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ADSORPSI ION LOGAM Pb(II) dan Cr(III) OLEH POLI 5ALLILKALIKS[4]ARENA TETRAESTER (Adsorption of Pb(II), Cd(II), and Cr(III) by Poly-5-allyl-calix[4]arene tetraester)

https://doi.org/10.22146/jml.18459

Desi Suci Handayani(1*), Jumina Jumina(2), Dwi Siswanta(3), Mustofa Mustofa(4)

(1) UGM
(2) UGM
(3) UGM
(4) UGM
(*) Corresponding Author

Abstract


ABSTRACT

The aim research is application of poly-5-allyl-calix[4]arene tetraester as adsorbent of heavy metal cations. Adsorption was carried out towards Pb(II), Cd(II) and Cr(III) ions in batch system. Several variables including pH, contact time and initial concentration of metal ions were determined. The optimum adsorption conditions were achieved at pH 4.0 for Pb(II) and Cd(II), while at pH 6.0 for Cr(III) ions. In addition, the optimum contact time of Cd(II) and Cr(III) ions adsorption were 135 minutes, while those for Pb(II) ion was 180 minutes. The adsorption kinetics of Pb(II), Cd(II) and Cr(III) ions using the calixarene polymer adsorbent followed a pseudo 2nd order kinetics model, with adsorption rate constants of 10-3, 9x10-3 dan 3,6x10-2 g mole-1 min-1, respectively. Furthermore, The adsorption isotherm of Pb(II) ion tends to follow the Freundlich isotherm, whereas the adsorption of Cd(II) and Cr (III) ions tends to follow the Langmuir isotherm. The adsorption capacity of Pb(II), Cd(II) and Cr(III) metal ions were 187.63, 45.63 and 197.25 μmole/g, with adsorption energy of 23.14, 15.18 and 27.15 KJ / mole, respectively.


ABSTRAK

Penelitian ini bertujuan untuk mengkaji pemanfaatan poli-5-allilkaliks[4]arena tetraester sebagai adsorben kation logam berat. Adsorpsi dilakukan dengan metode batch pada variasi keasaman (pH), waktu kontak dan konsentrasi awal ion logam. Hasil eksperimen menunjukkan bahwa pH optimum adsorpsi adalah pH 4,0 untuk ion logam Pb(II) dan Cd(II), sedangkan untuk Cr(III) pada pH 6,0. Waktu kontak optimum adsorpsi ion logam Cd(II) dan Cr(III) adalah 135 menit, sedangkan untuk ion logam Pb(II) adalah 180 menit. Kajian kinetika adsorpsi menunjukkan bahwa adsorpsi ion logam Pb(II), Cd(II) dan Cr(III) menggunakan adsorben poli-5-allilkaliks[4]arena tetraester mengikuti model kinetika Ho, pseudo orde 2, dengan konstanta laju adsorpsi berturut-turut 10-3, 9x10-3 dan 3,6x10-2 g mol-1 menit-1. Kajian isotherm  menunjukkan bahwa adsorpsi ion logam Pb(II) cenderung mengikuti isotherm Freundlich, sedangkan adsorpsi ion Cd(II) dan Cr(III) cenderung mengikuti isotherm Langmuir. Kapasitas maksimum adsorpsi ion logam Pb(II), Cd(II) dan Cr(III) masing-masing sebesar 187,63; 45,63 dan 197,25 µmol/g, dengan energi adsorpsi berturut-turut 23,14; 15,18 dan 27,15 KJ/mol.


 


Keywords


Poly-5-allyl-calix[4]arene tetraester; adsorption; Cd(II); Pb(II); Cr(III); kinetics adsorption isotherm adsorption




DOI: https://doi.org/10.22146/jml.18459

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