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Sorption mechanisms of lead on soil-derived black carbon formed under varying cultivation systems.
Zhao, Qingjie; Li, Jianhong; Sarkar, Binoy; Wu, Weidong; Li, Boling; Liu, Ruichun; Nawaz, Mohsin; Zia-Ur-Rehman, Muhammad; Wang, Hailong; Wu, Zhipeng.
Afiliação
  • Zhao Q; College of Tropical Crops, Hainan University, Haikou, 570228, China.
  • Li J; Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China.
  • Sarkar B; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom.
  • Wu W; College of Tropical Crops, Hainan University, Haikou, 570228, China.
  • Li B; College of Tropical Crops, Hainan University, Haikou, 570228, China.
  • Liu R; Flood Control and Drought Relief Office of Hangjin County, Ordos, 017400, China.
  • Nawaz M; Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, College of Forestry, Hainan University, Haikou, 570228, China.
  • Zia-Ur-Rehman M; Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan.
  • Wang H; Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China. Electronic
  • Wu Z; College of Tropical Crops, Hainan University, Haikou, 570228, China. Electronic address: peter@hainanu.edu.cn.
Chemosphere ; 261: 128220, 2020 Dec.
Article em En | MEDLINE | ID: mdl-33113653
ABSTRACT
The knowledge about lead (Pb) sorption on soil-derived black carbons (SBCs) under different cultivation intensities of soils is limited. In this study, chemical and spectroscopic methods were applied to investigate the Pb sorption mechanisms on SBCs in soils from a forest land, a rubber plantation area, and a vegetable farm with none, less and highly intensive cultivation, respectively, that are located in the Hainan Island of China. Results showed that the specific surface area and cation exchange capacity of the SBCs from the less and highly intensive cultivation soils were 4.5- and 2.7-fold, and 1.3- and 1.8-fold higher compared to that of SBC from the no-cultivation soil, which subsequently enhanced the Pb sorption capacities of SBCs in iron exchange fraction. Ion exchange and hydrogen bonded Pb fractions together accounted for about 80% of total Pb sorbed on all SBCs at an externally added 1000 mg L-1 Pb solution concentration. The OC-O groups also played key roles in Pb sorption by forming complexes of OC-O-Pb-O and/or OC-O-Pb. Overall, SBCs in soils under all studied cultivation intensities showed high potential to sorb Pb (with the maximum absorbed Pb amount of 46.0-91.3 mg g-1), and increased Pb sorption capacities of the studied soils by 18.7-21.1 mg kg-1 in the stable fraction (complexation). Therefore, SBC might be a potential environment-friendly material to enhance the Pb immobilization capacity of soil.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Solo / Poluentes Ambientais / Fuligem / Chumbo País/Região como assunto: Asia Idioma: En Revista: Chemosphere Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Solo / Poluentes Ambientais / Fuligem / Chumbo País/Região como assunto: Asia Idioma: En Revista: Chemosphere Ano de publicação: 2020 Tipo de documento: Article País de afiliação: China