文献类型: 外文期刊
作者: Cao, Zewei 1 ; Wang, Shengxiao 1 ; wang, Ting 2 ; Chang, Zhizhou 3 ; Shen, Zhenguo 1 ; Chen, Yahua 1 ;
作者机构: 1.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Foreign Language Inst, Nanjing 210095, Jiangsu, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing, Jiangsu, Peoples R China
4.Jiangsu Collaborat Innovat Ctr Solid Organ Waste, Nanjing, Jiangsu, Peoples R China
5.Natl Joint Local Engn Res Ctr Rural Land Resource, Nanjing, Jiangsu, Peoples R China
关键词: anaerobic digestion;phytoremediation;heavy metal;contamination;methane
期刊名称:INTERNATIONAL JOURNAL OF PHYTOREMEDIATION ( 2020影响因子:3.212; 五年影响因子:3.275 )
收录情况: SCI
摘要: This study investigated the anaerobic digestion capability of five plants and the effects of copper (Cu) and S,S'-ethylenediaminedisuccinic acid (EDDS, a chelator widely used in chelant-assisted phytoremediation) on biogas production to determine a feasible disposal method for plants used in remediation. The results showed that in addition to Phytolacca americana L., plants such as Zea mays L., Brassica napus L., Elsholtzia splendens Nakai ex F. Maekawa, and Oenothera biennis L. performed well in biogas production. Among these, O. biennis required the shortest period to finish anaerobic digestion. Compared to normal plants with low Cu content, the plants used in remediation with increased Cu levels (100 mg kg(-1)) not only promoted anaerobic digestion and required a shorter anaerobic digestion time, but also increased the methane content in biogas. When the Cu content in plants increased to 500, 1000, and 5000 mg kg(-1), the cumulative biogas production decreased by 12.3%, 14.6%, and 41.2%, respectively. Studies also found that EDDS conspicuously restrained biogas production from anaerobic digestion. The results suggest that anaerobic digestion has great potential for the disposal of contaminated plants and may provide a solution for the resource utilization of plants used in remediation.
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