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Defluoridation of Groundwater Using Electrocoagulation Followed by Adsorption
The present investigation aims at removing excess fluoride from spiked groundwater to the BIS prescribed drinking water standards of 1.0–1.5 mgL−1 using electrochemical coagulation (EC) followed by adsorption. A set of batch EC experiments were conducted for varied initialF concentration and varied cell voltage by keeping a constant ET of 60 min. The optimum operating conditions were determined by running a series of batch experiments employing 6 number of electrodes at F0 = 5, 10, 15, 20, and 25 mgL−1. The varying cell voltage of 8, 12, 18, and 24 V was used. Batch EC studies revealed that, the highest treatment efficiency was obtained for the largest current input, i.e., 24 V. Fluoride concentration of 15 mgL−1 was found to be the optimum initial concentration with respect to maximum fluoride and solids removal. These optimum operating conditions were incorporated in the continuous treatment processes carried out at different flow rates and different depths of sand. It was observed from the continuous studies that with the increase in flow rate and there was decrease in the fluoride removal efficiency. Increase in the depth of sand increases fluoride removal rate as the surface area available for adsorption will be more. Flow rate of 4lph and depth of sand as 45 cm showed maximum fluoride removal efficiency of 94.6%.
Defluoridation of Groundwater Using Electrocoagulation Followed by Adsorption
The present investigation aims at removing excess fluoride from spiked groundwater to the BIS prescribed drinking water standards of 1.0–1.5 mgL−1 using electrochemical coagulation (EC) followed by adsorption. A set of batch EC experiments were conducted for varied initialF concentration and varied cell voltage by keeping a constant ET of 60 min. The optimum operating conditions were determined by running a series of batch experiments employing 6 number of electrodes at F0 = 5, 10, 15, 20, and 25 mgL−1. The varying cell voltage of 8, 12, 18, and 24 V was used. Batch EC studies revealed that, the highest treatment efficiency was obtained for the largest current input, i.e., 24 V. Fluoride concentration of 15 mgL−1 was found to be the optimum initial concentration with respect to maximum fluoride and solids removal. These optimum operating conditions were incorporated in the continuous treatment processes carried out at different flow rates and different depths of sand. It was observed from the continuous studies that with the increase in flow rate and there was decrease in the fluoride removal efficiency. Increase in the depth of sand increases fluoride removal rate as the surface area available for adsorption will be more. Flow rate of 4lph and depth of sand as 45 cm showed maximum fluoride removal efficiency of 94.6%.
Defluoridation of Groundwater Using Electrocoagulation Followed by Adsorption
Lecture Notes in Civil Engineering
Narasimhan, M. C. (editor) / George, Varghese (editor) / Udayakumar, G. (editor) / Kumar, Anil (editor) / Deepthi, B. P. (author) / Shreyas, B. V. (author) / Vishwanath, K. N. (author)
2020-09-29
18 pages
Article/Chapter (Book)
Electronic Resource
English
Electrocoagulation (EC) , Electrocoagulation time (ET) , Cell voltage (V) , Fluoride (F) , Adsorption Engineering , Building Materials , Geoengineering, Foundations, Hydraulics , Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution , Transportation Technology and Traffic Engineering , Remote Sensing/Photogrammetry , Sustainable Development
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