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Inayati Inayati
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Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Materials Science & Nanotechnology

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Carboxymethylation of Cassava Peel: Effect Sodium Monochloroacetate and Temperature Sperisa Distantina; Inayati Inayati; Fahmi Achmad Saputra; Muhammad Fitra Arifianto
Equilibrium Journal of Chemical Engineering Vol 2, No 1 (2018): Volume 2 No 1 January 2018
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v2i1.40425

Abstract

Cassava peel contains cellulose that can be chemically modified to be more useful product. In this work, carboxymethylcellulose (CMC) from cassava peel powder was prepared by alkalization using sodium hydroxyde and then followed by carboxymethylation using sodium monochloroacetate. The aims of this work were to investigate the effect of sodium monochloroacetate-powder ratio (0.59, 1.47, 2.95, 4.42) and carboxymethylation temperature (45OC and 70OC) on the degree of substitution (DS) and reaction efficiency (RE).  The  result  of  FTIR  spectra indicated that  carboxylmethyl groups successfully attached on the cellulose backbone to  form CMC structure. The higher of sodium monochloroacetate-powder ratio and higher carboxymethylation temperature enhanced its DS but reduced the RE.
Synthesis of Carboxymethyl Cellulose (CMC) from Banana Tree Stem: Influence of Ratio of Cellulose with Sodium Chloroacetate To Properties of Carboxymethyl Cellulose Hendrik Aditya Mulyatno; Odisaputra Ihsan Pratama; Inayati Inayati
Equilibrium Journal of Chemical Engineering Vol 1, No 2 (2017): Volume 1 No 2 July 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i2.40419

Abstract

Banana tree stem contain of 63-64% cellulose that can be processed into more valuable product. In this research, carboxymethylcellulose (CMC) from banana tree stem was  prepared  through  alkalization  and  carboxymethylation process.  The  aim  of  this research was to investigate the effect of cellulose to sodium chloroacetate 1:1 and 1:2 to the properties of CMC. Samples were analyzed their NaCl content, purity of CMC, and degree of substitution. The result showed that sample with ratio 1: 2 between cellulose with sodium chloroacetate resulted greater NaCl content, lower purity of CMC, and greater degree of substitution.
Penentuan Kondisi Optimum Adsorpsi Kromium (III) Menggunakan Biosorben dari Limbah Kulit Nangka (Artocapus heterophyllus) Karina Ardiani; Arifah Nur Raya; Inayati Inayati
Equilibrium Journal of Chemical Engineering Vol 1, No 1 (2017): Volume 1 No 1 January 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i1.40067

Abstract

The purposes of the research are determine the optimum condition and themaximum adsorpstion of Cr (III) by biosorben from jackfruit peel. The process of theadsorption was started by to put 0.03 grams jackfruit peel adsorben to Cr(NO3)3 solution2.5 ppm. The variables of the research are activation time, contact time between theadsorben and the solution, and pH of the solution. The sample was analyzed byAbsorption Spectrophotometre (AAS) to show the Cr (III) concentration on the solutions.The optimum condition was reached at 5 pH level with 50 minute of contact times and 24hours activation time. The analysis results that the adsorption follows Langmuir Isotermshowed by the determinant value (R2). The maximum power adsorption is 1.227 mg/gramadsorben
Chromium Metal Biosorption Using Peanut Shell Adsorbent Siti Annida; Inayati Inayati; Fera Setiawati
Equilibrium Journal of Chemical Engineering Vol 2, No 1 (2018): Volume 2 No 1 January 2018
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v2i1.40428

Abstract

One of the negative effects of the industrial growth is the presence of hazardous waste such as heavy metals. Chromium (VI) is a heavy metal which acts as the pollutant for  the  environment. Chromium concentration in  water  can  be  reduced using some methods. Adsorption is the most favorite method. Some of the biomass can be processed into adsorbent. This work was aimed to produce biosorbent from peanuts shell. The adsorbent was then used to adsorb chromium contented in water. Sodium hydroxide solution 0.5 M was used to activate peanut shell. Produced biosorbent was characterized using Fourier Transform Infrared Spectroscopy. The results showed that optimum condition for chromium adsorption was achieved at 30 minutes contact time with maximum adsorbed chromium of 0.022 mg/g adsorbent. The adsorption mechanism was in a good agreement with Langmuir isotherm.
Co-Authors Arifah Nur Raya Fahmi Achmad Saputra Fera Setiawati Hendrik Aditya Mulyatno Karina Ardiani Muhammad Fitra Arifianto Odisaputra Ihsan Pratama Siti Annida Sperisa Distantina