77 research outputs found
Defluoridation of drinking water using a new flow column-electrocoagulation reactor (FCER) - Experimental, statistical, and economic approach.
A new batch, flow column electrocoagulation reactor (FCER) that utilises a perforated plate flow column as a mixer has been used to remove fluoride from drinking water. A comprehensive study has been carried out to assess its performance. The efficiency of fluoride removal (R%) as a function of key operational parameters such as initial pH, detention time (t), current density (CD), inter-electrode distance (ID) and initial concentration (C0) has been examined and an empirical model has been developed. A scanning electron microscopy (SEM) investigation of the influence of the EC process on morphology of the surface of the aluminium electrodes, showed the erosion caused by aluminium loss. A preliminary estimation of the reactor's operating cost is suggested, allowing for the energy from recycling of hydrogen gas hydrogen gas produced amount. The results obtained showed that 98% of fluoride was removed within 25 min of electrolysis at pH of 6, ID of 5 mm, and CD of 2 mA/cm(2). The general relationship between fluoride removal and operating parameters could be described by a linear model with R(2) of 0.823. The contribution of the operating parameters to the suggested model followed the order: t > CD > C0 > ID > pH. The SEM images obtained showed that, after the EC process, the surface of the anodes, became non-uniform with a large number of irregularities due to the generation of aluminium hydroxides. It is suggested that these do not materially affect the performance. A provisional estimate of the operating cost was 0.379 US $/m(3). Additionally, it has been found that 0.6 kW/m(3) is potentially recoverable from the H2 gas
Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay
Electrodialysis for fluoride and nitrate removal from synthesized photovoltaic industry wastewater
Removal of fluoride, SDS, ammonia and turbidity from semiconductor wastewater by combined electrocoagulation–electroflotation
Removal of fluoride and turbidity from semiconductor industry wastewater by combined coagulation and electroflotation
Statistical optimizing of electrocoagulation process for the removal of Cr(VI) using response surface methodology and kinetic study
Acid treated RHWBAC electrode performance for Cr(VI) removal by capacitive deionization and CFD analysis study
Coagulation as a Post-Treatment Method for the Defluoridation of Photovoltaic Cell Manufacturing Wastewater
Simultaneous removal of hexavalent chromium and COD from industrial wastewater by bipolar electrocoagulation
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