应用生态学报2017，Vol.28Issue(11)：3759-3766,8.DOI:10.13287/j.1001-9332.201711.032
强还原过程对设施菜地土壤重金属形态转化的影响
Effects of strong reductive process on transformation of heavy metals in protected vegetable soil
摘要
Abstract
The application of sewage and manure in protected vegetable cultivation can induce the occurrence of heavy metals contamination.The present research studied the transformation of heavy metals (Cd,Cu,Pb and Zn) by incubating contaminated protected soil with maize straw and then leaching.The results showed that soil pH was significantly decreased,being more evident in maize straw treatment;soil Eh dropped quickly below-280 mV.Maize straw treatment promoted the activation of Cd,Cu,Pb and Zn from soil,and the total percent of oxidizable fraction and residual fraction of Cd,Cu,Pb and Zn declined at 9th day;the amount of Cd,Cu,Pb and Zn in soil reduced 18.1％,19.0％,16.1％ and 15.7％ at 15th day,respectively.Compared to control,maize straw treatment could increase the concentrations of dissolved Cd and Zn,but Cu decreased.The concentration of colloidal-bound Cd and Pb increased,Cu decreased and no significant change occurred in Zn in maize straw treatment.Strong reductive approach could activate heavy metals in protected vegetable soil,increase the risk of heavy metals accumulation in vegetables,and possibly cause water pollution accompanied with soil water mobilization.关键词
设施菜地/强还原/重金属/形态转化Key words
protected vegetable soil/strong reductive/heavy metals/speciation transformation引用本文复制引用
孙延琛,曾祥峰,杨立琼,石亚楠,陈希娟,庄杰..强还原过程对设施菜地土壤重金属形态转化的影响[J].应用生态学报,2017,28(11):3759-3766,8.基金项目
本文由国家水体污染控制与治理科技重大专项(2015ZX07202-012)和天津市水资源与水环境重点实验室开放基金资助 This work was supported by Major Project of the National Water Pollution Control and Treatment Science and Technology (2015ZX07202-012) and the Opening Fund of Tianjin Key Laboratory of Water Resources and Environment. （2015ZX07202-012）
