[Simulation of Water Quality Response of Guishui River Wetland Plants and Water Diversion].

A two-dimensional model MIKE21 coupled with a modified EcoLab module was applied to model the water quality of surface flow wetlands. In the model, vegetation effects, oxygen production, nutrient consumption by microorganisms and vegetation were set in the solutions of hydrodynamic, chemical, and biological processes. Based on the field investigation and measurements in the Guishui River wetland, the model was established for the downstream reaches of the Guishui River and the Sanli River.

[Effects of Dissolved Organic Matter Fractions Extracted from Humus Soil on Sorption of Benzotriazole in Brown Soil and Black Soil].

Dissolved organic matter (DOM) affects the sorption behavior of organic pollutants in soils. In this study, bulk DOM (marked as DOM) was extracted from natural humus soil and divided into five individual fractions by XAD-8 resin and anion/cation exchange resins based on their hydrophobicity-hydrophilicity. The isolated DOM fractions were characterized by FTIR, elemental analysis, UV spectrophotometer and potentiometric titration.

[Enhanced Sorption of Cetirizine to Loessial Soil Amended with Biochar].

Biochar could be used as a stabilizer to control the migration and transformation of pollutants in soil and reduce their environmental risks. Cetirizine (CTZ) was selected as a target pollutant to investigate the effect of biochar on sorption characteristics of loessial soil by batch experiments. Biochars were produced from walnut shell at different temperatures and added to soil at different mass ratios.

[Evaluating Biochar-Water Sorption Coefficients of Pharmaceutically Active Compounds by Using a Linear Free Energy Relationship].

A linear free energy relationship (LFER) approach was used to predict the sorption coefficients of pharmaceutically active compounds (PhACs) to commercial biochar from aqueous solution, and to investigate the contributions of different intermolecular interactions in the overall sorption process. 14 PhACs with diverse functional groups (carboxyl, hydroxyl and nitrogenous heterocyclic) were selected as sorbates. All isotherm data of PhACs sorption to commercial rice straws biochar (carbonization temperature: 400-500℃, 200 mesh) could be well fitted by the Freundlich equation.