粉煤灰/壳聚糖复合材料对铅离子吸附研究
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摘要
粉煤灰是火力发电厂排放的大宗工业固体废弃物,材料化转化利用是其高附加值的有效途径。本工作制备了粉煤灰/壳聚糖(FA/CS)复合材料并对其吸附铅离子(Pb~(2+))的性能进行研究。研究结果表明在壳聚糖与粉煤灰的质量比为0.08,乙酸溶液的质量比为4%,吸附水中Pb~(2+)效果最佳。在未调节p H值的条件下,研究了不同配比的FA/CS复合材料的用量对Pb~(2+)吸附能力,经过原子荧光测试数据表明FA/CS复合材料的最佳用量为0.025 g/m L,室温条件下,Pb~(2+)去除率为72.66%。处理后含Pb~(2+)残留浓度低于国家污水排放标准最高允许值。
Fly ash is a large industrial solid waste discharged from thermal power plant, and the material conversion and utilization is an effective way to its high added value. Fly ash / chitosan(FA/CS) composites were prepared by the present work and their lead ion(Pb~(2+)) adsorption properties were studied. The results showed that the mass ratio of chitosan to fly ash was 0.08, and the mass ratio of acetic acid solution was 4%, and the effect of Pb~(2+) on the adsorption water was the best. Under the condition without adjusting the p H value of different proportions of FA/CS composite dosage of Pb~(2+) adsorption capacity, after atomic fluorescence test data show that optimum dosage of FA/CS composite 0.025 g / ml, under the condition of room temperature, the Pb~(2+) removal rate was 72.66%. After treatment, the residual concentration of Pb~(2+) is lower than the maximum allowable value of the national wastewater discharge standard.
Fly ash is a large industrial solid waste discharged from thermal power plant, and the material conversion and utilization is an effective way to its high added value. Fly ash / chitosan(FA/CS) composites were prepared by the present work and their lead ion(Pb~(2+)) adsorption properties were studied. The results showed that the mass ratio of chitosan to fly ash was 0.08, and the mass ratio of acetic acid solution was 4%, and the effect of Pb~(2+) on the adsorption water was the best. Under the condition without adjusting the p H value of different proportions of FA/CS composite dosage of Pb~(2+) adsorption capacity, after atomic fluorescence test data show that optimum dosage of FA/CS composite 0.025 g / ml, under the condition of room temperature, the Pb~(2+) removal rate was 72.66%. After treatment, the residual concentration of Pb~(2+) is lower than the maximum allowable value of the national wastewater discharge standard.
引文
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[3]李剑超,褚君达等.粉煤灰在废水处理中的最新应用研究[J].电力环境保护,2001,17(4):40-42.
[4]彭长宏,汪玉庭,程格,接枝羧基壳聚糖的合成及其对重金属离子的吸附性能[J],环境科学,1998,19(3):29-33.
[5]Ishii,H.Minegishi,M,Lavitpichayawong.
[6]黄湘琦.重金属离子在壳聚糖复合吸附剂上的吸附性能研究[D].合肥工业大学,2010.
[7]许永杉.壳聚糖接枝聚合物的制备及其在聚丙烯非织造布上的应用研究[D].江南大学,2015.
[8]姜立萍.新型聚合物-无机复合微凝胶及其对重金属离子的选择性吸附性能研究[D].兰州大学,2014.
[2]杨超.壳聚糖复合粉煤灰对染料废水处理的研究:[D].南京:南京林业大学,2009.
[3]李剑超,褚君达等.粉煤灰在废水处理中的最新应用研究[J].电力环境保护,2001,17(4):40-42.
[4]彭长宏,汪玉庭,程格,接枝羧基壳聚糖的合成及其对重金属离子的吸附性能[J],环境科学,1998,19(3):29-33.
[5]Ishii,H.Minegishi,M,Lavitpichayawong.
[6]黄湘琦.重金属离子在壳聚糖复合吸附剂上的吸附性能研究[D].合肥工业大学,2010.
[7]许永杉.壳聚糖接枝聚合物的制备及其在聚丙烯非织造布上的应用研究[D].江南大学,2015.
[8]姜立萍.新型聚合物-无机复合微凝胶及其对重金属离子的选择性吸附性能研究[D].兰州大学,2014.