| Influence of flocculation conditioning on environmental risk of heavy metals in dredged sediment | |
| Song, Zhenzhen; Gao, Hongyu; Zhang, Weijun; Wang, Dongsheng | |
| 2021-11-01 | |
| Source Publication | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| ISSN | 0269-7491 |
| Volume | 287Pages:- |
| Abstract | With the regulation of perfluorooctanesulfonate (PFOS), 6:2 chlorinated polyfluoroalkyl ether sulfonate (6:2 Cl-PFESA) has been used as a potential PFOS alternative in electroplating. In this study, the uptake, translocation and phytotoxicity of PFOS and 6:2 Cl-PFESA in mung bean (Vigna radiata (Linn.) Wilczek.) were investigated. The uptake kinetics of PFOS and 6:2 Cl-PFESA fit the Michaelis-Menten equation well, suggesting that the uptake is a carrier-mediated process. The root concentration factor (RCF) of 6:2 Cl-PFESA (34.55 mL g-1 dw) was 1.27 times that of PFOS (27.11 mL g-1 dw), and the translocation factor (TF) of 6:2 Cl-PFESA (0.177) was 1.07 times that of PFOS (0.165). Exposure to 6:2 Cl-PFESA and PFOS both resulted in the inhibition of mung bean seedling development. Treatment with 6:2 Cl-PFESA and PFOS led to the concentration-dependent elevation of malon-dialdehyde (MDA), carbonyl groups, and phosphorylated histone H2AX (gamma-H2AX) levels in mung bean roots. The MDA and carbonyl group contents induced by 6:2 Cl-PFESA were 1.10-1.35 and 1.03-1.14 times, respectively, those of PFOS. The hydroxyl free radical (.OH) levels in mung bean roots after exposure to PFOS and 6:2 Cl-PFESA were elevated significantly, and the .OH levels induced by 6:2 Cl-PFESA were higher than those induced by PFOS. Hydroxyl free radical levels were positively correlated with the MDA and carbonyl group contents in mung bean roots (p < 0.05). The dynamic changes in some antioxidative enzyme activities in mung bean seedlings were determined, including peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT). The results demonstrated the phytotoxicities of 6:2 Cl-PFESA and PFOS to mung bean in the early developmental stage. 6:2 Cl-PFESA is more harmful to mung beans than PFOS. The production of hydroxyl radical is the mechanism that causes the toxicity of PFOS and 6:2 Cl-PFESA toward plants. |
| Department | 环境水质学国家重点实验室 |
| Keyword | Chlorinated polyfluoroalkyl ether sulfonate Perfluorooctane sulfonate Mung bean Accumulation Toxicity |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/46854 |
| Collection | 环境水质学国家重点实验室 |
| Affiliation | 1.China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 3.Shanxi Univ, Inst Resources & Environm Engn, Taiyuan 030006, Shanxi, Peoples R China |
| Recommended Citation GB/T 7714 | Song, Zhenzhen,Gao, Hongyu,Zhang, Weijun,et al. Influence of flocculation conditioning on environmental risk of heavy metals in dredged sediment[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2021,287:-. |
| APA | Song, Zhenzhen,Gao, Hongyu,Zhang, Weijun,&Wang, Dongsheng.(2021).Influence of flocculation conditioning on environmental risk of heavy metals in dredged sediment.JOURNAL OF ENVIRONMENTAL MANAGEMENT,287,-. |
| MLA | Song, Zhenzhen,et al."Influence of flocculation conditioning on environmental risk of heavy metals in dredged sediment".JOURNAL OF ENVIRONMENTAL MANAGEMENT 287(2021):-. |
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| Influence of floccul（6694KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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