Na-Al改性膨润土氨氮吸附材料的制备研究  

Research on Preparation of Ammonia Nitrogen Adsorbent of Na-Al Modifying Bentonite

作　　者：王高锋[1] 屈小梭 孙志明[1] 郑水林[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]中华环保联合会环保技术标准研究专业委员会,北京100012

出　　处：《非金属矿》2015年第2期68-70,共3页Non-Metallic Mines

摘　　要：采用部分钠化-铝化的方法对膨润土改性制备氨氮吸附材料,研究改性剂钠铝比、改性剂用量、改性时间等制备条件对改性膨润土氨氮吸附性能的影响,探究改性膨润土吸附氨氮机理。试验结果表明:优化改性条件为改性剂钠铝比5∶1,改性剂用量6%,改性时间2 h;对低浓度模拟氨氮废水,改性后膨润土矿物材料吸附氨氮量明显高于改性前原矿,制得的吸附材料对初始质量浓度为5 mg/L、100 m L实验室模拟氨氮废水的氨氮去除率达到79.03%;氨氮吸附方式为阳离子交换吸附,通过Na-Al改性提高了膨润土材料的阳离子交换容量,从而提高了膨润土吸附性能。A kind of ammonia nitrogen adsorbent was prepared through part of Na-Al modify technique. The effect of the ratio of sodium chloride and aluminum chloride, the amount of modifier and the modification time on the ammonium nitrogen adsorption property were studied. Moreover, the modification mechanism of ammonia nitrogen adsorbent was researched. It is observed that the optimized conditions are the ratio of sodium chloride and aluminum chloride is 5∶1, the amount of modifier is 6%,the modification time is 2 h. The modified bentonite adsorbed ammonium-nitrogen is clearly higher than unmodified for low concentration simulate wastewater 100 m L and the modified bentonite adsorbed for the simulate ammoniumnitrogen wastewater 100 m L with the initial concentration of 5 mg/L, the removal rate is up to 79.03%. The ammonium nitrogen adsorption is ion exchange adsorption; through the Na-Al modification, the cation exchange content of the modified bentonite was improved, which improves the adsorb ability of bentonite.

关 键 词：膨润土 改性 吸附 氨氮废水 

分 类 号：TQ424.2[化学工程] X703[环境科学与工程—环境工程]