水热氧化法制备的氢氧化铝吸附高氯酸根

发布时间：2018-05-27 23:42

本文选题：高氯酸根 + 氢氧化铝　；参考：《科学技术与工程》2016年30期

【摘要】：为了分析水热氧化法制备的氢氧化铝对高氯酸盐的吸附性能,开展了氢氧化铝投加量和pH值对高氯酸盐吸附效率的影响试验,以及氢氧化铝的重复利用性能研究。试验结果表明:水热氧化制备的氢氧化铝能够快速吸附反应液中的高氯酸根,投加量对高氯酸根吸附影响为正相关。pH=4.5条件下,35 g·L~(-1)的制备氢氧化铝在3 h内的高氯酸根吸附率为73%;在pH=4.5条件下,制备氢氧化铝在对高氯酸根的连续三次重复吸附试验中保持着良好的吸附效率,具有较好的重复利用性。此外,制备氢氧化铝对高氯酸根的吸附性能取决于溶液的pH值,吸附率随pH值的升高而降低,在pH=3,制备氢氧化铝投加量50 g·L~(-1)时,高氯酸根吸附率达到93%。氢氧化铝对高氯酸根的主要吸附机制为氢氧化铝正电表面通过静电作用与高氯酸根形成离子对。
[Abstract]:In order to analyze the adsorption performance of aluminum hydroxide prepared by hydrothermal oxidation to perchlorate, the effects of dosage and pH value of aluminum hydroxide on the adsorption efficiency of perchlorate and the reutilization performance of aluminum hydroxide were studied. The experimental results show that aluminum hydroxide prepared by hydrothermal oxidation can rapidly adsorb perchlorate in the reaction solution. The effect of dosage on the adsorption of perchlorate was positive correlation (pH = 4.5). The adsorption rate of aluminium hydroxide was 73% in 3 h, and under pH=4.5 condition, the adsorption rate of aluminum hydroxide was 73 g 路L ~ (-1). The preparation of aluminum hydroxide has a good adsorption efficiency and good reusability in the continuous three times repeated adsorption test of perchlorate. In addition, the adsorption of perchlorate on aluminum hydroxide depends on the pH value of the solution, and the adsorption rate decreases with the increase of pH value. When the pH value is 3 and the dosage of aluminum hydroxide is 50 g / L ~ (-1), the adsorption rate of perchlorate can reach 93? The main adsorption mechanism of aluminum hydroxide on perchlorate is that the positive surface of aluminum hydroxide forms ion pairs with perchlorate through electrostatic interaction.
【作者单位】：江苏大学环境与安全工程学院;
【基金】：江苏大学高级人才基金(10JDG137) 江苏省博士后基金项目(1301064C)资助
【分类号】：X703.1

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