Boron removal by coagulation using Al(OH)3 and factorial optimization of data for boron mine wastewater

Mustafa Korkmaz, Cengiz Özmetin, Elif Özmetin, Öznur Ziyanak


In this study, boron removal from synthetic solutions and boron mine wastewater by coagulation method using in-situ formed Al(OH)3 from AlCl3 salt was investigated. The experimental parameter for synthetic solution was solution pH. The optimum condition for synthetic boron solutions was determined as pH (8). The ideal pH value obtained from the synthetic solutions was applied to the boron mine wastewater with concentration of 373.19 mg L-1 by 21×21 full factorial experimental design. The parameters in the design were dosage of aluminium chloride (5, 10 g) and dilution factor (1,10 fold). The aluminium hydroxide provided maximum 100% removal from mine wastewater at optimum conditions. Also, the data obtained were analyzed by means of Pareto chart and surface plot.  P values for all the parameters were found as above 95% confidence limit value (p<0.05). These means that all the parameters are statistically important at 95% confidence level in the developed regression model.

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