不同类型颗粒活性炭（GAC）对硝酸盐的比较研究 已经从水中清除。三个重要的GAC，即。椰子、褐煤和 本研究选择了木材。所有未经处理的GAC均经锌处理 氯化物（ZnCl₂）和碳化。通过对反应条件的研究，确定了最佳反应条件 化学重量比和活化温度等工艺变量的影响。 实验结果表明，化学重量比为200%，温度为500℃ 研究发现，对于水溶液中硝酸盐的最大吸附量，摄氏度是最佳的 解决。virgin和ZnCl₂处理的GAC之间的比较表明 ZnCl₂显著提高了所有活性炭的吸附效率，尤其是 椰子GAC的效率提高了6倍。硝酸盐在土壤中的吸附 不同氯化锌处理的活性炭的顺序为:椰子活性炭>褐煤活性炭 >伍德盖克。硝酸盐在ZnCl₂处理的GAC上的吸附作为一个函数进行了研究 接触时间和温度的关系。动力学研究表明达到了平衡 一小时之内。吸附数据最符合朗缪尔等温线。结果 本研究建议使用ZnCl₂处理过的椰子GAC进行吸附 这可能是未来去除饮用水中硝酸盐的一项有前途的创新技术 水包括16个参考文献、表格和图表。

A comparative study with different types of granular activated carbons (GACs) for nitrate removal from water has been carried out. Three important GACs viz. coconut, lignite and wood were selected for this study. All virgin GACs were treated with zinc chloride (ZnCl₂) and carbonized. The optimal conditions were selected by studying the influence of process variables such as chemical weight ratio and activation temperature. Experimental results reveal that chemical weight ratio of 200% and temperature of 500 ºC was found to be optimum for the maximum adsorption of nitrate from aqueous solutions. The comparison between virgin and ZnCl₂ treated GACs indicate that treatment with ZnCl₂ has significantly improved the adsorption efficacy of all GACs, especially the efficiency of coconut GAC has increased up to 6 folds. The adsorption of nitrate on different zinc chloride treated GACs was found in the order: coconut GAC > lignite GAC > wood GAC. The adsorption of nitrate on ZnCl₂ treated GACs was studied as a function of contact time and temperature. The kinetic study reveals that equilibrium was achieved within one hour. The adsorption data conform best to the Langmuir isotherm. Results of this study recommend that adsorption process using ZnCl₂ treated coconut GAC might be a promising innovative technology in future for nitrate removal from drinking water. Includes 16 references, tables, figures.