首页|Water-soluble chitosan promotes remediation of Pb-contaminated soil by Hylotelephium spectabile

Water-soluble chitosan promotes remediation of Pb-contaminated soil by Hylotelephium spectabile

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Water-soluble chitosan(WSC)has been studied for its ability to mobilize soil Pb and promote the phytoremediation by Hylotelephium spectabile in Pb-contaminated fields.We aimed to clarify the internal mechanism by which WSC impacts phytoremediation by examining plant growth and Pb accumulation performance of H.spectabile as well as the Pb form,functional groups,and mineral phases of Pb-contaminated soil.WSC effectively decreased soil pH and activated Pb migration in rhizosphere soils,with a considerable increase in water-soluble and acid-extractable Pb by 29％-102％and 9％-65％,respectively,and a clear decreasing trend in reducible and oxidizable Pb.Fourier-transform infrared spectroscopy revealed a significant increase in amino and hydroxyl groups in the soil generated by WSC.The coordination of Pb with amino and hydroxyl groups may play an important role in the formation of Pb complexes and activation of Pb in soil.In field trials,the application of WSC significantly increased Pb accumulation in H.spectabile by 125.44％,reaching 92 g/hm2.Moreover,the organic matter and nitrogen in the soils were increased by WSC,which improved the growth conditions of H spectabile.No obvious growth inhibition was observed in either the pot or field trials.Therefore,WSC is a promising chelating agent for mobilizing Pb in soil.Additionally,WSC can be potentially used to boost H.spectabil-mediated phytoremediation of Pb-contaminated farmland.

PhytoremediationPb-contaminated soilWater-soluble chitosanHylotelephium spectabileFourier transform infrared spectroscopy

Bingxin Guo、Yiwei Zhang、Junxing Yang、Tianwei Qian、Junmei Guo、Xiaona Liu、Yuan Jiao、Tongbin Chen、Guodi Zheng、Wenjun Li、Fei Qi

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College of Environmental Science and Engineering,Taiyuan University of Technology

Shanxi Key Laboratory of Earth Surface Processes and Resource Ecological Security in Fenhe River Basin

Shanxi Engineering Research Center of Low Carbon Remediation for Water and Soil Pollution in Yellow River Basin,Jinzhong 030600,China

Center for Environmental Remediation,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

Shanxi Transportation Holding Ecological Environment Co.,Ltd.,Shanxi 030000,China

Beijing Key Lab for Source Control Technology of Water Pollution,College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaApplied Basic Research Project of Shanxi Province(China)Horizontal Scientific Research Funds of Taiyuan University of TechnologyHorizontal Scientific Research Funds of Taiyuan University of Technology

42277237222061494190712520210302124220RH2200002532RH2300002821

2024

10.1007/s11783-024-1847-9

环境科学与工程前沿
高等教育出版社

环境科学与工程前沿

影响因子：0.545
ISSN：2095-2201
年,卷(期)：2024.18(7)
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