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Sorption of lead in soil amended with coconut fiber biochar: Geochemical and spectroscopic investigations

文献类型: 外文期刊

作者: Li, Jianhong 1 ; Wu, Zhipeng 1 ; Wu, Weidong 1 ; Wang, Shan-Li 2 ; Zheng, Lirong 3 ; Chen, Dongliang 3 ; Xie, Yu 4 ; Niazi, Nabeel Khan 5 , 6 ; Ok, Yong Sik 6 ; Rinklebe, Joerg 7 , 8 ; Wang, Hailong 8 ;

作者机构: 1.Hainan Univ, Inst Trop Crops, Haikou 570228, Hainan, Peoples R China

2.Natl Taiwan Univ, Dept Agr Chem, Taipei 10617, Taiwan

3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

4.Hainan Acad Agr Sci, Inst Agroenvironm & Soil, Haikou 571100, Hainan, Peoples R China

5.Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad 38040, Pakistan

6.Univ Southern Queensland, Sch Civil Engn & Surveying, Toowoomba, Qld 4350, Australia

7.Korea Univ, Korea Biochar Res Ctr, O Jeong Ecoresilience Inst OJERI, Seoul 02841, South Korea

8.Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea

9.Univ Wuppertal, Sch Architecture & Civil Engn, Inst Fdn Engn Water & Waste Management, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wupperbal, Germany

10.Univ Sejong, Dept Environm Energy & Geoinformat, Seoul 02841, South Korea

11.Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China

12.Foshan Univ, Sch Environm & Chem Engn, Biochar Engn Technol Res Ctr Guangdong Prov, Foshan 528000, Guangdong, Peoples R China

关键词: Immobilization; Heavy metal; SEM-EDS; Synchrotron radiation; Binding site

期刊名称:GEODERMA ( 影响因子:4.848; 五年影响因子:5.181 )

ISSN: 0016-7061

年卷期: 2019 年 350 卷

页码:

收录情况: SCI

摘要: In this study, we applied coconut fiber-derived biochar (CFB) to a lead (Pb)-contaminated soil (at 600 mg kg(-1)) at 2% and 4% (w/w), in order to explore the efficacy and mechanism of CFB to immobilize Pb in soil during a 150-day incubation experiment. Our approach integrated various techniques namely micro-X-ray fluorescence, sequential extraction, X-ray absorption fine structure, scanning electron microscopy combined with energy dispersive X-ray spectroscopy to evaluate the Pb immobilization. Results indicated that the distribution of Pb in the studied soil was significantly affected by CFB application. The Pb content in organic matter bound fraction of the studied soil increased by 29.5% and 33.5% with 2% and 4% CFB, respectively, compared to control soil after 150-day of incubation. Lead-loaded humic acid (HA) and Pb-3(PO4)(2) were higher in the biochar-amended soil (2% CFB) as compared with the control soil. The CFB particles possibly offer more binding sites of PO43- and carboxylic functional groups than the binding sites of-FeO(OH), SiO32-, -Al2O3 and organic functional groups provided by the original soil particles alone (no biochar) for Pb. Overall, this study highlights that CFB can be a potential candidate to immobilize Pb for the restoration and remediation of Pb-contaminated soils.

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