Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite
Eriochrome Black T (EBT) and chromium (Cr) are considered to be potential pollutants due to their toxicity and severe impact on the environment. In the current study, hydrotalcite-derived Mg-Ca-Al-LDO mixed metal oxide composite was prepared using a conventional co-precipitation method and explored...
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MDPI AG
2022-10-01
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| author | Anjaneyulu Chatla Ismail W. Almanassra Viktor Kochkodan Tahar Laoui Hussain Alawadhi Muataz Ali Atieh |
| author_facet | Anjaneyulu Chatla Ismail W. Almanassra Viktor Kochkodan Tahar Laoui Hussain Alawadhi Muataz Ali Atieh |
| author_sort | Anjaneyulu Chatla |
| collection | DOAJ |
| description | Eriochrome Black T (EBT) and chromium (Cr) are considered to be potential pollutants due to their toxicity and severe impact on the environment. In the current study, hydrotalcite-derived Mg-Ca-Al-LDO mixed metal oxide composite was prepared using a conventional co-precipitation method and explored in terms of the removal of Cr and EBT dye from aqueous solution in a batch mode adsorption process. The prepared Mg-Ca-Al-LDH, Mg-Ca-Al-LDO and spent Mg-Ca-Al-LDO adsorbents were characterized to propose the adsorption mechanism. Different adsorption parameters were examined, such as adsorbent dosage, initial concentration, pH, reaction temperature and contact time. The EBT adsorption kinetic results matched strongly with the pseudo-second-order model for both Cr (R<sup>2</sup> = 0.991) and EBT (R<sup>2</sup> = 0.999). The Langmuir isotherm model exhibited a maximum adsorption capacity of 65.5 mg/g and 150.3 mg/g for Cr and EBT, respectively. The structure and morphology results obtained after Cr and EBT dye adsorption reveal that the adsorption mechanism is associated with electrostatic interactions and surface complexation of Cr and EBT dye with Mg-Ca-Al-LDO surface functional groups. Moreover, more than 84% of the initial adsorption capacity of EBT and Cr can be achieved on the Mg-Ca-Al-LDO surface after five adsorption/desorption cycles. Finally, the Mg-Ca-Al-LDO mixed metal oxide composite can be potentially used as a cost-effective adsorbent for wastewater treatment processes. |
| first_indexed | 2024-03-09T20:29:58Z |
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| last_indexed | 2024-03-09T20:29:58Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-3f522d0e34d046e092a679d626ae055b2023-11-23T23:26:08ZengMDPI AGCatalysts2073-43442022-10-011210124710.3390/catal12101247Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide CompositeAnjaneyulu Chatla0Ismail W. Almanassra1Viktor Kochkodan2Tahar Laoui3Hussain Alawadhi4Muataz Ali Atieh5Research Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah 27272, United Arab EmiratesResearch Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah 27272, United Arab EmiratesQatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 5825, QatarResearch Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah 27272, United Arab EmiratesResearch Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah 27272, United Arab EmiratesResearch Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah 27272, United Arab EmiratesEriochrome Black T (EBT) and chromium (Cr) are considered to be potential pollutants due to their toxicity and severe impact on the environment. In the current study, hydrotalcite-derived Mg-Ca-Al-LDO mixed metal oxide composite was prepared using a conventional co-precipitation method and explored in terms of the removal of Cr and EBT dye from aqueous solution in a batch mode adsorption process. The prepared Mg-Ca-Al-LDH, Mg-Ca-Al-LDO and spent Mg-Ca-Al-LDO adsorbents were characterized to propose the adsorption mechanism. Different adsorption parameters were examined, such as adsorbent dosage, initial concentration, pH, reaction temperature and contact time. The EBT adsorption kinetic results matched strongly with the pseudo-second-order model for both Cr (R<sup>2</sup> = 0.991) and EBT (R<sup>2</sup> = 0.999). The Langmuir isotherm model exhibited a maximum adsorption capacity of 65.5 mg/g and 150.3 mg/g for Cr and EBT, respectively. The structure and morphology results obtained after Cr and EBT dye adsorption reveal that the adsorption mechanism is associated with electrostatic interactions and surface complexation of Cr and EBT dye with Mg-Ca-Al-LDO surface functional groups. Moreover, more than 84% of the initial adsorption capacity of EBT and Cr can be achieved on the Mg-Ca-Al-LDO surface after five adsorption/desorption cycles. Finally, the Mg-Ca-Al-LDO mixed metal oxide composite can be potentially used as a cost-effective adsorbent for wastewater treatment processes.https://www.mdpi.com/2073-4344/12/10/1247layered double hydroxideadsorptionadsorption kineticdye removalchromium removal |
| spellingShingle | Anjaneyulu Chatla Ismail W. Almanassra Viktor Kochkodan Tahar Laoui Hussain Alawadhi Muataz Ali Atieh Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite Catalysts layered double hydroxide adsorption adsorption kinetic dye removal chromium removal |
| title | Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite |
| title_full | Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite |
| title_fullStr | Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite |
| title_full_unstemmed | Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite |
| title_short | Efficient Removal of Eriochrome Black T (EBT) Dye and Chromium (Cr) by Hydrotalcite-Derived Mg-Ca-Al Mixed Metal Oxide Composite |
| title_sort | efficient removal of eriochrome black t ebt dye and chromium cr by hydrotalcite derived mg ca al mixed metal oxide composite |
| topic | layered double hydroxide adsorption adsorption kinetic dye removal chromium removal |
| url | https://www.mdpi.com/2073-4344/12/10/1247 |
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