Ecotoxicological assessment of flocculant modified soil for lake restoration using an integrated biotic toxicity index
文献类型：期刊论文
| 作者 | Wang, Zhibin; Zhang, Honggang; Pan, Gang |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2016-06-15 |
| 卷号 | 97期号:0页码:133-141 |
| 关键词 | Chitosan Cationic starch Modified soil Ecotoxicity Aquatic organisms |
| 英文摘要 | Flocculant modified soils/clays are being increasingly studied as geo-engineering materials for lake restoration and harmful algal bloom control. However, the potential impacts of adding these materials in aquatic ecological systems remain unclear. This study investigated the potential effects of chitosan, cationic starch, chitosan modified soils (MS-C) and cationic starch modified soils (MS-S) on the aquatic organisms by using a bioassay battery. The toxicity potential of these four fiocculants was quantitatively assessed using an integrated biotic toxicity index (BTI). The test system includes four aquatic species, namely Chlorella vulgaris, Daphnia magna, Cyprinus carpio and Limnodrilus hoffmeisteri, which represent four trophic levels in the freshwater ecosystem. Results showed that median effect concentrations (EC50) of the MS-C and MS-S were 31-124 times higher than chitosan and cationic starch, respectively. D. magna was the most sensitive species to the four fiocculants. Histological examination of C carpio showed that significant pathological changes were found in gills. Different from chitosan and cationic starch, MS-C and MS-S significantly alleviated the acute toxicities of chitosan and cationic starch. The toxicity order of the four fiocculants based on BTI were cationic starch > chitosan > MS-S > MS-C. The results suggested that BTI can be used as a quantitative and comparable indicator to assess biotic toxicity for aquatic geo-engineering materials. Chitosan or cationic starch modified soil/clay materials can be used at their optimal dosage without causing substantial adverse effects to the bioassay battery in aquatic ecosystem. (C) 2015 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35989]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Zhibin,Zhang, Honggang,Pan, Gang. Ecotoxicological assessment of flocculant modified soil for lake restoration using an integrated biotic toxicity index[J]. WATER RESEARCH,2016,97(0):133-141. |
| APA | Wang, Zhibin,Zhang, Honggang,&Pan, Gang.(2016).Ecotoxicological assessment of flocculant modified soil for lake restoration using an integrated biotic toxicity index.WATER RESEARCH,97(0),133-141. |
| MLA | Wang, Zhibin,et al."Ecotoxicological assessment of flocculant modified soil for lake restoration using an integrated biotic toxicity index".WATER RESEARCH 97.0(2016):133-141. |
入库方式： OAI收割
来源：生态环境研究中心
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