Biological transfer of silver under silver nanoparticle exposure and nitrogen transfer via a collembolan- predatory mite food-chain and ecotoxicity of silver sulfide  

作　　者：Simin Li Zhu Li Xin Ke Longhua Wu Peter Christie 

机构地区：[1]CAS Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Institute of Plant Physiology and Ecology,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Shanghai 200032,China

出　　处：《Soil Ecology Letters》2022年第4期435-443,共9页土壤生态学快报（英文）

基　　金：This research was funded by the National Natural Science Foundation of China(41977136).

摘　　要：The development of nanotechnology has accelerated the use of silver nanoparticles(AgNPs)in household chemicals and the accumulation of Ag in sewage treatment systems.The application of sewage sludge products to soils raises concerns over the safety of Ag in the function and biogeochemical cycles of the soil belowground ecosystem.Here,we assess the potential risk of the accumulation and transfer of Ag under AgNPs exposure and its effects on the trophic transfer of nitrogen(N)through a soil animal food chain(Folsomia candida–Hypoaspis aculeifer).The formation of stable silver sulfide(Ag_(2)S)was also studied via a single species test using F.candida.Concentrations of Ag in F.candida increased with increasing AgNPs concentration,as did those in the predator H.aculeifer,but the Ag bioaccumulation factors of both animals were<1.Folsomia candida body tissue 15 N abundance declined markedly compared with that of H.aculeifer.Silver sulfide did have adverse effects on the survival and reproduction of F.candida.The Ag concentrations of F.candida increased with increasing Ag_(2)S concentration in sludge-treated soils.Silver sulfide showed ecotoxicity to the collembolan,therefore ecotoxicity resulting from the transformation and fate of AgNPs in soils needs to be considered before biosolid products are applied to agricultural soils.

关 键 词：AGNPS Ag_(2)S 15N Soil animals Food chain 

分 类 号：S156[农业科学—土壤学] X703[农业科学—农业基础科学]