Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent

doi:10.1016/j.chemosphere.2020.129423

	Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent
	Gao, Shengya 2,4; Wang, Qiming 1,4; Nie, Jing 4; Poon, Chi Sun 1,4; Yin, Hui 2; Li, Jiang-shan 1,3
刊名	CHEMOSPHERE
	2021-05-01
卷号	270 页码:10
关键词	Incinerated sewage sludge ash Arsenic Adsorption Modification
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2020.129423
英文摘要	Adsorption methods have been widely used in wastewater treatment due to its high removal efficiency, easy operation and handling, economic efficiency and little secondary pollution to the environment. In this paper, a high-iron containing incineration sewage sludge ash (ISSA) was modified by combined acid leaching and precipitation processes to improve its adsorption capacity of As(V). The effects of pH, time, temperature and ionic strength on the adsorption of As(V) were investigated by batch adsorption experiments. The results indicated that iron (mainly present as hematite) in the ISSA was rearranged to Fe(SO4)OH. The modified ISSA showed an excellent adsorption potential for As(V) under acidic conditions and the adsorption capacity was around 9 times of the unmodified ISSA at pH 2-3. The adsorption process was fast during the first 2 h and reached an equilibrium at around 6 h. The Freundlich model could well fit the adsorption isotherm data, the presence of NO3- and Cl- had a negligible influence on the As(V) removal by the modified ISSA, while PO43- and SO42- could significantly suppress As(V) removal via competitive adsorption. After 3 cycles of regeneration, the modified ISSA still showed a satisfying adsorption capacity. As(V) was removed by the modified ISSA mainly through ligand exchange reaction with hydroxyl oxygen (OH-) to form inner-sphere complexes. Therefore, the modified ISSA can be a promising material for As(V) removal from wastewater in particular due to the waste recycling potential. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[51861165104] ; Hong Kong Research Grants Council Joint Research Scheme[N_PolyU511/18] ; Environment and Conservation Fund of the Hong Kong SAR government[P0014071]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000631734500087
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25978]
专题	中科院武汉岩土力学所
通讯作者	Poon, Chi Sun; Li, Jiang-shan
作者单位	1.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Hung Hom, Kowloon, Hong Kong, Peoples R China 2.Huazhong Agr Univ, Coll Resources & Environm, Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Gao, Shengya,Wang, Qiming,Nie, Jing,et al. Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent[J]. CHEMOSPHERE,2021,270:10.
APA	Gao, Shengya,Wang, Qiming,Nie, Jing,Poon, Chi Sun,Yin, Hui,&Li, Jiang-shan.(2021).Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent.CHEMOSPHERE,270,10.
MLA	Gao, Shengya,et al."Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent".CHEMOSPHERE 270(2021):10.