Adsorption of Hexavalent Chromium in Water by Modified Aquatic Plants
Abstract: In this paper, the aquatic plant litter adsorbents of Cr (VI) in water were prepared by chemical modification method using the litter wastes of Phragmites communis, Cattail and Zizania latiflora in artificial wetlands. The adsorption performance and adsorption mechanism of the modified litter of modified aquatic plants were studied by controlling the initial concentration of Cr (VI), the adsorption time and the pH of Cr (VI) solution. The results showed that the adsorption process of Cr (VI) was a rapid and slow process, and the adsorption was 8 h. The results showed that the adsorption process of Cr (VI) in the early stage of the adsorption process was rapid and adsorption after 8 hours to reach a balance. The quasi-second-order kinetic adsorption equation can better describe the adsorption process of Cr (VI) of the modified aquatic litter, and the Langmuir isotherm is more suitable for the modified litter. The saturated adsorption capacities of modified reed, cattail and Zizania caduciflora were 20.168, 19.5957 and 22.0419 mg∙g−1, respectively. The effect of pH on the adsorption of Cr (VI) by the modified aquatic plants was obvious, and the lower the pH, the less the adsorption of Cr (VI) on the modified aquatic plants.
文章引用: 杨登越 , 吴辛睿 , 刘 涛 , 王 博 (2017) 改性水生植物枯落物对水体六价铬的吸附。 环境保护前沿， 7， 390-396. doi: 10.12677/AEP.2017.75052
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