Trihalomethanes (THMs) precursor fractions removal by coagulation and adsorption for bio-treated municipal wastewater: Molecular weight, hydrophobicity/hydrophily and fluorescence

Han, Qi; Yan, Han; Zhang, Feng; Xue, Nan; Wang, Yan; Chu, Yongbao; Gao, Baoyu

doi:10.1016/j.jhazmat.2015.04.070

Cited by 81 publications

(24 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The decrease in Peak A of coagulated water corresponded well to the reduction of larger molecular weight by charge neutralization and bridge action, while the remaining compound presented a low conjugated bond of Peak A that could not be removed through those mechanism (Han et al 2015). According to Fig.…”

Section: Nom Fractions Removal By Coagulationmentioning

confidence: 70%

“…Disinfection by-products (DBPs), of which trihalomethanes (THMs) and haloacetic acids (HAAs) are the major groups, were formed when NOM reacts with a disinfectant such as chlorine. The varying leves of DBPs formation are dependent upon the reactivity of the NOM, chlorine dose, pH, temperature, reaction time, and bromide concentration (Roccaro et al 2008;Han et al 2015). Therefore, the removal of dissolved organic in drinking water treatment is important for controlling disinfection by-products (DBPs) formation and for preventing water quality deterioration in distribution system caused by biofilm formation.…”

Section: Introductionmentioning

confidence: 99%

“…It is considered to be the more important source of DBPs precursors than hydrophilic. However, hydrophilic compounds are also found to contribute in the formation of DBPs, especially in low humic waters (Hua and Reckhow 2007;Han et al 2015).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization and removal of natural organic matter from slow sand filter effluent followed by alum coagulation

2018

View full text Add to dashboard Cite

Characterization and removal of natural organic matter, which is contained in the effluent of slowsand filters, was observed by alum coagulation under various dosages. In addition to non-purgedable dissolved organic carbon (NPDOC), trihalomethanes formation potential (THMFP) and haloacetic acid formation potential (HAAFP) measurement, high-performance sizeexclusion chromatography (HPSEC) with ultraviolet/visible and dissolved organic carbon (DOC) detectors was used to characterize the various organic fractions contained in the water before and after coagulation. The results show that alum coagulation could effectively remove hydrophobic aromatic, which forms mainly humic substances. The reduction in THMFP was found to be higher than that of NPDOC and HAAFP under specific alum dosage, and the former was also found to be proportional to the corresponding reduction in the area of hydrophobic aromatic fraction, mostly humic subtances, as obtained from HPSEC chromatogram with peak-fitting.

show abstract

Section: Nom Fractions Removal By Coagulationmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization and removal of natural organic matter from slow sand filter effluent followed by alum coagulation

2018

View full text Add to dashboard Cite

show abstract

“…Quantitatively, the removal efficiency of 30-100 kDa fraction was observed to be 4.1% for UV 254 and 20.5% for DOC, and that of 10-30 kDa fraction was determined to be 2.8% for UV 254 and 5.6% for DOC. These results demonstrated that aluminum coagulation showed different removal behaviors towards the IOM with different MW.pH had significant effect on the removal of the organics with different MW, and the organics with lower MW was more difficult to be removed by coagulation [43]. The removal of >100 kDa fraction was consistently high in wide pH range from 4.5 to 9.5.…”

Section: Removal Behaviors Of Iom With Different Mw By Aluminum Coagumentioning

confidence: 83%

Enhanced removal of intracellular organic matters (IOM) from Microcystic aeruginosa by aluminum coagulation

Guo

Yang

Liu

et al. 2017

Separation and Purification Technology

View full text Add to dashboard Cite

a b s t r a c tAlgal organic matter (AOM), especially intracellular organic matter (IOM), increases the levels of color and taste & odor, and promotes the formation of disinfection by-products (DBPs). This study isolated the IOM from Microcystis aeruginosa into the fractions with different molecular weight (MW), i.e., >100 kDa, 30-100 kDa, 10-30 kDa, and 3-10 kDa, and characterized them by techniques of dissolved organic carbon (DOC), UV absorbance and Excitation-emission matrix (EEM) fluorescence spectroscopy. After that, the removal efficiency of these IOM fractions by aluminum sulfate (Al 2 (SO 4 ) 3 , alum) at different Al doses and pH were compared. The removal efficiency of IOM, as indicated by DOC, UV 254 , and OD 680 , increased consistently with higher Al doses, and the maximum removal was determined to be 99.7% for OD 680 , 51.4% for UV 254 , and 38.7% for DOC by alum at 5 mg/L. pH also showed effects, and the maximum removal was achieved at pH 6.5 with the maximum removal of 42.3% for DOC and 61.5% for UV 254 . The higher UV 254 removal as compared to that of DOC indicated the superiority of alum to remove the aromatic IOM species. EEM spectra indicated the higher protein content within these IOM fractions, and the formation of complexes between Al and proteins involved in their removal. IOM with higher MW showed more significant removal of both DOC and UV 254 than that with lower MW, and the sweep flocculation mechanism played an important role. Alum coagulation is effective and available for IOM removal in case of algae bloom and minimize its adverse effects on water safety thereafter.

show abstract

“…The wastewater containing harmful organic compositions are generally called organic wastewater which is discharged from industry and the domestic living waste [8,9]. Anaerobic and aerobic bioreactors [10,11] are commonly used to treat wastewater by converting the containing organic compositions into biogas including CO2 and fuel of H2 and CH4 [12,13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Organic Polymerization in Treating Waste Water by Electrolysis

Nong¹,

Jiang²,

Wang³

2017

Proceedings of the 3rd International Conference on Wireless Communication and Sensor Networks (WCSN 2016)

View full text Add to dashboard Cite

Abstract-Treating wastewater by bio-reactors combined with electrolytic cells gets better efficiencies in practices. Beside removal of pollutants by electro-oxidation reactions, organic polymerization is considered as another mechanism contributing to remove pollutants in treating wastewater by electrolysis. Therefore, an investigation of organic polymerization in wastewater by electrolysis is carried out in this paper. The common organic substrates of methanol, ethanol and glycol in water can be polymerized by electrolysis. Polymer precipitation contributes to removing 36.9 % and 86.38 % of COD of pulping wastewater and black liquor, respectively. The results indicate that organic polymerization plays an important role in pollutants reduction in treating wastewater by electrolysis.

show abstract

Trihalomethanes (THMs) precursor fractions removal by coagulation and adsorption for bio-treated municipal wastewater: Molecular weight, hydrophobicity/hydrophily and fluorescence

Cited by 81 publications

References 49 publications

Characterization and removal of natural organic matter from slow sand filter effluent followed by alum coagulation

Characterization and removal of natural organic matter from slow sand filter effluent followed by alum coagulation

Enhanced removal of intracellular organic matters (IOM) from Microcystic aeruginosa by aluminum coagulation

Investigation of Organic Polymerization in Treating Waste Water by Electrolysis

Contact Info

Product

Resources

About