nadirah abd hamid, nur anisa mohd rashid, saiful fazamil mohd ali,, azhar abdul halim, hukil sino, loong chuen lee .  (2025).  classification of malaysian forest soils by anthropogenic activities based on untargeted non-volatile organic profiles using uhplc technique and chemometric methods for forensic provenance purposes.  - microchemical journal.  1 - 11. 

nur ain najihah binti mohd rosdi, nur izzma hanis abdul halim, jeevna ap sashidharan, nadirah abd hamid, azhar abdul halim, hukil sino, loong chuen lee.  (2024).  land-use classification of malaysian soils by ultra-high performance liquid chromatography (uhplc)-based untargeted data combined with chemometrics for forensic provenance.  - microchemical journal.  1-14. 

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. 

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. 

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. 

nadirah abd hamid, muhamad hilmi baba, hukil sino, azhar abdul halim, loong chuen lee.  (2025).  exploring forest soils variability based on physiochemical properties using correspondence analysis and classification and regression tree for forensic provenance analysis.  - journal of analytical chemistry.  182 - 194. 

fawaz al-badaii, khairiatul mardiana jansar, nurul ain ab jalil, azhar abdul halim.  (2024).  sustainable boron removal from aqueous solutions using pomegranate peel adsorbents: a comprehensive study on isotherms, kinetics, and thermodynamics.  - desalination and water treatment.  1-17. 

noor fatinah mohamad, norsyafina roslan, azhar abdul halim, wan neqhaikal wan abdul karim.  (2024).  penggunaan pasir silika dan karbon teraktif sebagai medium bagi merawat air bawah tanah di hulu langat, selangor.  - sains malaysiana.  3261 - 3273. 

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. 

sarah nadira hurairah, nur syaza mohamad fahimi, azhar abdul halim, marlia mohd hanafiah, nurulhana nordin, nurul ain ab jalil, zawawi daud.  (2023).  archidendron jiringa seed peel extract in the removal of lead from synthetic residual water using coagulation-flocculation process.  - scienceasia.  94-100. 

norlida mohamed hamim, mohammad shahid shahrun, jamaliah jaafar, azhar abdul halim, liew juneng.  (2025).  seasonal variation of irrigation water quality in bachok, kelantan.  - international journal of integrated engineering.  289 - 299. 

nadirah abd hamid, muhamad hilmi baba, hukil sino, azhar abdul halim, loong chuen lee.  (2025).  exploring forest soils variability based on physiochemical properties using correspondence analysis and classification and regression tree for forensic provenance analysis.  - journal of analytical chemistry.  182 - 194. 

nadirah abd hamid, nur anisa mohd rashid, saiful fazamil mohd ali,, azhar abdul halim, hukil sino, loong chuen lee .  (2025).  classification of malaysian forest soils by anthropogenic activities based on untargeted non-volatile organic profiles using uhplc technique and chemometric methods for forensic provenance purposes.  - microchemical journal.  1 - 11. 

nur ain najihah binti mohd rosdi, nur izzma hanis abdul halim, jeevna ap sashidharan, nadirah abd hamid, azhar abdul halim, hukil sino, loong chuen lee.  (2024).  land-use classification of malaysian soils by ultra-high performance liquid chromatography (uhplc)-based untargeted data combined with chemometrics for forensic provenance.  - microchemical journal.  1-14. 

fawaz al-badaii, khairiatul mardiana jansar, nurul ain ab jalil, azhar abdul halim.  (2024).  sustainable boron removal from aqueous solutions using pomegranate peel adsorbents: a comprehensive study on isotherms, kinetics, and thermodynamics.  - desalination and water treatment.  1-17. 

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. 

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. 

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. 

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. 

farah diyana ariffin, chia zhi jie, azhar abdul halim, mohan kumar a/l manikam, nurulhana nordin & noraizah muhd nor.  (2024).  pengoksidaan elektrokimia untuk rawatan air sisa industri batik: manipulasi kemolaran elektrolit dan tempoh rawatan.  - .  127 - 162. 

lee khai ern, mazlin mokhtar, marlia mohd hanafiah, azhar abdul halim.  (2021).  kimia hijau: ke arah kelestarian industri kimia.  - .  259-278. 

siti hafizan hassan, azhar abdul halim.  (2019).  water quality legislation and regulation.  - .  30-45. 

nor syafiqah shaharuddin, mohan kumar manikam, azhar abdul halim.  (2018).  potensi sisa bahan bakar kelapa sawit sebagai media penjerap komposit.  - .  218-223. 

nur amirah ahmad asmadi, azhar abdul halim.  (2018).  penyingkiran kromium hexavalen daripada air sisa sintetik menggunakan sisa bahan bakar kelapa sawit sebagai bahan penjerap.  - .  101-104. 

mohan kumar manikam, azhar abdul halim, farah diyana ariffin.  (2024).  sisa kelapa sawit: penjerap pencemar efluen domestik.  - .  . 

noor fatinah mohamad, norsyafina roslan, azhar abdul halim, wan neqhaikal wan abdul karim.  (2024).  penggunaan pasir silika dan karbon teraktif sebagai medium bagi merawat air bawah tanah di hulu langat, selangor.  - sains malaysiana.  3261 - 3273. 

farah diyana ariffin, fatin khairunnisya hamdan , fatin noraqilah natasha ramzan, azhar abdul halim & fawaz al badaii.  (2024).  potensi nanopartikel besi yang disintesis dari ekstrak buah naga merah untuk penyingkiran kromium dalam air sisa.  - 10th nehap conference.  . 

lee loong chuen;azhar bin abdul halim;hukil bin sino;mohd talib bin latif;raja muhammad zuha bin raja kamal bashah.  (2024).  gandingan teknik kromatografi gas dan kaedah kemometrik tidak bersasar untuk pengesanan residu cecair mudah terbakar untuk penyiasatan forensik.  - .  . 

farah diyana ariffin, chia zhi jie, azhar abdul halim, mohan kumar a/l manikam, nurulhana nordin & noraizah muhd nor.  (2024).  pengoksidaan elektrokimia untuk rawatan air sisa industri batik: manipulasi kemolaran elektrolit dan tempoh rawatan.  - .  127 - 162. 

farah diyana ariffin, fatin khairunnisya hamdan , fatin noraqilah natasha ramzan, azhar abdul halim & fawaz al badaii.  (2024).  potensi nanopartikel besi yang disintesis dari ekstrak buah naga merah untuk penyingkiran kromium dalam air sisa.  - 10th nehap conference.  . 

lee loong chuen;azhar bin abdul halim;hukil bin sino;mohd talib bin latif;raja muhammad zuha bin raja kamal bashah.  (2024).  gandingan teknik kromatografi gas dan kaedah kemometrik tidak bersasar untuk pengesanan residu cecair mudah terbakar untuk penyiasatan forensik.  - .  . 

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.  - .  . 

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, 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.