Taguchi optimization design of diameter-controlled synthesis of multi walled carbon nanotubes for the adsorption of Pb(II) and Ni(II) from chemical industry wastewater
| Autor: | Jimoh O. Tijani, Madhavi Srinivasan, Vida Krikstolaityte, Grzegorz Lisak, Andrei Veksha, Jacinta Ijeoma Ani, Titus Chinedu Egbosiuba, Ambali Saka Abdulkareem |
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| Přispěvatelé: | School of Civil and Environmental Engineering, Energy Research Institute @ NTU (ERI@N), Nanyang Environment and Water Research Institute |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Materials science Health Toxicology and Mutagenesis 0208 environmental biotechnology 02 engineering and technology Carbon nanotube 010501 environmental sciences Wastewater 01 natural sciences Ion law.invention Industrial wastewater treatment Taguchi methods Adsorption law Environmental Chemistry Nanoadsorbent 0105 earth and related environmental sciences Materials [Engineering] business.industry Nanotubes Carbon Public Health Environmental and Occupational Health Chemical engineering [Engineering] General Medicine General Chemistry Chemical industry Hydrogen-Ion Concentration Pollution 020801 environmental engineering Taguchi optimization Kinetics Lead Chemical Industry business Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Chemosphere. 266 |
| ISSN: | 1879-1298 |
| Popis: | Herein, Taguchi L9 orthogonal array was used for the first time to optimize synthesis of diameter-controlled multi walled carbon nanotubes (MWCNTs). The nanoadsorbents, MWCNTs5-15 nm and MWCNTs16-25 nm were applied for Pb(II) and Ni(II) ion removal from paint, battery and electroplating wastewater. The results indicated successful synthesis of MWCNTs with diameter distribution ranges of 5-15 nm and 16-25 nm. The synthetized smaller diameter MWCNTs5-15 nm revealed higher Brunauer-Emett-Teller (BET) surface area of 1306 ± 5 m2/g compared to larger diameter MWCNTs16-25 nmwith the surface area of 1245 ± 4 m2/g. They demonstrated excellent adsorption of Pb(II) and Ni(II) ions within the permissible concentration proposed by WHO at pH, contact time, adsorbent dosage and temperature of 5, 60 min, 30 mg/L and 50 °C, respectively. Particularly, MWCNTs5-15 nm possessed high adsorption capacity of 215.38 ± 0.03 mg/g for Pb(II) and 230.78 ± 0.01 mg/g for Ni(II). Again, the maximum adsorption capacity of 201.35 ± 0.02 and 206.40 ± 0.02 mg/g was achieved for Pb(II) and Ni(II) using MWCNTs16-25 nm. All in all, the adsorption capacity of the nanoadsorbents at the investigated diameter range showed higher efficiency compared to other materials for heavy metals elimination from chemical industrial wastewater. Ministry of National Development (MND) National Environmental Agency (NEA) National Research Foundation (NRF) This research was made possible through the financial support of the Petroleum Technology Development Fund, Nigeria (grant number PTDF/ED/LSS/PhD/TCE/123/17). SCARCE is supported by the National Research Foundation, Prime Minister’s Office, Singapore, the Ministry of National Development, Singapore, and National Environment Agency, Ministry of Sustainability and the Environment, Singapore under the Closing the Waste Loop R&D Initiative as part of the Urban Solutions & Sustainability e Integration Fund (Award No. USS-IF-2018-4). |
| Databáze: | OpenAIRE |
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