Process for the Biological Removal of Fe (II) from Reconstituted Waters on a Support of Filter Material with Coated Jujube Seeds  

作　　者：Mamadou Faye Falilou Mbacké Sambe Alpha Ousmane Toure Mouhamed Ndoye Codou Guèye Mar Diop Mamadou Faye;Falilou Mbacké Sambe;Alpha Ousmane Toure;Mouhamed Ndoye;Codou Guèye Mar Diop(Water, Energy, Environment and Industrial Processes Laboratory, Ecole Supérieure Polytechnique (ESP), Dakar, Senegal;Cheikh Anta Diop University, Dakar, Senegal)

机构地区：[1]Water, Energy, Environment and Industrial Processes Laboratory, Ecole Supérieure Polytechnique (ESP), Dakar, Senegal [2]Cheikh Anta Diop University, Dakar, Senegal

出　　处：《Journal of Geoscience and Environment Protection》2022年第12期65-76,共12页地球科学和环境保护期刊（英文）

摘　　要：Three beakers for removing Fe (II) in reconstituted water (doped with FeSO₄) were built and tested. Given the set operating conditions ([O₂] > 4 mg·L^-1, P_atm = 1.013 bar, T = 25°C ± 1°C and [Fe²⁺]₀ = 0.5 to 2 mg·L^-1), removal of iron was caused by biological and possibly physical and chemical oxidation because there is a quantity of free oxygen in the medium. The extent of each type of oxidation has not been evaluated as it specifically studies the biological degradation of iron in these beaker tests by setting the operating conditions (pH > 6.5, dissolved oxygen from 0 to 8 mg·L^-1, Redox Potential from 100 to 400 mV). The experimental studies focused particularly on the measurements of maximum wavelength, conversion efficiencies from Fe (II) to Fe (III), the effect of the Fe (II) concentration, the influence of pH, the action of the temperature of the prepared solutions and the effect of O₂ concentration under specified operating conditions. It noticed precipitated amounts of iron deposited at the bottom of the beakers. Thus, the low concentrations of Fe (II) detected in the influent after the biological oxidation operation could be attributed to microorganisms that consume iron as a substrate.Three beakers for removing Fe (II) in reconstituted water (doped with FeSO₄) were built and tested. Given the set operating conditions ([O₂] > 4 mg·L^-1, P_atm = 1.013 bar, T = 25°C ± 1°C and [Fe²⁺]₀ = 0.5 to 2 mg·L^-1), removal of iron was caused by biological and possibly physical and chemical oxidation because there is a quantity of free oxygen in the medium. The extent of each type of oxidation has not been evaluated as it specifically studies the biological degradation of iron in these beaker tests by setting the operating conditions (pH > 6.5, dissolved oxygen from 0 to 8 mg·L^-1, Redox Potential from 100 to 400 mV). The experimental studies focused particularly on the measurements of maximum wavelength, conversion efficiencies from Fe (II) to Fe (III), the effect of the Fe (II) concentration, the influence of pH, the action of the temperature of the prepared solutions and the effect of O₂ concentration under specified operating conditions. It noticed precipitated amounts of iron deposited at the bottom of the beakers. Thus, the low concentrations of Fe (II) detected in the influent after the biological oxidation operation could be attributed to microorganisms that consume iron as a substrate.

关 键 词：BIOFILM Batch Test Biological Oxidation Iron Removal BEAKER Doped Water 

分 类 号：TG1[金属学及工艺—金属学]