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1. Effect of capacitive deionization on disinfection by-product precursors

Author:
Xie, Yuefeng F.,   et al.   ; Liu, Danyang; Wang, Xiaomao; Tang, Hao L.;     Show all 4 Authors
Source:
The Science of the total environment 2016 v.568 pp. 19-25
ISSN:
0048-9697
Subject:
adsorption; bromine; byproducts; chlorination; dichloroacetic acid; disinfection; dissolved organic carbon; drinking water; electric power; electrochemistry; humic acids; risk; saline water; water treatment
Abstract:
... Formation of brominated disinfection by-products (DBPs) from bromide and natural organic matter upon chlorination imposes health risks to drinking water users. In this study, capacitive deionization (CDI) was evaluated as a potential process for DBP precursor removal. Synthetic humic acid and bromide containing saline water was used as model water prior to CDI treatment. Batch experiments were con ...
DOI:
10.1016/j.scitotenv.2016.05.219

2. Characterization of haloacetaldehyde and trihalomethane formation potentials during drinking water treatment

Author:
Xie, Yuefeng F.,   et al.   ; Mao, Yu-qin; Wang, Xiao-mao; Guo, Xian-fen; Yang, Hong-wei;     Show all 5 Authors
Source:
Chemosphere 2016 v.159 pp. 378-384
ISSN:
0045-6535
Subject:
activated carbon; byproducts; chloral hydrate; chlorination; disinfection; filtration; ozonation; ozone; sand; water treatment
Abstract:
... Haloacetaldehydes (HAs) are the third prevalent group of disinfection by-products (DBPs) of great health concern. In this study, their formation and speciation during chlorination were investigated for raw and process waters collected at three O3-biological activated carbon (BAC) advanced drinking water treatment plants. The results showed that all HA formation potentials (HAFPs) were highly enhan ...
DOI:
10.1016/j.chemosphere.2016.05.088

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

Author:
Xie, Yuefeng F.,   et al.   ; Zhang, Shujuan; Wang, Xiaomao; Yang, Hongwei;     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

4. Evaluation of backwash strategies on biologically active carbon filters by using chloroacetic acids as indicator chemicals

Author:
Xie, Yuefeng F.,   et al.   ; Liu, Shi-ting; Yang, Hong-wei; Liu, Wen-jun; Zhao, Yu; Wang, Xiao-mao;     Show all 6 Authors
Source:
Process biochemistry 2016 v.51 no.7 pp. 886-894
ISSN:
1359-5113
Subject:
acids; adsorption; bacterial artificial chromosomes; biodegradation; biomass; carbon; drinking water; filters; organic matter; water treatment
Abstract:
... Disinfectant-enhanced backwash is frequently required to control the over-growth of biomass in biologically active carbon (BAC) filters for drinking water treatment. This study was conducted to investigate the impact of different backwashing strategies on the biodegradation and adsorption performance of BAC filters and attached biomass concentration in the filters. The biodegradation performance w ...
DOI:
10.1016/j.procbio.2016.03.016

5. Effects of metal ions on disinfection byproduct formation during chlorination of natural organic matter and surrogates

Author:
Xie, Yuefeng F.,   et al.   ; Zhao, Yu; Yang, Hong-wei; Liu, Shi-ting; Tang, Shun; Wang, Xiao-mao;     Show all 6 Authors
Source:
Chemosphere 2016 v.144 pp. 1074-1082
ISSN:
0045-6535
Subject:
organic matter; calcium; redox reactions; iron; chlorination; haloacetic acids; disinfection; catechol; citric acid; molecular weight; metal ions; chemical structure
Abstract:
... The effects of calcium, cupric, ferrous and ferric ions on the formation of trihalomethanes (THMs) and haloacetic acids (HAAs) were investigated using natural organic matter (NOM), small molecular weight NOM surrogates and natural water samples. The results showed that the effects were greatly dependent on the disinfection byproduct (DBP) precursor structure and molecular weight, and metal ions sp ...
DOI:
10.1016/j.chemosphere.2015.09.095

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

Author:
Xie, Yuefeng F.,   et al.   ; Qi, Shengqi; Mao, Yuqin; Lv, Miao; Sun, Lili; Wang, Xiaomao; Yang, Hongwei;     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

7. Assessment of the hindered transport model in predicting the rejection of trace organic compounds by nanofiltration

Author:
Xie, Yuefeng F.,   et al.   ; Kong, Fan-xin; Yang, Hong-wei; Wang, Xiao-mao;     Show all 4 Authors
Source:
Journal of membrane science 2016 v.498 pp. 57-66
ISSN:
0376-7388
Subject:
artificial membranes; chloramphenicol; ciprofloxacin; convection; drugs; glucose; haloacetic acids; hydrophobicity; mass transfer; models; molecular weight; nanofiltration; prediction; sodium chloride; solutes
Abstract:
... The DSPM&DE (Donnan steric pore model and dielectric exclusion) model was employed to predict the rejection of six haloacetic acids (HAAs) and six pharmaceuticals (PhACs), selected to have different molecular weight, hydrophobicity and charge, by two commercial nanofiltration (NF) membranes (HL and NF270). Increasing filtration pressures were applied to vary the rejection ratios. Glucose and NaCl ...
DOI:
10.1016/j.memsci.2015.09.062

8. Biologically active carbon filtration for haloacetic acid removal from swimming pool water

Author:
Xie, Yuefeng F.,   et al.   ; Tang, Hao L.;     Show all 2 Author
Source:
The Science of the total environment 2016 v.541 pp. 58-64
ISSN:
0048-9697
Subject:
bacterial artificial chromosomes; carbon; chlorine; dichloroacetic acid; filtration; regression analysis; swimming pools; trichloroacetic acid
Abstract:
... A biologically activate carbon (BAC) filter was continuously operated on site for the treatment of haloacetic acids (HAAs) in an outdoor swimming pool at an average empty bed contact time (EBCT) of 5.8min. Results showed that BAC filtration was a viable technology for direct removal of HAAs from the pool water with a nominal efficiency of 57.7% by the filter while the chlorine residuals were 1.71± ...
DOI:
10.1016/j.scitotenv.2015.09.059