Synthetic of Allophane-Like and Adsorption for Lead (Pb) Heavy Metals

International Conference on Green and Renewable Energy Resources 2016

能源学;生态环境科学

Pranoto^1 ; Purnawan, C.^1 ; Widyasari, A.D.^1

Chemistry Department, Faculty of Mathematic and Natural Science, Sebelas Maret University, Indonesia^1

关键词: Adsorption capacities;    Aluminum nitrate;    Bending vibrations;    Contact time;    Ratio of Al;    Solution volume;    Tetraethyl orthosilicates;    Weak absorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/75/1/012015/pdf
DOI  :  10.1088/1755-1315/75/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A synthesis allophone-like had been done from aluminum nitrate nonahidrat (Al (NO3)3.9H2O) and tetraethyl orthosilicate (TEOS). This study aims to determine synthesis of allophane-like based on variations in the ratio of Al/Si is applied as an adsorbent for the lead (Pb) metal. The study was conducted with ratio variation Al/Si 0.5; 0.75; 1; 1.25 and 1.5 from solution volume nonahidrat (Al (NO3)3.9H2O) and TEOS at pH 3-4 calcined at temperature of 400°C. The adsorption type is determined by the adsorption isotherm. The results of the research shows that allophane-like can be synthetized from a solution of nonahidrat (Al (NO3)3.9H2O) and TEOS with a variation of the ratio of Al/Si 0.5; 0.75; 1; 1.25 and 1.5. Allophane-like has function groups of -OH group; spanning asymmetrical form of O-Si-O/O-Al-O; Si-O/Al-O bending vibration and relatively weak absorption which strengthen their OH group. The results of allophane-like adsorption capacity of 1.61 mg/g in the ratio Al/Si of 1.5 at pH 4 with a contact time of 30 minutes with a percentage of 80.77% adsorption. The adsorptions of Pb heavy metals with allophane-like tend to follow the type of adsorption isotherms of Freundlich or physics.