复合人工湿地系统对二级出水中汞的去除效果  

Performance of Hybrid Constructed Wetland for Mercury Removal in Effluent from the Secondary Biological Treatment System

作　　者：程涵宇 刘汉湖[2] 蒋雪阳 栾慧君 姜斌 陈善成[1,3] CHENG Han-yu;LIU Han-hu;JIANG Xue-yang;LUAN Hui-jun;JIANG Bin;CHEN Shan-cheng(Exploration Research Institute,Anhui Provincial Bureau of Geology,Hefei 230088,China;School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Green Mining Engineering Research Center of Anhui Province,Hefei 230088,China;Lianyungang Economic and Technological Development Area Administration Committee,Lianyungang 222068,China;Supply&Drainage Corporation in Xuecheng District,Zaozhuang City,Zaozhuang 277000,China)

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088 [2]中国矿业大学环境与测绘学院,江苏徐州221116 [3]安徽省绿色矿山工程研究中心,安徽合肥230088 [4]连云港经济技术开发区管理委员会,江苏连云港222068 [5]枣庄市薛城区城市供排水总公司,山东枣庄277000

出　　处：《中国给水排水》2023年第7期120-125,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51774270);安徽省博士后基金资助项目(2019B335)。

摘　　要：为了分析薛城污水处理厂复合人工湿地系统(水平潜流+表面流)对二级出水中汞的去除效果,对水体中总汞、溶解态汞、颗粒态汞和水体理化性质等指标进行了测定。结果表明,薛城复合人工湿地系统对汞的去除效果受温度、溶解氧、pH的影响;5月份系统对总汞的去除率为96.47%,表面流人工湿地去除率大于水平潜流人工湿地;9月份系统对总汞的去除率为97.58%,水平潜流人工湿地去除率大于表面流人工湿地。复合人工湿地系统出水中总汞浓度为1.90~3.59 ng/L,符合《地表水环境质量标准》(GB 3838—2002)Ⅰ类水中汞浓度不超过50 ng/L的要求。可见,薛城复合人工湿地系统能够有效去除外源汞,该系统对于保障南水北调东线水质安全具有重要生态价值。The total mercury,dissolved mercury,particulate mercury and physicochemical indexes of effluent from the secondary biological treatment system of Xuecheng Wastewater Treatment Plant was tested to investigate the performance of hybrid constructed wetland system(horizontal subsurface flow constructed wetland and surface flow constructed wetland)for mercury removal.The mercury removal performance of the hybrid constructed wetland system was affected by temperature,dissolved oxygen and pH.The removal rate of total mercury was 96.47%in May,and the removal rate of surface flow constructed wetland was higher than that of horizontal subsurface flow constructed wetland.In September,the removal rate of total mercury was 97.58%,and the removal rate of horizontal subsurface flow constructed wetland was higher than that of surface flow constructed wetland.The total mercury concentration in effluent from the hybrid constructed wetland system was 1.90-3.59 ng/L,which met the requirement of Environmental Quality Standards for Surface Water(GB 3838-2002)classⅠlimit(no more than 50 ng/L).In conclusion,the hybrid constructed wetland system in Xuecheng can effectively remove exogenous mercury,which has important ecological value for ensuring the water quality safety of the eastern route of the South-to-North Water Diversion Project.

关 键 词：复合人工湿地 水平潜流人工湿地 表面流人工湿地 汞 二级出水 

分 类 号：TU992[建筑科学—市政工程]