Arsenic adsorption mechanism on palm oil fuel ash (POFA) powder suspension

被引：33

作者：

Yusof, Mohamad Sukri Mohamad ^{[1
]}

Othman, Mohd Hafiz Dzarfan ^{[1
]}

Wahab, Roswanira Abdul ^{[2
,3
]}

Jumbri, Khairulazhar ^{[4
]}

Razakb, Fazira Ilyana Abdul ^{[2
,3
]}

Kurniawan, Tonni Agustiono ^{[5
]}

Abu Samah, Rozaimi ^{[6
]}

Mustafa, Azeman ^{[1
]}

Rahman, Mukhlis Abdul ^{[1
]}

Jaafar, Juhana ^{[1
]}

Ismail, Ahmad Fauzi ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Adv Membrane Technol Res Ctr, Sch Chem & Energy Engn, Fac Engn, Utm Johor Bahru 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Dept Chem, Fac Sci, Utm Johor Bahru 81310, Johor, Malaysia

[3] Fac Sci, Enzyme Technol & Green Synth Grp, Dept Chem, Utm Johor Bahru 81310, Johor, Malaysia

[4] Univ Teknol PETRONAS, Dept Fundamental & Appl Sci, Seri Iskandar 32610, Perak, Malaysia

[5] Xiamen Univ, Coll Environm Ecol, Key Lab, Minist Educ Coastal & Wetland Ecosyst, Xiamen 361102, Fujian, Peoples R China

[6] Univ Malaysia Pahang, Fac Chem & Nat Resources Engn, Lebuhraya Tun Razak, Kuantan 26300, Pahang, Malaysia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 383卷

关键词：

Water and wastewater treatment; Agricultural waste; Low cost adsorbent; Heavy metal; BET analysis; LOW-COST; HEAVY-METALS; MESOPOROUS SILICA; RICE HUSK; WATER; NANOCOMPOSITE; INSIGHTS; ISOTHERM; ARSINE; DYE;

D O I：

10.1016/j.jhazmat.2019.121214

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 g(-1), respectively, were obtained when POFA of 30 mu m particle size was employed at pH 3 with the highest calcination temperature at 1150 degrees 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 SiO- 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.

引用

页数：10

共 64 条

[1] A comprehensive assessment of arsenic in commonly consumed foodstuffs to evaluate the potential health risk in Bangladesh [J].