文章基本信息

标题：Study on Arsenic (III) Sorption Behaviour by River Sediment
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作者：Li Hai-hua ; Meng Rui-jing ; Huang Qiang 等
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2014
卷号：13
期号：2
语种：English
出版社：Technoscience Publications
摘要：The present study deals with sediment sorption of arsenic onto sediments from the middle YellowRiver and major affecting factors (such as temperate, pH, particle size and sediment dose have beenstudied by isothermal sorption and single factor experiments. The results showed that sorptionequilibrium time of each dose and particle size sediment was 5-10 min. expect 1kg/m3. When thesediment dose was 1kg/m3, the sorption equilibrium time was about 180min. The retention rate of As(III)increased with respect to sediment dose while the retention quality of per sediment decreased. As thesediment concentrations are the same, the smaller the particle size, the more the retention quality. Theorder for sorption As(III) was fine sediment>medium sediment>coarse sediment. When pH<7, thepercentage of As (III) removal was higher compared to pH 7. A general increase was there in sorptionwith respect to pH above 7.0 for both the fractions of the sediment. It is evident that the pH for minimumuptake of As (III) is 7.0, and for maximum uptake is 9.0. At the same time, temperate as the main factorfor sorption was also studied. The temperate experiments showed that the temperature is of significanceto sorption. When temperatures between 10-15°C, the higher the temperature, the lower the removalrate. When temperatures between 15-20°C, the higher the temperature, the bigger the removal rate.After temperature greater than 20°C, temperature change effects on arsenic sorption rates do notremain obvious..