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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 PublicationJOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN0269-7491
Volume287Pages:-
AbstractWith 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
KeywordChlorinated polyfluoroalkyl ether sulfonate Perfluorooctane sulfonate Mung bean Accumulation Toxicity
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46854
Collection环境水质学国家重点实验室
Affiliation1.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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