ADSORPTION OF Pb(II) BY POLYANILINE/SILICA GEL COMPOSITE: KINETICS AND ISOTHERM STUDIES

Mas Inda Putrinesia, N. Nurlina, W. Rahmalia
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Abstract

Research on the study of kinetics and isotherm adsorption of Pb(II) by polyaniline/silica gel (PANI/SiO2) composite from glass waste has successfully been done. The polymerization of silica gel was prepared by sol-gel process. Meanwhile, PANI/SiO2 composite was prepared using sulfuric acid (H2SO4) as its dopants and hydrogen peroxide (H2O2) for oxidation process. Composition of oxide compound in PANI/SiO2 composite was analyzed by X-Ray Fluorosence (XRF) and Gas Sorption Analyzer (GSA). Adsorption of Pb(II) was carried out by contacting PANI/SiO2 with Pb(NO3)2 solution for 20, 40, 60 and 80 minutes, with concentrations of 150, 200, 250, 300, 350 and 400 mg/L. The optimum contact time was reached at 40 minutes. This adsorption followed pseudo-second order model with R2= 0.996. The first optimum adsorption capacity was reached in the concentration of 250 mg/L. Isotherm adsorption followed Langmuir models with R2= 0.954 (monolayer capacity= 51.02 mg/g).
聚苯胺/硅胶复合材料对铅(II)的吸附:动力学和等温线研究
研究了聚苯胺/硅胶(PANI/SiO2)复合材料对玻璃废渣中铅(II)的吸附动力学和等温吸附。采用溶胶-凝胶法制备了硅胶聚合体。同时,以硫酸(H2SO4)为掺杂剂,过氧化氢(H2O2)氧化制备了PANI/SiO2复合材料。采用x射线荧光(XRF)和气体吸附分析仪(GSA)分析了聚苯胺/二氧化硅复合材料中氧化物的组成。在浓度为150、200、250、300、350和400 mg/L的Pb(NO3)2溶液中,PANI/SiO2与Pb(NO3)2溶液接触20、40、60和80 min,对Pb(II)进行吸附。最佳接触时间为40分钟。吸附符合拟二阶模型,R2= 0.996。在浓度为250 mg/L时达到第一个最佳吸附量。等温吸附符合Langmuir模型,R2= 0.954(单层容量= 51.02 mg/g)。
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