Penggunaan Tanah Vertisol Sebagai Bahan Baku Pembuatan Silika

Medya Ayunda Fitri; Farikha Alfi Syahriyah; Yulia Tri Rahkadima

doi:10.33795/jtkl.v5i1.212

Penggunaan Tanah Vertisol Sebagai Bahan Baku Pembuatan Silika

Jurnal Teknik Kimia dan Lingkungan ◽

10.33795/jtkl.v5i1.212 ◽

2021 ◽

Vol 5 (1) ◽

pp. 50

Author(s):

Medya Ayunda Fitri ◽

Farikha Alfi Syahriyah ◽

Yulia Tri Rahkadima

Keyword(s):

Extraction Method ◽

Room Temperature ◽

Mesh Size ◽

Silica Content ◽

Alkaline Extraction ◽

Second Stage ◽

Whatman Paper

Penggunaan silika sering digunakan dalam berbagai industri. Tujuan penelitian ini adalah untuk mengetahui kadar silika pada tanah vertisol di desa Bringinbendo. Penelitian ini dimulai dengan perendaman tanah pada aquadest, kemudian dicuci sebanyak 3 kali dan dikeringkan pada 110°C selama 24 jam. Selanjutnya dihaluskan hingga ukuran 250 mesh. Tahapan kedua yaitu sintesis silika dengan metode ekstraksi alkali dan diikuti presipitasi asam. 20 gram serbuk tanah diekstraksi dalam 100 ml NaOH (3, 5, dan 7M) sambil diaduk dan dipanaskan pada 80°C. Selanjutnya ditambahkan aquadest sebanyak 250 ml dan disaring menggunakan kertas Whatman. Filtrat dititrasi dengan HCl 5M sambil diaduk hingga pH mencapai 7. Suspensi dipertahankan pada temperatur kamar selama 24 jam, disaring, dan dicuci sebanyak 5 kali dengan aquadest kemudian dikeringkan. Hasil dari penelitian yaitu massa silika paling besar terdapat pada konsentrasi NaOH 7M pada waktu 1 jam yaitu 2,59 gram dan tanah vertisol di Desa Bringinbendo memiliki kadar silika dalam kategori sedang dengan persentase sebesar 77,7%.Silica is widely used in industry. The aim of this study was to determine the silica content in vertisol soil in Bringinbendo village. This research was started by soaking the soil in aquadest, then washed 3 times and dried it at 110 ° C for 24 hours. Furthermore, smoothed to 250 mesh size. The second stage is the synthesis of silica using the alkaline extraction method and the treatment of acids. 20 grams of soil powder were extracted in 100 ml NaOH (3, 5, dan 7M) while stirring and heated at 80 ° C. Next, 250 ml of aquadest was added and filtered using Whatman paper. The filtrate was titrated with 5M HCl while stirring until the pH reached 7. The suspension was maintained at room temperature for 24 hours, filtered, and 5 times with aquadest then dried. The results of the mass study were that the greatest silica was found in 7M NaOH concentration at 1 hour, namely 2.59 grams and vertisol soil in Bringinbendo Village had silica content in the medium category with a proportion of 77.7%.

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Preparation and Characterization of Silica Gel from Bagasse Ash

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1145.44 ◽

2018 ◽

Vol 1145 ◽

pp. 44-48 ◽

Cited By ~ 2

Author(s):

Chanchira Channoy ◽

Somchai Maneewan ◽

Chantana Punlek ◽

Surapong Chirarattananon

Keyword(s):

Sodium Hydroxide ◽

Sugarcane Bagasse ◽

Extraction Method ◽

Agricultural Waste ◽

Silica Content ◽

Alkaline Extraction ◽

X Ray Diffraction ◽

X Ray ◽

Sugarcane Bagasse Ash

Sugarcane bagasse is an agricultural waste that is potentially used as natural silica resources. Natural silica claimed to be safe in handing, cheap and can be generate from cheap resource. In the objectives of this study were to prepared silica from Sugarcane bagasse. The preparation of Sugarcane bagasse ash by burning at 700 °C for 4 and 6 h, respectively in atmosphere. The result of X-ray florescent: XRF, silica content which was obtained after heat treatment at 700 °C for 6 h was 80.814 wt%. Bagasse ash was purified by alkaline extraction method with 1.5, 2 and 2.5 N sodium hydroxide (NaOH), respectively. And refluxed by using concentrated 2 N sulfuric acid. From X-ray diffraction pattern showed that the obtained products were amorphous silica, 2.5 N sodium hydroxide. The morphology was observed by SEM, sphere and average particles dimension of synthesis silica with 1.5, 2 and 2.5 N NaOH are 120, 100 and 80 nm respectively. The SEM micrographs showed that the Concentration of NaOH was increased, the particles dimension decreased

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The Influence of Heat and Two Stages Precipitation in the Process of Natural Polymer Purification from the Byproduct of Bioethanol Process Base on Empty Palm Fruit Bunch

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1123.177 ◽

2015 ◽

Vol 1123 ◽

pp. 177-181

Author(s):

Achmad Hanafi ◽

Harry Budiman ◽

Fauzan Aulia

Keyword(s):

Sulfuric Acid ◽

Sodium Hydroxide ◽

Room Temperature ◽

Black Liquor ◽

Ash Content ◽

Natural Polymer ◽

Palm Fruit ◽

Second Stage ◽

Direct Precipitation ◽

Two Stages

The biopolymer material, lignin, was recovered from the black liquor by acidification of the black liquor using sulfuric acid. Several purification techniques were carried out to produce the high purity of lignin such as gradual precipitation of lignin from black liquor (first stage: precipitation at pH 7, second stage: precipitation at pH 2) and the diluting of crude lignin by sodium hydroxide then followed by re-precipitation at different temperature. Subsequently, the impurities of lignin product resulted from each purification techniques was determined as ash content that analyzed using temperature program furnace; and the content of lignin was investigated using spectrophotometer UV-Vis. The result showed that the content of lignin of material produced from gradual precipitation was approximately 77.6%. It was higher than the content of lignin about 3.4% of material produced from direct precipitation to pH 2. In addition, the elevating of temperature from 40 to 60°C was no considerably affect to the content of lignin in precipitate produced from re-precipitation of crude lignin solution in sodium hydroxide. Nonetheless, the content of lignin of precipitate improved 15% when the temperature of re-precipitation of crude lignin solution in sodium hydroxide was raised from room temperature to 40-60°C.

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Preliminary Investigation on Sodium Alginate Extracted from Sargassum Subrepandum of Red Sea of Eritrea as Tablet Binder

Journal of Scientific Research ◽

10.3329/jsr.v3i3.6770 ◽

2011 ◽

Vol 3 (3) ◽

pp. 609-618 ◽

Cited By ~ 7

Author(s):

N. S. Basha ◽

R. Rekha ◽

A. Letensie ◽

S. Mensura

Keyword(s):

High Temperature ◽

Sodium Alginate ◽

Room Temperature ◽

Preliminary Investigation ◽

Hydroxypropyl Methylcellulose ◽

Extraction Methods ◽

Binding Property ◽

Alkaline Extraction ◽

Suitable Alternative ◽

Binding Strength

Natural polysaccharides hold advantages over synthetic polymers for conventional and novel dosage forms, because these are non-toxic, less expensive, and biodegradable. These can also be modified to tailor-made materials and thus can compete with the available synthetic excipients. Therefore, the aim of present work is to extract sodium alginate from the seaweed S. subrepandum to assess its binding property using propranolol as model drug. Sodium alginate was extracted by room-temperature alkaline extraction and high-temperature (80°C) alkaline extraction methods. Binding strength was evaluated by using two different formulations i.e., formulation 1 with sodium alginate as a binder and formulation 2 with hydroxypropylmethylcellulose (HPMC) as reference standard. The two tablet formulations were evaluated and compared for parameters such as friability, hardness and disintegration. The percentage yield was found to be 17.5% w/w by room-temperature alkaline extraction and 21%w/w by high-temperature extraction method. The results obtained for all tested parameters for tablets with sodium alginate were found within acceptable range of USP standards. It was also founded that both sodium alginate and HPMC have similar binding strength at similar concentration. So, it can be concluded that sodium alginate of S. subrepandum can be used as suitable alternative binder in tablet formulations.Keywords: Sargassum subrepandum; Sodium alginate; Hydroxypropyl methylcellulose; Friability; Hardness; Disintegration.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i3.6770 J. Sci. Res. 3 (3), 619-628 (2011)

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Tensile Properties and Dynamic Mechanical Behaviour of Natural Rubber Compound Filled with Rice Husk Silica Produced via Solvent-Thermal Extraction Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.947.195 ◽

2019 ◽

Vol 947 ◽

pp. 195-199

Author(s):

Zainathul Akhmar Salim Abdul Salim ◽

Aziz Hassan ◽

Hanafi Ismail ◽

Nor Hafizah Che Ismail

Keyword(s):

Natural Rubber ◽

Tensile Properties ◽

Rice Husk ◽

Mechanical Behaviour ◽

Extraction Method ◽

Silica Content ◽

Rice Husk Silica ◽

Dynamic Mechanical ◽

Thermal Extraction ◽

Rubber Filler

This study highlighted the effect of incorporation of rice husk silica (RHS) on the tensile properties and dynamic mechanical behaviour of natural rubber (NR) compounds. High purity RHS was synthesised by solvent-thermal extraction method, which was inspired by TAPPI T204 cm-97 and TAPPI T264 cm-97 standards with some modifications. The extraction method had successfully produced RHS with 99.9% of silica content and surface area of 234.25 m2/g. The incorporation of RHS in NR showed increment in tensile properties compared to unfilled NR. Further improvement was recorded by surface modification of RHS with 1 wt. % bis (triethoxysilylpropyl) tetrasulfide (TESPT). The modification of RHS with TESPT increased the rubber-filler interaction between RHS and NR matrix, hence enhancing the strength-related properties. The modified RHS-NR also recorded highest storage modulus, and the presence of RHS in the NR compound had slightly shifted the glass transition temperature (Tg) to a higher value. This confirmed that the strong rubber-filler interaction had increased the rigidity of the compounds and restricted the mobility of the rubber chains.

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Intercalation of pentane into the stage 2 to 4 cesium graphitides: Relation between cesium density in the intercalated layers and the stage of the parent binary

Journal of Materials Research ◽

10.1557/jmr.1993.2288 ◽

1993 ◽

Vol 8 (9) ◽

pp. 2288-2298 ◽

Cited By ~ 2

Author(s):

H. Pillière ◽

M. Goldmann ◽

F. Béguin

Keyword(s):

Room Temperature ◽

Three Dimensional ◽

Structural Transformations ◽

Layer Model ◽

Simultaneous Formation ◽

Ternary Compounds ◽

Second Stage ◽

The Third ◽

Cesium Ions ◽

Third Stage

Isotherms (at 300 K and 328 K) and isobars (in the range 300 to 400 K) of n-pentane intercalation in CsC24 and CsC36 were established. With CsC24, three plateaus were identified at 0.52, 0.7, and 1.0 n-pentane/24 C, whereas only two plateaus at 0.8 and 0.97 n-pentane/36 C were found with CsC36. The progress of the reaction between n-pentane and CsC24, CsC36, and CsC56 (stage 2 to 4) was monitored by real-time neutron diffraction. The intercalation of n-pentane in CsC24 results in the simultaneous formation of a second stage ternary and a first stage binary “CsC8”, whereas, from the third stage CsC36 or the fourth stage CsC56, only pure second stage or third stage ternary compounds are formed, respectively. Owing to the formation of binary domains rich in alkali metal (CsC8) or to stage lowering produced by the ternarization, the in-plane cesium density is smaller in the ternary layer than in the starting binary. The electrostatic repulsion between the cesium ions, provoked by the sorption of n-pentane, is believed to be at the origin of the increased coverage. During the intercalation or de-intercalation processes, three-dimensional segregation occurs in each grain. A pleated layer model with canted fronts is presented. It accounts for the various phases present within each grain and for the structural transformations caused by pressure variations. At room temperature, the ternary layer seems to be disordered. The order-disorder transition appearing either by decreasing the temperature or by increasing the n-pentane pressure is correlated to a hindered motion of the intercalated molecules.

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Fabrication of superhydrophobic composite coating based on fluorosilicone resin and silica nanoparticles

Royal Society Open Science ◽

10.1098/rsos.180598 ◽

2018 ◽

Vol 5 (7) ◽

pp. 180598 ◽

Cited By ~ 5

Author(s):

Xiaoming Wang ◽

Xingeng Li ◽

Qingquan Lei ◽

Yaping Wu ◽

Wenjing Li

Keyword(s):

Silica Nanoparticles ◽

Composite Coating ◽

Room Temperature ◽

Silica Content ◽

Superhydrophobic Coating ◽

Polymer Model ◽

Modified Silica ◽

Sliding Angle ◽

Water Contact ◽

Modified Silica Nanoparticles

Composite superhydrophobic coating built with film former and filler is attracting much attention for its facile and convenient fabrication, but significant limitations and disadvantages still remain. In this paper, a composite superhydrophobic coating is introduced which can be cured at room temperature and made by dispersing modified silica nanoparticles with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane in fluorosilicone resin. Silica content and dispersion time showed obvious influences on the morphology and topography of composite coating by reuniting dispersed nanoparticles to form peaks on the surface. Excessively large distances between these peaks would decrease water contact angle value. Increasing slope of peaks, appropriate distance between peaks and decreasing diameter size of peaks would diminish sliding angle value. Formation mechanism of the composite coating based on fluorosilicone resin and modified nanoparticles was explained using interpenetrating polymer model.

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Simple radioimmunoassay of cortisol in diluted samples of human plasma.

Clinical Chemistry ◽

10.1093/clinchem/24.9.1468 ◽

1978 ◽

Vol 24 (9) ◽

pp. 1468-1472 ◽

Cited By ~ 5

Author(s):

T M Connolly ◽

P Vecsei

Keyword(s):

Human Plasma ◽

Plasma Proteins ◽

Extraction Method ◽

Plasma Cortisol ◽

Room Temperature ◽

Binding Proteins ◽

Abnormal Protein ◽

Protein Carriers ◽

Direct Competition

Abstract We describe a simple radioimmunoassay of plasma cortisol, which can be performed in 3 h and which requires no purification, heating, or refrigeration steps. The plasma proteins are inhibited through direct competition between them and the antiserum at room temperature, at which the antiserum's affinity exceeds that of the binding proteins. Plasma, diluted with water, is incubated for 3 h at room temperature with [3H]cortisol and the antiserum. We compared results with those by the usual extraction method. The correlation between methods on evaluating normal samples with one antiserum. We compared results with those by the usual extraction method. The correlation between methods on evaluating normal samples with one antiserum was r = 0.954 (P less than 0.001), and the slope was 0.661. With three other antisera it was r = 0.922 (P less than 0.001) and slope 0.644. Plasmas with abnormal protein concentrations (i.e., from preganant women, and after corticotropin administration), tested to examine the validity of the method for routine use, and to define the role of the protein carriers, showed r = 0.859 (P less than 0.001) and slope 0.726 for the four antisera used. Additional samples, assayed with diluted standards plus stripped plasma, showed a correlation with the usual extraction method of r = 0.945 (P less than 0.001) and slope 1.026.

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Alkaline Extraction Method of Cottonseed Protein Isolate

Modern Applied Science ◽

10.5539/mas.v3n3p77 ◽

2009 ◽

Vol 3 (3) ◽

Cited By ~ 11

Author(s):

Buning Zhang ◽

Yingde Cui ◽

Guoqiang Yin ◽

Xinming Li ◽

Xiaoxia Zhou

Keyword(s):

Extraction Method ◽

Protein Isolate ◽

Alkaline Extraction ◽

Cottonseed Protein

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Isolation of Quality Total RNA from the Aromatic Plant Origanum onites

Zeitschrift für Naturforschung C ◽

10.1515/znc-2010-3-415 ◽

2010 ◽

Vol 65 (3-4) ◽

pp. 266-270 ◽

Cited By ~ 1

Author(s):

Īsmail Poyraz ◽

Emel Sözen ◽

Muhittin Arslanyolu

Keyword(s):

Phenolic Compounds ◽

Medicinal Plants ◽

Reverse Transcription ◽

Extraction Method ◽

Room Temperature ◽

Aromatic Plant ◽

Guanidine Isothiocyanate ◽

Total Rna ◽

Root Tissues ◽

Origanum Onites

We successfully used the guanidine isothiocyanate method for isolation of total RNA from leaf, stem, and root tissues of the aromatic plant Origanum onites. The RNA was extracted with TRI Reagent® at room temperature and was recovered by isopropanol precipitation. The isolated RNA was capable of reverse transcription. The extraction method described here does not require ultracentrifugation, and it is fast, simple, and effective. The procedure can be completed within 3 hours and may be applicable to other aromatic medicinal plants containing high amounts of phenolic compounds.

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