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How accompanying ions affect soil heavy metal removal by polyepoxysuccinic acid during washing?
Zhong, Qinmei; Zhang, Shirong; Li, Ting; Gong, Guoshu; Xu, Xiaoxun; Wang, Guiyin; Pan, Xiaomei; Zhou, Wei; Pu, Yulin; Long, Lulu; Yang, Shengtao; Yuan, Yue.
Afiliación
  • Zhong Q; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China; Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Min
  • Zhang S; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China. Electronic address: srzhang01@aliyun.com.
  • Li T; College of Resources, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Gong G; College of Agronomy, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Xu X; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Wang G; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Pan X; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Zhou W; College of Resources, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Pu Y; College of Resources, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Long L; College of Environmental Sciences, Sichuan Agricultural University, 611130, Chengdu, PR China.
  • Yang S; Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University, 610041, Chengdu, PR China.
  • Yuan Y; Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, College of Chemistry and Environment, Southwest Minzu University, 610041, Chengdu, PR China.
Chemosphere ; 343: 140289, 2023 Dec.
Article en En | MEDLINE | ID: mdl-37769923
Soil washing with green eluent is an efficient technique to remediate heavy metal contaminated farmland. In addition to eluent, less is known about the roles of accompanying ions on heavy metal removal. We investigated the effects of accompanying ions including Fe3+, Mn2+, Ca2+, Mg2+, Al3+, Si4+ and PO43- on the desorption of Pb2+ and Cd2+ in paddy and arid soils using ethylenediaminetetraacetic acid and polyepoxysuccinic acid as eluents. The release rates of target and accompanying ions showed significant fast and slow reaction stages based on corresponding analysis and kinetic models. In fast reaction stage, Pb2+ and Cd2+ performed geochemical analogy with Ca2+, Mg2+ and PO43-. The release curves of these ions were fitted well with Elovich model, indicating that they released from oxysalt surface into solution via ion exchange, and dissolution of Fe/Mn/Al/Si (hydr)oxides through H+- and ligand-promoted dissolution. In slow reaction stage, Pb2+ and Cd2+ were related to Fe3+, Mn2+, Al3+ and Si4+, which were controlled by intraparticle diffusion process. H+ slowly diffused into interlayer of phyllosilicates to displace target and accompanying ions by ion exchange. Therefore, this research filled the gap of accompanying ions driving the release behavior of heavy metal ions during leaching.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemosphere Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemosphere Año: 2023 Tipo del documento: Article Pais de publicación: Reino Unido