中文关键词城市湿地水体汞时空分布物料衡算 英文关键词urban wetlandwater bodymercurytemporal and spatial distributionmaterial balance

作者	单位	E-mail
刘伟豪	西南大学资源环境学院, 重庆 400715	liuweihao19930927@163.com
王永敏	西南大学资源环境学院, 重庆 400715 重庆市农业资源与环境研究重点实验室, 重庆 400716
樊宇飞	西南大学资源环境学院, 重庆 400715
吕东威	西南大学资源环境学院, 重庆 400715
王定勇	西南大学资源环境学院, 重庆 400715 重庆市农业资源与环境研究重点实验室, 重庆 400716	dywang@swu.edu.cn

中文摘要 以重庆某集接纳生活污水处理厂出水、水质净化、休闲娱乐为一体的城市湿地公园为研究对象，根据水流流向设点采样，分析了湿地公园内污水处理区、湖泊深度净化区中总汞（THg）和甲基汞（MeHg）的分布特征，并探讨了其源汇关系.结果表明，污水处理区出水THg质量浓度范围为1.98~38.03 ng·L^-1[平均值为（9.10±5.84）ng·L^-1]，出水MeHg质量浓度范围为0.09~0.84 ng·L^-1[平均值为（0.34±0.08）ng·L^-1]；湖泊深度净化区THg质量浓度范围为0.37~85.69 ng·L^-1[平均值为（6.76±2.29）ng·L^-1]，MeHg质量浓度范围为0.04~1.47 ng·L^-1[平均值为（0.35±0.17）ng·L^-1]，人为活动对汞浓度的干扰较为明显.水体总汞、甲基汞垂直分布规律具有一致性，均表现出表层<深层.通过物料衡算，表明该湿地系统水体总汞每年降低155.50 g，水体甲基汞每年降低1.65 g，对下游水体具有保护作用. 英文摘要 The distribution characteristics and the source-sink relationship of total mercury (THg) and methyl mercury (MeHg) were studied in a wastewater treatment area and in a lake deep purification area of a multifunctional urban wetland that integrates domestic sewage treatment plant effluent, water purification, and leisure entertainment in Chongqing. The results showed that the THg concentration ranged from 1.98 ng·L^-1 to 38.03 ng·L^-1[average concentration was (9.10±5.84) ng·L^-1] and MeHg concentration ranged from 0.09 ng·L^-1 to 0.84 ng·L^-1[average concentration was (0.34±0.08) ng·L^-1] in an outlet of wastewater treatment area. In the deep purification zone, the THg concentration ranged from 0.37 ng·L^-1 to 85.69 ng·L^-1[average concentration of (6.76±2.29) ng·L^-1] and the MeHg concentration ranged from 0.04 ng·L^-1 to 1.47 ng·L^-1[average concentration of (0.35±0.17) ng·L^-1]. The interference of human activities on mercury concentration is prominent. The vertical distribution of THg in the water is consistent with that of MeHg, the surface layer has lower values than the deep layer. Material balance suggested that THg in the wetland system decreases by 155.50 g per year, and MeHg decreases by 1.65 g per year, which has a protective effect on the downstream water.

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