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Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study

Communications in Science and Technology · Vol. 7 No. 1 (2022) · hlm. 15–22

DOI
10.21924/cst.7.1.2022.669
ISSN
2502-9266, 2502-9258
Terbit
2022-07-31
Penerbit
Komunitas Ilmuwan dan Profesional Muslim Indonesia
Bahasa
eng

Abstrak

Toxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar derived from bagasse was successfully prepared by hydrothermal carbonization treatment at temperature of 270oC, and pressure of 10 Bar for 30 minutes. For enhancing the adsorption ability, hydrochar was activated by adding KOH that was able to increase the percent removal by ~11%. The hydrochar was characterized using FTIR before and after adsorption. The results showed that the dominant functional groups of hydrochar included O-H, C=O, -O- and aromatic compounds. Whereas, the functional group of azo groups such as N-H and N=N appeared after adsorption. The maximum adsorption capacity (Qmax) was 5.1204 mg/g, while the adsorption isotherm of MB onto hydrochar followed the Langmuir and Freundlich model. The adsorption mechanism belongs to chemical adsorption, and the rate of diffusion can be neglected because the adsorption kinetics fitted well with pseudo-second order and the value of k2 > kdif > k1. Thermodynamic studies indicated that the adsorption process is classified as endothermic and reversible at room temperature. The results showed that hydrochar could be the alternative adsorbent for removing MB in wastewater. In addition, sugarcane bagasse has a great potential as feedstock of hydrochar.

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  • Universitas Gadjah Mada
  • Sebelas Maret University
  • Universitas Ahmad Dahlan
  • Diponegoro University
  • State University of Semarang
  • Muhammadiyah University of Surakarta
  • Universitas Airlangga
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Rekan penulisOrganisasiArtikel bersama
Rochmadi RochmadiUniversitas Gadjah Mada9
Eko Agus SuyonoUniversitas Gadjah Mada6
Budhijanto BudhijantoUniversitas Gadjah Mada4
Siti JamilatunUniversitas Ahmad Dahlan3
Hadiyanto HadiyantoDiponegoro University3
Ratna Dewi KusumaningtyasState University of Semarang2
Eni BudiyatiMuhammadiyah University of Surakarta2
Panut MulyonoUniversitas Gadjah Mada2
Wusana Agung WibowoSebelas Maret University2
Rochim Bakti CahyonoUniversitas Gadjah Mada2
Ulfah Juniarti SiregarIPB University2
Lucia Tri SuwantiUniversitas Airlangga2
Tia ErfiantiUniversitas Gadjah Mada2
Dewi Puspita SariSebelas Maret University1
Alanindra SaputraSebelas Maret University1
Chandra Adi PrabowoSebelas Maret University1
Harlita HarlitaSebelas Maret University1
Yeni ElisthatianaUniversitas Ahmad Dahlan1
Siti Nurhalizatul AiniUniversitas Ahmad Dahlan1
Ilham MufandiKhon Kaen University1
Imam Novrizal AjiState University of Semarang1
Meutia Ermina ToifUniversitas Gadjah Mada1
Muslikhin HidayatUniversitas Gadjah Mada1
Retno RingganiUniversitas Gadjah Mada1
Muhammad Mufti AzisUniversitas Gadjah Mada1
Hartini HartiniUniversitas Halu Oleo1
Dyah Retno SawitriIslamic University of Indonesia1
Andhika Puspito NugrohoUniversitas Gadjah Mada1
Angga Puja AsianduUniversitas Gadjah Mada1
R. RochmadiUniversitas Gadjah Mada1
Avido YuliestyanUniversitas Pembangunan Nasional Veteran Yogyakarta1
Apsari Puspita AiniDiponegoro University1
Kusmiyati KusmiyatiMuhammadiyah University of Surakarta1
Achmad RoesyadiInstitut Teknologi Sepuluh Nopember1
Widayat WidayatDiponegoro University1
Sutijan SutijanUniversitas Gadjah Mada1
Martomo SetyawanUniversitas Ahmad Dahlan1

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Sumber metadata: OAI-PMH (metadata jurnal) https://cst.kipmi.or.id/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study</dc:title>
	<dc:creator>Lestari, Dwi Indah</dc:creator>
	<dc:creator>Yuliansyah, Ahmad Tawfiequrrahman</dc:creator>
	<dc:creator>Budiman, Arief</dc:creator>
	<dc:subject xml:lang="en-US">Hydrochar</dc:subject>
	<dc:subject xml:lang="en-US">Hydrothermal carbonization</dc:subject>
	<dc:subject xml:lang="en-US">Adsorption</dc:subject>
	<dc:subject xml:lang="en-US">Methylene blue</dc:subject>
	<dc:subject xml:lang="en-US">Sugarcane bagasse</dc:subject>
	<dc:description xml:lang="en-US">Toxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar derived from bagasse was successfully prepared by hydrothermal carbonization treatment at temperature of 270oC, and pressure of 10 Bar for 30 minutes. For enhancing the adsorption ability, hydrochar was activated by adding KOH that was able to increase the percent removal by ~11%. The hydrochar was characterized using FTIR before and after adsorption. The results showed that the dominant functional groups of hydrochar included O-H, C=O, -O- and aromatic compounds. Whereas, the functional group of azo groups such as N-H and N=N appeared after adsorption. The maximum adsorption capacity (Qmax) was 5.1204 mg/g, while the adsorption isotherm of MB onto hydrochar followed the Langmuir and Freundlich model. The adsorption mechanism belongs to chemical adsorption, and the rate of diffusion can be neglected because the adsorption kinetics fitted well with pseudo-second order and the value of k2 &amp;gt; kdif &amp;gt; k1. Thermodynamic studies indicated that the adsorption process is classified as endothermic and reversible at room temperature. The results showed that hydrochar could be the alternative adsorbent for removing MB in wastewater. In addition, sugarcane bagasse has a great potential as feedstock of hydrochar.</dc:description>
	<dc:publisher xml:lang="en-US">Komunitas Ilmuwan dan Profesional Muslim Indonesia</dc:publisher>
	<dc:date>2022-07-31</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://cst.kipmi.or.id/journal/article/view/669</dc:identifier>
	<dc:identifier>10.21924/cst.7.1.2022.669</dc:identifier>
	<dc:source xml:lang="en-US">Communications in Science and Technology; Vol. 7 No. 1 (2022); 15-22</dc:source>
	<dc:source xml:lang="id-ID">Communications in Science and Technology; Vol 7 No 1 (2022); 15-22</dc:source>
	<dc:source>2502-9266</dc:source>
	<dc:source>2502-9258</dc:source>
	<dc:source>10.21924/cst.7.1.2022</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://cst.kipmi.or.id/journal/article/view/669/101</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2022 Communications in Science and Technology</dc:rights>
</oai_dc:dc>