2021
DOI: 10.1002/jctb.6904
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Removal of hexavalent chromium (Cr(VI)) from aqueous solution using acid‐modified poultry litter‐derived hydrochar: adsorption, regeneration and reuse

Abstract: BACKGROUND: Chromium (Cr) is widely used in industrial processes and is considered a major source of pollution when released to the environment. Of particular concern, hexavalent chromium (Cr(VI)) is amongst the most toxic heavy metals affecting human health and living organisms when fugitive emissions contaminate aqueous environments. Consequently, its removal and recovery are priorities for environmental remediation in the context of the circular economy. In this study, modified hydrochar (MHC) was generated… Show more

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Cited by 36 publications
(11 citation statements)
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“…However, it is not a very effective adsorbent for especially anionic pollutants due to its rich oxygencontaining functional groups. Hence, to enhance their adsorption performances, the surface can be easily activated (acidic or basic) or modified due to its abundant oxygen-containing functional groups [20,21]. NaOH or KOH-activated HC has been widely utilized and the surface of HC has been modified with diverse functional groups for the removal of generally cationic pollutants [22][23][24].…”
Section: Introductionmentioning
confidence: 99%
“…However, it is not a very effective adsorbent for especially anionic pollutants due to its rich oxygencontaining functional groups. Hence, to enhance their adsorption performances, the surface can be easily activated (acidic or basic) or modified due to its abundant oxygen-containing functional groups [20,21]. NaOH or KOH-activated HC has been widely utilized and the surface of HC has been modified with diverse functional groups for the removal of generally cationic pollutants [22][23][24].…”
Section: Introductionmentioning
confidence: 99%
“…Commonly used isotherm models include the equations of Langmuir, Freundlich, Sips, and Dubinin-Radushkevich. [1][2][3] Many software packages, including Excel, 4 offer standard nonlinear regression methods to fit these isotherm equations to experimental data. The conventional nonlinear regression procedure minimizes the sum of squared residuals (SSR) using a fitting algorithm.…”
Section: Introductionmentioning
confidence: 99%
“…Experimentally measured isotherms for water contaminant adsorption on solid materials are generally correlated using suitable theoretical or empirical models. Commonly used isotherm models include the equations of Langmuir, Freundlich, Sips, and Dubinin—Radushkevich 1‐3 . Many software packages, including Excel, 4 offer standard nonlinear regression methods to fit these isotherm equations to experimental data.…”
Section: Introductionmentioning
confidence: 99%
“…Cr(VI) is highly migratory and toxic, which is higher than Cr(III). 3,4 Long-term exposure to Cr(VI) is likely to cause cancer, teratogenesis and mutagenicity. 5 Therefore, the removal of Cr(VI) in polluted wastewater is the key to ensure the safety of water quality, which has attracted increasing attention in recent years.…”
Section: Introductionmentioning
confidence: 99%
“…Chromium mainly exists in the form of Cr(VI) and Cr(III). Cr(VI) is highly migratory and toxic, which is higher than Cr(III) 3,4 . Long‐term exposure to Cr(VI) is likely to cause cancer, teratogenesis and mutagenicity 5 .…”
Section: Introductionmentioning
confidence: 99%