粉煤灰合成沸石对混合重金属离子的吸附研究  

Adsorption of Mixed Heavy Metal Ions by Zeolite Synthesized from Coal Fly Ash

作　　者：陈晨[1] 程婷[2] 

机构地区：[1]江苏科技大学生物与化学工程学院,江苏镇江212018 [2]江苏城市职业学院城市科学系,江苏南京210017

出　　处：《粉煤灰综合利用》2013年第6期20-23,共4页Fly Ash Comprehensive Utilization

基　　金：江苏省高校自然科学研究资助项目(13KJB610005);江苏科技大学引进人才科研启动项目(35211107);江苏省环境工程重点实验室开放课题(KF2013001)

摘　　要：利用粉煤灰合成沸石吸附混合重金属离子Cu2+、Ni2+、Pb2+、Zn2+,考察初始浓度对沸石吸附4种混合重金属离子的吸附效果影响。结果表明:初始浓度对沸石吸附重金属离子的效果影响显著,当混合重金属离子初始浓度不同时,沸石对其去除率也不同。当初始浓度为50 mg/L与100 mg/L时,重金属离子去除顺序为Cu>Pb>Ni>Zn。当初始浓度提高为200 mg/L与300 mg/L时,去除顺序变为Cu≈Pb>Zn>Ni。沸石对Pb2+与Cu2+两种重金属离子的吸附性能较强,而对Zn2+与Ni2+两种重金属离子的吸附能力较弱。The experiment was conducted to examine the adsorption of mixed heavy metals Cu^2＋ , Ni^2＋ , Pb^2＋and Zn^2＋ through synthesizing zeolite from coal fly ash. The initial concentration was investigated to study the adsorption effect of mixed heavy metal ions. The results showed that, the initial concentration had a significant effect on the adsorption effect of heavy metals. The removal rate of mixed heavy metal ions by synthetic zeolite was different from the initial concentration. When the initial concentration was 50 mg/L and 100 mg/L, the adsorption sequence of heavy metals was Cu〉Pb〉Ni〉Zn. But when the initial concentration was 200 mg/L and 300 mg/L, the adsorption sequence become Cu-Pb〉Zn〉Ni. In addi- tion, the adsorption ability of Pb^2＋ and Cu^2＋ by synthetic zeolite was greater than Zn^2＋ and Ni^2＋.

关 键 词：粉煤灰 重金属 沸石 竞争吸附 

分 类 号：X52[环境科学与工程—环境工程]