ACTIVATED ADSORBENT PREPARED FROM BOVINE BONE WASTE: PHYSICO-CHEMICAL CHARACTERISTICS, ISOTHERM AND THERMODYNAMICS ADSORPTION OF  CHROMIUM IONS IN WASTEWATER

I Nengah Simpen; I Made Sutha Negara; Sofyan Dwi Jayanto

doi:10.29121/ijetmr.v7.i3.2020.534

Authors

I Nengah Simpen Department of Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University, Kampus Bukit Jimbaran, Badung, Bali, Indonesia
I Made Sutha Negara Department of Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University, Kampus Bukit Jimbaran, Badung, Bali, Indonesia
Sofyan Dwi Jayanto Department of Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University, Kampus Bukit Jimbaran, Badung, Bali, Indonesia

DOI:

https://doi.org/10.29121/ijetmr.v7.i3.2020.534

Keywords:

NaOH Activated Low Cost Adsorbent, Chromium Ions, Chrome Electroplating Wastewater, Adsorption Isotherm, Adsorption Thermodynamics

Abstract

The adsorption characteristics of chromium ions in chrome electroplating wastewater on low cost adsorbent have been conducted. Adsorbent was prepared from bovine bone waste of NaOH activated at various concentrations (0.2 to 0.8 M). Its adsorption such as adsorption isotherms and adsorption thermodynamics as well as adsorbent physico-chemical characteristics (surface active sites, crystallinity and crystal size, surface morphology and elementals composition). The result showed that amount of adsorbent surface active sites increased because of NaOH activated, the highest at 0.4 M NaOH concentration (AT_0.4adsorbent). X-ray diffraction patterns of the adsorbents showed a wide peaks and crystal size as nanocrystalline. The surface morfology was stack of aglomerates and leached of Ca and Mg due to increase Na. The adsorption result of adsorbents to chromium ions showed that the highest adsorption ability on AT_0.4adsorbent. It was suitable for Freundlich adsorption isotherm model as physical adsorption and endothermic but the tendency to be spontaneous process.

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