Adsorption performance of coated bentonite via graphene oxide
Abstract Background The nano-adsorbents present considerable decontamination potential due to their unique characteristics. This study aimed to investigate the adsorption efficiency and capacity of synthesized nano graphene oxide coated layer over Egyptian clays (bentonite, kaolinite and feldspar) a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-04-01
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| Series: | Bulletin of the National Research Centre |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s42269-020-00299-8 |
| _version_ | 1818942564118560768 |
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| author | H H Shaarawy H S Hussein E Abdel Kader Nabila H Hussien S I Hawash |
| author_facet | H H Shaarawy H S Hussein E Abdel Kader Nabila H Hussien S I Hawash |
| author_sort | H H Shaarawy |
| collection | DOAJ |
| description | Abstract Background The nano-adsorbents present considerable decontamination potential due to their unique characteristics. This study aimed to investigate the adsorption efficiency and capacity of synthesized nano graphene oxide coated layer over Egyptian clays (bentonite, kaolinite and feldspar) as substrate. The experimental work involves nano graphene oxide coating using acid dehydration via sulfuric acid in presence of different percentage of sugar (fine powder from 1 to 7%), followed by thermal activation to improve the adsorption capacity of natural clay that is locally available in Egypt. Several operating parameters were studied to prepare the superior adsorbent (type of substrate, sulfuric acid concentration, sugar concentration and contact time). Results The optimum preparation conditions of nano graphene oxide coated bentonite (NGOCB) adsorbent were bentonite substrate 1 kg, sulfuric acid concentration 1.5 kg/kg clay, sugar fine powder 50 g/kg clay, water 3000 ml/kg clay, and stirring time of 30 min at 100 °C. The morphology characterization showed that the deposited graphene oxide layer is in the nano form (6 to 33 nm). Sets of experiments were conducted to evaluate the adsorption performance of synthesized NGOCB for removal of methylene blue (MB) dye from aqueous solutions. Effect of initial dye concentration, contact time, pH and temperature on the adsorption capacity of the modified adsorbent were studied. The capacity of the prepared nano graphene oxide coated bentonite adsorbent was 1000 mg/g. Conclusions The removal efficiency of nano graphene coated clay reached to 99.9% that indicates the Egyptian bentonite could be employed as a low-cost absorbent for dye removal. |
| first_indexed | 2024-12-20T07:13:26Z |
| format | Article |
| id | doaj.art-3c6a71c905194d2aab61ef265f608449 |
| institution | Directory Open Access Journal |
| issn | 2522-8307 |
| language | English |
| last_indexed | 2024-12-20T07:13:26Z |
| publishDate | 2020-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Bulletin of the National Research Centre |
| spelling | doaj.art-3c6a71c905194d2aab61ef265f6084492022-12-21T19:48:51ZengSpringerOpenBulletin of the National Research Centre2522-83072020-04-0144111010.1186/s42269-020-00299-8Adsorption performance of coated bentonite via graphene oxideH H Shaarawy0H S Hussein1E Abdel Kader2Nabila H Hussien3S I Hawash4Chemical Engineering & Pilot Plant Department, National Research CentreChemical Engineering & Pilot Plant Department, National Research CentreChemical Engineering & Pilot Plant Department, National Research CentreChemical Engineering & Pilot Plant Department, National Research CentreChemical Engineering & Pilot Plant Department, National Research CentreAbstract Background The nano-adsorbents present considerable decontamination potential due to their unique characteristics. This study aimed to investigate the adsorption efficiency and capacity of synthesized nano graphene oxide coated layer over Egyptian clays (bentonite, kaolinite and feldspar) as substrate. The experimental work involves nano graphene oxide coating using acid dehydration via sulfuric acid in presence of different percentage of sugar (fine powder from 1 to 7%), followed by thermal activation to improve the adsorption capacity of natural clay that is locally available in Egypt. Several operating parameters were studied to prepare the superior adsorbent (type of substrate, sulfuric acid concentration, sugar concentration and contact time). Results The optimum preparation conditions of nano graphene oxide coated bentonite (NGOCB) adsorbent were bentonite substrate 1 kg, sulfuric acid concentration 1.5 kg/kg clay, sugar fine powder 50 g/kg clay, water 3000 ml/kg clay, and stirring time of 30 min at 100 °C. The morphology characterization showed that the deposited graphene oxide layer is in the nano form (6 to 33 nm). Sets of experiments were conducted to evaluate the adsorption performance of synthesized NGOCB for removal of methylene blue (MB) dye from aqueous solutions. Effect of initial dye concentration, contact time, pH and temperature on the adsorption capacity of the modified adsorbent were studied. The capacity of the prepared nano graphene oxide coated bentonite adsorbent was 1000 mg/g. Conclusions The removal efficiency of nano graphene coated clay reached to 99.9% that indicates the Egyptian bentonite could be employed as a low-cost absorbent for dye removal.http://link.springer.com/article/10.1186/s42269-020-00299-8ClayBentoniteKaoliniteFeldsparAdsorptionGraphene oxide |
| spellingShingle | H H Shaarawy H S Hussein E Abdel Kader Nabila H Hussien S I Hawash Adsorption performance of coated bentonite via graphene oxide Bulletin of the National Research Centre Clay Bentonite Kaolinite Feldspar Adsorption Graphene oxide |
| title | Adsorption performance of coated bentonite via graphene oxide |
| title_full | Adsorption performance of coated bentonite via graphene oxide |
| title_fullStr | Adsorption performance of coated bentonite via graphene oxide |
| title_full_unstemmed | Adsorption performance of coated bentonite via graphene oxide |
| title_short | Adsorption performance of coated bentonite via graphene oxide |
| title_sort | adsorption performance of coated bentonite via graphene oxide |
| topic | Clay Bentonite Kaolinite Feldspar Adsorption Graphene oxide |
| url | http://link.springer.com/article/10.1186/s42269-020-00299-8 |
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