Graphene oxide influences bacterial community and soil environments of Cd-polluted Haplic Cambisols in Northeast China  

作　　者：Jiaxin Ru Guoyou Chen Yong Liu Ying Sang Jinfeng Song 

机构地区：[1]Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education,School of Forestry,Northeast Forestry University,Harbin 150040,Heilongjiang,People’s Republic of China [2]Inspection and Testing Center for Quality of Cereals and their Products-Ministry of Agriculture and Rural Aff airs,Quality and Safety Institute of Agricultural Products,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,Heilongjiang,People’s Republic of China [3]Xinghua Products Quality Inspection and Testing Center,No.4 Zhonghe Road,Taizhou 225700,Jiangsu,People’s Republic of China

出　　处：《Journal of Forestry Research》2021年第4期1699-1711,共13页林业研究（英文版）

基　　金：supported financially by the National Natural Science Foundation of China (31370613);the Fundamental Research Funds for the Central Universities(2572019CP15)。

摘　　要：Graphene oxide(GO),a carbon nanomaterial that is widely used in the environment and other industries,may pose potential risks to ecosystems,especially the soil ecosystem.Some soils in Northeast China are frequently polluted with cadmium(Cd) metal.However,there is no study on the influence of GO on the Cd-contaminated soil microbial community and soil chemical properties.In this study,Cd(100 mg kg^(-1))-polluted soils were treated with different concentrations of GO(0,25,50,150,250,and 500 mg L^(-1),expressed as T1,T2,T3,T4,T5,and T6,respectively) for 40 days.The treatment without Cd pollution and GO served as the control(CK).Then,we investigated the influence of the GO concentrations on the bacterial community and chemical properties of Cd-polluted Haplic Cambisols,the zonal soil in Northeast China.After GO addition,the richness and diversity indexes of the bacterial community in Cd-contaminated Haplic Cambisols initially increased by 0.05-33.92% at 25 mg L^(-1),then decreased by0.07-2.37% at 50 mg L^(-1),and then increased by 0.01-24.37%within 500 mg L^(-1) again.The species and abundance of bacteria varied with GO concentration,and GO significantly increased bacterial growth at 25 and 250 mg L^(-1).GO treatments influenced the bacterial community structure,and the order of similarity of the bacterial community structure was as follows:T4=T5> T1=T6> T2> T3> CK.Proteobacteria and Acidobacteria were the dominant bacteria,accounting for 36.0% and 26.2%,respectively,of soil bacteria.Different GO treatments also significantly affected the metabolic function of bacteria and further influenced the diversity of the bacterial community structure by affecting several key soil chemical properties:soil pH,organic matter and available potassium,phosphorus,and cadmium.Our results provide a theoretical basis for scientific and comprehensive evaluation of the environmental impacts of GO on the zonal forest soils of Northeast China.

关 键 词：Cadmium pollution Haplic cambisols Graphene oxide Bacterial community Soil environmental factors 

分 类 号：X53[环境科学与工程—环境工程] TQ127.11[化学工程—无机化工]