Adsorptive removal of COD from produced water using tea waste biochar
This study was conducted to explore the effectiveness of tea waste (TW) biochar (BC) as an adsorbent for the oxidizable organic contaminants measured as chemical oxygen demand (COD) in produced water (PW). BCs were prepared by modifying the TW with single (pre-pyrolysis) and combined (pre and post p...
| Main Authors: | , , , , , |
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| Format: | Article |
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Elsevier
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/95717/ |
| _version_ | 1848862209119092736 |
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| author | Khurshid, Hifsa Ul Mustafa, Muhammad Raza Rashid, Umer Isa, Mohamed Hasnain Yeek, Chia Ho Muhammad Shah, Mumtaz |
| author_facet | Khurshid, Hifsa Ul Mustafa, Muhammad Raza Rashid, Umer Isa, Mohamed Hasnain Yeek, Chia Ho Muhammad Shah, Mumtaz |
| author_sort | Khurshid, Hifsa |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This study was conducted to explore the effectiveness of tea waste (TW) biochar (BC) as an adsorbent for the oxidizable organic contaminants measured as chemical oxygen demand (COD) in produced water (PW). BCs were prepared by modifying the TW with single (pre-pyrolysis) and combined (pre and post pyrolysis) treatments using phosphoric acid and hydrogen peroxide solutions. Based on FTIR, XPS, XRD and BET characterizations, the combined modified BC had higher oxygen-containing functional groups (-OH and -COOH), surface area (82 ± 0.50 m2/g) and pore volume (0.08 ± 0.001 cm 3/g) compared to single modified BC (60 ± 0.50 m2/g, 0.02 ± 0.002 cm 3/g). The Langmuir monolayer adsorption model best fitted both BCs with separation factor
< 1, showing favorable adsorption process. The controlling mechanism of the adsorption process was best described by the pseudo-second-order kinetic model with a coefficient of determination value of 0.995. The particle diffusion mechanism was demonstrated by the Weber–Morris plot. Taguchi method was used in Minitab 19 for optimization of operating factors i.e., pH, contact time and BC dosage. Maximum COD removal efficiencies were found to be 89.35 ± 0.5% and 95.5 ± 0.5% for single and combined modified BCs, respectively. The study provides a successful approach towards high level of COD removal from PW while reducing the waste generation and protecting the environment. |
| first_indexed | 2025-11-15T13:13:23Z |
| format | Article |
| id | upm-95717 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:13:23Z |
| publishDate | 2021 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-957172023-04-05T03:53:49Z http://psasir.upm.edu.my/id/eprint/95717/ Adsorptive removal of COD from produced water using tea waste biochar Khurshid, Hifsa Ul Mustafa, Muhammad Raza Rashid, Umer Isa, Mohamed Hasnain Yeek, Chia Ho Muhammad Shah, Mumtaz This study was conducted to explore the effectiveness of tea waste (TW) biochar (BC) as an adsorbent for the oxidizable organic contaminants measured as chemical oxygen demand (COD) in produced water (PW). BCs were prepared by modifying the TW with single (pre-pyrolysis) and combined (pre and post pyrolysis) treatments using phosphoric acid and hydrogen peroxide solutions. Based on FTIR, XPS, XRD and BET characterizations, the combined modified BC had higher oxygen-containing functional groups (-OH and -COOH), surface area (82 ± 0.50 m2/g) and pore volume (0.08 ± 0.001 cm 3/g) compared to single modified BC (60 ± 0.50 m2/g, 0.02 ± 0.002 cm 3/g). The Langmuir monolayer adsorption model best fitted both BCs with separation factor < 1, showing favorable adsorption process. The controlling mechanism of the adsorption process was best described by the pseudo-second-order kinetic model with a coefficient of determination value of 0.995. The particle diffusion mechanism was demonstrated by the Weber–Morris plot. Taguchi method was used in Minitab 19 for optimization of operating factors i.e., pH, contact time and BC dosage. Maximum COD removal efficiencies were found to be 89.35 ± 0.5% and 95.5 ± 0.5% for single and combined modified BCs, respectively. The study provides a successful approach towards high level of COD removal from PW while reducing the waste generation and protecting the environment. Elsevier 2021 Article PeerReviewed Khurshid, Hifsa and Ul Mustafa, Muhammad Raza and Rashid, Umer and Isa, Mohamed Hasnain and Yeek, Chia Ho and Muhammad Shah, Mumtaz (2021) Adsorptive removal of COD from produced water using tea waste biochar. Environmental Technology & Innovation, 23. art. no. 101563. pp. 1-17. ISSN 2352-1864 https://www.sciencedirect.com/science/article/pii/S235218642100211X 10.1016/j.eti.2021.101563 |
| spellingShingle | Khurshid, Hifsa Ul Mustafa, Muhammad Raza Rashid, Umer Isa, Mohamed Hasnain Yeek, Chia Ho Muhammad Shah, Mumtaz Adsorptive removal of COD from produced water using tea waste biochar |
| title | Adsorptive removal of COD from produced water using tea waste biochar |
| title_full | Adsorptive removal of COD from produced water using tea waste biochar |
| title_fullStr | Adsorptive removal of COD from produced water using tea waste biochar |
| title_full_unstemmed | Adsorptive removal of COD from produced water using tea waste biochar |
| title_short | Adsorptive removal of COD from produced water using tea waste biochar |
| title_sort | adsorptive removal of cod from produced water using tea waste biochar |
| url | http://psasir.upm.edu.my/id/eprint/95717/ http://psasir.upm.edu.my/id/eprint/95717/ http://psasir.upm.edu.my/id/eprint/95717/ |