Studi Keseimbangan Adsorpsi Merkuri (II) Pada Biomassa Daun Enceng Gondok (Eichhornia crassipes)

Al-Ayyubi, M. Chalid and Barroroh, Himmatul and Dewi, Diana Candra (2010) Studi Keseimbangan Adsorpsi Merkuri (II) Pada Biomassa Daun Enceng Gondok (Eichhornia crassipes). Alchemy, 1 (2). pp. 83-91. ISSN 2086-1710

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Metal ion adsorption research with utilizing Eichhornia crassipes leaf biomass has been done. Metal ions which are ever researched are Cr, Cd, Pb and Ni, but research with utilizing Hg metal ion is never done, so need to be implemented a mercury adsorption research to eichhornia crassipes leaf biomass. Because pH solution is very influential to metal ion adsorption by biomass, so in this research is inspected determining of optimum pH to mercury adsorption. This research is experimental research which is started with determining of optimum pH, this determining of optimum pH is implemented with way of interacting 60 mmg/L mercury metal ion with 0,1 gr eichhornia crassipes leaf biomass for 60 minutes at range of pH 2, 3, 4, 5, 6, 6, 4, 6, 7, 7 and 8, then continued with control so lution production to know the solubility of mercury in every pH. The determination of adsorption capacity, adsorption constanta and adsorption energy are implemented with way of interacting eichhornia crassipes leaf biomass with mercury metal ion by 20, 30, 40, 50, 60, 70, 80, 90, 100 and 150 mmg/L variation of concentration for 60 minutes in pH optimum. Data the result of experiment then processed using the similarity of Langmuir isotherm and Freunlich.. The result of the research indicates that pH 6 is me rcury adsorption optimum pH in eichhornia crassipes leaf biomass. The mercury isotherm adsorption in eichhornia crassipes leaf biomass takes a part of the similarity of langmuir isotherm with point R2 = 0,982, from the similarity of langmuir isotherm gotten adsorption capacity (Xm) in the mount of 4, 806 x 10 - 5 mol/gr with adsorption constanta (K) 27130,85 mol/L and adsorption energy (E) in the mount of 25,46079 kJ/mol.


Penelitian tentang adsorpsi ion logam dengan menggunakan biomassa daun enceng gondok telah banyak dilakukan. Ion logam yang pernah diteliti adalah Cr, Cd, Pb dan Ni, akan tetapi penelitian dengan menggunakan ion logam Hg 2+ belum pernah dilakukan.dalam penelitian ini dikaji tentang keseimbangan adsorpsi Hg 2+ pada biomassa daun enceng gondok. Mengingat pH larutan sangat berpengaruh pada adsorpsi ion logam oleh biomassa, maka dalam penelitian ini dikaji pula penentuan pH optimum terhadap adsorpsi Hg 2+. Penentuan pH optimum dilakukan dengan cara menginteraksikan 25 ml ion logam Hg
2+ 60 mmg/L dengan 0,1 g biomassa daun enceng gondok (Eichhornia crassipes) selama 60 menit pada variasi pH 2; 3; 4; 5; 6; 6,4; 6,7; 7 dan 8. sebagai kontrol dibuat larutan kotrol untuk mengetahui kelarutan Hg 2+ pada berbagai pH. Penetuan kapasitas adsorpsi, konstanta adsorpsi dan energi adsorpsi, dilakukan dengan
cara menginteraksikan biomassa daun enceng gondok (Eichhornia crassipes) dengan ion logam Hg 2+ dengan variasi konsentrasi 20, 30, 40, 50, 60, 70, 80, 90, 100 dan 150 mmg/L selama 60 menit pada pH optimum. Data hasil percobaan kemudian diolah menggunakan persamaan isotermis Langmuir dan Freundlich. Hasil penelitian menunjukkan bahwa pH optimum adsorpsi adalah 6. Isotermis adsorpsi merkuri(II) pada biomassa daun enceng gondok (Eichhornia crassipes) mengikuti persamaan isotermis Langmuir dengan nilai R2 = 0,982, dari persamaan isotermis Langmuir didapatkan kapasitas adsorpsi (Xm)
sebesar 4,806 x 10 - 5 mol/gr dengan konstanta adsorpsi (K) 27130,85 L/mol dan energi adsorpsi (E) sebesar 25,46079 kJ/mol.

Item Type: Journal Article
Keywords: adsorption, mercury, eichornia crassipes
Subjects: 03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl. Structural) > 030602 Chemical Thermodynamics and Energetics
Divisions: Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User: Himmatul Barroroh
Date Deposited: 26 Feb 2016 05:57


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