Zinc pollution in zones dominated by algae and submerged macrophytes in Lake Taihu

被引：32
作者：
Chen, Musong [1 ]
Wang, Dan [2 ]
Ding, Shiming [1 ]
Fan, Xianfang [1 ]
Jin, Zengfeng [1 ,3 ]
Wu, Yuexia [1 ]
Wang, Yan [1 ,4 ]
Zhang, Chaosheng [5 ,6 ]
机构：
[1] Chinese Acad Sci, Nanjing Inst Geog & Umnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
[2] Shanghai Waterway Engn Design & Consulting Co Ltd, Shanghai 200120, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Nanjing EasySensor Environm Technol Co Ltd, Nanjing 210018, Jiangsu, Peoples R China
[5] Natl Univ Ireland, Sch Geog & Archaeol, Int Network Environm & Hlth, Galway, Ireland
[6] Natl Univ Ireland, Ryan Inst, Galway, Ireland
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2019年 / 670卷
关键词：
Lake sediments; Algal blooms; Submerged macrophytes; Zinc pollution; High-resolution techniques; DISSOLVED ORGANIC-MATTER; IRON-COUPLED INACTIVATION; HEAVY-METALS; IN-SITU; DIFFUSIVE GRADIENTS; FRESH-WATER; THIN-FILMS; SEDIMENTS; PHOSPHORUS; CONTAMINATION;
D O I：
10.1016/j.scitotenv.2019.03.167
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Zinc (Zn) contamination in lake zones dominated by algae and macrophytes in Lake Taihu was analyzed through diffusive gradient in thin films (DGT) and dialysis (HR-Peeper) methods. It was found that in both zones Zn contamination varied by season. In July and October, dissolved Zn was present in high concentrations, and in July, high concentrations of labile Zn were found in sediments. In July, reductive dissolutions of Fe/Mn oxides likely played a key role in the release of Zn, which was confirmed by both zones having the lowest percentage of the reducible fraction of Zn in July. Complexation of dissolved organic matter (DOM) with Zn may be responsible for the observed increase in the dissolved Zn concentration in October. This conclusion was supported by noting that October had the highest percentages of Zn-DOM complexes (25.3% and 34.4%) in the algae- and macrophytes-dominated zones, respectively. However, in January, low dissolved and labile Zn contents were observed in sediments in the two zones, suggesting that the decrease of Zn in sediments was caused by the adsorption of Fe/Mn oxides. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：361 / 368
页数：8
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