Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid
The presence of heavy metal Cr(VI) in water indicates environmental pollution. Heavy metal Cr(VI) that exceeds the standard can be harmful to health because it is toxic and carcinogenic. Activated carbon can be used as a heavy metal adsorbent. Modification of activated carbon using nitric acid can...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Department of Chemistry, Pattimura University
2025-01-01
|
| Series: | Indonesian Journal of Chemical Research |
| Subjects: | |
| Online Access: | https://ojs3.unpatti.ac.id/index.php/ijcr/article/view/12726 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832582971006124032 |
|---|---|
| author | Wahyu Ratnaningsih Vebri Aningtyas Husna Muizzati Shabrina Uma Fadzilia Arifin Wisnu Prayogo Muhammad Amin |
| author_facet | Wahyu Ratnaningsih Vebri Aningtyas Husna Muizzati Shabrina Uma Fadzilia Arifin Wisnu Prayogo Muhammad Amin |
| author_sort | Wahyu Ratnaningsih |
| collection | DOAJ |
| description |
The presence of heavy metal Cr(VI) in water indicates environmental pollution. Heavy metal Cr(VI) that exceeds the standard can be harmful to health because it is toxic and carcinogenic. Activated carbon can be used as a heavy metal adsorbent. Modification of activated carbon using nitric acid can increase metal adsorption capacity. Therefore, this study aims to determine the kinetic of hexavalent chromium (Cr(VI)) removal by corn cob-based activated carbon modified with nitric acid. The modified activated carbon was characterized by Boehm titration and FTIR spectrophotometer. The adsorption capacity was identified in various parameters, involving the initial concentration of Cr(VI), pH value, contact time, and concentration of the adsorbent to obtain the optimal Cr(VI) removal efficiency value. The most optimal Cr(VI) adsorption was obtained at an activated carbon dosage of 3 g/L, pH value of 1, contact time of 140 minutes, and 100 mg/l Cr(VI) concentration. Based on adsorption kinetics data, the pseudo-second-order equation was obtained (R2 =0.994). The adsorption phenomenon followed the Langmuir isotherm model (R2 = 0.998) with an optimum adsorption capacity of 28.32 mg/g. Corn cob-activated carbon modified with nitric acid has many acidic groups that act as effective active sites for reducing Cr(VI) from water.
|
| format | Article |
| id | doaj-art-b351a0ce257d4788b92d9ce5758c9e6e |
| institution | Kabale University |
| issn | 2338-5359 2614-2627 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Department of Chemistry, Pattimura University |
| record_format | Article |
| series | Indonesian Journal of Chemical Research |
| spelling | doaj-art-b351a0ce257d4788b92d9ce5758c9e6e2025-01-29T06:39:14ZengDepartment of Chemistry, Pattimura UniversityIndonesian Journal of Chemical Research2338-53592614-26272025-01-0112310.30598/ijcr.2025.12-ratKinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric AcidWahyu Ratnaningsih0Vebri Aningtyas1Husna Muizzati Shabrina2Uma Fadzilia Arifin3Wisnu Prayogo4Muhammad Amin5Department of Plastics and Rubber Processing Technology Politeknik ATK Yogyakarta, Yogyakarta 55188, IndonesiaDepartment of Chemisty, University of Gadjah Mada, Yogyakarta 55281, IndonesiaDepartment of Environmental Engineering, Universitas Pembangunan Nasional Veteran, Yogyakarta 55283, IndonesiaDepartment of Plastics and Rubber Processing Technology Politeknik ATK Yogyakarta, Yogyakarta 55188, IndonesiaDepartment of Building Engineering Education, Universitas Negeri Medan, Medan 20221, IndonesiaFaculty of Geoscience and Civil Engineering, Ishikawa 920-1192, Japan The presence of heavy metal Cr(VI) in water indicates environmental pollution. Heavy metal Cr(VI) that exceeds the standard can be harmful to health because it is toxic and carcinogenic. Activated carbon can be used as a heavy metal adsorbent. Modification of activated carbon using nitric acid can increase metal adsorption capacity. Therefore, this study aims to determine the kinetic of hexavalent chromium (Cr(VI)) removal by corn cob-based activated carbon modified with nitric acid. The modified activated carbon was characterized by Boehm titration and FTIR spectrophotometer. The adsorption capacity was identified in various parameters, involving the initial concentration of Cr(VI), pH value, contact time, and concentration of the adsorbent to obtain the optimal Cr(VI) removal efficiency value. The most optimal Cr(VI) adsorption was obtained at an activated carbon dosage of 3 g/L, pH value of 1, contact time of 140 minutes, and 100 mg/l Cr(VI) concentration. Based on adsorption kinetics data, the pseudo-second-order equation was obtained (R2 =0.994). The adsorption phenomenon followed the Langmuir isotherm model (R2 = 0.998) with an optimum adsorption capacity of 28.32 mg/g. Corn cob-activated carbon modified with nitric acid has many acidic groups that act as effective active sites for reducing Cr(VI) from water. https://ojs3.unpatti.ac.id/index.php/ijcr/article/view/12726Activated carbon, corn cob, Cr(VI) heavy metal, nitric acid modification |
| spellingShingle | Wahyu Ratnaningsih Vebri Aningtyas Husna Muizzati Shabrina Uma Fadzilia Arifin Wisnu Prayogo Muhammad Amin Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid Indonesian Journal of Chemical Research Activated carbon, corn cob, Cr(VI) heavy metal, nitric acid modification |
| title | Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid |
| title_full | Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid |
| title_fullStr | Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid |
| title_full_unstemmed | Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid |
| title_short | Kinetic of Hexavalent Chromium (Cr(VI)) Removal by Corn Cob-Based Activated Carbon Modified with Nitric Acid |
| title_sort | kinetic of hexavalent chromium cr vi removal by corn cob based activated carbon modified with nitric acid |
| topic | Activated carbon, corn cob, Cr(VI) heavy metal, nitric acid modification |
| url | https://ojs3.unpatti.ac.id/index.php/ijcr/article/view/12726 |
| work_keys_str_mv | AT wahyuratnaningsih kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid AT vebrianingtyas kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid AT husnamuizzatishabrina kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid AT umafadziliaarifin kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid AT wisnuprayogo kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid AT muhammadamin kineticofhexavalentchromiumcrviremovalbycorncobbasedactivatedcarbonmodifiedwithnitricacid |