| Summary: | 碩士 === 國立臺北科技大學 === 化學工程與生物科技系化學工程碩士班（碩士在職專班） === 103 === In this stud , We examined the adsorption characteristics of Copper (II) and Zinc (II) onto Purolite S930 Plus from aqueous solution in respect to changes in metal concentration, resin gram and temperature, while changes in pH value of solutions were observed. The results showed that the time to achieve adsorption balance for the Copper (II) single composition solution system and the Zinc (II) single composition solution system are 155mins and 265mins respectively. The adsorption amount per resin gram increased as the metal concentration, but decreased along with rises in resin grams. The results also showed that for the adsorption of both metals, the Freundlich isotherm model fitted the equilibrium data best. In addition, we also get the thermodynamic functions, enthalpy(H), Gibbs energy(G), and entropy(S) changes of adsorption for each metal ion.
In Freundlich isothermal model：
The single system(Cu2+)：ΔＨ：27.1252~219.9092 (J/mol)，ΔＧ：-1482.88~-1146.65 (J/mol)，ΔＳ：4.379705~5.39496 (J/mol·K)
The single system(Zn2+)：ΔＨ：40.0982~129.3631 (J/mol)，ΔＧ：-1509.76~-1146.65 (J/mol)，ΔＳ：410.7753~4.94248 (J/mol·K)
In Langmuir isothermal model：
The single system(Cu2+)：ΔＨ：127.4989~6491.359 (J/mol)，ΔＧ：-12522.24~-6090.473 (J/mol)，ΔＳ：13.633~59.7912 (J/mol·K)
The single system(Zn2+)：ΔＨ：2444.115~3405.4113 (J/mol)，ΔＧ：-8926.3609~-4496.8989 (J/mol)，ΔＳ：24.0519~36.5178 (J/mol·K)
In BET isothermal model：
The single system(Cu2+)：ΔＨ：109.2612~666.3202 (J/mol)，ΔＧ：-8293.69~-6526.77 (J/mol)，ΔＳ：23.5469~27.95911 (J/mol·K)
The single system(Zn2+)：ΔＨ：238.516~580.7255 (J/mol)，ΔＧ：-8365.35~-6169.27(J/mol)，ΔＳ：23.425~26.716 (J/mol·K)
The kinetics experiment results were also correlated with the Pseudo-second-order kinetics model. the kinetics parameters were showed as below：
In the Pseudo-first-order kinetics model：
The single system(Cu2+)：k1= 0.0771~0.41901 s-1，Ea=2076.54 J/mol
The single system(Zn2+)：k1= 0.0111~0.3302 s-1，Ea=68295.6 J/mol
In the Pseudo-second-order kinetics model：
The single system(Cu2+)：k2= 0.7310~1.9748 s-1，Ea=1957.543 J/mol
The single system(Zn2+)：k2=6.3901~12.6934 s-1，Ea=1560.035 J/mol
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