Role of extracellular polymeric substances on the behavior and toxicity of silver nanoparticles and ions to green algae Chlorella vulgaris 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Science of the Total Environment
年/卷/期
2019 / 660 /
页码
1182-1190
ISSN号
0048-9697
作者单位
Weifang Univ, Coll Chem & Chem & Environm Engn, Weifang 26061, Peoples R China;Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn,Minist Educ, Tianjin Key Lab Environm Remediat & Pollut Contro, Tianjin 300071, Peoples R China;Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn,Minist Educ, Tianjin Key Lab Environm Remediat & Pollut Contro, Tianjin 300071, Peoples R China;Minist Agr, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China;Penn State Univ, Coll Earth & Mineral Sci, University Pk, PA 16802 USA;Weifang Univ, Coll Chem & Chem & Environm Engn, Weifang 26061, Peoples R China;Weifang Univ, Coll Chem & Chem & Environm Engn, Weifang 26061, Peoples R China;Weifang Univ, Coll Chem & Chem & Environm Engn, Weifang 26061, Peoples R China;Weifang Univ, Coll Chem & Chem & Environm Engn, Weifang 26061, Peoples R China;
作者
Zheng, Shimei;Zhou, Qixing;Chen, Cuihong;Yang, Fengxia;Cai, Zhang;Li, Dan;Geng, Qijin;Feng, Yimin;Wang, Huiqin;
摘要
The effect of extracellular polymeric substances (EPS), vital organic matters and nutrient elements in the natural environment, on the behavior and toxicology of silver nanoparticles (AgNPs) and ions remains ambiguous. In this study, the role of EPS on the toxicity of AgNPs and dissolved silver ions (from AgNO3) to a green algae Chlorella vulgaris was investigated. After the removal of EPS, algae accumulated more silver, about 7.41- and 1.25-fold of those in the algae with EPS for AgNPs and AgNO3 treatments, respectively. The large amount of accumulated silver was bound to the algal cell surface for AgNPs treatment and was internalized in the algae for AgNO3 treatment, irrespective of the presence of EPS in algae. After exposure to AgNPs, the ruffles in the surfaces of algal cells were filled by AgNPs, and almost invisible. FTIR showed that for both AgNPs and AgNO3, the aldehyde groups on the cell surface were oxidized to carboxyl groups by silver ions, irrespective of the presence of EPS in algal cells, indicating that silver ions were released from the oxidization of AgNPs and reacted with algal cells. The content of chlorophyll showed that AgNPs depressed algal growth more remarkably than did AgNO3, independent of the presence of EPS in algae, suggesting that AgNPs had greater toxic effects on algae than did silver ions. The findings suggest that the barrier effect of EPS gave nanoparticles an extraordinary edge over ions, but EPS had no discerning effect on the interaction of algal cells with the silver ions released from AgNPs and AgNO3, and also on the effect of AgNPs and AgNO3 on algal growth. (C) 2019 Elsevier B.V. All rights reserved.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词/主题词
Extracellular polymeric substances;Algae;Silver nanoparticles;Silver ions;
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部