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KARAKTERISTIK PENGIKATAN ION Cd(II) dan Cu(II) DALAM PEMBUATAN HIBRIDA AMINO-SILIKA IMPRINTED IONIK Buhani, Buhani; Narsito, Narsito; Nuryono, Nuryono; Kunarti, Eko Sri
Jurnal Sains dan Terapan Kimia Vol 5, No 2 (2011)
Publisher : Jurnal Sains dan Terapan Kimia

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Abstract

Karakteristik pengikatan ion Cd(II) dan Cu(II) pada polimer imprinted ionik (PII)dari hibrida amino-silika (HAS) yang disintesis menggunakan senyawa 3-aminopropiltrimetoksisilan (3-APTMS) dengan tetraetil ortosilkat (TEOS)sebagai prekursor telah dipelajari. Kontribusi pengikatan ion Cd(II) dan Cu(II)pada sintesis material HAS imprinted ionik Cd(II) dan Cu(II) didominasi olehinteraksi kimia melalui interaksi elekstrotatik sebesar 43,06 ± 0,42 % untukCd-HAS dan 40,96 ± 0,21% untuk Cu-HAS, sedangkan pembentukan ikatankovalen sebesar 50,91 ± 0,25 % untuk Cd-HAS dan 54,87 ± 0,20 % untuk Cu-HAS.Kata kunci : Imprinted ionik, hibrida amino-silika, 3-aminopropiltrimetoksisilan
PROSES SOL-GEL DALAM PEMBUATAN HIBRIDA MERKAPTO-SILIKA UNTUK ADSORPSI ION CU (II) DALAM LARUTAN Buhani, Buhani; Narsito, Narsito; Nuryono, Nuryono; Kunarti, Eko Sri
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 19, No 3 (2012)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

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THE ROLE OF C-METHYL-4,10,16,22-TETRAMETOXY CALIX[4]ARENE AS INHIBITOR OF CALCIUM CARBONATE (CaCO3) SCALE FORMATION Suharso, Suharso; Buhani, Buhani; Suhartati, Tati
Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

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Abstract

The role of C-methyl-4,10,16,22-tetrametoxy calix[4]arene as inhibitor of calcium carbonate scale formation has been investigated. The result shows that C-methyl-4,10,16,22-tetrametoxy calix[4]arene inhibits a formation of calcium carbobate crystals at a concentration of growth solution of 0.1 M. The ability of C-methyl-4,10,16,22-tetrametoxy calix[4]arene as inhibitor of the formation of calcium carbobate scale is 33-100% in inhibiting growth rate of CaCO3 scale formation. This ability depends on the concentration of C-methyl-4,10,16,22-tetrametoxy calix[4]arene added into growth solution. However, the addition of C-methyl-4,10,16,22-tetrametoxy calix[4]arene at a range of 10-100 ppm is a much enough in inhibiting the growth rate of CaCO3 crystals.   Keywords: tetrametoxycalixarene, CaCO3, inhibitor
AMINO AND MERCAPTO-SILICA HYBRID FOR Cd(II) ADSORPTION IN AQUEOUS SOLUTION Buhani, Buhani; Narsito, Narsito; Nuryono, Nuryono; Kunarti, Eko Sri
Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

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Abstract

Modification of silica gel with 3-aminopropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane through sol-gel technique producing amino-silica hybrid (HAS) and mercapto-silica hybrid (HMS), respectively, has been carried out using tetraethylorthosilicate (TEOS) as silica source. The adsorbents were characterized using infrared spectroscopy (IR), and X-ray energy dispersion spectroscopy (EDX). Adsorption of Cd(II) individually as well as its binary mixture with Ni(II), Cu(II), and Zn(II) in solution was performed in a batch system. Adsorption capacities of Cd(II) ion on adsorbent of silica gel (SG), HAS, and HMS are 86.7, 256.4 and 319.5 μmol/g with the adsorption energies are 24.60, 22.61 and 23.15 kJ/mol, respectively. Selectivity coefficient (α) of Cd(II) ion toward combination of Cd(II)/Ni(II), Cd(II)/Cu(II), and Cd(II)/Zn(II) ions on HAS adsorbent is relatively smaller than those on HMS adsorbent which has α > 1.   Keywords: adsorption, amino-silica hybrid, mercapto-silica
BIOSORPTION OF METAL IONS Pb(II), Cu(II), AND Cd(II) ON Sargassum duplicatum IMMOBILIZED SILICA GEL MATRIX Buhani, Buhani; Suharso, Suharso; Sembiring, Zipora
Indonesian Journal of Chemistry Vol 6, No 3 (2006)
Publisher : Universitas Gadjah Mada

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Abstract

Sargassum duplicatum algae biomass is biological material which has a potency to be used as a biosorbent adsorb metal ions from industrial liquid waste, because it has effective functional group as a ligand. However, the ability of the algae biomass in adsorbing of heavy metal ions has some problem such as; tiny size, low density, and easy to be degradated by other microorganism. In addition, algae biomass can not be used directly in adsorption column for its application as the biosorbent. In order to improve physical and chemical prpperties of algae biomass, it needs to be immobilized on silica gel matrix. Series of experiment have been done, morphology analysis of adsorbent surface was performed by using Scanning Electron Microscopy (SEM) and adsorption process to examine the effectiveness of algae biomass immobilized in adsorbing Pb(II), Cu(II), and Cd(II) was performed using batch method at 27 °C. Concentration of metal was determined by using Atomic Absorption Spectrophotometer (AAS) and identification of functional group was conducted using Spectrophotometer Infrared (IR). Data obtained showed that interacting among metal ions with algae biomass is optimum at a range of 60 minutes. Adsorption energies of metal ions resulted from the interaction of metal ions with the functional group of -C=O group from carboxyl and amide on algae biomass and -Si-OH group from silica were at a range of 21.09-25.05 kJ/mole.   Keywords: biosorption, silica gel, Sargassum duplicatum, immobilization
CHEMICAL STABILITY AND ADSORPTION SELECTIVITY ON Cd2+ IONIC IMPRINTED Nannochloropsis sp MATERIAL WITH SILICA MATRIX FROM TETRAETHYL ORTHOSILICATE Buhani, Buhani; Suharso, Suharso; Aprilia, Liza
Indonesian Journal of Chemistry Vol 12, No 1 (2012)
Publisher : Universitas Gadjah Mada

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Abstract

Chemical stability, reusability, and adsorption selectivity of Cd2+ ionic imprinted Nannochloropsis sp with silica matrix (Cd(II)-IIP) from precursor tetraethyl orthosilicate (TEOS) have been studied through adsorption experiment series with batch method. Nannochloropsis sp (Cd(II)-IIP) material was characterized with an infrared spectrophotometer (IR) to identify the functional groups in this material and identification of metal ion concentration was analyzed with an atomic absorption spectrophotometer (AAS). Chemical stability was determined in solution media of acid, neutral, and base. Adsorption selectivity was obtained with determination of selectivity coefficient (α) of Cd2+ ion toward its ionic pair such as Ag+, Zn2+, Cu2+, and Ni2+ ions. Nannochloropsis sp Cd(II)-IIP material is very stable in acid media and lack stable in base media as well as it can be reused for extraction 4 cycles with adsorption capacity value > 95% using eluent of 0.1 M Na2EDTA. Selectivity of Cd(II)-IIP material upon Cd2+ ion is higher than non imprinted polymer (NIP) and it increases with these orders; Cd2+/Ag+ < Cd2+/Zn2+ < Cd2+/Cu2+ < Cd2+/Ni2+ for each α at metal ionic ratio of 1:1; 0.887; 20.180; 28.053; 33.417, respectively.
Adsorption Competition between H+ and Cd2+ Ions Toward Active Sites on Ionic Imprinted Mercapto-Silica Hybrid Buhani, Buhani
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Abstract

Adsorption process on Cd2+ionic  imprinted mercapto-silica hybrid material  (Cd(II)-IIP HMS) has been carried out with studying an adsorption competition between ion H+ and Cd2+ ion upon active sites of Cd(II)-IIP HMS material.  Characterization of surface material was based on specific surface area, total volume, and porous diameter.  Cd(II)-IIP HMS material with template ionic concentration of each 0.107; 0.214; 0.429; 0.658 mmol g-1 shows  that adsorption model  is relatively similar, the higher of H+ ion competed,  the  lower of adsorption capacity of Cd(II)-IIP HMS material upon Cd2+ ion.  Keywords: adsorption, active site, mercapto-silica hybrid, ionic imprinted
Chemical Stability of Cd(II) and Cu(II) Ionic Imprinted Amino-Silica Hybrid Material in Solution Media Buhani, Buhani
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 13, ISSUE 1, February 2012
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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Chemical stability of Cd(II) and Cu(II) ionic imprinted amino-silica (HAS) material of (i-Cd-HAS and i-Cu-HAS) derived from silica modification with active compound (3-aminopropyl)-trimethoxysilane (3-APTMS) has been studied in solution media.  Stability test was performed with HNO3 0.1 M (pH 1.35) to investigate material stability at low pH condition, acetat buffer at pH 5.22 for adsorption process optimum pH condition, and in the water (pH 9.34) for base condition.  Material characteristics were carried out with infrared spectrophotometer (IR) and atomic absorption spectrophotometer (AAS).  At interaction time of 4 days in acid and neutral condition, i-Cd-HAS is more stable than i-Cu-HAS with % Si left in material 95.89 % (acid media), 43.82 % (close to neutral), and 9.39 % (base media).Keywords: chemical stability, amino-silica hybrid, ionic imprinting technique.
Pembuatan Kompos Dari Limbah Pertanian Sebagai Solusi Pengadaan Pupuk Secara Mandiri Oleh Masyarakat Di Desa Way Tuba Dan Campur Asri Kabupaten Way Kanan Buhani, Buhani; Suharso, Suharso; Noviadi, Riko
Jurnal Pengabdi Vol 1, No 2 (2018): Oktober 2018
Publisher : Universitas Tanjungpura

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Waste management based on community participation that aims to implement the 4Rp concept (Reduce, Reuse, Recycle, Replace, Participation) has been implemented through the Regional Partnership Program (PKW) of Ministry of Research, Technology and Higher Education, by the PKW Team from the University of Lampung, in collaboration with Polinela and Government of Way Kanan District through the Environmental Services. This program was performed to manage the agricultural waste independently by the communities to reduce the amount of midden that must be managed at the landfill and it can provide an economic added value. These activities have been carried out in two villages, namely Way Tuba Village – Sub-district of Gunung Labuhan and Campur Asri Village, Sub-district of Baradatu, which have potency of the agricultural waste in Way Kanan District. In general, the results of these activities have increased community participation and knowledge of the paradigm of waste and waste management with the concept of the 4 Rp, procurement of fertilizers/compost independently, as well as being a pioneer of waste management based on active participation from the community. In addition, this program has provided solutions to the community to produce fertilizers/compost independently, either to be used for their own needs or sold to meet fertilizer/compost needs in the surrounding environment.
Removal of Methylene Blue by Adsorption onto Activated Carbon From Coconut Shell (Cocous Nucifera L.) Khuluk, Rifki Husnul; Rahmat, Ali; Buhani, Buhani; Suharso, Suharso
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

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This research has been conducted on process of production activated carbon from coconut shells, which are activated both physics and chemistry to improve the adsorption of methylene blue. The process of physical activation was done by burning the coconut shell using a furnace at a temperature of 700°C. The chemical activation was done using H3PO4 activator. The result of activated carbon physical activation (CAP) has a greater absorbency than activated carbon chemical activation (CAC) with each of the absorption of methylene blue at 99.42 and 98.64%. Analysis of surface morphology on the adsorbent was performed using a Scanning Electron Microscope (SEM). SEM results indicated that (CAP) has a surface morphology that is relatively similar to commercial activated carbon (CACm). Adsorption test was conducted on the determination of the optimum pH, adsorption rate, and isotherm adsorption of methylene blue. The results of the optimum pH on CAC, CAP, and CACm respectively obtained at pH 8 and the optimum contact time is obtained respectively at 40, 60, and 80 minutes. Adsorption kinetics data of methylene blue on CACm, CAP, and CAC tend to follow the pseudo second order kinetics with a correlation coefficient (R2) is 0.937; 0.950; and 0.999, respectively. Adsorption isotherm of methylene blue on CACm, CAP, and CAC tend to follow the model of Freundlich isotherms.