Effects of biochar on the migration and transformation of metal species in a highly acid soil contaminated with multiple metals and leached with solutions of different pH

被引：44
作者：
Jia, Mingyun [1 ,2 ]
Yu, Jinping [1 ]
Li, Zhu [2 ]
Wu, Longhua [2 ]
Christie, Peter [2 ]
机构：
[1] Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing 210014, Peoples R China
[2] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China
来源：
CHEMOSPHERE | 2021年 / 278卷
基金：
中国国家自然科学基金;
关键词：
Soil metals; Speciation; Acid rain; Leaching; Immobilization; HEAVY-METAL; ORGANIC-MATTER; STRAW BIOCHAR; CADMIUM; IMMOBILIZATION; TOXICITY; MOBILITY; LEAD; SORPTION; HYPERACCUMULATOR;
D O I：
10.1016/j.chemosphere.2021.130344
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A number of recent studies have been conducted on soil metal immobilization by biochars but there is little information on the migration and transformation of metal species in soils contaminated with multiple metals as affected by biochar and acid rain. Here, a column study investigated the effects of biochar derived from maize straw pyrolyzed at 600 degrees C on metal (Cu, Pb, Zn and Cd) mobility in a highly acid soil during leaching with simulated acid rain. All four metals examined were released at early stages of the leaching process and the percentages of the metals leached followed the sequence Zn > Cd > Cu > Pb. Acid rain with high acidity resulted in larger amounts of metals leached, particularly at the later stages of leaching. This enhancement of leaching by highly acidic leaching solutions was eliminated by amendment with biochar. However, the effects of biochar on metal mobility depended on metal species, with significant immobilization of soil Cu, Zn and Pb (>90%, 26% and 72%, respectively) but with no effect on soil Cd. Overall, simulated acid rain enhanced soil metal mobility and biochar reduced soil metal mobility and also alleviated the effects of acid rain. More emphasis is needed on metal speciation in the use of biochars for soil metal immobilization in areas with acid rain. The use of biochars in phytoremediation may decrease the toxicity of soil metals to the hyperaccumulator plant. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：9
相关论文
共 51 条
[11]   A comparative study on biochar properties and Cd adsorption behavior under effects of ageing processes of leaching, acidification and oxidation [J].
Chang, Ruihai ;
Sohi, Saran P. ;
Jing, Fanqi ;
Liu, Yuyan ;
Chen, Jiawei .
ENVIRONMENTAL POLLUTION, 2019, 254
[12]   Kinetic approach to heavy metal mobilization assessment in sediments:: choose of kinetic equations and models to achieve maximum information [J].
Fangueiro, D ;
Bermond, A ;
Santos, E ;
Carapuça, H ;
Duarte, A .
TALANTA, 2005, 66 (04) :844-857
[13]   Application of biochar on mine tailings: Effects and perspectives for land reclamation [J].
Fellet, G. ;
Marchiol, L. ;
Delle Vedove, G. ;
Peressotti, A. .
CHEMOSPHERE, 2011, 83 (09) :1262-1267
[14]   Toxicity and DNA damage in tobacco and potato plants growing on soil polluted with heavy metals [J].
Gichner, Tomas ;
Patkova, Zdenka ;
Szakova, Jirina ;
Demnerova, Katerina .
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 2006, 65 (03) :420-426
[15]  
Gong ZiTong Gong ZiTong, 1999, Pedosphere, V9, P193
[16]   Stability of immobilization remediation of several amendments on cadmium contaminated soils as affected by simulated soil acidification [J].
Guo, Fuyu ;
Ding, Changfeng ;
Zhou, Zhigao ;
Huang, Gaoxiang ;
Wang, Xingxiang .
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 2018, 161 :164-172
[17]   Remediation of heavy metal contaminated soils by biochar: Mechanisms, potential risks and applications in China [J].
He, Lizhi ;
Zhong, Huan ;
Liu, Guangxia ;
Dai, Zhongmin ;
Brookes, Philip C. ;
Xu, Jianming .
ENVIRONMENTAL POLLUTION, 2019, 252 :846-855
[18]   Second-order kinetic model for the sorption of cadmium onto tree fern: A comparison of linear and non-linear methods [J].
Ho, YS .
WATER RESEARCH, 2006, 40 (01) :119-125
[19]   Impact of biochar and root-induced changes on metal dynamics in the rhizosphere of Agrostis capillaris and Lupinus albus [J].
Houben, David ;
Sonnet, Philippe .
CHEMOSPHERE, 2015, 139 :644-651
[20]   Mobility, bioavailability and pH-dependent leaching of cadmium, zinc and lead in a contaminated soil amended with biochar [J].
Houben, David ;
Evrard, Laurent ;
Sonnet, Philippe .
CHEMOSPHERE, 2013, 92 (11) :1450-1457
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