In this study, Mucuna flagellipes seed extract was applied in the coagulation-flocculation of produced water （PW）. Process parameters such as pH, dosage, and settling time were investigated. Process kinetics was als...In this study, Mucuna flagellipes seed extract was applied in the coagulation-flocculation of produced water （PW）. Process parameters such as pH, dosage, and settling time were investigated. Process kinetics was also studied. Instrumental characterization of mucuna seed （MS）, mucuna seed coagulant （MSC）, and post effluent treatment settled sludge （PTSS） were carried out. The optimum decontamination efficiency of 95 % was obtained at 1 g/L MSC dosage, PW pH of 2, and rate constant of 0.0001 （L/g/s）. Characterization results indicated that MS, MSC, and PTSS were of network structure, primitive lat- tice, and thermally stable. It could be concluded that MSC would be potential biomass for the treatment of produced water under the experimental conditions.展开更多
Adsorptive component of produced water(PW)coagulation using Tympanotonos Fuscatus coagulant(TFC)was studied.Influence of the following parameters:pH,coagulant dose,settling time,and temperature were investigated.The f...Adsorptive component of produced water(PW)coagulation using Tympanotonos Fuscatus coagulant(TFC)was studied.Influence of the following parameters:pH,coagulant dose,settling time,and temperature were investigated.The functional group,crystalline nature,morphological observation and thermal characteristics of the sample were evaluated.Equilibrium data were analyzed using Langmuir,Freundlich,Temkin,Frumkin,and Dubinin-Radushkevich(D-R)adsorption isotherms.The kinetics data were fitted to reversible first order,pseudo-first-order,pseudo-second-order,elovich,intra-particle diffusion and Boyd kinetic models.Adsorption Gibbs energy,enthalpy and entropy were evaluated.Equilibrium data best fitted the Langmuir isotherm(R^2>0.99;X^2<1.6;SSE<1.6).Reversible first order model correlated best to the kinetics data.The values of process average Gibb's free energy,enthalpy and entropy were 30.35,27.88 and 0.1891 kJ/mol,respectively.The process was spontaneous,feasible and endothermic in nature.The maximum efficiency of 83.1%was favored at pH 2.0.This study indicated significant adsorptive component,while using Tympanotonos Fuscatus extract as readily available,renewable,ecofriendly bio e coagulant for efficient treatments of PW.展开更多
文摘In this study, Mucuna flagellipes seed extract was applied in the coagulation-flocculation of produced water （PW）. Process parameters such as pH, dosage, and settling time were investigated. Process kinetics was also studied. Instrumental characterization of mucuna seed （MS）, mucuna seed coagulant （MSC）, and post effluent treatment settled sludge （PTSS） were carried out. The optimum decontamination efficiency of 95 % was obtained at 1 g/L MSC dosage, PW pH of 2, and rate constant of 0.0001 （L/g/s）. Characterization results indicated that MS, MSC, and PTSS were of network structure, primitive lat- tice, and thermally stable. It could be concluded that MSC would be potential biomass for the treatment of produced water under the experimental conditions.
基金Chemical Engineering Department,Nnamdi Azikiwe University,Awka,NigeriaWater Resources Center,Civil and Environmental Engineering Department,Texas Tech University,Lubbock,Texas,USAFulbright Program,Council for International Exchange of Scholars(CIES),Washington,DC 20005-2403 USA.
文摘Adsorptive component of produced water(PW)coagulation using Tympanotonos Fuscatus coagulant(TFC)was studied.Influence of the following parameters:pH,coagulant dose,settling time,and temperature were investigated.The functional group,crystalline nature,morphological observation and thermal characteristics of the sample were evaluated.Equilibrium data were analyzed using Langmuir,Freundlich,Temkin,Frumkin,and Dubinin-Radushkevich(D-R)adsorption isotherms.The kinetics data were fitted to reversible first order,pseudo-first-order,pseudo-second-order,elovich,intra-particle diffusion and Boyd kinetic models.Adsorption Gibbs energy,enthalpy and entropy were evaluated.Equilibrium data best fitted the Langmuir isotherm(R^2>0.99;X^2<1.6;SSE<1.6).Reversible first order model correlated best to the kinetics data.The values of process average Gibb's free energy,enthalpy and entropy were 30.35,27.88 and 0.1891 kJ/mol,respectively.The process was spontaneous,feasible and endothermic in nature.The maximum efficiency of 83.1%was favored at pH 2.0.This study indicated significant adsorptive component,while using Tympanotonos Fuscatus extract as readily available,renewable,ecofriendly bio e coagulant for efficient treatments of PW.
