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| 改性蛋壳材料对重金属离子的去除机理研究 |
| Mechanism study on heavy metal removal with modified eggshell |
| 投稿时间：2018-07-04 |
| DOI：10.13259/j.cnki.eri.2019.04.001 |
| 中文关键词: 蛋壳 磷灰石 重金属 吸附 pH |
| 英文关键词:eggshell apatite heavy metals adsorption pH |
| 基金项目:上海市大学生创新创业训练计划项目（SH2017120） |
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| 摘要点击次数: 2794 |
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| 中文摘要: |
| 以废弃蛋壳为主要原料，通过微波法和铁改性法分别合成吸附材料ME和FE，采用扫描电镜、X射线衍射以及比表面积分析仪进行表征，并考察材料对废水中Cu2+、Cd2+、Pb2+的吸附性能及其影响因子（反应时间、吸附剂投加量、重金属离子初始质量浓度以及溶液pH）。结果表明：ME对Cu2+、Cd2+的吸附效果较好，当废水中Cu2+、Cd2+的初始质量浓度为50 mg·L-1、ME的投加量为0.6 g·L-1、pH = 4时，反应20 min后，ME对Cu2+、Cd2+的去除率均高达100%，其饱和吸附量分别为179.2、183.6 mg·g-1；FE对Pb2+的吸附效果较好，当废水中Pb2+的初始质量浓度为50 mg·L-1、pH = 6时，FE对Pb2+的饱和吸附量可达87.23 mg·g-1，Langmuir吸附等温方程可较好地描述该吸附过程。 |
| 英文摘要: |
| Two kinds of adsorption materials called ME and FE were prepared from eggshell by microwave treatment and ferrous sulfate modification, respectively. They were characterized by scanning electron microscopy, X-ray diffractometer and specific surface area analyzer. The effects of reaction time, adsorbent dosage, initial concentration of heavy metals and pH on the adsorption performance of Cu2+, Cd2+ and Pb2+ in the wastewater were investigated. The results showed that ME was effective on the adsorption for Cu2+ and Cd2+. When the initial concentration of Cu2+ and Cd2+ was 50 mg·L-1, ME dosage was 0.6 g·L-1, and pH was 4, the removal efficiencies of Cu2+ and Cd2+ were up to 100% after 20 min, and the adsorption capacities were 179.2 and 183.6 mg·g-1, respectively. FE was effective for the removal of Pb2+. When the initial concentration of Pb2+ was 50 mg·L-1 and pH was 6, the maximum adsorption capacity of FE for Pb2+ reached 87.23 mg·g-1. The adsorption process can be described by Langmuir isotherm equation satisfactorily. |
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