酸盐改性红泥基复合材料的表征和重金属吸附研究
Wenlou Jin1, Yanzhi Yang1, Jiacheng Jin1
1School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China.
概括
拜耳红泥和莲花叶粉复合材料是为了从水中去除离子 (Pb2+) 而开发的. 这些材料表现出高吸附能力,表明它们对净化水的潜力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 红泥 (RM) 是一种工业废物产品,具有环境应用的潜力.
- 莲花叶粉 (LL) 是一种具有吸附性质的天然材料.
- 水中的 (Pb2+) 污染对环境和健康构成重大风险.
研究的目的:
- 从红泥和莲花叶粉中合成和表征新型复合材料,以去除离子.
- 研究这些复合材料在水溶液中的吸附性能和机制.
- 优化制备和应用条件,以有效去除.
主要方法:
- 通过高温碳化制备红泥莲叶 (RMLL) 和酸盐修饰的红泥莲叶基质复合物 (PRMLL).
- 坐标实验以确定最佳的制备和应用条件 (剂量,比率,温度).
- 吸附性研究,以评估pH值,剂量和初始度对Pb2+去除的影响.
- 动力学 (伪第一阶,伪第二阶,埃洛维奇) 和等温 (朗穆尔,弗洛因德利希,蒂姆金,杜比宁-拉杜什科维奇) 模型的合适.
主要成果:
- 确定RMLL和PRMLL制备和应用的最佳条件是0.1g剂量,1: 1比率和600°C.
- 吸附动力学遵循伪二阶模型,表明化学吸附.
- 吸附等热体最好用兰格穆尔模型来描述.
- RMLL和PRMLL的最大吸附能力分别为188.1毫克/克和213.4毫克/克,超过其单个成分的最大吸附能力.
结论:
- RMLL和PRMLL复合材料是有效的吸附剂,可以从水中去除Pb2+.
- 酸盐修饰增强了红泥莲叶复合物的吸附能力.
- 这些新型复合材料显示出在废水处理中实际应用的巨大潜力.
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