Residual organics removal from manganese electrochemical solution using combined Fenton oxidation process with adsorption over activated carbon

The removal of residual organics from manganese (Mn) electrochemical solution using combined Fenton oxidation process with adsorption over activated carbon (AC) was investigated. The effect of operating conditions such as dosage of H 2 O 2 , H 2 O 2 /Fe 2+ ratio, initial pH value, reaction temperatu...

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Veröffentlicht in:Environmental science and pollution research international 2020-12, Vol.27 (35), p.44240-44248
Hauptverfasser: Cui, Jingxian, Li, Xueping, Muhammad, Yaseen, Shi, Chongyi, Li, Haibin, Su, Haifeng
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container_issue 35
container_start_page 44240
container_title Environmental science and pollution research international
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creator Cui, Jingxian
Li, Xueping
Muhammad, Yaseen
Shi, Chongyi
Li, Haibin
Su, Haifeng
description The removal of residual organics from manganese (Mn) electrochemical solution using combined Fenton oxidation process with adsorption over activated carbon (AC) was investigated. The effect of operating conditions such as dosage of H 2 O 2 , H 2 O 2 /Fe 2+ ratio, initial pH value, reaction temperature, and reaction time on Fenton oxidation was studied. Experimental results indicated that a maximum chemical oxygen demand (COD) of 83.2% was obtained under the optimized set of conditions: H 2 O 2 concentration of 0.15 mol/L, H 2 O 2 /Fe 2+ molar ratio of 3, initial pH value of 3, reaction temperature of 50 °C, and reaction time of 90 min. The leaching solution was furthered treated over AC and COD removal rate increased to 93.1% under 3.75 g/L dosage of AC, adsorption temperature of 70 °C, and adsorption time of 120 min. The adsorption mechanism of Mn over AC was detailly investigated, while the porous texture of AC was studied by nitrogen adsorption isotherm.
doi_str_mv 10.1007/s11356-020-10290-5
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The effect of operating conditions such as dosage of H 2 O 2 , H 2 O 2 /Fe 2+ ratio, initial pH value, reaction temperature, and reaction time on Fenton oxidation was studied. Experimental results indicated that a maximum chemical oxygen demand (COD) of 83.2% was obtained under the optimized set of conditions: H 2 O 2 concentration of 0.15 mol/L, H 2 O 2 /Fe 2+ molar ratio of 3, initial pH value of 3, reaction temperature of 50 °C, and reaction time of 90 min. The leaching solution was furthered treated over AC and COD removal rate increased to 93.1% under 3.75 g/L dosage of AC, adsorption temperature of 70 °C, and adsorption time of 120 min. 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The effect of operating conditions such as dosage of H 2 O 2 , H 2 O 2 /Fe 2+ ratio, initial pH value, reaction temperature, and reaction time on Fenton oxidation was studied. Experimental results indicated that a maximum chemical oxygen demand (COD) of 83.2% was obtained under the optimized set of conditions: H 2 O 2 concentration of 0.15 mol/L, H 2 O 2 /Fe 2+ molar ratio of 3, initial pH value of 3, reaction temperature of 50 °C, and reaction time of 90 min. The leaching solution was furthered treated over AC and COD removal rate increased to 93.1% under 3.75 g/L dosage of AC, adsorption temperature of 70 °C, and adsorption time of 120 min. The adsorption mechanism of Mn over AC was detailly investigated, while the porous texture of AC was studied by nitrogen adsorption isotherm.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s11356-020-10290-5</doi><tpages>9</tpages></addata></record>
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subjects Activated carbon
Adsorption
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Chemical oxygen demand
Dosage
Earth and Environmental Science
Ecotoxicology
Electrochemistry
Environment
Environmental Chemistry
Environmental Health
Environmental science
Hydrogen peroxide
Iron
Leaching
Manganese
Oxidation
Oxidation process
pH effects
Reaction time
Research Article
Waste Water Technology
Water Management
Water Pollution Control
title Residual organics removal from manganese electrochemical solution using combined Fenton oxidation process with adsorption over activated carbon
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