Distribution and potential ecological risk of 50 phenolic compounds in three rivers in Tianjin, China.
Distribution and potential ecological risk of 50 phenolic compounds in three rivers in Tianjin, China.
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DOI：
10.1016/j.envpol.2017.12.037
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发表时间：
2018-04
影响因子：
8.9
通讯作者：
Wenjue Zhong;Donghong Wang;Zijian Wang
中科院分区：
文献类型：
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作者：
Wenjue Zhong;Donghong Wang;Zijian Wang
酚类化合物广泛存在于许多国家的地表水中，然而，很少有研究同时分析和评价水环境中不同组分中的广谱酚类化合物。因此，本研究分析了天津市三条重要河流地表水、沉积物和悬浮颗粒物中50种酚类化合物的分布特征及其潜在生态风险。定性结果表明，三条河流中普遍存在酚类污染，水体中酚类化合物的种类相对高于沉积物和悬浮颗粒物中的酚类化合物。定量分析结果表明，丰水期样品中酚类污染比枯水期严重。大沽河3种组分中酚类化合物的总含量均远高于北塘河和永定新河。3种组分中酚类化合物总浓度最高值均出现在DDR的丰水期样品中，地表水、悬浮颗粒物和沉积物中酚类化合物总浓度最高值分别为1354 μg/L、719 μg/kg dw和2937 μg/kg dw。采用商值法对地表水中酚类化合物的生态风险进行了评价，确定了风险商（RQ）> 1（YDXR的RQ > 0.3）的酚类化合物为优先污染物。确定了5种酚类化合物为BDR中的优先酚类化合物，其风险大小顺序为2-甲酚> 2，4-二甲酚> 2-仲丁基苯酚> 2-萘酚> 3-甲酚。共鉴定出6种酚类化合物为DDR中的优先酚类化合物，其风险大小顺序为2-萘酚>对氯间二甲酚> 4-甲酚> 3-甲酚> 2，4-二甲酚> 2，3，6-三甲基苯酚。在YDXR中，只有苯酚、2-萘酚和2，4-二甲酚被鉴定为优先酚类化合物。
Phenolic compounds widely exist in the surface water of many countries; however, few studies have simultaneously analyzed and evaluated broad-spectrum phenolic compounds in various components of the water environment. Therefore this study analyzed the distribution and potential ecological risk of 50 phenolic compounds in the surface water, sediment and suspended particulate matter of three important rivers in Tianjin, the main heavy industry city with high pollution in China. The qualitative results show that phenolic pollution existed extensively in the three rivers and the kinds of phenolic compounds in the water were relatively higher than in both sediment and suspended particulate matter. The quantitative results show that the phenolic pollution in the wet-season samples was serious than dry-season samples. Meanwhile, total concentrations of phenolic compounds in three components from the Dagu Drainage River (DDR) were all much higher than those in the Beitang Drainage River (BDR) and Yongdingxin River (YDXR). The highest total concentrations of phenolic compounds in three components all appeared in wet-season samples in DDR, and the highest total concentration was 1354 μg/L in surface water, 719 μg/kg dw in suspended particulate matter and 2937 μg/kg dw in sediment, respectively. The ecological risk of phenolic compounds in surface water was evaluated using the quotient method, and phenolic compounds with risk quotient (RQ) > 1 (RQ > 0.3 for YDXR) were identified as priority pollutants. Five kinds of phenolic compounds were identified as priority phenolic compounds in BDR, and the order of risk was 2-cresol > 2,4-xylenol > 2-sec-butylphenol > 2-naphthol > 3-cresol. Six kinds of phenolic compounds were identified as priority phenolic compounds in DDR, and the order of risk was 2-naphthol > p-chloro-m-xylenol > 4-cresol > 3-cresol > 2,4-xylenol > 2,3,6-Trimethylphenol. In YDXR, only phenol, 2-naphthol and 2,4-xylenol were identified as priority phenolic compounds.