Tag Archives: emerging contaminants

Organophosphorus flame retardants in drinking water, Nanjing, China

Liu X, Xiong L, Li D, Chen C, Cao Q. Monitoring and exposure assessment of organophosphorus flame retardants in source and drinking water, Nanjing, China. Environ Monit Assess. 2019 Jan 31;191(2):119. doi: 10.1007/s10661-019-7239-0.

This study developed a new method to determine the residues of 13 organophosphorus flame retardants (OPFRs) in drinking water by gas chromatography-tandem mass spectrometry (GC-MS/MS) technique and investigated the chemical distribution in water samples from municipal plants along the Yangtze River in Nanjing. The linear calibration correlation coefficients R2 for all 13 OPFRs were at least 0.998 0. Three levels of spiked test were performed. Most of the recoveries were in the range of 80~120%, and the relative standard deviations (RSDs) for the 13 OPFRs were 2.1~17% (n = 6). Five OPFRs were 100% positively detected in the samples, and 3 OPFRs were positively detected in some samples. The concentrations of detected OPFR in the water ranged from 0.7 to 5780.0 ng L-1. The average concentrations of OPFRs in wet season were higher than those in dry season, and the contaminants mainly originated from the source water in the Yangtze River. The exposure assessments of individual and total OPFRs were investigated. The estimated daily intakes of total OPFRs via ingestion of drinking water reached up to 64.8 and 45.2 ng/kg bw/day in dry and wet season, respectively. This study demonstrates a profile of OPFR distribution in Nanjing municipal water and provides information on human exposure assessment via drinking water in the Nanjing District, China.

Emerging contaminants in the Jilin Songhua River (Northeast China)

He S, Dong D, Zhang X, Sun C, Wang C, Hua X, Zhang L, Guo Z. Occurrence and ecological risk assessment of 22 emerging contaminants in the Jilin Songhua River (Northeast China). Environmental science and pollution research international. 2018 Jun 8. doi: 10.1007/s11356-018-2459-3.

Rivers may receive pharmaceuticals, personal care products, and environment estrogens, which are emerging concerns, from various sources. Understanding the fate of these emerging contaminants (ECs) from the sources to their receiving river is important for assessing their ecosystem risk. Here, the occurrence, seasonal variation, spatial distribution, and ecological risk of 22 ECs in water and sediments from the Jilin Songhua River, as well as in the effluents from the riverside Jilin wastewater treatment plant (WWTP) were investigated. Results indicated that estriol with the highest median concentration of 21.5 ng L-1 in the river water and with the highest median concentration of 481.5 ng g-1 in the sediments, and methylparaben with the highest concentration of 29.6 ± 2.9 ng L-1 in the WWTP effluents were the predominant contaminants. The total concentration of ECs in the river water in the dry season was about 1.5 times higher than that in the wet season. The concentrations of these ECs close to the contaminated tributary and the WWTP were relatively high. Risk assessment showed that the maximum risk quotient value of estrone was 1.07 in the river water and estriol was 2.10 in the effluents. In addition, erythromycin posed generally medium risk in the river water and WWTP effluents. It should be paid attention to the prior control of the three contaminants in the river region.

Gonzalez et al 2011: Presence and biological effects of emerging contaminants in Llobregat River basin (Spain): A review

Gonalez, S., R. Lopez-Roldan, and J.L. Cortina. Presence and biological effects of emerging contaminants in Llobregat River basin: A review. Environ Pollut. 2012 Feb;161:83-92. Epub 2011 Nov 2.

Llobregat River (North-East Spain) is the most important drinking water source for Barcelona and its surrounding area. As one of the only water sources in the area the river water have been overexploited and effluents from more than 30 urban wastewater treatment plants, industries and agriculture runoffs have been discharged into the river. This article reviews the presence of emerging contaminants published during the last decades, emphasizing on the observed effects on ecosystems caused by the contamination. Pesticides, surfactants, estrogens, pharmaceuticals and personal care products and even abuse drugs are the main groups detected in different studies, reporting alterations in species composition, abundance or biomass and endocrine disruption measured by alterations in enzymatic activity or specific protein production. The information available provides an overview of the river status according to the Water Framework Directive.

Click here for the full paper (fee).


Trace levels of emerging contaminants found in Santa Ana River (CA)

Click here for a brief news report on monitoring for emerging contaminants in the Santa Ana River by the Santa Ana Watershed Project Authority,  Riverside, Califorina.