Search

Polyethylene (hydrophobic) and polystyrene latex microspheres (hydrophilic), two kinds of microplastics widely used and frequently detected in water environment, were selected as representatives. The effect of the rainwater bioretention system eonsisting of 90% sandy soil and 10% feedwater sludge under different hydraulic retention time, ionic strength, pH and cation type was studied. The results showed that when the abundance of two kinds of microplastics in the water was 5. 0 X 104,5. 3 X 104 items/L and HRT was 10 min, respectively, the beginning and complete penetration time of microplastics in the modified rainwater bioretention system was significantly delayed than that in the traditional rainwater bioretention system. In the modified rainwater bioretention system, after HRT increased from 10 min to 30 min, polyethylene began to penetrate from 90 min (9 FVs) to 360 min (12 FVs), and polystyrene tex microspheres began to penetrate from 40 min (4 FVs) to 240 min (8 FVs). At high ionic strength (5〇. 〇 mmol/L), the system has a stronger ability to trap microplastics; pH and cation type have no siす nificant influence on the retention effect of microplastics. [ABSTRACT FROM AUTHOR]

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Water treatment residual has good adsorption potential on phosphorus in water solution，but it is poor in strength and tends to disintegrate in water. In order to prepare strong adsorbent with high adsorption capacity, a method of preparing high strength granular phosphorus adsorbent by no-bum was investigated using water treatment residual as raw material with silicate cement, quicklime and gypsum. The preparation conditions of the adsorbent were determined by experiment, then the compressive strength and adsorption properties of the adsorbent were tested. The phosphorus adsorption capacity increased and then drcreased with pH increasing, the maximum adsorption capacity occurring at pH 5.0. The equilibrium partitioning of phosphate between the solid and liquid phases fitted the Freundlich adsorption isotherm, the distribution of adsorption sites on the adsorbent surface is heterogeneous and the adsorption of phosphorus possesses the pattern of monolayer and bilayer adsorption. [ABSTRACT FROM AUTHOR]

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)