BIOADSORPSI Fe(II) OLEH KULIT BUAH JERUK Citrus nobilis Lour. var microcarpa TERMODIFIKASI Ca(OH)2

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2019-07-12 DOI:10.26418/INDONESIAN.V1I3.34205

Norvi Fatmawati, T. Usman, Titin Anita Zahara

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Abstract

Pontianak peel fruit waste contains pectin, cellulose, and hemicellulose which can be used as heavy metal adsorbents by modifying using Ca(OH)2. The purpose of this study was to determine the physicochemical characteristics of calcium-modified Pontianak Citrus adsorbents (JeP-Oca), determine the maximum capacity of Fe(II) adsorption by JeP-OCa, and JeP-OCa adsorption kinetics. The characteristics of the adsorbent were analyzed using the Fourier Transformation Infra Red (FTIR) showing the functional groups of –OH and -COOH, Electron Scanning (SEM) Microscopy showing the surface structure of the canal and many irregular niches. The adsorption isotherm method with the BET model showed a large difference in porous surface area, namely 104.872 m2/g for JeP, 242.649 m2/g for JeP-ONa and 3759.745 m2/g for JeP-OCa. Optimization of the influence of pH, adsorbent mass, adsorbate concentration, and time using the column method. Adsorption isotherm followed the Freundlich isotherm model with maximum adsorption capacity value of 22.7272 mg/g. Fulfill the pseudo-order 2 reaction kinetics with a rate constant value of 4.097 L/mg. Min. The adsorption application using groundwater resulted in absorption efficiency of 82.99%.

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Fe(II)配柑橘皮。var microcarpa修改了Ca(OH)2

Pontianak果皮废弃物中含有果胶、纤维素和半纤维素，经Ca(OH)2改性后可作为重金属吸附剂。本研究的目的是确定钙修饰的Pontianak Citrus吸附剂(JeP-Oca)的物理化学特性，确定JeP-Oca对Fe(II)的最大吸附量，以及JeP-Oca的吸附动力学。利用傅里叶变换红外光谱(FTIR)分析了吸附剂-OH和-COOH的官能团，电子扫描显微镜(SEM)分析了吸附剂的表面结构和许多不规则的壁槽。采用BET模型的等温线吸附法，孔隙表面积差异较大，JeP为104.872 m2/g, JeP- ona为242.649 m2/g, JeP- oca为3759.745 m2/g用柱法优化了pH、吸附剂质量、吸附质浓度、吸附时间的影响。吸附等温线符合Freundlich等温线模型，吸附容量最大值为22.7272 mg/g。反应速率常数为4.097 L/mg，符合准二级反应动力学。采用地下水吸附，吸附效率为82.99%。

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Indonesian Journal of Pure and Applied Chemistry

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