杂交狼尾草和类芦对Cd、Cu、Zn和Pb复合污染土的修复  

Hybrid Pennisetum and Neyraudia phytoremediation of soil contaminated by Cd,Cu,Zn and Pb

作　　者：余晓华[1] 邓金川[2] 王明祖[1] 郑晶 郭微[1] 刘萍[1] 周阳梅 YU Xiaohua;DENG Jinchuan;WANG Mingzu;ZHENG Jing;GUO Wei;LIU Ping;ZHOU Yangmei(College of Horticulture and Landscape Architecture,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;College of Environmental Sciences and Engineering,Zhongkai University ofAgriculture and Engineering,Guangzhou 510225,China;South China Institute ofEnvironmental Sciences Ministry of Environmental Protection,Guangzhou 510655,China)

机构地区：[1]仲恺农业工程学院园艺园林学院,广东广州510225 [2]仲恺农业工程学院环境科学与工程学院,广东广州510225 [3]环境保护部华南环境研究所,广东广州510655

出　　处：《仲恺农业工程学院学报》2018年第3期9-14,共6页Journal of Zhongkai University of Agriculture and Engineering

基　　金：广东省自然科学基金(2016A030313372);大学生创新基金(1134712085)资助项目

摘　　要：为探讨类芦(Neyraudia reynaudiana (kunth) Keng)及杂交狼尾草新品系1号(Pennisetum americanum×P.purpureum cv. 23A×N51 cv. Huanan No. 1;以下简称杂交狼尾草)对复合重金属污染土壤的修复作用,以3种污染程度不同的电子废物污染干土(其Cd、Pb、Cu、Zn重金属全量分别为4 678. 44、14 181. 13和15 026. 89以及重金属全量为270. 04 mg/kg田园土为对照),盆栽两种植物,刈割两茬,测定地上生物量和Cd、Pb、Cu、Zn重金属含量.结果表明,与对照相比,不同重金属污染程度下两种植物第2茬生物量都显著降低(P <0. 05);而第1茬生物量类芦各处理间无显著差异(P> 0. 05),杂交狼尾草污染最严重下显著低于其他各处理的.土壤不同污染处理下两植物重金属含量除少数与对照差异不显著外,绝大多数高于对照的;不同污染处理间绝大多数差异不显著.类芦除了第2茬的Pb外、杂交狼尾草除第1茬的Cu外,各处理间两植物重金属含量差异显著,且污染土下重金属含量显著或明显高于对照.类芦轻度污染下富集Cd含量最高,分别为0.83(第1茬)、0.74 mg/kg(第2茬);杂交狼尾草Cd含量第1茬轻度污染下为0.76 mg/kg显著高于其他各处理;第2茬轻度和重度污染下其Cd含量分别为1.13、1.19 mg/kg,显著高于其他各处理.两种植物污染土种植下积累Zn浓度也较高,其次为Cu、Pb.第2茬与第1茬相比,两植物对照处理下的4种重金属含量都明显减少;污染土相同处理间Cu和Pb的含量都明显减少而Cd和Zn含量都明显增加.轻度污染下两植物4种重金属迁移总量最高,且其Cd的迁移总量显著高于其他各处理;其次类芦对Zn、Cu,杂交狼尾草对Zn、Pb的迁移总量也较高.因此杂交狼尾草修复电子废物Cd、Zn、Pb及Cu污染土壤的潜力明显高于类芦,并且两者都适合栽植在该研究的轻度污染下作为重金属积累植物.The heavy metal soil restoration effect of Neyraudia reynaudiana （kunth）Keng （abb. for Neyraudia） and Pennisetum americanum × P. purpureum cv.23A×N51 cv.Huanan No.1 （abb. for Pennisetum） transplanted in contaminated soil from e-waste recycling site were explored, whose heavy metal Cd, Cu, Zn, Pb total concentration were 4 678.44, 14 181.13 and 15 026.89 mg/kg as different level pollution, and 270.04 mg/kg as control （clean soil） respectively. Thus four treatments were designed in the experiment, and the plants were clipped two times, whose above biomass and heavy metal content of Cd, Pb, Cu, and Zn were determined. The results showed that the above biomass of the second clipping of two kinds of plants decreased significantly （ P 〈0.05）, and the biomass of plants planted in the contaminated soil was more less than the control s significantly （ P 〈0.05）. For the first clipping, the biomass of Neyraudia of four treatments was not significantly different, and biomass of Pennisetum planted in severe pollution was lower than the other treatments significantly. Mostly, the content of the two kinds of plants planted in polluted soil was higher than in control. Except for Pb content of Neyraudia of first clipping and Cu content of Pennisetum of the second clipping, the other heavy metal content was significantly different between the treatments, and higher significantly or distinctly in pollution than in control. As for Neyraudia, the Cd accumulation was the highest in light pollution, and they were 0.83 mg/kg （first clipping）, 0.74 mg/kg（second clipping）. As to Pennisetum, the Cd accumulation was higher in light pollution than in other treatments, and it was 0.76 mg/kg （first clipping）, and the Cd accumulation of second clipping was 1.13 mg/kg in light pollution, 1.19 mg/kg in severe pollution, which were higher significantly than in their other treatments. However, the Zn accumulation of Neyraudia and Pennisetum was high planted in e-waste soil, and also Cu and Pb nextly. Com

关 键 词：杂交狼尾草(Pennisetum americanum×P.purpureum) 类芦(Neyraudia reynaudiana(kunth)Keng) 重金属 土壤 植物修复 

分 类 号：X503[环境科学与工程—环境工程]