Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology

Used coffee grounds usually end up as landfill. However, the unique structural properties of its porous surface make coffee grounds can be transformed into biochar and performed as an alternative low cost adsorbent. Malachite green (MG) is a readily water soluble dye which is used extensively in tex...

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Main Authors: Mohamad, M., Wannahari, R., Mohammad, R., Shoparwe, N.F., Nawi, A.S.M., Lun, K.W., Wei, L.J.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23722 /
Published: Penerbit UTM Press 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097933489&doi=10.11113%2fjurnalteknologi.v83.14904&partnerID=40&md5=11c3eb4d6c808736a5c863a2af581d40
http://eprints.utp.edu.my/23722/
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spelling utp-eprints.237222021-08-19T09:40:28Z Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology Mohamad, M. Wannahari, R. Mohammad, R. Shoparwe, N.F. Nawi, A.S.M. Lun, K.W. Wei, L.J. Used coffee grounds usually end up as landfill. However, the unique structural properties of its porous surface make coffee grounds can be transformed into biochar and performed as an alternative low cost adsorbent. Malachite green (MG) is a readily water soluble dye which is used extensively in textile and aquaculture industries. The mordant complex structures of MG generate destructive effects to animals and environment. In this study, adsorption of malachite green using spent coffee ground biochar as adsorbent was investigated. The experiments were designed in two methods: classical and optimisation by response surface methodology. Three parameters were studied, which are adsorbent dosage, contact time and pH while the responses in this study are malachite green removal () and adsorption capacity (mg/g). Optimisation studies were performed using response surface methodology. Quadratic model was chosen for both response and studied using central composite design. The correlation coefficient, R2 for the quadratic model of malachite green removal () and adsorption capacity (mg/g) were 0.95 and 0.99, respectively. The optimum malachite green removal () predicted was found at 99.27, by using 0.12 g of adsorbent dosage, 43.05 minutes of contact time and pH of 9.45 at desirability of 1.0. The optimum adsorption capacity (mg/g) predicted was found at 118.01 mg/g, by using 0.02 g of adsorbent dosage, 60 minutes of contact time and pH of 10.24 at desirability of 0.98. So, it was concluded that the spent coffee ground biochar can be used as an effective adsorbent for malachite green removal from aqueous solution. © 2021 Penerbit UTM Press. All rights reserved. Penerbit UTM Press 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097933489&doi=10.11113%2fjurnalteknologi.v83.14904&partnerID=40&md5=11c3eb4d6c808736a5c863a2af581d40 Mohamad, M. and Wannahari, R. and Mohammad, R. and Shoparwe, N.F. and Nawi, A.S.M. and Lun, K.W. and Wei, L.J. (2021) Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology. Jurnal Teknologi, 83 (1). pp. 27-36. http://eprints.utp.edu.my/23722/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Used coffee grounds usually end up as landfill. However, the unique structural properties of its porous surface make coffee grounds can be transformed into biochar and performed as an alternative low cost adsorbent. Malachite green (MG) is a readily water soluble dye which is used extensively in textile and aquaculture industries. The mordant complex structures of MG generate destructive effects to animals and environment. In this study, adsorption of malachite green using spent coffee ground biochar as adsorbent was investigated. The experiments were designed in two methods: classical and optimisation by response surface methodology. Three parameters were studied, which are adsorbent dosage, contact time and pH while the responses in this study are malachite green removal () and adsorption capacity (mg/g). Optimisation studies were performed using response surface methodology. Quadratic model was chosen for both response and studied using central composite design. The correlation coefficient, R2 for the quadratic model of malachite green removal () and adsorption capacity (mg/g) were 0.95 and 0.99, respectively. The optimum malachite green removal () predicted was found at 99.27, by using 0.12 g of adsorbent dosage, 43.05 minutes of contact time and pH of 9.45 at desirability of 1.0. The optimum adsorption capacity (mg/g) predicted was found at 118.01 mg/g, by using 0.02 g of adsorbent dosage, 60 minutes of contact time and pH of 10.24 at desirability of 0.98. So, it was concluded that the spent coffee ground biochar can be used as an effective adsorbent for malachite green removal from aqueous solution. © 2021 Penerbit UTM Press. All rights reserved.
format Article
author Mohamad, M.
Wannahari, R.
Mohammad, R.
Shoparwe, N.F.
Nawi, A.S.M.
Lun, K.W.
Wei, L.J.
spellingShingle Mohamad, M.
Wannahari, R.
Mohammad, R.
Shoparwe, N.F.
Nawi, A.S.M.
Lun, K.W.
Wei, L.J.
Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
author_sort Mohamad, M.
title Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
title_short Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
title_full Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
title_fullStr Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
title_full_unstemmed Adsorption of malachite green dye using spent coffee ground biochar: Optimisation using response surface methodology
title_sort adsorption of malachite green dye using spent coffee ground biochar: optimisation using response surface methodology
publisher Penerbit UTM Press
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097933489&doi=10.11113%2fjurnalteknologi.v83.14904&partnerID=40&md5=11c3eb4d6c808736a5c863a2af581d40
http://eprints.utp.edu.my/23722/
_version_ 1741196721414733824
score 11.62408

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