INFLUENCE OF RESIDUAL NANOPARTICLES IN MUNICIPAL SEWAGE ON FORMATION OF CHLORINATION DISINFECTION BY-PRODUCTS

SU Hao; FENG Li; ZHANG Liqiu

doi:10.13205/j.hjgc.202308005

Volume 41 Issue 8

Aug. 2023

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SU Hao, FENG Li, ZHANG Liqiu. INFLUENCE OF RESIDUAL NANOPARTICLES IN MUNICIPAL SEWAGE ON FORMATION OF CHLORINATION DISINFECTION BY-PRODUCTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 33-40. doi: 10.13205/j.hjgc.202308005

Citation:

SU Hao, FENG Li, ZHANG Liqiu. INFLUENCE OF RESIDUAL NANOPARTICLES IN MUNICIPAL SEWAGE ON FORMATION OF CHLORINATION DISINFECTION BY-PRODUCTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 33-40. doi: 10.13205/j.hjgc.202308005

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INFLUENCE OF RESIDUAL NANOPARTICLES IN MUNICIPAL SEWAGE ON FORMATION OF CHLORINATION DISINFECTION BY-PRODUCTS

doi: 10.13205/j.hjgc.202308005

College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China

Received Date: 2022-08-19
Available Online: 2023-11-15

Abstract

Abstract

In this study, in order to clarify the influence of frequent exposure of nanoparticles (NPs) in wastewater plants on disinfection by-products (DBPs) generation, the secondary effluent was used as the substrate to investigate the effect of NP_S concentration on DBPs generation in the chlorination disinfection and UV/chlorination disinfection process. Additionally, the complexation of NPs with residual organic matter (EfOM) in secondary effluent was analyzed by 3D-EEM and UV-vis differential spectra. The results showed that the content of UV₂₅₄ and SUVA in secondary effluent decreased by the presence of three NPs, and the Zeta potential, fluorescence intensity and UV absorbance were decreased by hydrophobic complexation of EfOM. When the concentration of NPs (nTiO₂, nAg, NZVI) was all 500 μg/L, In the process of chlorine disinfection, the reduction of chloroform (TCM), dichloroacetonitrile (DCAN) and bromodichloromethane (BDCM) was about 2 to 5 times that of NP_S at 10 μg/L. In the process of UV/chlorine disinfection, the generation of TCM and DCAN increased by 2.18 and 1.53 μg/L respectively in the presence of nAg, but the effect of nAg on the generation of BDCM was not obvious; the generation of TCM, DCAN and BDCM was reduced by 4.09,2.02,2.15 μg/L, respectively, in the presence of nTiO₂; The generation of TCM, DCAN and BDCM was reduced by 2.36,1.3,1.16 μg/L, respectively, in the presence of NZVI. This study investigates the impact of residual NPs from wastewater treatment plants on the mechanism of DBP formation, providing data support for the safe operation of such facilities.
- secondary effluent,
- disinfection by-products,
- nanoparticles,
- chlorination disinfection,
- UV/chlorination disinfection

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References(35)

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