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Ali I, Tatiana K, Zaw Htay T, Thu Aung H, Ekaterina M, Nahid Siddiqui M, Almalki ASA, Alhadhrami A, Alsubaie A, Hameed AM, Alharbi A. Economic and fast electro-flotation extraction of heavy metals from wastewater. ENVIRONMENTAL TECHNOLOGY 2022; 43:1-10. [PMID: 36052577 DOI: 10.1080/09593330.2022.2120831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Fast electroflotation extraction of heavy metals from wastewater is described. The results of experimental investigations of the extraction of iron, aluminium and chromium hydroxides from aqueous solutions in the presence of surfactants of various natures and ions of calcium by electroflotation are presented. It was found that the presence of Ca2+ in the solution at a concentration of 0.5 g/L reduced the degree of electroflotation extraction of Al(OH)3, Fe(OH)3, Cr(OH)3 regardless of the nature of the electrolyte. The addition of surfactants in the system in the presence of Ca2+ increased the amount of extraction of the dispersed phase. The greatest effect is achieved with the help of anionic surfactant sodium dodecyl sulphate, while the degree of extraction reached 98%. The high efficiency of the process of electroflotation extraction of the dispersed phase was due to the hydrophobization of the particle surface owing to the adsorption of surfactants on the surface of hydroxides. The recent method is useful to treat wastewater contaminated with aluminium, iron and chromium metal ions. The reason is that this method is very fast working within 20 min; Moreover, pH 7.0 working made this method ideal for utilisation in natural water treatment economically.
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Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India
| | - Kon'kova Tatiana
- Department of Inorganic Substances Technology and Electrochemical Processes, Mendeleev University of Chemical Technology, Moscow, Russian Federation
| | - Than Zaw Htay
- Department of Inorganic Substances Technology and Electrochemical Processes, Mendeleev University of Chemical Technology, Moscow, Russian Federation
| | - Hein Thu Aung
- Department of Inorganic Substances Technology and Electrochemical Processes, Mendeleev University of Chemical Technology, Moscow, Russian Federation
| | - Mishenko Ekaterina
- Department of Nanomaterials and Nanotechnology, Mendeleev University of Chemical Technology, Moscow, Russian Federation
| | - Mohammad Nahid Siddiqui
- Department of Chemistry and IRC Membranes and Water Security, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, Saudi Arabia
| | | | - A Alhadhrami
- Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia
| | - Abdullah Alsubaie
- Department of Physics, Faculty of Science, Taif University, Taif, Saudi Arabia
| | - Ahmed M Hameed
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Ahmed Alharbi
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
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Zhang S, Zhang Y, Fu L, Jing M. A chitosan fiber as green material for removing Cr(VI) ions and Cu(II) ions pollutants. Sci Rep 2021; 11:22942. [PMID: 34824368 PMCID: PMC8617153 DOI: 10.1038/s41598-021-02399-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 11/16/2021] [Indexed: 11/25/2022] Open
Abstract
The application shell uses cellulose as a green and recyclable fiber material, which has great value in the field of water treatment environment. Varying factors, including pH value, dosage of CS, reaction time and original Cr(VI) ions and Cu(II) ions were studied to investigate the Cr(VI) and Cu(II) ions removal efficiency. The obtained shell trichlorocellulose has better permeability to copper ions, which is mainly due to the different oxide states of copper ions and chromium ions in a pH environment, which lead to different combinations. The price of shell cellulose neutralization is relatively low. Metal ions have better absorption properties. The kinetic and thermodynamic characteristics of the adsorption process of copper ions by chitosan yarns were discussed. The adsorption process of copper ions conformed to the quasi-second-order kinetic equation. It can be fitted by Langmuir isotherm. The adsorption of copper ions by the yarn is a spontaneous thermal reaction with both physical adsorption and chemical adsorption. Compared with chromium ions, chitosan fibers have better adsorption of copper ions, which is mainly because the amino groups in chitosan fibers can have good chelation with copper ions. SEM, FTIR, XRD were used to characterize the adsorption of copper ions by chitosan fibers, and the mechanism of the adsorption of metal ions by chitosan fibers was explored.
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Affiliation(s)
- Shujie Zhang
- School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China.
| | - Yating Zhang
- School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Lisong Fu
- School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Mengke Jing
- School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
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Abstract
Attachment of particles and droplets to bubbles—the latter being of various fine sizes and created by different techniques (as described in detail)—forms the basis of flotation, a process which indeed was originated from mineral processing. Nevertheless, chemistry often plays a significant role in this area, in order for separation to be effective, as stressed. This (brief) review particularly discusses wastewater treatment applications and the effect of bubble size (from nano- to micro-) on the flotation process.
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