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伴矿景天植物汁液还田对土壤重金属形态及植物吸收的影响

李振炫 杨钰莹 董蓓 胡鹏杰 吴龙华 骆永明

李振炫, 杨钰莹, 董蓓, 胡鹏杰, 吴龙华, 骆永明. 伴矿景天植物汁液还田对土壤重金属形态及植物吸收的影响[J]. 环境工程技术学报, 2020, 10(3): 449-455. doi: 10.12153/j.issn.1674-991X.20190152
引用本文: 李振炫, 杨钰莹, 董蓓, 胡鹏杰, 吴龙华, 骆永明. 伴矿景天植物汁液还田对土壤重金属形态及植物吸收的影响[J]. 环境工程技术学报, 2020, 10(3): 449-455. doi: 10.12153/j.issn.1674-991X.20190152
LI Zhenxuan, YANG Yuying, DONG Bei, HU Pengjie, WU Longhua, LUO Yongming. Effect of Sedum plumbizincicola liquor returning to soils on the speciation and phytoextraction of heavy metals[J]. Journal of Environmental Engineering Technology, 2020, 10(3): 449-455. doi: 10.12153/j.issn.1674-991X.20190152
Citation: LI Zhenxuan, YANG Yuying, DONG Bei, HU Pengjie, WU Longhua, LUO Yongming. Effect of Sedum plumbizincicola liquor returning to soils on the speciation and phytoextraction of heavy metals[J]. Journal of Environmental Engineering Technology, 2020, 10(3): 449-455. doi: 10.12153/j.issn.1674-991X.20190152

伴矿景天植物汁液还田对土壤重金属形态及植物吸收的影响

doi: 10.12153/j.issn.1674-991X.20190152
详细信息
    作者简介:

    李振炫(1981—),男,副教授,博士,主要从事水污染控制技术及工程研究,zhenxuan325@163.com

    通讯作者:

    胡鹏杰 E-mail: pjhu@issas.ac.cn

  • 中图分类号: X53

Effect of Sedum plumbizincicola liquor returning to soils on the speciation and phytoextraction of heavy metals

More Information
    Corresponding author: HU Pengjie E-mail: pjhu@issas.ac.cn
  • 摘要: 超积累植物伴矿景天在Cd和Zn污染土壤修复方面展现出广泛应用前景,但收获物压榨脱水后产生的含重金属汁液处理是目前亟待解决的问题。选用酸性和中性土壤,通过盆栽试验将不同剂量的伴矿景天汁液还田并种植伴矿景天,监测土壤中pH、可溶性有机碳(DOC)浓度和CaCl2提取态Cd与Zn(CaCl2-Cd/Zn)浓度动态变化及植物生长和重金属再吸收情况。结果表明:添加汁液后7和30 d,酸性土壤pH升高而中性土壤pH降低,2种土壤中DOC浓度均显著升高;生长中后期土壤pH、DOC浓度与不添加汁液的对照接近;汁液处理的酸性土壤中CaCl2-Cd/Zn浓度随着生长时间延长逐步升高,在第105天达最高,而中性土壤中浓度呈现逐步降低趋势;汁液处理使伴矿景天生长受到抑制,生物量降低,但其地上部Cd浓度升高;酸性土壤用100 mL/kg汁液处理,伴矿景天地上部Cd和Zn吸收量大于汁液带入量,修复后土壤Cd和Zn浓度低于原土的本底值。因此,酸性土壤适当剂量汁液还田并种植伴矿景天,可将汁液带入的Cd和Zn再次吸收去除,达到汁液处理和净化土壤的双重目的。

     

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  • 收稿日期:  2019-08-30
  • 刊出日期:  2020-05-20

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