商陆生物炭对Pb离子吸附的优势

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本研究实验以Zn、Cd作对照,探究在单一重金属溶液中商陆生物炭对Pb离子吸附效果与溶液初始浓度、溶液pH值、吸附剂投加量的相关性,以及在复合重金属溶液中商陆生物炭对Pb离子吸附效果与吸附温度、吸附时间的相关性.本研究用Langmuir等温模型、准一级热动力学模、准二级热动力学模型,分别拟合在复合重金属溶液中商陆生物炭对Zn、Cd、Pb离子吸附优势与吸附温度、吸附时间的关系,研究发现:用Langmuir等温模型、准二级热动力学模型拟合商陆生物炭在复合重金属溶液中对Zn、Cd、Pb的吸附量可信度更高;在单一重金属溶液中商陆生物炭对Pb离子的最大吸附量分别是Zn、Cd离子的3.54倍、3.18倍;在复合重金属溶液中商陆生物炭对Pb离子的最大吸附量分别是Zn、Cd的2.97倍、2.88倍.因此,商陆生物炭对Pb离子的吸附量优势,为对单一(复合)重金属溶液中Pb离子的回收利用提供了物质基础.
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