Microfiber release from different fabrics during washing.

Microfiber is a subgroup of microplastics and accounts for a large proportion of microplastics in aquatic environment, especially in municipal effluents. The purpose of the present study was to quantify microfiber shedding from three most populate synthetic textile fabrics: polyester, polyamide, and acetate fabrics. The results showed that more microfibers were released after washing with a pulsator laundry machine than a platen laundry machine.

Removal of microplastics in municipal sewage from China's largest water reclamation plant.

Municipal sewage treatment plants (STPs) are an important point source of microplastics in domestic waterways. In the present study, effluents from the largest water reclamation plant in China were sampled throughout the treatment process and microplastics were extracted and identified to evaluate their removal. As expected, microplastics were detected in the influent (12.

[Concentration, Flux, and Emission Factor of NO in Rivers with Different Nitrogen Pollution Features].

In this study, 22 rivers in Tieling City were selected to study the concentration, flux, and emission factor (EF) of NO. Based on the concentrations and components of nitrogen (N), the 22 rivers can be divided into ammonia nitrogen (NH)-polluted rivers (mean NH=5.86 mg·L), nitrate nitrogen (NO)-polluted rivers (mean NO=3.

[Spatio-temporal Distribution and Source Apportionment of Nitrogen in Rivers of Tieling].

This study analyzed the spatio-temporal distribution and sources of nitrogen (N) in 22 rivers in Tieling City during 2013-07-2014-07. The results showed that the concentrations of TN, NO-N, and NH-N were 1.26-18.

Effects of land use on the concentration and emission of nitrous oxide in nitrogen-enriched rivers.

Nitrous oxide (NO) is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. Nitrogen-enriched rivers are significant sources of atmospheric NO. This study conducted a one-year field campaign in seven N-enriched rivers draining urban, rural, and agricultural land to determine the link between the production, concentrations, and emissions of NO and land use.

Transcriptomic responses of the freshwater snail (Parafossarulus striatulus) following dietary exposure to cyanobacteria.

Freshwater snails are promising bioindicators that can be used in ecotoxicological testing and ecological risk assessments. To screen molecular responses following mollusk exposure to algal blooms, whole transcriptome sequencing was performed with the freshwater snail (Parafossarulus striatulus) fed with blue algae (Microcystis aeruginosa). A total of 86,848 unigenes were assembled, and 10,413 unigenes were annotated in the TrEMBL, Pfam, KEGG, and SwissProt databases.

[Denitrification in water of Daliao River estuary in summer and the effect of environmental factors].

Ratios of nitrogen loss and N2O production by denitrification were observed in Daliao River and the estuary in summer 2013. The results showed that the concentrations of N and P in the main stream of Daliao River were significant higher than those in the estuary (P < 0.05).

Mechanism of ofloxacin fluorescence quenching and its interaction with sequentially extracted dissolved organic matter from lake sediment of Dianchi, China.

The wide use and occurrence of antibiotics in water environments have caused wide concerns. Ofloxacin (OFL) was selected as a target antibiotic, and the interaction between OFL and sequential extracted dissolved organic matter (DOM) from the sediment of Dianchi, a hypertrophic lake in Southwest China, was explored using fluorescence quenching technology. The method of fuorescence quenching was used to characterize the interaction between OFL and sequentially extracted DOM.