Removal of Trace Cu 2+ from Water by Thermo-Modified Micron Bamboo Charcoal and the Effects of Dosage

Xinmei Li, Wenqian Gui, Uulen Batzorig, Rong Zhang (), Hui Li and Dandan Pan
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Xinmei Li: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China
Wenqian Gui: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China
Uulen Batzorig: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China
Rong Zhang: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China
Hui Li: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China
Dandan Pan: School of Environment & Resources, Anhui Agricultural University, Hefei 230036, China

Sustainability, 2024, vol. 16, issue 17, 1-13

Abstract: Chronic copper intoxication via drinking water induces diseases and physiological toxicity. Bamboo charcoal has been applied in the treatment of copper (Cu 2+ ) in water. However, the adsorption by micron bamboo charcoal (MBC) of trace Cu 2+ in tap drinking water and the underlying factors behind it have not been sufficiently reported. In this study, to improve the adsorption by MBC of trace levels of Cu 2+ in drinking water, MBC was thermo-modified and characterized. Through batch experiments, the adsorption equilibrium was analyzed, and isotherm models were simulated. The removal rates and the optimization were investigated through a general full factorial design including the thermo-modified temperature (MT), initial concentration (C 0 ), and dosage. The results indicated that the thermo-modification significantly improved the removal by MBC of Cu 2+ at trace level C 0 . The satisfactorily low level of 0.12 ± 0.01 mg⋅L −1 was achieved in the range of C 0 from 0.5 to 2.0 mg⋅L −1 within the short contact time of 0.5 h. The processes conformed to the Freundlich and Langmuir adsorption isothermal models at a C 0 lower than 4.0 mg⋅L −1 and higher than 8.0 mg⋅L −1 . The correlation between C 0 and dosage played an important role in the removal of Cu 2+ . This work proposes the application of the ecofriendly material MBC and an optimization mode in the removal of trace Cu 2+ from tap drinking water. It is also revealed that the positive and negative correlation and the “critical point” of the removal rate with dosage depend on the initial concentrations.

Keywords: micron bamboo charcoal; copper; adsorption; water; dosage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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