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Effect of cornstalk biochar on phytoremediation of Cd-contaminated soil by Beta vulgaris var. cicla L.
Gu, Panxue; Zhang, Yanming; Xie, Huanhuan; Wei, Jing; Zhang, Xinying; Huang, Xun; Wang, Jiayi; Lou, Xinyi.
Afiliação
  • Gu P; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
  • Zhang Y; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China; SGIDI Engineering Consulting (Group) Co., Ltd, No.38, ShuiFeng Road, YangPu District, Shanghai, 200093, China.
  • Xie H; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
  • Wei J; Laboratory for Air Pollution & Environmental Technology, Swiss Federal Laboratories for Materials Science and Technology, Empa, 8600, Dübendorf, Switzerland. Electronic address: jing.wei@empa.ch.
  • Zhang X; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China. Electronic address: zxyshu@shu.edu.cn.
  • Huang X; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
  • Wang J; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
  • Lou X; College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
Ecotoxicol Environ Saf ; 205: 111144, 2020 Dec 01.
Article em En | MEDLINE | ID: mdl-32846295
Cadmium (Cd) contamination is the most common and extensive heavy metal pollution in the farmland of China. Phytoremediation is considered as a promising measure for Cd-contaminated soil remediation, but the remediation efficiency still needs to be enhanced. Biochar as an effective amendment medium is widely manufactured and studied for the soil remediation of heavy metals. In this study, a greenhouse pot trial was conducted to investigate the effects of cornstalk biochar on Cd accumulation of Beta vulgaris var. cicla L. (Beta vulgaris) in Cd contaminated soil. The Cd availability, speciation and nutrients in soil, biomass and Cd chemical forms in the Beta vulgaris root were studied to explore the mechanism that how the cornstalk biochar promoted Cd accumulation in Beta vulgaris. Biochar amendment reduced the DTPA-extractable Cd concentration and stimulated the growth of root. Compared to the Beta vulgaris without biochar treatment, the results of 5% biochar amendment showed that the root dry weight of Beta vulgaris increased to 267%, Cd accumulation in Beta vulgaris increased to 206% and the Cd concentration in leaves and roots increased by 36% and 52%, respectively. Additionally, after 5% biochar was applied to soil, the total content of organic matter-bound Cd and residual Cd increased by 38%, while the content of Fe-Mn oxides-bound Cd decreased by 40%. Meanwhile, Cd may mainly bind to the root cell wall and the ratio of NaCl-extracted Cd to HAc-extracted Cd increased to 166% with 5% biochar amendment. According to our study, Cd in soil can be removed by Beta vulgaris and phytoremediation efficiency can be improved with biochar amendment. The combination of phytoremediation and biochar amendment is a promising strategy for the Cd-contaminated soil remediation.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Biodegradação Ambiental / Cádmio / Beta vulgaris País/Região como assunto: Asia Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes do Solo / Biodegradação Ambiental / Cádmio / Beta vulgaris País/Região como assunto: Asia Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China