Adsorption of 13X Zeolite on Ni2+ in Wastewater: An Experimental Study
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摘要: 在静态条件下, 实验研究了13X沸石的用量、温度、时间、溶液pH值、初始Ni2+质量浓度对Ni2++ 吸附性能的影响.结果表明: 在室温下, 13X沸石对Ni2++ 的吸附平衡时间为15min, 对Ni2++ 的最大吸附量为4 9.7mg/ g沸石; 静态等温吸附过程符合Langmiur吸附等温方程式; 13X沸石对Ni2++ 的吸附机理为离子交换吸附和表面络合吸附Abstract: The absorbability of 13X zeolite on Ni2+ in wastewater was experimentally studied. The absorption rate, isotherms, capacity and effects of such factors on the absorbability as pH value, Ni2+ concentration in the wastewater, temperature, time and dosage of wastewater were characterized separately. The mechanism for adsorption of 13X zeolite on Ni2+ was also studied. The results show that at ambient temperature, the adsorption capacity of 13X zeolite on Ni2+ in wastewater was 49.7 mg/g zeolite in 15 minutes. The adsorption isotherm for the process exhibits Langmiur behavior, and the ion exchange and surface complex were suggested to be the major adsorption mechanisms in the experiments.
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Key words:
- 13X zeolite /
- wastewater bearing Ni2+ /
- mechanism of adsorption
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表 1 13X沸石分子筛的化学分析结果
Table 1. Chemical analysis of the synthesized 13X zoelite molecular sieve
wB/% 表 2 pH值对13X沸石吸附Ni2+离子效率的影响
Table 2. Effects of pH value on adsorption efficiency of the 13X zeolite
表 3 初始质量浓度对13X沸石吸附Ni2+离子效率的影响
Table 3. Effects of initial Ni2+ concentration on adsorption efficiency of the 13X zeolite
表 4 沸石用量对13X沸石吸附Ni2+离子效率的影响
Table 4. Effects of zeolite dosage on adsorption efficiency of the 13X zeolite
表 5 吸附时间对13X沸石吸附Ni2+离子效率的影响
Table 5. Effects of time on adsorption efficiency of the 13X zeolite
表 6 温度对13X沸石吸附Ni2+离子效率的影响
Table 6. Effects of temperature on adsorption efficiency of the 13X zeolite
表 7 剩余质量浓度与吸附量的关系
Table 7. Relation of remaining Ni2+ concentration in the solution and adsorptive quantities
表 8 某电镀厂废水的静态吸附实验结果
Table 8. Results of static adsorption of Ni2+ in electroplating wastewater
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