QIZi-xuan,CHANGSu-yun,XIANGYang,et al.Induced Effect of Exogenous Sulfur Input on Blackening and Odorization of Urban River[J].China Water & Wastewater,2024,40(7):6-12.
Click Copy

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

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第7期 Page: 6-12 Column: Date of publication: 2024-04-01
Author(s):
QI　Zi-xuan1;  CHANG　Su-yun2;  XIANG　Yang1;  WANG　Song-qing2;  SUN　Jing-mei1
（1. School of Environmental Science and Engineering， Tianjin University， Tianjin 300350， China； 2. Tianjin Water Conservancy Science Research Institute， Tianjin 300061， China）
Keywords:
black and odorous river;  exogenous sulfur;  organic carbon;  induced effect
Abstract:
Based on the actual pollution of the stormwater drainage, S2-and SO42- 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, S2- 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 S2- (1-10 mg/L). And the higher the dosage, the more accumulation and the heavier the black and odorous. S2- coupling organic carbon (TOC=100 mg/L) significantly increased S2- in the overlying water and AVS in the sediment by rapidly consuming DO, accelerating and aggravating the black and odorous. After SO42- (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 SO42- coupling organic carbon could induce the accumulation of SO42- in interstitial water and convert it into S2- 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 SO42-.
Last Update: 2024-04-01