Ammonium and Orthophosphate Adsorption Efficiency of Coffee Ground and Coffee Ground Charcoal

Authors

  • Phattaraporn Phanomchaisawang นักศึกษา หลักสูตรวิทยาศาสตรมหาบัณฑิต สาขาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Kanita Tungkananuruk รองศาสตราจารย์ ภาควิชาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Noppawan Semvimol อาจารย์ ภาควิชาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์
  • Chalisa Veesommai อาจารย์ ภาควิชาวิทยาศาสตร์สิ่งแวดล้อม คณะสิ่งแวดล้อม มหาวิทยาลัยเกษตรศาสตร์

Keywords:

Ammonium, Orthophosphate, Coffee Ground

Abstract

The efficiency of coffee ground waste as biosorbent for ammonium and orthophosphate removal in solution was studied. The adsorption study was performed in batch method at different 3 types of adsorbents: Coffee Ground (CG), Coffee Ground Charcoal (CGC), and activated coffee ground charcoal by H3PO4 (P-CGC). At the optimum condition of each adsorbent, it was found that pH 7, initial concentration of 20.0 mg/L, adsorbent dose of 1.0 g. CG adsorption for ammonium and orthophosphate at a contact time of 1 and 30 min respectively, While CGC and P-CGC adsorption for ammonium and orthophosphate at a contact time of 60 min. The adsorption percentage of CG, CGC, and P-CGC for ammonium were 97.55±0.15, 98.47±0.08, and 98.32±0.08, respectively and orthophosphate were 95.64±0.07, 95.30±0.05, and 95.54±0.07 respectively. The kinetic experimental data of these 3 adsorbents can be described according to the Pseudo-second order model. The isotherm model which fits the experimental data was the Freundlich model. The results demonstrated the beneficial use of the coffee ground as potential ammonium and orthophosphate bio-adsorbent and could be used as soil amendment material.

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Published

2022-04-23

Issue

Vol. 22 No. 2 (2022)

Section

บทความวิจัย

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