外源硫输入对城市水体黑臭化的诱导效应  

Induced Effect of Exogenous Sulfur Input on Blackening and Odorization of Urban River

作　　者：齐梓漩 常素云[2] 向阳 王松庆[2] 孙井梅[1] QI Zi‑xuan;CHANG Su‑yun;XIANG Yang;WANG Song‑qing;SUN Jing‑mei(School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China;Tianjin Water Conservancy Science Research Institute,Tianjin 300061,China)

机构地区：[1]天津大学环境科学与工程学院,天津300350 [2]天津市水利科学研究院,天津300061

出　　处：《中国给水排水》2024年第7期6-12,共7页China Water & Wastewater

基　　金：国家自然科学基金资助项目(52270162);住房和城乡建设部研究开发项目(2022-K-166)。

摘　　要：基于雨水管网实际污染情况,分别向水中输入S^(2-)及SO_(4)^(2-)进行模拟实验,通过分析上覆水和底泥中氮、硫等污染物赋存及变化,探究外源硫及其与有机碳源耦合对水体黑臭化的诱导效应。结果表明,输入S^(2-)(1~10 mg/L)后第12天,各组上覆水的NH3-N、S^(2-)和底泥酸性挥发性硫(AVS)均有积累并出现黑臭,且输入的S^(2-)量越大,积累越多,黑臭越重。S^(2-)耦合有机碳源(TOC为100 mg/L)通过迅速消耗DO显著增加水中S^(2-)和底泥AVS,加速、加重水体黑臭。输入SO_(4)^(2-)(50~300 mg/L)后水中未出现黑色物质,但SO_(4)^(2-)≥100 mg/L时会诱导底泥释放NH3-N,引发富营养化并间接导致黑臭。SO_(4)^(2-)耦合有机碳源可诱导间隙水SO_(4)^(2-)积累并转化为S^(2-)向上覆水释放,同时诱导底泥AVS向其他形态硫转化,增加水体返黑返臭隐患。以上结果可为华北某市含有大量有机污染物的管网水排入SO_(4)^(2-)背景值较高水体的返黑返臭防治提供参考。Based on the actual pollution of the stormwater drainage,S^(2-)and SO2-4 were input into the water for simulation experiments.Through the occurrence and change of nitrogen,sulfur and other pollutants in the overlying water and sediment,the induced effect of exogenous sulfur and its coupling with organic carbon on blackening and odorization of river was explored.The results showed that the NH3-N,S^(2-)in the overlying water and AVS in the sediment of each group accumulated and appeared black and odorous on the 12 d after the input of S^(2-)(1-10 mg/L).And the higher the dosage,the more accumulation and the heavier the black and odorous.S^(2-)coupling organic carbon(TOC=100 mg/L)significantly increased S^(2-)in the overlying water and AVS in the sediment by rapidly consuming DO,accelerating and aggravating the black and odorous.After SO_(4)^(2-)(50-300 mg/L)was input,there was no black matter in the water,but when it was greater than or equal to 100 mg/L,it would induce the sediment to release NH3-N,cause eutrophication and indirectly lead to black and odorous.The SO_(4)^(2-)coupling organic carbon could induce the accumulation of SO_(4)^(2-)in interstitial water and convert it into S^(2-)to release to the overlying water.In addition,it could induce the conversion of AVS in sediment to other forms of sulfur,and increased the hidden danger of repeated black and odorous.The above results can provide a reference for the prevention and control of repeated black and odorous,when the stormwater drainage water containing a large amount of organic pollutants discharged into the river with a high background value of SO_(4)^(2-).

关 键 词：黑臭水体 外源硫 有机碳源 诱导效应 

分 类 号：TU992[建筑科学—市政工程]