Studi keseimbangan adsorpsi merkuri (II) pada biomassa daun enceng gondok (Eichhornia crassipes) yang diimmobilisasi pada matriks polisilikat

Barroroh, Himmatul and Khalifah, Susi Nurul and Dewi, Diana Candra (2008) Studi keseimbangan adsorpsi merkuri (II) pada biomassa daun enceng gondok (Eichhornia crassipes) yang diimmobilisasi pada matriks polisilikat. Presented at Seminar Nasional Kimia XVIII, July 10th 2008, Yogyakarta. (Unpublished)

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Abstract

ABSTRACT:

Binding metal ion by biomass has a weakness that is easily degrade by microbe, therefore it was necessary to immobilize biomassa plant on a matrix. This research was focused to study mercury (II) equilibrium adsorption on immobilized water hyacinth leaf biomass at polysilica matrix and matrix interaction with biomass.

The interaction of polysilica matrix with biomassa leaf of water hyacinth was determined by using FTIR. The determination of adsorption capacity, adsorption constant and energy of adsorption mercury (II) has done by interact of 25 ml Hg2+ aquous solutions with concentration, 20, 30, 40, 50, 60, 70, 80, 90, 100 and 150 mg/L on optimum pH during 60 minute with biomass. The result of experiment data then was processed by using adsorption isothermic equation of Langmuir and Freundlich.

The result of research shows that there were two possibilities interaction between polisilikat matrix with biomassa leaf of water hyacinth. First, that biomassa leaf of water hyacinth was trapped into polysilica matrix, this is the most dominant interaction, and second, that the interaction was happened between active site Si-OH with group of NH2 and COOH. This is based on the loss of absorption spectra of Si-OH at wave number of 3601,82 cm-1, 3503,45 cm-1, 3410,68 cm-1. Adsorption Isothermic of mercury (II) on biomassa leaf of water hyacinth (Eichhornia Crassipes) which diimmobilization at polysilica matrix followed isothermic equation of Langmuir with R2 value = 0,982, but the active site of interaction is heterogenous, with adsorption capacities (Xm) of 4,649 x 10-5 mol/g, adsorption constant of (K) 11334,796 mol/L and energy adsorption (E) equal to 23,28585 kJ/mol.

ABSTRAK:

Pengikatan ion logam oleh biomassa mempunyai kelemahan yaitu mudah terdegradasi oleh mikroba, maka dilakukan immobilisasi biomassa tumbuhan pada suatu matriks. Penelitian ini difokuskan pada studi keseimbangan adsorpsi merkuri(II) pada biomassa daun enceng gondok yang diimmobilisasi pada matriks polisilikat dan interaksi matriks dengan biomassa.

Interaksi matriks polisilikat dengan biomassa daun enceng gondok ditentukan dengan menggunakan FTIR. Penentuan kapasitas adsorpsi, konstanta adsorpsi dan energi adsorpsi merkuri(II) dilakukan dengan cara menginteraksikan 25 ml larutan Hg2+ dengan konsentrasi, 20, 30, 40, 50, 60, 70, 80, 90, 100 dan 150 mg/L pada pH optimum selama 60 menit dengan biomassa terimobilisasi. Data hasil percobaan kemudian diujikan terhadap persamaan isotermis adsorpsi Langmuir dan Freundlich

Hasil penelitian menunjukkan bahwa terdapat dua kemungkinan jenis interaksi antara matriks polisilikat dengan biomassa daun enceng gondok. Pertama, biomassa daun enceng gondok terjebak dalam matriks polisilikat, ini adalah interaksi yang paling dominan, kedua, interaksi terjadi antara situs aktif Si-OH dengan gugus NH2 dan COOH. Hal ini didasarkan dengan hilangnya spektra serapan Si-OH pada bilangan gelombang 3601,82 cm-1, 3503,45 cm-1, 3410,68 cm-1. Isotermis adsorpsi merkuri(II) pada biomassa daun enceng gondok (Eichhornia crassipes) yang diimmobilisasi pada matriks polisilikat mengikuti persamaan isotermis Langmuir dengan nilai R2 = 0,982, akan tetapi memiliki jenis situs aktif yang heterogen, dengan kapasitas adsorpsi (Xm) sebesar 4,649 x 10-5 mol/g, konstanta adsorpsi (K) 11334,79 mol/L dan energi adsorpsi (E) sebesar 23,28 kJ/mol.

Item Type: Seminar and Workshop
Keywords: mercury (II), water hyacinth (Eichhornia crassipes), immobilization, polysilica matrix. merkuri(II), enceng gondok (Eichhornia crassipes), immobilisasi, matriks polisilikat.
Subjects: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry
03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl. Structural) > 030603 Colloid and Surface Chemistry
Divisions: Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User: Himmatul Barroroh
Date Deposited: 29 Jan 2017 01:16

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