Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals: A Review

XU Yi; LIANG Xuefeng; XU Yingming; QIN Xu; HUANG Qingqing; WANG Lin; SUN Yuebing

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Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals: A Review

机译：粘土矿物修复重金属污染的农业土壤的研究进展

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Heavy metal contamination of agricultural soils poses risks and hazards to humans.The remediation of heavy metal-polluted soils has become a hot topic in environmental science and engineering.In this review,the application of clay minerals for the remediation of heavy metal-polluted agricultural soils is summarized,in terms of their remediation effects and mechanisms,influencing factors,and future focus.Typical clay minerals,natural sepiolite,palygorskite,and bentonite,have been widely utilized for the in-situ immobilization of heavy metals in soils,especially Cd-polluted paddy soils and wastewater-irrigated farmland soils.Clay minerals are able to increase soil pH,decrease the chemical-extractable fractions and bioavailability of heavy metals in soils,and reduce the heavy metal contents in edible parts of plants.The immobilization effects have been confirmed in field-scale demonstrations and pot trials.Clay minerals can improve the environmental quality of soils and alleviate the hazards of heavy metals to plants.As main factors affecting the immobilization effects,the pH and water condition of soils have drawn academic attention.The remediation mechanisms mainly include liming,precipitation,and sorption effects.However,the molecular mechanisms of microscopic immobilization are unclear.Future studies should focus on the long-term stability and improvement of clay minerals in order to obtain a better remediation effect.

机译：农业土壤中的重金属污染对人类构成了风险和危害。重金属污染土壤的修复已成为环境科学与工程领域的研究热点。本文综述了粘土矿物在重金属污染农业修复中的应用。综述了土壤的修复作用，作用机理，影响因素及未来发展方向。典型的粘土矿物，天然海泡石，坡缕石和膨润土已被广泛用于土壤中重金属的原位固定化，尤其是镉污染的稻田土壤和废水灌溉的农田土壤。粘土矿物能够提高土壤的pH值，降低土壤中重金属的化学可萃取成分和生物利用度，并减少植物可食部分中的重金属含量。在田间示范和盆栽试验中得到证实。粘土矿物质可以改善土壤的环境质量并减轻雾霾。作为影响固定化作用的主要因素，土壤的pH值和水分条件引起了学术界的关注。修复机制主要包括石灰，沉淀和吸附作用。然而，微观固定化的分子机制尚不清楚未来的研究应着眼于粘土矿物的长期稳定性和改良，以获得更好的修复效果。

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来源
《土壤圈（英文版）》 |2017年第2期|193-204|共12页
作者
XU Yi; LIANG Xuefeng; XU Yingming; QIN Xu; HUANG Qingqing; WANG Lin; SUN Yuebing;
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作者单位

College of Resources and Environment,Hunan Agricultural University,Changsha 410128(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands,Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191(China);

Key Laboratory of Original Environmental Quality of MOA/Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety,Tianjin 300191(China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals: A Review

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