Safeguarding drinking water: A brief insight on characteristics, treatments and risk assessment of contamination

Kundu, Debajyoti; Dutta, Deblina; Joseph, Anuja; Jana, Ankan; Samanta, Palas; Bhakta, Jatindra Nath; Alreshidi, Maha Awjan

doi:10.1007/s10661-024-12311-z

Cited by 2 publications

(1 citation statement)

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“…Among all pollutants, heavy metals are of paramount concern due to their toxic nature and the potential risk of accumulation in living organisms through food chains (Silva et al, 2013;Dutta et al, 2019;Svetlana et al, 2024). For instance, hexavalent chromium Cr(VI) is a highly toxic heavy metal, with a maximum permissible quantity of 0.05 mg/L in potable water, as per the Environmental Protection Agency (EPA) guidelines (Jiang et al, 2015;Ball and Izbicki, 2004;Vaiopoulou and Gikas, 2020;Kundu et al, 2024). It primarily emanates from industrial processes such as metal processing, metal mining and smelting, electroplating, leather and dyeing, among others (Sharma et al, 2022;Gning et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

Green clay materials applied in packed bed columns for adsorption of hexavalent chromium from aqueous solutions

Eloussaief,

Dammak,

Ghrab

et al. 2024

Preprint

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The removal of hazardous metal ions from polluted water is a crucial process aimed at enhancing water quality. In this study, we conducted a dynamic adsorption investigation utilizing natural green clay for the removal of hexavalent chromium from aqueous solutions. The material underwent characterization through various techniques, including fluorescence spectrometry (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and nitrogen-physisorption (BET). Column tests of green clay material and sand mixtures were performed to evaluate sorption in dynamic systems. Adsorption conditions were examined by varying the initial Cr6+ concentration, flow rate and column height. The maximum purification was achieved at a concentration of 50 mg/L, a flow rate of 3mL/min and a bed height of 12 cm. The mathematical models of Bohart-Adams, Thomas, and Yoon-Nelson were employed to analyze experimental data and predict breakthrough curves in continuous adsorption. Through comparison of R2 values, it was determined that the Yoon-Nelson and Thomas diffusion models effectively capture and accurately describe the experimental data. The results obtained indicate a potential expansion of fixed-bed adsorption for the heavy metals treatment in industrial-scale wastewater. Additionally, the natural green clay material exhibited remarkable reusability and showed promising characteristics for various environmental and industrial applications.

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