Expanded clay aggregates multi-functionality for water purification: Disinfection and adsorption studies
| Autor: | Victoria N. Anyakora, O. S. Odusanya, Azikiwe Peter Onwualu, Ifeyinwa Ijeoma Obianyo, Esther Nneka Anosike-Francis, Gina Odochi Ihekweme |
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| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
General Computer Science 020209 energy General Chemical Engineering General Engineering Heavy metals Portable water purification Multi functionality 02 engineering and technology e. coli bacteria Contamination Engineering (General). Civil engineering (General) adsorption studies 020901 industrial engineering & automation Adsorption expanded clay aggregates Environmental chemistry isotherm models 0202 electrical engineering electronic engineering information engineering Environmental science TA1-2040 heavy metals water purification E coli bacteria Groundwater |
| Zdroj: | Cogent Engineering, Vol 8, Iss 1 (2021) |
| ISSN: | 2331-1916 |
| Popis: | Elevated levels of contaminants in surface and ground water pose serious and adverse health challenges in the twenty-first century. It is imperative that the quality of life of people without safe drinking water is improved by providing safe, clean and affordable water using appropriate purification technology. Natural clay and rice husk-Na2CO3 modified clay were used to produce expanded clay aggregates adsorbents. Characterizations were done using SEM, XRD, XPS and BET to reveal their salient features. Filtration studies were carried out to ascertain the disinfection assay of E. Coli and removal efficiencies of nitrate and phosphate. Batch adsorption experiments were employed to determine the effect of pH, contact time and adsorbent dosage for effective removal of Arsenic (III) and lead (II) including isotherm models. Aluminosilicates and associated minerals with high surface areas between 456.143–566.998 m2/g and significant adsorption sites were revealed. Log four bacteria disinfection assay was achieved. Reduction efficiencies for phosphate and nitrate for all adsorbents varied from 27.33% to 76% and 10.67% to 46% respectively. High correlation coefficients made Langmuir isotherm model more favourable than Freundlich model. The adsorption capacities for both lead and arsenic were high and reaction was fast, making the adsorbents suitable for water remediation applications. |
| Databáze: | OpenAIRE |
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