Fabrication of methacrylate polymer-based on the silica capillary modified with dimethylamine

Silica is a useful material in adsorption, electronics, mechanical, medical, art to other fields. In this study, Sodium silicate is used which can be used as a more economical precursor of silica as which is produced from natural silica. Silica was synthesized using the sol-gel method. This study aims to determine the effect of adding CTAB mass and aging time in synthesizing silica. The synthesized silica was tested for iodine absorption value and characterized using FTIR. Based on the iodine absorption of variations in adding mass CTAB (0,1, 0,15, 0,2, 0,25, and 0,3 gram) and aging time (8, 12, 16, 20 and 24 hours) give the most absorption to optimum conditions of adding mass CTAB at 0,2 gram and aging time at 16 hours. The results of measurements with FTIR showed the presence of absorption bands which indicated the loss of CTAB in the synthesized silica.

Section: B Optimasi Waktu Agingunclassified

Pengaruh Penambahan Cetyltrimethylammonium Bromide (CTAB) pada Silika dari Natrium Silikat (Na2SiO3)

Dafnaz,

Oktavia,

Hardeli

et al. 2022

“…Pada tahun 2013, Wang et all dalam jurnal "adsoption and desorption characteristic of imidazole-modified silica for chromium(VI)" berhasil menyerap ion kromium dengan menggunakan silica yang telah dimodifikasi dengan senyawa imidazol [3]. Pada tahun 2020, Oktavia dan Kardi berhasil melakukan pembuatan kolom monolit dengan bahan silica menggunakan dimetilamin (DMA) sebagai pemodifikasi dan ethylene dimethacrylate sebagai crosslinker dan penggunaanya pada ion kromatografi [4].…”

Section: Pendahuluanunclassified

Penentuan Kondisi Optimum Penyerapan Anion Kromat Pada Silika Termodifikasi Dimetilamina

Chaniasi,

Oktavia,

Dewata

et al. 2022

Heavy metal is the most dangerous was for the ecosystem because is not biodegradable, toxic, and carcinogenic even in a low concentration (ppm). It usually experienced some conditions such as not dissolved, precipitated, fused, absorbed, anorganic, reducer, oxidize, and free metal. One of the heavy metals that can cause negative effects for human and other living creature is Kromium Ion. The waste of the usage of Krom can damage the environment. Krom is a heavy metal that has dangerous affects that we have to be aware of. Krom (VI) on water was found 2 form od specieses, as an anion (Cr2O7)2- (In Acid solution) and anion (CrO4)2- (In Alkaline solution). One of the ways how to overcome Krom in a waste is by absorb it with an adsorbent, modified Silica DMA. It characterized with an electron microscope scanning, infrared spectrum, K2CrO4 adsorption from liquid solution which investigated in some pH level, contact time, K2CrO4 first concentration. The result of the experiment shows that modifying silica with DMA increases the adsorption capacity for Kromat. Langmuir Isotherm Adsorption resulting regression coefficient on Silica R2=0,8488, and for the modified Silica R2=0,9054. Kromat maximum adsorption capacity on 1,255 mg/g Silica and 2,26 mg/g modified Silica with first concentration of K2CrO4 100 mg/L can be reach on pH 2 with 90 minutes mixing process.

“…Fasa diam ini diaplikasikan pada kolom kromatografi ion. [12]. Keunggulan dari kromatografi ion adalah memiliki metode pemisahan yang sederhana serta andal untuk membedakan dan mengidentifikasi ion organik maupun anorganik dalam larutan [13].…”

unclassified

Pengaruh pH dan Waktu Kontak Terhadap Adsorpsi Ion Pb2+ pada Silika Gel-GPTMS Termodifikasi Sulfonat

Afrilia,

Oktavia,

Kurniawati

et al. 2024

Adsorption is the process of accumulation of atoms or ions in solution on the surface of a solid adsorbent. Silica gel can be used as an adsorbent because it has two groups of active sites, namely silanol (Si-OH) and siloxane (Si-O-Si). The active groups also allow silica to be modified. This modification was made to increase the ability of silica to adsorb ions, one of which is Pb 2+ ion. The modifier compound used is a sulfonic salt (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) with a glysidoxypropyltrimethoxysilane (GPTMS) linking compound. The modified adsorbents were characterized by FTIR and the absorption results were characterized by AAS. The modified adsorbent was to determine the optimum conditions for adsorption of Pb 2+ ions using silica sulfonate. Adsorption was carried out using the batch method. The optimum absorption conditions for Pb 2+ metal ions using silica sulfonate were obtained at pH 3, contact time of 45 minutes.