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首页> 外文期刊>Journal of Environmental Health Science and Engineering >Unmodified starch as water-soluble binding polymer for chromium ions removal via polymer enhanced ultrafiltration system
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Unmodified starch as water-soluble binding polymer for chromium ions removal via polymer enhanced ultrafiltration system

机译：未改性淀粉作为水溶性结合聚合物，可通过聚合物增强的超滤系统去除铬离子

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Background In this study the removal of Chromium (III) and Chromium (VI) ions are investigated via polymer enhanced ultrafiltration under important process parameters. This study proposes the use of unmodified starch as a novel polymer in the ultrafiltration process and its performance on the removal of chromium ions was compared with a commonly used polymer, polyethylene glycol. Methods The experiments were carried out at 1.5 bar and different pH values by using 10 kDa hollow fiber membrane operating in a cross-flow mode. Results The best chromium ions removal obtained approached 99% for Chromium (III) ion by unmodified starch at alkaline pH region and at pH 7 for Chromium (VI) ions retention by polyethylene glycol. Permeate flux behavior are fluctuated for both chromium ions tested at high metal ion concentrations. Low concentration of unmodified starch is applied to reduce gelatinization behavior. Conclusions The findings suggest that binding of chromium ions by unmodified starch is related to granule structure which is probably a principal indicator of the non-ionic behavior of unmodified starch.
机译：背景技术在这项研究中，通过在重要工艺参数下通过聚合物增强的超滤技术研究了铬（III）和铬（VI）离子的去除。这项研究提出在超滤过程中使用未改性淀粉作为新型聚合物，并将其在去除铬离子方面的性能与常用的聚合物聚乙二醇进行了比较。方法使用交叉流动模式的10 kDa中空纤维膜在1.5 bar和不同pH值下进行实验。结果在碱性pH范围内，未改性淀粉对铬（III）离子的去除效果最好，接近99％，而在聚乙二醇中对铬（VI）离子的保留，pH值为7时，去除效果最佳。在高金属离子浓度下测试的两种铬离子的渗透通量行为均发生波动。低浓度的未改性淀粉可用于降低糊化行为。结论结论表明，未改性淀粉与铬离子的结合与颗粒结构有关，这可能是未改性淀粉非离子行为的主要指标。

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