m. ikram wahab, anuar ithnin.  (2011).  effect of the acidic food flavors and turmeric towards aluminium leachability.  - australian journal of basic and applied sciences.  5(9): 597-601. 

anuar ithnin, radiah abu hasan shaari, mazrura sahani, anuar mohd mokhtar, azhar abdul halim, normah awang.  (2011).  effects of pollutant diesel fuels on neurobehavioral performance among workers in locomotive depot.  - american journal of environmental sciences.  7(3):248-253. 

azhar abdul halim, hamidi abdul aziz, megat azmi megat johari, kamar shah ariffin.  (2010).  comparison study of ammonia and cod adsorption on zeolite, activated carbon and composite materials in landfill leachate treatment.  - desalination.  article in press. 

anuar i, nurulakhmar as, mazrura s, azhar ah..  (2010).  kajian sakit belakang dan faktor-faktor yang mempengaruhinya di kalangan pekerja pemasangan industri automotif.  - journal of community health.  Vol 16 (2):7-13. 

hamidi abdul aziz, jaya paul arumai dhas, mohd. noordin adlan and bassim h.hameed, mohd. hasnain isa, azhar abdul halim, yung-tse hung.  (2010).  cod and colour removals from textile industry wastewater: post-treatment by activated carbon and limestone.  - international journal of environment and pollution.  in-press. 

normah awang, nor syaidatul akmal mohd yousof, ibrahim baba, nor fadilah rajab, asmah hamid, bohari m. yamin & azhar abdul halim.  (2010).  synthesis and characterization of organotin(iv) n-methyl-n-isopropyldithiocarbamate compounds: x-ray crystal structure of (ch3)2sn[s2cn(ch3)(i-c3h7)]2.  - world applied sciences journal.  9(7): 804-810. 

azhar abdul halim, hamidi abdul aziz, megat azmi megat johari, kamar shah ariffin, mohd. nordin adlan.  (2010).  ammoniacal nitrogen and cod removal from semi-aerobic landfill leachate using a composite adsorbent : fixed bed column adsorption performance.  - journal of hazardous materials.  175(1-3):960-964. 

azhar abdul halim, hamidi abdul aziz, megat azmi megat johari, kamar shah ariffin and yung-tse hung.  (2009).  removal of ammoniacal nitrogen and cod from semi-aerobic landfill leachate using low-cost activated carbon-zeolite composite adsorbent.  - international journal of environment and waste management.  4(3-4):399-411. 

nor eliani ezani, azhar abdul halim, mazrura sahani.  (2009).  isoterma dan kinetik penjerapan aluminium terhadap curcuma longa.  - persidangan kebangsaan kejuruteraan awam kelima, awam`09, pusat pengajian kejuruteraan awam, kampus kejuruteraan, universiti sains malaysia, nibong tebal, pulau pinang, malaysia.  . 

azhar ah., hamidi aa., megat azmi mj., kamar sa. & mazrura s..  (2008).  pencirian larut lesapan dari tapak pelupusan sampah semi-aerobik pulau burung.  - national conference on environment & health 2008.  . 

azhar abdul halim, muhammad mubin mat nor, hukil sino, mohd. sham othman & mazrura sahani.  (2008).  kualiti udara dalaman bagi kenderaan persendirian yang melalui kesesakan jalan raya di pusat bandar kuala lumpur.  - national conference on environment & health 2008.  . 

azhar abdul halim, hamidi abdul aziz, m. azmi m. johari, kamar shah ariffin.  (2008).  ammoniacal nitrogen and cod removal from semi-aerobic landfill leachate using carbon-mineral composite adsorbent.  - international seminar on chemistry 2008, unpad, bandung, indonesia.  . 

azhar abdul halim, hamidi abdul aziz, zawawi daud, m. azmi m. johari, kamar shah ariffin.  (2007).  olahan ammonia dan cod dalam larut lesapan semi-aerobik menggunakan karbon teraktif, zeolit dan media komposit : satu kajian perbandingan.  - prosiding kebangsaan awam`07,langkawi, kedah, 29hb 31hb mei 2007 (p.p. kejuruteraan awam, usm).  . 

azhar a. h., hamidi a. a., megat azmi m. j. and kamar shah a..  (2006).  landfill leachate treatment using combination of hydrophobic-hydrophilic and low cost adsorption materials as a single media.  - 1st civil engineering colloquium ( cec`06 ) usm, engineering campus, nibong tebal, penang.  .