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You searched for: Author "Yang, Hongwei" Remove constraint Author: "Yang, Hongwei" Journal Chemosphere Remove constraint Journal: Chemosphere
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1. Oxidation of isoprothiolane by ozone and chlorine: Reaction kinetics and mechanism

Author:
Yang, Hongwei,   et al.   ; Li, Yin; Wang, Xiaofeng; Wang, Xiaomao; Xie, Yuefeng;     Show all 5 Authors
Source:
Chemosphere 2019 v.232 pp. 516-525
ISSN:
0045-6535
Subject:
chemical bonding; chlorine; hydroxylation; isoprothiolane; liquid chromatography; malonic acid; oxidation; ozone; pH; reaction kinetics; river deltas; tandem mass spectrometry; water treatment
Abstract:
... Isoprothiolane (IPT) was one of the most commonly used pesticides around the world. It was reported to be the highest concentration and frequency of detection of 13 most commonly used pesticides in Mekong Delta recently. The oxidation degradation kinetic of ozone and chlorine with IPT and the identification of the degradation products was investigated in this research. The results showed that both ...
DOI:
10.1016/j.chemosphere.2019.03.179

2. Mechanism of ozonation enhanced formation of haloacetaldehydes during subsequent chlorination

Author:
Yang, Hongwei,   et al.   ; Mao, Yuqin; Qi, Shengqi; Zhao, Erzhuo; Xie, Yuefeng F.;     Show all 5 Authors
Source:
Chemosphere 2019 v.236 pp. 124361
ISSN:
0045-6535
Subject:
acetaldehyde; byproducts; catalytic activity; chlorination; chlorine; dehalogenation; disinfection; drinking water; hydrolysis; ozonation; pH
Abstract:
... Haloacetaldehydes (HAs) are the third prevalent group of disinfection by-products of great health concern. A bench-scale study was performed to investigate the formation and speciation of HAs in raw and treated waters after chlorination and ozonation-chlorination. Pre-ozonation resulted in enhanced HA formation during subsequent chlorination, and the HA yields from ozonation-chlorination were 1.66 ...
DOI:
10.1016/j.chemosphere.2019.124361

3. Comparison of chlorination behaviors between norfloxacin and ofloxacin: Reaction kinetics, oxidation products and reaction pathways

Author:
Yang, Hongwei,   et al.   ; Wang, Xiaofeng; Li, Yin; Li, Ruiyang; Zhou, Beihai; Wang, Xiaomao; Xie, Yuefeng;     Show all 7 Authors
Source:
Chemosphere 2019 v.215 pp. 124-132
ISSN:
0045-6535
Subject:
Lewis acids; Lewis bases; benzene; chemical bonding; chlorination; chlorine; hydrolysis; liquid chromatography; moieties; nitrogen; norfloxacin; ofloxacin; oxidation; reaction kinetics; reducing agents; tandem mass spectrometry; water treatment; China
Abstract:
... Fluoroquinolones (FQs) are very ubiquitous in water environment in China. The commonly application of free available chlorine (FAC) during water treatment stimulated the focus on the transformation of FQs during chlorination. Among these FQs, norfloxacin (NOR) and ofloxacin (OFL) are the representatives of secondary amine FQs and tertiary amine FQs, respectively. To better understand the differenc ...
DOI:
10.1016/j.chemosphere.2018.09.100

4. A comparison of genotoxicity change in reclaimed wastewater from different disinfection processes

Author:
Yang, Hongwei,   et al.   ; Chai, Qiwan; Hu, Allen; Qian, Yukun; Ao, Xiuwei; Liu, Wenjun; Xie, Yuefeng F.;     Show all 7 Authors
Source:
Chemosphere 2018 v.191 pp. 335-341
ISSN:
0045-6535
Subject:
byproducts; chlorine; chlorine dioxide; disinfectants; disinfection; effluents; genotoxicity; iodine; irradiation; mutagens; ozone; wastewater
Abstract:
... Effluents before disinfection from four wastewater reclamation plants were treated with chlorine (Cl2), ozone (O3), chlorine dioxide (ClO2), medium-pressure ultraviolet (MPUV) and four different combinations of the above, to evaluate the effect of disinfection processes on the genotoxicity removal by the SOS/umu test. Results showed that the genotoxicity increased after MPUV irradiation (10–100 mJ ...
DOI:
10.1016/j.chemosphere.2017.10.024

5. Chlorination of oxybenzone: Kinetics, transformation, disinfection byproducts formation, and genotoxicity changes

Author:
Yang, Hongwei,   et al.   ; Zhang, Shujuan; Wang, Xiaomao; Xie, Yuefeng F.;     Show all 4 Authors
Source:
Chemosphere 2016 v.154 pp. 521-527
ISSN:
0045-6535
Subject:
UV filters; byproducts; chloral hydrate; chlorination; chlorine; chloroform; dichloroacetic acid; disinfectants; disinfection; drinking water; genotoxicity; genotoxicity tests; mutagens; oxidation; trichloroacetic acid; water treatment
Abstract:
... UV filters are a kind of emerging contaminant, and their transformation behavior in water treatment processes has aroused great concern. In particular, toxic products might be produced during reaction with disinfectants during the disinfection process. As one of the most widely used UV filters, oxybenzone has received significant attention, because its transformation and toxicity changes during ch ...
DOI:
10.1016/j.chemosphere.2016.03.116

6. Effect of oxidation on nitro-based pharmaceutical degradation and trichloronitromethane formation

Author:
Yang, Hongwei,   et al.   ; Wang, Xiaofeng; Zhou, Beihai; Wang, Xiaomao; Xie, Yuefeng;     Show all 5 Authors
Source:
Chemosphere 2016 v.146 pp. 154-161
ISSN:
0045-6535
Subject:
chemical bonding; chlorination; chlorine; chlorine dioxide; chloropicrin; disinfection; drugs; models; oxidants; oxidation; oxygen; ozone; potassium permanganate
Abstract:
... Nitro-based compounds are the direct precursors of trichloronitromethane during chlorination disinfection. Two nitro-based pharmaceuticals ranitidine and nizatidine were selected as model compounds to assess the effect of oxidation on the removal of nitro-based pharmaceuticals, as well as the reduction of their trichloronitromethane formation potentials (TCNMFPs). The four oxidants were ozone (O3) ...
DOI:
10.1016/j.chemosphere.2015.11.014

7. Azo compound degradation kinetics and halonitromethane formation kinetics during chlorination

Author:
Yang, Hongwei,   et al.   ; Fu, Jing; Wang, Xiaomao; Bai, Weiliang; Xie, Yuefeng F.;     Show all 5 Authors
Source:
Chemosphere 2017 v.174 pp. 110-116
ISSN:
0045-6535
Subject:
chlorination; chlorine; chloropicrin; drinking water; genotoxicity; methyl orange; models; pH
Abstract:
... The chlorination of azo compounds can produce halonitromethanes (HNMs), which have attracted increasing concern due to their high genotoxicity. By impacting the speciation of chlorine and azo compounds, pH impacts apparent second-order rate constants of Methyl Orange (MO, 27.5–1.4 × 103 M−1 s−1), Acid Orange II (AO, 16.7–99.3 M−1 s−1), and Acid Red 1 (AR 1, 3.7–72.5 M−1 s−1) (pH range 6.3–9.0). Th ...
DOI:
10.1016/j.chemosphere.2017.01.098

8. Pathway fraction of bromate formation during O3 and O3/H2O2 processes in drinking water treatment

Author:
Yang, Hongwei,   et al.   ; Qi, Shengqi; Mao, Yuqin; Lv, Miao; Sun, Lili; Wang, Xiaomao; Xie, Yuefeng F.;     Show all 7 Authors
Source:
Chemosphere 2016 v.144 pp. 2436-2442
ISSN:
0045-6535
Subject:
hydrogen peroxide; oxidants; oxidation; ozone; surface water; water treatment; Yellow River
Abstract:
... Ozone process has been widely used for drinking water treatment recently. In the oxidation process, bromate is formed by three pathways, i.e., the direct pathway, the direct-indirect pathway and the indirect-direct pathway. This study developed a method to calculate the percentage of these three pathways for bromate formation during O3 process and O3/H2O2 process. Two kinds of water, distilled wat ...
DOI:
10.1016/j.chemosphere.2015.11.022

9. Effects of ozonation on disinfection byproduct formation and speciation during subsequent chlorination

Author:
Yang, Hongwei,   et al.   ; Mao, Yuqin; Wang, Xiaomao; Wang, Haoyu; Xie, Yuefeng F.;     Show all 5 Authors
Source:
Chemosphere 2014 v.117 pp. 515-520
ISSN:
0045-6535
Subject:
byproducts; chloral hydrate; chlorination; disinfectants; disinfection; ozonation; ozone; water treatment
Abstract:
... Ozone has been widely used for drinking water treatment recently. This study was conducted to investigate the effect of dosing ozone on the formation potentials and speciation of disinfection by-products (DBPs, brominated DBPs in particular) during subsequent chlorination. Trihalomethanes (THMs), trihaloacetic acids (THAAs), dihaloacetic acids (DHAAs), dihaloacetonitriles (DHANs), chloral hydrate ...
DOI:
10.1016/j.chemosphere.2014.08.083