Combination application of elemental sulfur and earthworm increased the lead (Pb) uptake by ryegrass (Lolium perenne L.) in contaminated agricultural soil
文献类型： 外文期刊
作者： Sun, Lijuan 1 ; Gong, Peiyun 1 ; Song, Ke 1 ; Sun, Yafei 1 ; Qin, Qin 1 ; Zhang, Hong 1 ; Lv, Weiguang 1 ; Xue, Yong 1 ;
作者机构： 1.Shanghai Acad Agr Sci, ECOenvironm Protect Res Inst, Shanghai 201403, Peoples R China
2.Shanghai Environm Protect Monitoring Stn Agr, Shanghai 201403, Peoples R China
关键词： Earthworm; Elemental sulfur (S-0); Lead (Pb); Ryegrass; Remediation; Bioavailability
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）
ISSN： 0944-1344
年卷期：
页码：
收录情况： SCI
摘要： The phytoremediation efficiency is largely depends on the bioavailability of heavy metal in soil. The activity of earthworms and oxidation of elemental sulfur (S-0) in soil has influence on heavy metal speciation transformation in soil. By conducting pot experiment, we examined the possibility of enhancing phytoextraction efficiency of lead (Pb) in soil by ryegrass (Lolium perenne L.) with application of both S-0 and earthworms. Results showed that the addition of S-0 decreased soil pH and increased soil CEC, while a slight trend of decrease for soil pH and increase for CEC was found with earthworm application. In soil treated with earthworms, the addition of S-0 increased the concentration of DTPA-extractable Pb by 9.9 similar to 20.8%. The concentration of diffusive gradients in thin film (DGT)-extractable Pb was increased by 26.31 similar to 32.9% with S-0 and earthworm addition. In soil treated with earthworms, the addition of S-0 increased the concentration of Pb in shoots of ryegrass by 55.7 similar to 110.4% and the translocation factor of Pb in ryegrass was also increased by S-0 addition. Our results suggested that the combination application of earthworms and S-0 could be an effective way to enhance the remediation efficiency of ryegrass for Pb-contaminated soil.
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