TY  - JOUR
N2  - The contribution of palm oil fuel ash (POFA), an agricultural waste as a low cost adsorbent for the removal of arsenite (As(III)) and arsenate (As(V)) was explored. Investigation on the adsorbency characteristics of POFA suspension revealed that the surface area, particle size, composition, and crystallinity of the SiO2 rich mullite structure were the crucial factors in ensuring a high adsorption capacity of the ions. Maximum adsorption capacities of As(III) and As(V) at 91.2 and 99.4 mg gâ??1, respectively, were obtained when POFA of 30 μm particle size was employed at pH 3 with the highest calcination temperature at 1150 °C. An optimum dosage of 1.0 g of dried POFA powder successfully removed 48.7 and 50.2 of As(III) and As(V), respectively. Molecular modeling using the density functional theory consequently identified the energy for the proposed reaction routes between the SiOâ?? and As+ species. The high stability of the POFA suspension in water in conjunction with good adsorption capacity of As(III) and As(V) seen in this study, thus envisages its feasibility as a potential alternative absorbent for the remediation of water polluted with heavy metals. © 2019 Elsevier B.V.
SN  - 03043894
Y1  - 2020///
TI  - Arsenic adsorption mechanism on palm oil fuel ash (POFA) powder suspension
KW  - Adsorbents; Adsorption; Agricultural robots; Agricultural wastes; Agriculture; Cost benefit analysis; Costs; Crystallinity; Density functional theory; Heavy metals; Mullite; Palm oil; Particle size; Particle size analysis; Powder metals; Silica; Silicate minerals; Silicon; Suspensions (fluids); Waste treatment; Wastewater treatment; Water pollution
KW  -  Adsorption capacities; Arsenic adsorption; BET analysis; Calcination temperature; High adsorption capacity; Low-cost adsorbents; Powder suspension; Water and wastewater treatments
KW  -  Chemicals removal (water treatment)
KW  -  absorbent; adsorbent; arsenic; arsenic acid; arsenic trioxide; heavy metal; water
KW  -  adsorption; arsenic; ash; cost analysis; heavy metal; pH; pollutant removal; waste; wastewater treatment
KW  -  adsorption; agricultural waste; Article; calcination temperature; chemical structure; density functional theory; Fourier transform infrared spectroscopy; inductively coupled plasma mass spectrometry; molecular model; optimal drug dose; palm oil fuel ash; particle size; pore size; pore size distribution; pore volume; powder; surface area; suspension; X ray diffraction; X ray fluorescence
N1  - cited By 34
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072572130&doi=10.1016%2fj.jhazmat.2019.121214&partnerID=40&md5=bc35fca3a4e40e67d4c0cb3ff4a53bcd
A1  - Yusof, M.S.M.
A1  - Othman, M.H.D.
A1  - Wahab, R.A.
A1  - Jumbri, K.
A1  - Razak, F.I.A.
A1  - Kurniawan, T.A.
A1  - Abu Samah, R.
A1  - Mustafa, A.
A1  - Rahman, M.A.
A1  - Jaafar, J.
A1  - Ismail, A.F.
ID  - scholars13474
PB  - Elsevier B.V.
AV  - none
JF  - Journal of Hazardous Materials
VL  - 383
ER  -