Screening of 1300 organic micro-pollutants in groundwater from Beijing and Tianjin, North China

Kong, Lisheng; Kadokami, Kiwao; Duong, Hanh Thi; Chau, Hong Thi Cam

doi:10.1016/j.chemosphere.2016.08.084

Cited by 70 publications

(25 citation statements)

References 30 publications

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“…The highest concentration of DMP detected was 1.179 mg kg −1 , in vegetable fields with plastic film mulching in Shandong Peninsula, East China, which exceeded the recommended allowable concentration 0.02 mg kg −1 (Department of Environmental Conservation, 1994) . The detection of 64 ng L −1 of DMP in groundwater was also reported . Microbial biodegradation is the major route to remove DMP from environment .…”

Section: Introductionmentioning

confidence: 86%

Complete degradation of dimethyl phthalate by a Comamonas testosterone strain

Luo

Chu

et al. 2017

J Basic Microbiol

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A Comamonas testosterone bacterial strain, named as DB-7, capable of utilizing dimethyl phthalate (DMP) as sole carbon source and energy for growth was isolated from soil with plastic film mulching by an enrichment culture technique. This bacterium was identified as C. testosterone by 16S rRNA sequence analysis and phospholipid fatty acid profile. DB-7 could degrade more than 99% of 450 mg L DMP within 14 hours, and degraded DMP of different concentrations rapidly. The optimal degradation temperature and pH were 30-35 °C and pH 9.0, respectively. The degradation rate of DMP was positively related to inoculum volume of the bacterium. The result of HPLC and LC/MS analysis of metabolic products indicated that the major degrading intermediates were mono-methyl phthalate (MMP) and phthalic acid (PA) during the degradation of DMP by DB-7. Partial sequences of three genes involved in PA metabolism were detected in DB-7, and the expression of phthalate 4, 5-dioxygenase was drastically induced in the presence of DMP and PA. DB-7 is promising to be applied to DMP bioremediation because of its high degrading efficiency.

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Section: Introductionmentioning

confidence: 86%

Complete degradation of dimethyl phthalate by a Comamonas testosterone strain

Luo

Chu

et al. 2017

J Basic Microbiol

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“…BHT is a toluene-based ingredient used as a preservative in food and personal care products. 2-PE is a bactericide often used in dermatological products, such as skin creams and sunscreens; and also, as fixative for perfumes, insecticide and topical antiseptic and has been found in surface waters at concentrations up to 14 µg/L (13) and 129 ng/L in groundwater (14). Previous investigations have shown relatively high concentrations of the studied CEC in the range up to 0.1-40 µg/L, which indicates the necessity to apply appropriate water treatments for their removal from drinking water sources.…”

Section: Groundwater Characteristicsmentioning

confidence: 99%

“…Population growth is in direct correlation with the lower availability of water sources, as quality deteriorates due to land use and climate changes, hydrology and water quality changes (1). An important series of new contaminants are of particular concern, the emerging (or micro-) pollutants (2), with varied concentrations (ranging from ng/L to mg/L) whose transformation through drinking water treatment processes can lead to compounds which may be more UDC: 582.998.2+581.48]:544.77.054.6:621.928 DOI: https://doi.org/10.2298/APT2051009M BIBLID: 1450-7188 (2020) 51, [9][10][11][12][13][14][15] Original scientific paper 10 toxic, persistent and less biodegradable than their predecessors. The NORMAN network was created to keep track of such contaminants and maintains a list of substances detected in European aquatic environments, but which are not currently included in routine environmental monitoring programs.…”

Section: Introductionmentioning

confidence: 99%

Removal of natural organic matter and emerging contaminants from groundwater using ozonation and GAC filtration

et al. 2020

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This work presents results from a pilot-scale drinking water treatment plant used to investigate the performance of ozone oxidation and granulated activated carbon (GAC) adsorption in removing natural organic matter (NOM) and specific organic micropollutants from groundwater. The investigated groundwater has a relatively low NOM content (1.83?1.01 mg C/L total organic carbon, TOC). Using gas chromatography/mass spectrometry (GC/MS) screening analysis, a variety of different organic compounds were identified, including benzophenone, 2-phenoxyethanol, butylated hydroxytoluene and benzoic acid, all contaminants of emerging concern (CEC) identified by NORMAN. The application of the ozonation process resulted in a 4-20% NOM reduction, based on the TOC values. Estimated removal of CECs by ozone increased with increasing ozone dose (up to 1.0 g O3/m3) and was in the range 24-70%. Adsorption on GAC further improves total NOM and CECs removal compared to the ozonation alone. Combined use of ozone and GAC provides up to 16-33% TOC reduction as well as 70-82% CECs removal. UV absorbance values at 254 nm can serve as an indicator of aromatic carbon content in water, and were significantly reduced after ozonation and GAC filtration (by up to 50%). Among the CECs investigated, benzophenone was the most prone to oxidation/adsorption treatment. In addition to the naturally present organic matter, CECs detected can serve as indicators of anthropogenic pollution which may alter drinking water quality. Tracking their behaviour during treatment allows assessment of the efficiency of the technological line and optimization of the oxidation process in the case of groundwater pollution by infiltration.

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“…Resulting mainly from human activity, various organic compounds, called "contaminants or pollutants of emerging concern", are being detected in several environmental matrices, such as in effluent from a wastewater treatment plant [1], surface waters [2][3][4], drinking waters [5,6] and groundwaters [4,7,8].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Caffeine by Heterogeneous Photocatalysis Using ZnO with Fe and Ag

Almeida

Pietrobelli

Lenzi

et al. 2020

Braz. arch. biol. technol.

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The organic compound caffeine when detected in environmental matrices such as surface waters and groundwater is considered as an emerging contaminant, in which its effects are still unknown. Therefore, in the present research, zinc oxide-based catalysts impregnated with iron and silver were prepared for the reaction of caffeine degradation by heterogeneous photocatalysis. The wet impregnation method with excess solvent was applied to the preparation of the materials, later they were characterized by adsorption of N2, Xray diffraction and photoacoustic spectroscopy. Then, the photodegradation, photolysis and adsorption tests were carried out, in which it was observed that only the presence of the radiation or photocatalysts could not sufficiently degrade the caffeine, however when combined radiation with all the catalysts studied here presented degradation above 70% at the end of 300 minutes of the reaction, and the best catalyst studied was that containing 8% Ag in non-calcined ZnO. Thus, these results point out that the methodology employed in this research, both for the preparation of the catalysts and in the process of the photocatalysis reaction, was efficient in the degradation of the emerging contaminant, caffeine, which could later be used for a mixture of other contaminants.

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Screening of 1300 organic micro-pollutants in groundwater from Beijing and Tianjin, North China

Cited by 70 publications

References 30 publications

Complete degradation of dimethyl phthalate by a Comamonas testosterone strain

Complete degradation of dimethyl phthalate by a Comamonas testosterone strain

Removal of natural organic matter and emerging contaminants from groundwater using ozonation and GAC filtration

Degradation of Caffeine by Heterogeneous Photocatalysis Using ZnO with Fe and Ag

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