微塑料对超富集植物少花龙葵Cd累积的影响  

Effects of Polyethylene on Cd Accumulation of Hyperaccumulator Solanum photeinocarpum

作　　者：吴萍 张杏锋[1,2] 高波[3,4] 刘杰 陈敏妮[1,2] 何川黔 WU Ping;ZHANG Xingfeng;GAO Bo;LIU Jie;CHEN Minni;HE Chuanqian(College of Environmental Science and Engineering,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin 541004,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin 541004,China;College of Plant and Ecological Engineering,Guilin 541004,China;College of Tourism&Landscape Architecture,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541004 [2]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 [3]桂林理工大学植物与生态工程学院,广西桂林541004 [4]桂林理工大学旅游与风景园林学院,广西桂林541004

出　　处：《环境科学与技术》2022年第1期174-181,共8页Environmental Science & Technology

基　　金：国家自然科学基金(42107025);广西高等学校高水平创新团队及卓越学者计划项目(桂财教函[2018]319号);广西科技重大专项(桂科AA17204047);广西自然科学基金(2018GXNSFAA138045);广西矿冶与环境科学实验中心(KH2012ZD004)。

摘　　要：为研究微塑料对超富集植物修复重金属污染土壤的影响,文章通过温室盆栽实验,以镉(Cd)超富集植物少花龙葵为研究对象,探究聚乙烯(PE)微塑料颗粒(0、0.01%、0.1%、1%)(以w/w计)以及Cd(0、5、15、30 mg/kg)复合作用对少花龙葵生长及Cd累积影响。结果表明:与单一Cd处理相比,0.1%和1%的PE能显著降低土壤pH,提高Cd的生物有效性;5 mg/kg的Cd与PE复合处理显著降低了少花龙葵的生物量,增加了少花龙葵组织中Cd的含量,且Cd含量随着PE浓度的增加显著增加;但所有处理对少花龙葵Cd的累积量均无显著影响。研究表明,少花龙葵的生长及对Cd的吸收会因PE浓度、Cd浓度的不同而异。深入研究微塑料对超富集植物修复效率的影响,对拓展土壤重金属污染植物修复的实际应用具有重要意义。In order to study the effect of microplastics on the remediation of heavy metal polluted soil by hyperaccumulators,the effects of polyethylene(PE)microplastic(0,0.01%,0.1%,1%w/w)and Cd(0,5,15,30 mg/kg)on the growth and Cd accumulation of Solanum photeinocarpum were studied by pot experiment in greenhouse.The results showed that 0.1%and1%PE could significantly reduce soil pH and improve the bioavailability of Cd compared with single Cd treatment.The combined treatment of 5 mg/kg Cd and PE significantly reduced the biomass of S.photeinocarpum,increased the Cd content in the tissue of S.photeinocarpum,and the Cd content increased with the increase of PE concentration.However,all treatments had no significant effect on the accumulation of Cd in S.photeinocarpum.The results showed that the growth and absorption of Cd by S.photeinocarpum were different with PE concentration and Cd concentration.In a word,in-depth study of the impact of microplastics on the efficiency of hyperaccumulation phytoremediation is of great significance to expand the practical application of phytoremediation of soil heavy metal pollution.

关 键 词：微塑料 聚乙烯 镉 少花龙葵 植物修复 

分 类 号：X53[环境科学与工程—环境工程]