Comparison the New Kinetics Equation of Non-competitive Sorption Cd(II) and Zn(II) onto Green Sorbent Horse Dung Humic Acid (HD-HA)

Abstract

The new kinetics equation has been proposed and applied to the sorption of Cd(II) and Zn(II) onto green sorbent horse dung humic acid (HD-HA). This work aims to study the new kinetics equation and to compare its parameters with Lagergren and Ho kinetics equation in the same system. HD-HA was extracted and purified by Stevenson’s methods and then characterized by detection of its functional group, UV-Vis spectra, and total acidity. The sorption study of this work was investigated by batch experiment in pH optimum 5. Langmuir’s monolayer sorption capacity (b) of Cd(II) and Zn(II) onto HD-HA was 1.329×10-3 and 1.070×10-3 mole.g-1, respectively. Langmuir equilibrium constant (KL) of Cd(II) and Zn(II) sorption was 5,651 and 6,399 (mole/L)-1, respectively. The kinetics parameters were determined by Lagergren, Ho, and the new kinetics equation. The best linearity (R2) and the most fitted sorbed metal ion in equilibrium (xe) with the experimental data was the Ho kinetics equation. However, the correct value of sorption rate constant (ka) was not really known, because the ka resulted from Ho and Lagergren kinetics equation can not be compared with another parameter and there is no scale to measure the correctness of this value of ka. In this work, the correctness value of ka of the new kinetics equation can be measured by ka/kd equal to K, and this K should be equal to KL. The values of K of Cd(II) (3,452 (mole/L)-1) and and Zn(II) (10,898 (mole/L)-1) were quite similar with KL. Additionally, the value of intercept from linear regression of this new kinetics equation (Cd(II) = 6.8517; Zn(II) = 6.0408) was highly similar with the manually calculation of -ln(xe/ab) (Cd(II) = 7.0638; Zn(II) = 6.9838). These new kinetics equations also reveal that Lagergren sorption rate constant (kLag) is the complex function of ka(ab-xe2)/xe). Copyright © 2018 BCREC Group. All rights reservedReceived: 21st November 2017; Revised: 28th June 2018; Accepted: 3rd July 2018How to Cite: Basuki, R., Ngatijo, Santosa, S.J., Rusdiarso, B. (2018). Comparison the New Kinetics Equation of Non-competitive Sorption Cd(II) and Zn(II) onto Green Sorbent Horse Dung Humic Acid (HD-HA). Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3): 475-488 (doi:10.9767/bcrec.13.3.1774.475-488)Permalink/DOI: https://doi.org/10.9767/bcrec.13.3.1774.475-488

Adsorpsi Methylene Blue pada Nanopartikel Magnetit tersalut Asam Humat: Kajian Isoterm dan Kinetika

“…Isoterm adsorpsi dipelajari melalui aplikasi data adsorpsi variasi konsentrasi MB pada model isotherm: empat variasi Langmuir [22][23], Freundlich [24], Dubinin-Radushkevich (DR) [25], dan Temkin [26]. Kinetika adsorpsi dipelajari melalui aplikasi data variasi waktu pada model kinetika Lagergren (pseudo orde pertama) [27], Ho (pseudo orde kedua) [28], Santosa [29], dan Rusdiarso-Basuki-Santosa (RBS) [30,31]. Lebih jauh, prediksi energi adsorpsi (E) dari data kinetika Santosa dan RBS akan dibahas menyeluruh dalam artikel ini.…”

Adsorption of Pb(II) from Aqueous Solutions onto Humic Acid Modified by Urea-Formaldehyde: Effect of pH, Ionic Strength, Contact Time, and Initial Concentration

“…and RBS [10,[44][45][46]) (Table 5) were used to explore kinetics parameters of Pb(II) adsorption onto HA-UF. The nomenclatures of the symbols are q t (mol/g), which represent the amount Pb(II) that was adsorbed at time t (min); x (mol/L) and x e (mol/L) are the amount of Pb(II) adsorbed on the adsorbent at time t and equilibrium, respectively; X (g/L) in Santosa's kinetics model is w/vmr, where w (g) is the mass of the adsorbent, v (L) is the volume of sorption medium, and m r : the molar weight of adsorbate; C b (mol/L) is the concentration of Langmuir capacity (C b =bw/v); k Lag (min -1 ), k Ho (g/mol.min), k s (L/mol.min), k a (L/mol.min) are the Lagergren, Ho, Santosa, and RBS rate constants, respectively.…”

The Dependency of Kinetic Parameters as a Function of Initial Solute Concentration: New Insight from Adsorption of Dye and Heavy Metals onto Humic-Like Modified Adsorbents

“…Temkin isotherm [47] explains the soluteadsorbent interaction based on the assumption that there is an indirect relationship between sorption energy and their interaction. Temkin isotherm is expressed as: (16) where bT (J/mol) relates to the heat of adsorption, which it decrease linearly with coverage due to solute-adsorbent interaction. AT (L/g) is the equilibrium binding constant corresponding to the maximum binding energy.…”

“…Later, Rusdiarso et al [15] proposed a kinetics model which has similar significance with the Santosa's model. The Rusdiarso et al's model originated from the assumption [15][16][17]: (10) Taking integration of Eq. ( 10) from (C0Cb) to (C0Cb−xex), 0 to x, and 0 to t results (11) Recently, the adsorption rate constant (ka) in the kinetics models reported has not always been constant [18].…”