Unesa Journal of Chemistry
Volume 2, Number 1, 2013

PENENTUAN PH OPTIMUM DAN KAPASITAS ADSORPSI ION LOGAM NI(II) OLEH KOMPOSIT KITOSAN-ALUMINA (DETERMINATION OF OPTIMUM PH AND ADSORPTION CAPACITY OF NI(II) METAL ION BY CHITOSAN-ALUMINA COMPOSITE)

FARDA, ELOK (Department of Chemistry, Universitas Negeri Surabaya)



Article Info

Publish Date
29 Jan 2013

Abstract

Abstrak. Tujuan dari penelitian ini adalah untuk mengetahui pH optimum dan mempelajari kapasitas adsorpsi ion logam Ni(II) oleh komposit kitosan-alumina. Penentuan pH optimum dilakukan dengan menginteraksikan 20 mL adsorbat dengan 0.1 gram adsorben pada variasi pH medium 3, 4, 5, 6 dan 7. Kapasitas adsorpsi ditentukan dengan memvariasi konsentrasi adsorbat ion logam Ni(II) pada 10, 40, 80, 100, 300, 700, 800, 900, 1000, 1200, 1600 dan 1800 mg/L pada pH optimum. Nilai pH optimum adsorpsi dihasilkan pada  pH 5 dengan daya adorpsi sebesar 30.275 %. Kapasitas adsorpsi komposit kitosan-alumina yang diperoleh menggunakan isotherm Langmuir sebesar 7.018x10-4 mol/g dan isotherm Freundlich sebesar 78.126x10-4 mol/g. Kata Kunci: komposit kitosan-alumina, kapasitas adsorpsi. Abstract. The aim of this experiment were to know optimum pH and to study adsorption capacity of Ni(II) metal ion by chitosan-alumina composite. Determination of optimum pH was did to interact 20 mL adsorbate with 0.1 gram adsorbent at variation of medium pH 3, 4, 5, 6 and 7. The adsosrption capacity was determined by various concentration of adsorbate Ni(II) metal ion 10, 40, 80, 100, 300, 700, 800, 900, 1000, 1200, 1600 and 1800 mg/L at Optimum pH. The result of optimum pH was pH 5 with adsorption value 30.275 %. The adsorption capacity of chitosan-alumina composite was 7.018x10-4 mol/g by Langmuir isotherm and 78.126x10-4 mol/g by Freundlich isotherm. Keywords: chitosan-alumina composite, adsorption capacity.

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Journal Info

Abbrev

unesa-journal-of-chemistry

Publisher

Subject

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

Description

UNESA Journal of Chemistry is published online by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia. 60231. Published 3 times a year (January, May and September) Aims and Scope: UNESA Journal ...