Abstract
The objective of this research was to enhance adsorption capacity of Acacia nilotica (keekar) sawdust for the abatement of chromium bearing wastewater and to investigate the effect of process parameters on adsorption capacity. The sawdust was activated by acid wash and functionalized subsequently with formaldehyde. Functionalization of activated sawdust raised its chromium removal efficiency of almost 10% as compared to its adsorption removal efficiency of HCl treated sawdust in a batch adsorption study. Adsorption kinetic data provided better fitting with pseudo second order model. Maximum adsorption capacity calculated through the best fitting Langmuir model was 6.34 mg·g− 1 and 8.2 mg·g− 1 for HCl treated and formaldehyde functionalized sawdust adsorbents, respectively. The adsorption of Cr(VI) was endothermic when studied by varying temperature from 20 °C to 50 °C for both activated and functionalized adsorbents.
| Original language | English |
|---|---|
| Pages (from-to) | 614-622 |
| Number of pages | 9 |
| Journal | Chinese Journal of Chemical Engineering |
| Volume | 26 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2018 |
Bibliographical note
Publisher Copyright:© 2017 Elsevier B.V.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 6 Clean Water and Sanitation
Keywords
- Acacia nilotica
- Adsorption
- Chromium
- Isotherms
- Kinetics
- Thermodynamics
ASJC Scopus subject areas
- Environmental Engineering
- Biochemistry
- General Chemistry
- General Chemical Engineering
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