Synthesis and Characterization of Allophane-Like as Chromium (Cr) Ion Adsorbent

International Conference on Advanced Materials for Better Future 2017

Pranoto^1 ; Purnawan, C.^1 ; Husnina, A.N.^1

Research Group of Analytical and Environmental Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Ir. Sutami street No. 36 A, Central Java, Surakarta

57125, Indonesia^1

关键词: Adsorption ability;    Adsorption conditions;    Aluminium nitrates;    Bending vibrations;    Chromium metals;    Freundlich and Langmuir isotherms;    Synthesis and characterizations;    Weak absorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/333/1/012062/pdf
DOI  :  10.1088/1757-899X/333/1/012062

来源: IOP

【 摘 要 】

The synthesis and characterization of allophane-like as chrom (Cr) ion adsorbent has been studied. The objectives of this study is to determine the characteristics of allophane-like and determine ratio of Al/Si, chromium solution pH, and contact time to get the best decreasing metal ion chrom (Cr) adsorption condition. The study was conducted with the ratio of Al/Si ratios 0.5; 0.75; 1.0; 1.25 and 1.5 from Tetraetyl Orthosilicate (TEOS) solution and Aluminium Nitrate Nonahydrate [Al(NO3)3.9H2O] in pH 3-4. The result of synthetic was characterized on functional groups and cristallinity. Experiment of adsorption ability using variation of Cr solution pH 3-7, contact time 30, 60, 90 and 120 minutes with batch method. The results by FTIR shows that functional groups-OH, the asymmetry groups O-Si-O or O-Al-O, relatively weak absorption which stronger then the presence of OH and bending vibration Si-O or Al-O on allophane-like. The best conditions of chromium metal adsorption with adsorbent allophane-like was obtained at pH 5, contact time 90 minutes, and the ratio Al/Si 1.5. Types of adsorption in this study follows Freundlich and Langmuir isotherm.