Vol. 6, Issue 3 (2018)
The effectiveness of calcium hydroxide and sodium hydroxide as neutralizer in coagulation for reducing fluoride in hazardous wastewater
Author(s): Jenny Anna Margaretha, Candra Irawan, Poppy Sri Lestari, Azkiyah Rahma and Erizal Tanjung
Abstract: The use of coagulant in Hazardous wastewater treatment containing Fluoride can decrease the pH of waste water, so calcium hydroxide and sodium hydroxide compound has been added in the process which can increase the pH value. This experiment consists of the optimum dose determination and the test phases. The optimum dose determination phase was performed by coagulation process using jar test and testing phase on pH, fluoride content, total suspended solids, total dissolved solids, and Chemical Oxygen Demand (COD). The use of calcium hydroxide and sodium hydroxide to precipitate fluoride ions in wastewater was then tested for its effectiveness. The optimum dosage of coagulant to precipitate liquid waste of Hazardous wastewater containing fluoride was 2,222 mg/L. The addition of coagulant PFS 2,222 mg/L with a neutralizing agent of calcium hydroxide 2,500 mg/L (PFS/Ca (OH)2 to decrease fluoride content, total suspended solids and COD more effective than PFS 2,222 mg/L with a neutralizing agent of sodium hydroxide 1,400 mg/L (PFS/NaOH).
Pages: 786-791 | 1200 Views 563 Downloads
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How to cite this article:
Jenny Anna Margaretha, Candra Irawan, Poppy Sri Lestari, Azkiyah Rahma, Erizal Tanjung. The effectiveness of calcium hydroxide and sodium hydroxide as neutralizer in coagulation for reducing fluoride in hazardous wastewater. Int J Chem Stud 2018;6(3):786-791.
