Eva Oktavia Ningrum, Eva Oktavia
Program Studi Teknik Kimia, FTI, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Sukolilo,Surabaya 60111

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Pengaruh Perubahan Suhu pada Properti Adsorpsi dan Desorpsi Thermosensitive NIPAM-co¬-DMAAPS Gel

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Adsorbent gels with ability to absorb and desorb ion simultaneously with temperature swing are synthesized by free radical copolymerization reaction of N-isopropylacrylamide (NIPAM) and N,N-dimethyl(acrylamidopropyl)ammonium propane sulfonate (DMAAPS). In this study, NIPAM acts as a thermosensitive agent and DMAAPS as an adsorbent agent. The purposes of this research are to investigate the effects of temperature on the swelling, adsorption and desorption behaviors of ion onto thermosensitive NIPAM-co-DMAAPS gel, and to study the relationship between these behaviors. NaNO3 solution was selected as the target solution and used in swelling, adsorption and desorption test. Swelling test was done by measuring diameter of the cylindrical gel after and before immersion in the NaNO3 solution for 12 hours. The result revealed that at high temperature, the amount of ion adsorbed onto the gels was low. On the contrary, the gel exhibited a high degree of swelling and high amount of ion desorbed from the gel. Moreover, higher concentration of NaNO3 solution resulting in the higher value of the swelling degree, adsorption and desorption ability. Based on the relationship between the swelling properties and adsorption properties, it can be concluded that at a lower degree of swelling, the amount of ion adsorbed onto the gels showed a constant value. However, the amount of ion adsorbed decrease with further increasing the swelling degree.

KONSENTRASI CROSS-LINKER TERHADAP PERFORMA ADSORBEN BERBASIS THERMOSENSITIVE NIPAM-CO-DMAAPS GEL

Teknik Kimia Vol 12, No 1 (2017): JURNAL TEKNIK KIMIA
Publisher : jurusan teknik kimia

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Abstract

Penyebab pencemaran logam berat di perairan Indonesia, seperti yang terjadi di teluk Jakarta adalah kegiatan industri yang menghasilkan limbah logam berat. Akumulasi logam berat dalam air dan tanah dapat membahayakan kelestarian ekosistem. Salah satu teknologi terbaru dalam separasi ion logam berat adalah metode adsorpsi dengan zwitterionic betaine. Adsorben berbasis thermosensitive polimer gel khususnya zwitterionic betaine memiliki kelebihan yaitu mampu menunjukkan selektivitas ion. Ion tersebut dapat diikat melalui charged group yang terletak di perulangan unit yang sama. Kation akan diikat oleh charged group bermuatan negatif (SO3-) dan anion akan diikat oleh charged group bermuatan positif (N+) adsorben secara simultan. Pada penelitian ini gel hasil kopolimerisasi antara N-isopropylacrylamide (NIPAM) dan N,N’-dimethyl(acrylamidopropyl)ammonium propane sulfonate (DMAAPS) akan digunakan sebagai adsorben. Pada penelitian ini thermosensitive NIPAM-co-DMAAPS gel dipersiapkan melalui reaksi polimerisasi radikal bebas dengan menggunakan N,N,N’,N’-tetramethylethylenediamine (TEMED) sebagai akselerator, ammonium peroxodisulfate (APS) sebagai inisiator, dan N,N’-methylenebisacry-lamide (MBAA) sebagai cross-linker dengan  konsentrasi 10 mmol/L dan 30 mmol/L. Untuk mengetahui keberhasilan sintesa gel dilakukan uji FTIR. Larutan Zn(NO3)2 digunakan untuk menguji performa dari gel antara lain adsorpsi terhadap ion logam berat serta hubungannya dengan swelling degree. Selain itu semakin tinggi jumlah ion yang teradsorp akan mengakibatkan naiknya nilai swelling degree.

Sintesis Kopolimer Gel Berbasis NIPAM (N-isopropylacrylamide), Kitosan dan Asam Akrilat Sebagai Adsorben Limbah Elektroplating

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Indonesia is one of the worst countries in Asia in terms of wastewater treatment which results in environmental pollution. One of the factors is the electroplating industry that produces heavy metal waste. One of the heavy metal wastes from electroplating is chromium metal that become a threat to humans and the environment because it can cause acute poisoning, accumulated in the human body and damage the ecosystem. One of the methods used to regenerate heavy metal waste is by employing zwitterionic betaine gel. However, this method has its disadvantages with the presence of intra-intrachain associations that inhibit the ionic group's ability to adsorb ions by the charge group interaction.This study aimed to improve the gel adsorption ability by reducing the association of intra-intrachain copolymers through separately synthesis the anionic gel (NIPAM-co-acrylic acid) and cationic gel (NIPAM-co-chitosan). NIPAM-co-chitosan and NIPAM-co-acrylic acid gels were synthesized through polymerization reactions using N,N,N',N'-tetramethylethylenediamine (TEMED) as accelerators and N,N'-methylenebisacrylamide (MBAA) as a crosslinker. Innitially TEMED, MBAA, NIPAM and chitosan or acrylic acid were mixed in distillated water with a total volume of 100 ml. The solution was stirred for 10 minutes, purged with N2 gas with a flowrate of 500 ml/min in four neck flask at 10 oC. Ammonium peroxodisulfate (APS) was then added into solution. The polymerization reaction occurred for 6 hours. In this study the adsorption/desorption of metal ions by pH-thermosensitive gel are investigated in various pH, and weight balance between NIPAM-co-anionic and NIPAM-co-cationic gel. The effects of the temperature and the conditions employed in the preparation of the gel, i.e., monomer concentration on the extent of adsorption of metal ions on the gel were also elucidated. The adsorption and desorption behavior of the gel is discussed by considering the swelling degree of the gel as well as the transition temperature of poly(NIPAM-co-chitosan) and poly(NIPAM-co-acrylic acid). Based on the results of FTIR analysis, the vinyl groups peak of the copolymer gel decreased compared with that of its constituent monomers. It can be concluded that the synthesis of copolymers was successful. While based on the swelling degree test using an electroploting waste solution, the higher the temperature of the solution, the lower the swelling degree of the gel. Moreover, gel porous occurred because of the higher synthesis temperature.

Pengaruh Jenis Ion Logam Berat Terhadap Daya Adsorpsi dan Desorpsi Thermosensitive NIPAM-co-DMAAPS Gel

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The development of industrial field causes increasing amount of heavy metal ions in the environment. A promising method to deal with the problem above is by utilizing reversible thermosensitive gel as an adsorbent to adsorb heavy metal ions in the environment. The purpose of this research is to develop a reversible thermosensitive gel that able to adsorb heavy metal ions from contaminated water. Copolymergel containing zwitterionic betaine N,N’-dimethyl(acrylamidopropyl) ammonium propane sulfonate (DMAAPS) and thermosensitive N-isopropylacrylamide (NIPAM) copolymer was employed as an adsorbent that able to adsorb and regenerate heavy metal ion in salt solutions. The effect of different ion in various salt solutions and temperature on the adsorption, desorption, and swelling degree of the gel were investigated in this research. The solution used in this experiment are Zn(NO3)2 and Pb(NO3)2 solutions. The gels were synthesized using free radical copolymerization. The synthesized gel showed higher adsorption and desorption ability in Pb(NO3)2 solution than that in Zn(NO3)2 solution. However, gel has a higher value of swelling degree in Zn(NO3)2 solution than that in Pb(NO3)2 solution. Other noticeable result is that swelling degree, desorption, and adsorption ability of the gels decreases in all solution as temperature rises.

Sintesa dan Karakterisasi Biokomposit Poly(L-Lactid Acid)/Cellulose Acetate dan Aplikasinya sebagai Adsorben Bead

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Biocomposite materials comprised of poly(L-lactic acid) (PLLA) and cellulose acetate (CA) were preparedthrough solvent blending technique. The obtained biocomposite films were characterized by using dynamicmechanical analysis (DMA) and thermogravimetric analysis (TGA). The biocomposites were then applied asadsorbent bead for dye separation. The properties and adsorption performance of the biocomposite beadswere also observed in term of morphology, surface area and adsorption capacity. The composition ofPLLA/CA in weight ratio was varied: 100/0; 75/25; 50/50; 25/75; 0/100. The dye used in this research foradsorption analysis was methylene blue (MB). The MB adsorption was done in two pH conditions which areneutral and base (pH=10) conditions. The mechanical properties of biocomposites PLLA/CA films showedthe slightly decrease in tensile strength after the addition of CA until 50 wt% and then increased again forhigher CA content. However, the young modulus continuously increased with CA content. The elongation atbreak of biocomposite PLLA/CA films showed higher value of elongation at break compared to the pristinePLLA and CA. On the other hand, the thermal stability of biocomposites increased with the increasing of CAcontent compared to that of pristine PLLA. The increase in thermal stability was caused by the specificproperty of CA which is high thermal resistant. For its application, the beads could only be obtained fromthe biocomposite with higher CA composition, PLLA/CA (25/75) and (0/100). The morphology of PLLA/CAbeads showed spherical shape with porous structure on their surface. Adsorption performance measurementshowed that the adsorption capacity and % removal of the PLLA/CA (25/75) bead increase compared to thepure CA bead.

Adsorption and Desorption of Na+ and NO3− Ions on Thermosensitive NIPAM-co-DMAAPS Gel in Aqueous Solution

Indonesian Journal of Chemistry Vol 17, No 3 (2017)
Publisher : Universitas Gadjah Mada

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Abstract

Adsorbent gel with the ability to absorb and to desorb Na+ and NO3− ions simultaneously with temperature swing was synthesized by free radical copolymerization reaction of N-isopropylacrylamide (NIPAM) and N,N-dimethyl-(acrylamidopropyl)ammonium propane sulfonate (DMAAPS). In this study, NIPAM acts as a thermosensitive agent and DMAAPS as an adsorbent agent. The purpose of this research is to investigate the effect of temperature and solution concentration on the swelling, adsorption, and desorption behaviors of NIPAM-co-DMAAPS gel. The relationship between adsorption and desorption behaviors of the gel was also elucidated. NaNO3 solution was selected as the target solution in swelling, adsorption, and desorption test. It was observed that the swelling degree of the gel increased as temperature and solution concentration raised. The adsorption amount of ions decreased with the increase of temperature. In contrast, the amount of ions desorbed from the gel increased linearly with temperature.

Modifikasi Biokomposit Kitosan dari Cangkang Rajungan (Portunus Pelagicus) dan Pektin untuk Aplikasi Edible Film

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

According to the 2016 data from the Ministry of Environment and Forestry, Indonesia is the second largest plastic waste disposal country after China. The use of synthetic plastic today contains negative effects on the environment and health due to its non-biodegradable nature. It is necessary to develop renewable plastics that are safe for the environment and health to reduce the negative impact of these problems. Edible film is a good alternative to synthetic plastic because it is biodegradable and safe for health. Edible film modification by blending chitosan and pectin biopolymers is a potential way to produce denser biocomposite of edible film. This study aimed to utilize the chitosan of crab shell waste and pectin as edible film biocomposite because those wastes have not been widely utilized. The synthesis edible film and the effect of the ratio of chitosan and pectin mixture to physical properties, mechanical properties, and the biodegradability of edible film were also studied by using various ratios of chitosan and pectin (C: P), i.e., 100:0, 50:50, 0 100). In the blending process, glycerol was added as a plasticizer with a concentration of 20% of the weight of the biopolymer. Edible films produced were analyzed to investigate the physical properties, and mechanical properties. The results show that the best characteristics of edible film produced from a mixture of chitosan and pectin with a thickness of 0.068 mm and 44.11% of air solubility. Thickness and water solubility of edible films can be improved by mixing chitosan biopolymer and pectin. However, the edible film solubility in water was not too high because of the hydrophobic nature of the chitosan.

Sintesis Poly (Sodium Acrylate-co¬-Acrylamide) sebagai Flokulan Anionik pada Proses Pemurnian Nira

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The problems in Indonesia related to the sugar industry is that sugar consumption is greater than its production which causes the inability of the sugar industry to meet the demands of all consumers. One of the problems that occur is due to the large number of imported raw materials including flocculants, which in this case is anionic polyacrylamide flocculants. Anionic polyacrylamide (APAM) was first developed in the world through an alkali hydrolysis process. So far, APAM synthesis technology has undergone a lot of development. In this study, synthesis poly (sodium acrylate-co-acrylamide) was performed as flocculant which will be used in the sugar refining process. The synthesis steps between acrylic acid and sodium carbonate. And then synthesis with acrylamide and add some of ammonium persulfate. This study was conducted in various concentrations of acrylic acid and acrylamide, i.e., 0: 100, 20:80, 40:60, 50:50, 60:40, 80:20, 100: 0. The resulting flocculants was tested in sugar canein in order to determine the effect of the flocculantsaddition. The result of FTIR test showed that the polymerization process between acrylic acid and acrylamide has been succeeded. After analysis, the most effective flocculants obtained at concentration acrylade: acrylamide of 50:50.

Pengaruh Properti Kopolimer Zwitterionic Sulfobetaine terhadap Kemampuan Adsorpsi-Desorpsi Gel pada Ion Logam Berat

Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Prosiding Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

In 2016, it was stated that 92.1% of the quality of river water in Indonesia was polluted by a heavy metal ion. Such heavily polluted water is not feasible to use, let alone consumed. In this study, NIPAM-co-DMAAPS gel which consists of monomer N-isopropylacrylamide (NIPAM) and N,N’-dimethyl(acrylamidopropyl) ammonium propane sulfonate (DMAAPS) was synthesized to be applied as an adsorbent to overcome the environmental pollution. DMAAPS is thermosensitive and zwitterionic. This zwitterionic has two charges, positive and negative, in the same repeating unit, which can be used to adsorb cations and anions simultaneously. While NIPAM is thermosensitive, it is used as a spacer to avoid inter-chain, intra-chain, and intra-group bonding between charged groups on DMAAPS zwitterion homopolymers. It is also used as an adsorption agent because the ability to change from hydrophilic to hydrophobic with temperature change. In this research, poly(NIPAM-co-DMAAPS) properties such as functional groups, hydrophobic or hydrophilic properties, viscosity, transition temperature and correlation with its gel adsorption ability were evaluated in various concentrations of NIPAM:DMAAPS of 95:5, 90:10, and 85:15 in Cr(NO3)3 solutions as the source of Cr3+ ion which are dominantly found in electroplating waste. Poly(NIPAM-co-DMAAPS) was synthesized through free radical polymerization reactions with N,N,N’,N’-tetramethylenediamine (TEMED) as an accelerator, ammonium peroxodisulfate (APS) as the initiator. Whereas for gel synthesis, cross-linker of N,N’-methyl-enebisacrylamide (MBAA) was added. The polymerization reaction lasts for 6 hours at 10 oC by keep flowing the nitrogen gas during the reaction. The IR spectra showed that the polymerization process was carried out successfully, and the highest adsorption of heavy metal ions occurred in the copolymer gel with the ratio NIPAM:DMAAPS of 85:15.