Abstract
Synthetic dyes are one of the most important contaminants in textile wastewater, which are often toxic and carcinogenic. This study aimed to determine the efficiency of coagulation and flocculation process using polyferric chloride (PFC) and polytitanium tetrachloride (PTC) in removing Reactive Blue 19 (RB19) anionic dye from aqueous solution. This laboratory-scale study examined coagulant preparation, the effect of pH (3–11), concentration of PFC and PTC coagulants (100–500 mg/L), and initial dye concentration (70–250 mg/L). The results showed that the dye removal efficiency of PFC was 92.37% at an optimum pH of 9, an optimal dose of 350 mg/L, and dye concentration of 150 mg/L. The dye removal efficiency of PTC was 99.83% at an optimum pH of 7, optimal dose of 350 mg/L, and dye concentration of 200 mg/L. The correlation coefficient between coagulant dose (r = 0.91, p = 0.001) and initial dye concentration (r = 0.83, p = 0.01) was significant with dye removal efficiency for PTC. Based on the results, it can be concluded that the PTC with higher removal efficiency, lower coagulant dose, lower effects on solution pH, and higher density of settled sludge has better efficiency to remove RR19 dye from colored wastewater compared to PFC.
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Acknowledgements
This study was the result of a research project (99075) approved by the Student Research Committee of Rafsanjan University of Medical Sciences with the ethics code of IR.RUMS.REC.1399.056 approved. Thanks are owed to Rafsanjan University of Medical Sciences for their support.
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HE contributed to conceptualization, methodology, formal analysis, and investigation, writing—original draft preparation, writing—review and editing, supervision. TZM contributed to conceptualization, methodology, writing—original draft preparation, writing—review and editing.
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This study was the result of a research project (99075) approved by the Student Research Committee of Rafsanjan University of Medical Sciences with the ethics code of IR.RUMS.REC.1399.056 approved.
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Eslami, H., Zarei Mahmoudabadi, T. Modified coagulation processes using polyferric chloride and polytitanium tetrachloride for the removal of anionic dye from aqueous solution. Int. J. Environ. Sci. Technol. 19, 1811–1818 (2022). https://doi.org/10.1007/s13762-021-03293-3
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DOI: https://doi.org/10.1007/s13762-021-03293-3