The fate of mercury in municipal wastewater treatment plants in China: Significance and implications for environmental cycling.
作者： Yuxiang Mao , Liu Cheng , Bingjuan Ma , Yong Cai
DOI: 10.1016/J.JHAZMAT.2015.11.058
关键词:
摘要: Municipal wastewater treatment plants (WWTPs) play an important role in controlling pollutant discharges to surface waters. Previous studies suggested that the removal of mercury (Hg) by WWTPs was strongly correlated with solid removal. However, conclusions regarding possible transformations Hg species within were not consistent across those studies. We characterized total (THg) and methylmercury (MeHg) concentrations loads a WWTP located Jiaozuo, China, further understand fate WWTPs. THg MeHg primarily associated solids, both greater than 90%; sewage (2.0±2.7)×10(3)ng/L 7.5±5.8ng/L, respectively. A mass balance calculation revealed 80% input ended up sludge (SS), while more 70% influent degraded, indicating are sink for sewage-borne Hg. SS (3.9±1.4)×10(3)ng/g 6.3±2.3ng/g, respectively, suggesting could be significant source environment if handled properly. The significance biogeochemical cycling China is discussed.
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