Mercury speciation transformation in sewage of the sewage treatment process

In order to reveal the occurrence characteristics and speciation transformation of mercury in the sewage treatment plant, the sewage of each process unit in Mai dao sewage treatment plant was taken as the research object, the total mercury (THg), particulate mercury (PHg) and dissolved mercury (DHg)...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2021-05, Vol.770 (1), p.12069
Main Authors: Li, Yunpeng, Wang, Yan, Liu, Ruhai, Shao, Long, Liu, Xiaoyu, Han, Kun
Format: Article
Language:English
Subjects:
Biological activity
Biological treatment
Genetic transformation
Influent water
Mercury
Mercury (metal)
Raw sewage
Sewage disposal
Sewage treatment plants
Speciation
Wastewater
Wastewater treatment plants
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Summary:In order to reveal the occurrence characteristics and speciation transformation of mercury in the sewage treatment plant, the sewage of each process unit in Mai dao sewage treatment plant was taken as the research object, the total mercury (THg), particulate mercury (PHg) and dissolved mercury (DHg) in the samples was determined for 7 consecutive days. The results showed that the THg in influent water was 474.6±148.4ng/L, and had a large daily variance, and that in effluent was 27.8±8.2 ng/L. THg in wastewater was closely related to the degree of organic pollution. PHg accounted for a larger proportion in raw sewage (PHg/THg was 73.5%), and the proportion of DHg increased after treatment. The total removal efficiency of THg was 94.1%, and PHg contributed a lot. The removal of mercury mainly occurred in the secondary biological treatment process.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/770/1/012069