Development of biochar based electrode for enhanced removal of Chemical Oxygen Demand (COD) from synthetic wastewater using electrochemical treatment

Abstract

Wastewater Generated From Industrial Activities And Municipals Contains A Variety Of Hazardous Chemicals Dumped To Open Land And Water Bodies. These Chemicals Are Just A Major Source Of Pollution. Wastewater Contains A Large Amount Of Cod, Which Is An Organic And Inorganic Component. This Research Focuses On The Electrochemical Elimination Of Cod From Synthetic Wastewater Utilizing A Biochar-Based Electrode. The Bamboo Biochar (Bbc) Production Parameters Such As Chemical Activator (Koh, Naoh, H2so4, And H3po4), The Percentage Composition Of Activators (30%, 35%, And 40%), Carbonization Temperature (400, 600, And 900 Oc) And Carbonization Time (30, 60, And 90 Minutes) Were Optimized To Improve The Yield. In The Study, 35% Koh/ Bbc And 30% Koh Bbc Yielded Maximum Biochar 29.28% And 27.51%, Respectively, At 600 Oc For 1-Hour Pyrolysis. Mno2 Coating Brings Significant Changes In The Biochar As Per Ftir, Xrd, And Sem Results. Electrode Prepared From 35% Koh/Bbc With And Without Coating 0.01, 0.1, And 0.2 M Mno2 Was Characterized By Cyclic Voltammetry. 0.01 M Mno2/35% Koh Bbc Prepared Electrode Brings Rectangular Like Cv Profile, Mostly Seen In Ideal Electrodes. Additionally, 75 F/G Specific Capacitance And Higher Surface Area Are Indications Of Good Electrode Performance Features Also Occur. A High Energy Density Of 5.1266 Wh/Kg And Power Density Of 615.192 W/Kg Was Also Achieved In 0.01 M Mno2/35% Koh Bbc Based Electrode. The Reason For Maximum Electrode Performance At Lower Mno2 Is That Excess Manganese Lowers The Conductivity Due To Its Low Conductivity Nature. Electrochemical Synthetic Wastewater Treatment Was Investigated With A Series Of Batch Experiments At Nacl Electrolyte Concentration (1?�?2 G/L); Current Densities (7.06-11.76 Ma/Cm2) And 10 V For 2 Hour Contact TimeWere Performed For The Effective Treatment Using The Prepared Electrode. A Higher Removal Of Cod 76.57% Was Achieved At 2 G/L Nacl And 11.76 Ma/Cm2Of Current Density. Here, 3.76 Kwh/Kg Cod Of Minimum Energy Consumption At 2 G/L Nacl Salt And Current Density Of 7.06 Ma/Cm2Resulted. The Use Of An Electrochemical Treatment That Combined Biochar With A Manganese Oxide Electrode Resulted In Improved Electrochemical Properties, Which Aided In Reducing Cod From Glucose Synthetic Wastewater.