| 周春羊,管冬兴,韩永和,潘岳,房煦,王兴雨,郑建伦,李亚青,魏天娇,邹宜涛,崔昕毅,罗军.基于梯度扩散薄膜技术的太湖金属和营养盐区域污染特征分析[J].农业环境科学学报,2016,35(6):1144-1152. |
| 基于梯度扩散薄膜技术的太湖金属和营养盐区域污染特征分析 |
| Pollution characteristics of metals and nutrients in different regions of Lake Taihu based on diffusive gradients in thin-films technique |
| 投稿时间：2016-03-02 |
| DOI：10.11654/jaes.2016.06.017 |
| 中文关键词: 太湖 梯度扩散薄膜技术(DGT) 沉淀状氧化锆吸附膜 磷 有效态含量 区域污染 |
| 英文关键词: Lake Taihu DGT precipitated zirconia gel P speciation regional pollution |
| 基金项目:国家自然科学基金项目(21477053) |
| 作者 | 单位 | E-mail | | 周春羊 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 管冬兴 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 韩永和 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 潘岳 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 房煦 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 王兴雨 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 郑建伦 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 李亚青 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023
南京农业大学资源与环境科学学院, 南京 210095 | | | 魏天娇 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 邹宜涛 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 崔昕毅 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | | | 罗军 | 南京大学环境学院, 污染控制与资源化国家重点实验室, 南京 210023 | esluojun@nju.edu.cn |
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| 中文摘要: |
| 本研究利用梯度扩散薄膜技术(Diffusive gradients in thin-films,DGT)对太湖7个湖区的水体和沉积物中金属与营养盐有效态含量进行原位监测,并分析污染物的区域特征。结果表明,DGT所测有效态浓度低于传统化学方法所提取浓度,且能实现低浓度、多元素同时监测。具体来看,太湖水体中金属的DGT有效态含量较低,区域差别较小。沉积物中9种典型金属的DGT有效态含量排序为Fe> Mn> Zn> Ni> As> W> Co> Mo> Cu,其中,Fe、As、Zn、Ni和W在竺山湾、梅梁湾和贡湖污染相对较重,在湖心区、胥湖和东太湖污染相对较轻,其余金属分布较平均且含量较低。与金属不同的是,太湖水体中DGT所测的有效磷(P)含量整体较高,最高值出现在贡湖,达83.2 μg·L-1。沉积物中DGT有效态P的区域分布更明显,以竺山湾、梅梁湾和沿岸区污染相对较重,最高值出现在竺山湾,达500 μg·L-1。对比沉积物和水体中DGT有效态P含量发现,竺山湾、梅梁湾和沿岸区沉积物可能是P的主要储存场所,具有潜在释放风险。 |
| 英文摘要: |
| Concentrations of metals and nutrients in water and sediments from 7 different regions in Lake Taihu were measured using in situ diffusive gradients in thin-films(DGT) technique. Their regional pollution characteristics were evaluated. Results showed that the concentrations of metals and nutrients measured by DGT were lower than those by chemical extraction. Simultaneous measurements of multiple elements at ultra-low concentration levels were obtained using DGT. No obvious differences were found in DGT-measured concentrations of metals in water among 7 regions, while large differences were observed in DGT-measured concentrations of metals in sediments among these regions. Iron, As, Zn, Ni and W were heavily polluted in Zhushan Bay, Meiliang Bay and Lake Gong, compared to the central Lake, Lake Xu and East Lake Taihu. Overall, the order of DGT-measured concentrations of metals in sediments was Fe> Mn> Zn> Ni> As> W> Co> Mo> Cu. Unlike metals, the average P concentrations measured by DGT in water were high, with the highest value(83.2 μg·L-1) appeared in Lake Gong. As for DGT-measured P in the sediments, Zhushan Bay, Meiliang Bay and Coastal region were heavily polluted, with the highest value of 500 μg·L-1 detected. By comparing P concentrations in sediments with those in water, it was found that the sediments in Zhushan Bay, Meiliang Bay and Coastal region probably acted as P sources, which potentially released P to the overlying water. |
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