Effects of atmospheric ageing under different temperatures on surface properties of sludge-derived biochar and metal/metalloid stabilization

Wang, Hong1,2; Feng, Mingyu3; Zhou, Fengsa3; Huang, Xinchen3; Tsang, Daniel C. W.4; Zhang, Weihua3,5

2017-10

10.1016/j.chemosphere.2017.05.175

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Ageing is a common phenomenon during biochar storage and its soil application. In this study, we exposed sludge-derived biochar (SDBC) in the air under 4 degrees C, 22 degrees C, and 45 degrees C for 30-120 d to imitate the ageing process after SDBC production. The aged SDBC was characterized and its sorption capacities for Pb(II), Cr(V) and As(III) were compared with the fresh ones in batch sorption experiments. The results showed an increase in acidity, cation exchange capacity, and carboxyl groups of SDBC surface, but a decrease in alkalinity and Fe(III) species during ageing, indicating the oxidation. In addition, ageing for more than 30 d was found to favor the Pb(II) and As(III) sorption, because of higher density of available oxygen-containing groups. The Cr(VI) sorption was found to be compromised by the ageing, because some reducing agents for Cr(VI) reduction was consumed there. Higher temperatures accelerated the above-mentioned ageing effect. Yet, when the SDBC was applied in the heavy-metal contaminated soil, its performance would be affected by both ageing of SDBC itself as well as long-term interactions among soil components, such as colloids and solution, heavy metals, and SDBC, which require further investigation. (C) 2017 Elsevier Ltd. All rights reserved.

Biochar ageing Metal/metalloid contamination Soil stabilization Sewage sludge Arsenic Lead

SCI ; EI

英语

第一

Hong Kong Research Grants Council[PolyU 15222115]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000407525500021

PERGAMON-ELSEVIER SCIENCE LTD

20172303733978

Arsenic ; Heavy metals ; Iron compounds ; Lead ; Lead compounds ; Reducing agents ; Sewage sludge ; Soil mechanics ; Soil pollution ; Soils ; Sorption ; Stabilization

Sewage Treatment:452.2 ; Soils and Soil Mechanics:483.1 ; Metallurgy and Metallography:531 ; Lead and Alloys:546.1 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

ENVIRONMENT/ECOLOGY

Web of Science

1.South Univ Sci & Technol China, Engn Innovat Ctr Beijing, Beijing 100083, Peoples R China
2.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
5.Sun Yat Sen Univ, Shenzhen Res Inst, Shenzhen, Peoples R China

Wang, Hong,Feng, Mingyu,Zhou, Fengsa,et al. Effects of atmospheric ageing under different temperatures on surface properties of sludge-derived biochar and metal/metalloid stabilization[J]. CHEMOSPHERE,2017,184:176-184.

Wang, Hong,Feng, Mingyu,Zhou, Fengsa,Huang, Xinchen,Tsang, Daniel C. W.,&Zhang, Weihua.(2017).Effects of atmospheric ageing under different temperatures on surface properties of sludge-derived biochar and metal/metalloid stabilization.CHEMOSPHERE,184,176-184.

Wang, Hong,et al."Effects of atmospheric ageing under different temperatures on surface properties of sludge-derived biochar and metal/metalloid stabilization".CHEMOSPHERE 184(2017):176-184.