The DOI matches its Crossref record; 83 of the 83 references it cites were found in a registry or an index.
KOH-activated high surface area Douglas Fir biochar for adsorbing aqueous Cr(VI), Pb(II) and Cd(II)
Abstract
Biochar has become a popular research topic in sustainable chemistry for use both in agriculture and pollution abatement. To enhance aqueous Cr(VI), Pb(II) and Cd(II) removal efficiency, high surface area (535 m2/g) byproduct Douglas fir biochar (DFBC) from commercial syn-gas production obtained by fast pyrolysis (900-1000 °C, 1-10 s), was subjected to a KOH activation. KOH-activated biochar (KOHBC) underwent a remarkable surface area increase to 1049 m2/g and a three-fold increase in pore volume (BET analysis). Batch sorption studies on KOHBC verses pH revealed that the highest chromium, lead and cadmium removal capacities occurred at pH 2.0, 5.0 and 6.0, respectively. KOHBC exhibited much higher adsorption capacities than unactivated DFBC. Heavy metal loadings onto KOHBC were characterized by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Sorption of Cr(VI), Pb(II) and Cd(II) all followed pseudo-second order kinetics and the Langmuir adsorption model. The highest Langmuir adsorption capacities at the respective pH's of maximum adsorption were 140.0 mg g-1 Pb(II), 127.2 mg g-1 Cr(VI) and 29.0 mg g-1 Cd(II). Metal ions spiked into natural and laboratory waste water systems exhibited high sorption capacities. Desorption studies carried out using 0.1 M HCl revealed that Pb(II) adsorption onto the KOHBC surface is reversible. Portions of Cd(II) and Cr(VI) adsorbed strongly onto KOHBC were unable to be desorbed by 0.1 M HCl and 0.1 M NaOH.
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Citations
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Cited by
Biochar as a low-cost adsorbent for aqueous heavy metal removal: A review
Qiu, B., Tao, X., Wang, H., Li, W., Ding, X., & Chu, H. (2021) · Journal of Analytical and Applied Pyrolysis · doi:10.1016/j.jaap.2021.105081 · Cited by 687
Hama Aziz, K. H., Fatah, N. M., & Muhammad, K. T. (2024) · Royal Society Open Science · doi:10.1098/rsos.232033 · Cited by 128
Direct air capture of CO2 by KOH-activated bamboo biochar
Zhang, C., Sun, S., He, S., & Wu, C. (2022) · Journal of the Energy Institute · doi:10.1016/j.joei.2022.10.017 · Cited by 108
Perspectives of Engineered Biochar for Environmental Applications: A Review
Haghighi Mood, S., Pelaez-Samaniego, M. R., & Garcia-Perez, M. (2022) · Energy & Fuels · doi:10.1021/acs.energyfuels.2c01201 · Cited by 104
Liu, R., Zhang, Y., Hu, B., & Wang, H. (2022) · Chemosphere · doi:10.1016/j.chemosphere.2021.132087 · Cited by 104
Metadata
- Authors
- Herath, A., Layne, C. A., Perez, F., Hassan, E. B., Pittman, C. U., & Mlsna, T. E.
- Venue
- Chemosphere
- Publisher
- Elsevier BV
- Published
- 2021-04
- Volume
- 269
- Pages
- 128409
- ISSN
- 0045-6535 (ISSN-L)
- OpenAlex
- W3089329083
- Cited by
- 308
- References
- 83
- FWCI
- 10.03
- Type
- journal article
- Language
- en
- Open access
- closed
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- Herath, A., Layne, C. A., Perez, F., Hassan, E. B., Pittman, C. U., & Mlsna, T. E. (2021). KOH-activated high surface area Douglas Fir biochar for adsorbing aqueous Cr(VI), Pb(II) and Cd(II). Chemosphere. https://doi.org/10.1016/j.chemosphere.2020.128409
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