摘要
通过对沸石的改性,在沸石表面形成了一层纳米态的二氧化锰,而纳米态的二氧化锰及沸石都对水中重金属有强烈的吸附性能,从而达到对铬、砷离子的吸附作用。通过沸石与二氧化锰的配比、吸附溶液的pH值、吸附时间、改性沸石的用量对其去除效果的影响,探讨了吸附作用机理。通过吸附测定,改性沸石的最佳配比沸石:MnO2为2:1;改性沸石对As(III)的最佳吸附pH和时间为5.0和30 min;对Cr(VI)的最佳吸附pH和时间为7.0和30 min的条件下吸附效果最佳。
Based on the modified zeolite in zeolite surface formed a layer of nano mode,and nano state of manganese dioxide on water and zeolite MnO2 heavy metals have strong adsorption performance.Thus reach on chrome,arsenic ion adsorption role.Through zeolite in MnO2 the proportion,the adsorption solution pH value,adsorption time,the dosage of modified zeolite on its removal efficiency,and probes into the influence of adsorption mechanism.Through adsorption determination,zeolite with MnO2 the best ratio was 2：1. Modified zeolite to As（III） the best adsorption ph and time 5.0 and 30 min;For Cr（VI） the best adsorption ph and time for 30 min 7.0 and under the condition of adsorption best effect.
出处
《能源环境保护》
2011年第2期29-32,共4页
Energy Environmental Protection
关键词
二氧化锰
人造沸石
改性
铬
砷
吸附
Manganese dioxide
Artificial
Zeolite
Modification
Chromium
Arsenic
Adsorption
