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长江上游重庆段某二级支流新污染物的分布特征及风险评价
摘要点击 210  全文点击 20  投稿时间:2024-06-05  修订日期:2024-08-23
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中文关键词  新污染物  长江流域  污染分布  风险评估  综合评分法
英文关键词  emerging pollutants  Yangtze River Basin  pollution distribution  risk assessment  comprehensive evaluation method
作者单位E-mail
袁胜 重庆市生态环境科学研究院, 重庆 401147
中国环境科学研究院西南分院, 重庆 401147 
insightys@qq.com 
刘姜艳 重庆市生态环境科学研究院, 重庆 401147
中国环境科学研究院西南分院, 重庆 401147 
 
范例 重庆市生态环境科学研究院, 重庆 401147
中国环境科学研究院西南分院, 重庆 401147 
fanli1007@foxmail.com 
王学兵 南京大学环境学院污染控制与资源化研究国家重点实验室, 南京 210023  
张勇 重庆市生态环境科学研究院, 重庆 401147
中国环境科学研究院西南分院, 重庆 401147 
 
宾灯辉 重庆市生态环境科学研究院, 重庆 401147
中国环境科学研究院西南分院, 重庆 401147 
 
杨槟榕 重庆市生态环境科学研究院, 重庆 401147  
韦斯 南京大学环境学院污染控制与资源化研究国家重点实验室, 南京 210023 weisi@nju.edu.cn 
李庆武 中机中联工程有限公司, 重庆 400039  
中文摘要
      为了解长江流域支流地表水、地下水和沉积物中新污染物的含量特征和生态风险,采集了长江上游某二级支流流域内的地表水、地下水和沉积物样本,利用超高效液相色谱串联飞行时间质谱仪识别到44 种新污染物,并对其分布特征和风险进行分析研究. 结果表明,新污染物在该流域内不同环境介质中普遍存在,44 种新污染物检出率在10%~100%,化合物在地表水、地下水和沉积物中的含量平均值范围分别为37.85~117.57 ng·L-1、17.28~101.09 ng·L-1和1.57~14.68 ng·g-1. 地表水中浓度最高的为三氯蔗糖(SCL),L-焦谷氨酸(L-PA)和邻苯二甲酸单(2-乙基己基)酯(MEHP)在地表水、地下水和沉积物中均有较高含量;流域内新污染物的赋存情况与农业活动、工业生产相关. 风险评估结果显示,4-羟基苯甲醛(4-HB)、1H-苯并三唑(BTA)、2-羟基莠去津(HAT)和MEHP对藻类、蚤类和鱼类具有较高或者潜在风险,藻类对新污染物污染的敏感程度高于蚤类和鱼类. 通过综合评价法在地表水共中筛选出的5 种Ⅰ类优先特征污染物,分别为MEHP、HAT、罗红霉素(ROM)、BTA和双氢睾酮(DDET),建议后续的工作中加强对相关化合物的监测和管理,同时重视化合物的来源、环境归趋和降解转化机制.
英文摘要
      To provide a preliminary understanding of the characteristics and ecological risks of the levels of emerging pollutants in surface water, groundwater, and sediment in the tributaries of the Yangtze River Basin, this study uses ultra-high performance liquid chromatography tandem time-of-flight mass spectrometry. Approximately 44 emerging pollutants were detected from surface water, groundwater, and sediment samples collected from a watershed surrounding industrial parks. The distribution characteristics and risks of emerging pollutants were investigated. The results showed that emerging pollutants were found in the basin, with a detection rate of 10%-100%. The average contents of emerging pollutants in surface water, groundwater, and sediment were 37.85-117.57 ng·L-1,17.28-101.09 ng·L-1, and 1.57-14.68 ng·g-1, respectively. Among them, sucralose (SCL) content was the highest in surface water, and L-pyrogulosine (L-PA) and monoethylhexyl phthalate (MEHP) were found in high concentrations in surface water, groundwater, and sediment. The occurrence of new pollutants in the basin was related to agricultural activities (such as pesticide spraying and non-standard management of pesticide packaging) and industrial production activities (such as food packaging, electronic equipment manufacturing industry, etc.). According to the results of risk assessment, 4-hydroxybenzaldehyde (4-HB), 1H-benzotriazole (BTA), 2-hydroxyatrazine (HAT), and MEHP had high or potential risks to algae, invertebrates (invert), and fish. Additionally, algae were more sensitive to emerging pollutants than invert and fish. Five Class I priority characteristic pollutants were selected from surface water by the comprehensive evaluation method, namely MEHP, HAT, roxithromycin (ROM), BTA, and dihydrotestosterone (DDET). It is recommended to strengthen the monitoring and management of related compounds in the subsequent work and to pay attention to the source, environmental trend, and degradation and transformation mechanism of compounds.

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