Occurrence and fate of emerging contaminants in municipal wastewater treatment plants from different geographical regions-a review

Trần, Ngọc Hân; Reinhard, Martin; Gin, Karina Yew-Hoong

doi:10.1016/j.watres.2017.12.029

Cited by 1,296 publications

(529 citation statements)

References 244 publications

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“…Rindone and Nakano et al,, found that the main product of the gas‐phase hydrogen abstraction reaction of phenol with NO 3 or OH is phenoxy radical, then phenoxy radical can react with the NO 2 to form 2‐NP and 4‐NP, and the formation rate of 2‐NP is faster than that of 4‐NP. Although Wang et al realized the phenoxy radical can react with NO 2 , he did not elaborate on the detail of the formation.…”

Section: Resultsmentioning

confidence: 99%

“…The phenolic compounds including aminophenol, methylaminophenoland dihydroxybenzene are considered as environment pollutants, which have high toxicity causing dermal irritation and allergic reactions . Moreover, the phenolic compounds in the aquatic environment can cause the undesirable effects on ecosystem and human health ,. The mechanisms of the hydrogen abstraction reaction between the mono‐substituted phenols and nitrogen dioxide in 298 K were investigated by Tao et al, but the dynamics remain unknown up to now.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical study on the formation mechanisms, dynamics and the effective catalysis of the nitrophenols

Jia

Bai

et al. 2018

ChemistrySelect

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The hydrogen abstraction reactions of mono‐substituted phenols and nitrogen dioxide may be the sources of HONO and phenoxy radical. Further addition reaction of NO2 and phenoxy radical can form 2‐nitrophenol (2‐NP) and 4‐nitrophenol (4‐NP). The specific formation mechanisms and dynamics of NPs have drawn significant attention in recent days. The promoted reaction mechanisms by water, phenol and intermediate have also been studied. Compared with the naked reaction, the catalytic pathways can reduce the energy barrier from 48.40 kcal/mol to 18.23, 23.03 and 18.87 kcal/mol to form 2‐NP, respectively. Water molecules are the most effective catalysts, and the energy barrier could be further reduced to 8.20 kcal/mol when three water molecules are participating in the reaction. Water molecules can not only promote the formation of 4‐NP, but also simplify the reaction steps. In general, the water molecules serve as catalysts in the formation of NPs. The rate constants of 2‐NP and its hydrates have been predicted. The results are listed as follows: k2‐NP =3.82×10−13; k2‐NP‐1W =2.43×10−7; k2‐NP‐2W =3.39×10−4 cm3molecule−1s−1. The rate constants of mono‐substituted phenols (methylamino phenol, aminophenol and hydroquinone) and NO2 are also predicted by the traditional transitional state theory and variational transition state theory using the B3LYP/6‐311++G(3df,3pd)//6‐311++G(d). For the most dominant path, the rate constants for o/m/p‐methylaminophenol are 1.91×10−14, 4.28×10−20 and 8.78×10−15 cm3molecule−1s−1, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical study on the formation mechanisms, dynamics and the effective catalysis of the nitrophenols

Jia

Bai

et al. 2018

ChemistrySelect

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“…As pharmaceutical compounds, antibiotics have been used widely in hospitals, agriculture, livestock and aquaculture for a long time (Vera and Lúcia, 2011, Le et al 2018, Tran et al 2018. It is believed that continuous, improper and high usage of antibiotics have contributed to the evolution and development of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in various receiving environments (Brown et al 2006, Laxminarayan et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Silicon dioxide nanoparticles have contrasting effects on the temporal dynamics of sulfonamide and β-lactam resistance genes in soils amended with antibiotics

Zhang

et al. 2020

Environ. Res. Lett.

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Nanoparticles (NPs) and antibiotic resistant genes (ARGs), as emerging environmental contaminants, have been reported to be accumulated in the soil environment. The use of NPs have raised increasing concerns about their environmental impacts, but the combined effect of NPs and antibiotics on ARGs remains less understood. Here, we established laboratory microcosms to explore the impacts of different concentrations of SiO 2 NPs on β-lactam and sulfonamide resistance genes in soils amended with β-lactam or sulfonamide. Illumina sequencing and quantitative PCR revealed that the addition of NPs increased the bacterial community diversity but had no significant effects on the bacterial abundance. Moreover, NPs and sulfonamide jointly increased the abundances of sulfonamide resistance genes, while the exposure of NPs and β-lactam decreased β-lactam resistance genes. The detected ARGs were associated closely with two mobile genetic elements (MGEs, the tnpA and intI1 genes), indicating that MGEs may contribute to the dissemination of ARGs. Correlation analysis indicated the shifts in potential bacterial hosts and the frequency of horizontal gene transfer were important factors explaining the patterns of ARGs. Furthermore, structural equation models indicated that NPs exposure decreased the abundances of β-lactam resistance genes by driving changes in bacterial community and MGEs, whereas the increased abundances of sulfonamide resistance genes were mainly associated with the bacterial community, diversity and MGEs mediated by NPs and antibiotics. These results suggested that the combined effects of NPs and antibiotics on soil bacterial resistance were different due to the types of antibiotics.

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“…In past decades, the widespread occurrence of micro-organic pollutants (MPs) has been documented in the aquatic environment, such as endocrine disrupting compounds (EDCs) and pharmaceutical and personal care products (PPCPs) [7][8][9][10][11]. The presence of EDCs and PPCPs in the aquatic environment has received great attention because of their potential adverse effects on aquatic ecosystems and human health [12,13]. Various engineering techniques, such as bioprocesses, coagulation, filtration, and disinfection, are often applied to produce reclaimed water and have been reported to be inefficient for the removal of EDCs and PPCPs [4,12,14].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of EDCs and PPCPs in the aquatic environment has received great attention because of their potential adverse effects on aquatic ecosystems and human health [12,13]. Various engineering techniques, such as bioprocesses, coagulation, filtration, and disinfection, are often applied to produce reclaimed water and have been reported to be inefficient for the removal of EDCs and PPCPs [4,12,14]. A study of 9 PPCPs and 5 EDCs from 12 cities in northern China showed that all the PPCPs and EDCs were found in reclaimed water, with a maximum concentration of 470.8 ng/L [15].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Micropollutants by UV–Chlorine Treatment in Reclaimed Water: pH Effects, Formation of Disinfectant Byproducts, and Toxicity Assay

Wang

Ying

Минг

et al. 2019

Water

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The utilization of reclaimed water is a reliable and sustainable approach to enhance water supply in water-deficient cities. However, the presence of micro-organic pollutants (MPs) in reclaimed water has potential adverse effects on aquatic ecosystems and human health. In this study, we investigated the occurrence of 12 target MPs in the influent and reclaimed water collected from a local wastewater treatment plant, and the ultraviolet (UV)-chlorine process was applied to analyze its ability to remove MPs. The results showed that all 12 MPs were detected in both the influent and the reclaimed water, with the concentrations ranging from 25.5 to 238 ng/L and 8.6 to 42.5 ng/L, respectively. Over 52% of all the target MPs were readily degraded by the UV-chlorine process, and the removal efficiency was 7.7% to 64.2% higher than the corresponding removal efficiency by chlorination or UV irradiation only. The degradation efficiency increased with the increasing initial chlorine concentration. The pH value had a slight influence on the MP degradation and exhibited different trends for different MPs. The formation of known disinfectant byproducts (DBPs) during the UV-chlorine process was 33.8% to 68.4% of that in the chlorination process, but the DBPs' formation potentials were 1.3 to 2.2 times higher. The toxicity assay indicated that UV-chlorine can effectively reduce the toxicity of reclaimed water.

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Occurrence and fate of emerging contaminants in municipal wastewater treatment plants from different geographical regions-a review

Cited by 1,296 publications

References 244 publications

Theoretical study on the formation mechanisms, dynamics and the effective catalysis of the nitrophenols

Theoretical study on the formation mechanisms, dynamics and the effective catalysis of the nitrophenols

Silicon dioxide nanoparticles have contrasting effects on the temporal dynamics of sulfonamide and β-lactam resistance genes in soils amended with antibiotics

Degradation of Micropollutants by UV–Chlorine Treatment in Reclaimed Water: pH Effects, Formation of Disinfectant Byproducts, and Toxicity Assay

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