Estimation of Specific Surface Area using Langmuir Isotherm Method

Itodo, A. U.; Itodo, HU; Gafar, M. K.

doi:10.4314/jasem.v14i4.63287

Cited by 50 publications

(42 citation statements)

References 4 publications

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“…But from Fig-15, it was evident that the line in the initial stage does not pass through the origin instead it depicts two linear portions; the first part of the curve is due to boundary layer diffusion whereas the last part of the curve is due to the diffusion of Pb 2+ ions [57,58]. Table 5.…”

Section: Intraparticle Diffusionmentioning

confidence: 99%

Removal of copper(II) from aqueous solution using nanochitosan/sodium alginate/microcrystalline cellulose beads

Vijayalakshmi¹,

Gomathi²,

Latha

et al. 2016

International Journal of Biological Macromolecules

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Section: Intraparticle Diffusionmentioning

confidence: 99%

Removal of copper(II) from aqueous solution using nanochitosan/sodium alginate/microcrystalline cellulose beads

Vijayalakshmi¹,

Gomathi²,

Latha

et al. 2016

International Journal of Biological Macromolecules

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“…For example, in a study of the sorptive capacity of granular activated carbon using the cationic dye methylene blue, the authors observed that sorption was directly proportional to the dosage of size-fractionated carbon [24]. Additionally, methylene blue and several other dyes exhibit Langmuir sorption characteristics similar to our observed sorption of denatonium ions onto powdered activated carbon (Figure 4) [26]- [28]. Sorption of organic molecules or ions to highsurface area sorbents can be influenced by number of solution conditions including pH, ionic strength, temperature, nature of background electrolyte, etcetera [29] [30].…”

Section: Discussionmentioning

confidence: 49%

Activated Carbon and Clay Minerals for the Sorptive Removal of Denatonium Ions from Denatonium Benzoate Solutions

Crosson¹,

Crosson²,

Thorpe³

et al. 2014

JWARP

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This study assessed the feasibility of utilizing activated carbon and clay minerals for treating water impacted with the bittering agent denatonium benzoate (DB). Our specific study objectives were to 1) evaluate denatonium ion sorption to smectite clay minerals (bentonite and hectorite) and activated carbon (powdered and granular) at constant pH and ionic strength and 2) examine the impact of pH on denatonium ion sorption to each solid material. The experimental results indicated that high doses (33,000 mg/L) of as-received granular activated carbon and as-received clay minerals completely removed denatonium from aqueous solutions containing 100 -1000 mg/L denatonium benzoate. Powdered activated carbon at doses of 5 -100 mg/L exhibited favorable monolayer sorption of denatonium ions from a pH 6.95, 70 mg/L aqueous denatonium benzoate solution with a Langmuir separation factor (r) of 0.481, a maximum sorption capacity (Sm) of 74 mg/g, and a Langmuir constant of 15.3 L/g. A maximum removal of 23% of denatonium was achieved at the highest powdered activated carbon dosage employed. Denatonium ion removal with peroxide treated bentonite and peroxide treated hectorite did not result in complete removal of the ion and exhibited favorable sorption as evidenced by Freundlich 1/n values ranging from 0.803 to 1.194; Freundlich constants (Kf) ranged from 8 ng/L to 575 ng/L. Denatonium ion sorption to peroxide treated bentonite appeared to depend on pH while hectorite sorption of denatonium ions was independent of hydrogen ion concentrations. For powdered activated carbon adsorption, as pH increased denatonium ion sorption decreased. Overall, the work demonstrates that denatonium can be effectively removed from water via activated carbon or clay mineral sorption.

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“…Penentuan gliserol total dilakukan berdasarkan metode FBI-A02-03 (FBI, 2006a (Itodo, Itodo, & Gafar, 2010). Sisa metilen biru yang tidak teradsorbsi ditentukan dengan spektrofotometer UV Vis pada panjang gelombang 664 nm.…”

Section: Penentuan Gliserol Totalunclassified

Pemanfaatan Abu Sekam Padi Untuk Pemurnian Bahan Baku Dan Produk Biodiesel Dari Minyak Jelantah

Istiningrum¹,

E.A²,

Sulfiah³

et al. 2017

j. sains. teknologi.

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Abu sekam padi (ASP) merupakan limbah pada proses pembakaran batu bata yang berpotensi sebagai adsorben karena memiliki kandungan silika yang tinggi. Penelitian ini bertujuan untuk mengetahui potensi abu sekam padi sebagai adosorben pada proses pembuatan biodiesel dari minyak jelantah. Abu sekam padi diaplikasikan dalam pemurnian minyak jelantah dan juga produk biodiesel. Penelitian ini dilakukan dengan beberapa tahap yaitu karakterisasi ASP, pemurnian minyak jelantah, pembuatan biodiesel melalui transesterifikasi dengan katalis NaOH, pemurnian biodiesel dengan ASP 1, 3, 5% serta karakterisasi biodiesel. Abu sekam padi memiliki luas area spesifik dengan metode metilen biru sebesar 119,59 m2/g. Abu sekam padi dapat menurunkan kadar asam lemak bebas dalam minyak jelantah sebesar 62,4%. Proses transesterifikasi minyak jelantah menghasilkan biodiesel sebesar 96%. Masa ASP optimum untuk memurnikan biodiesel adalah 3% dengan nilai bilangan asam, gliserol total dan bilangan ester berturut-turut adalah 2,5 mg KOH/g, 0,37% dan 98,37%.

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Estimation of Specific Surface Area using Langmuir Isotherm Method

Cited by 50 publications

References 4 publications

Removal of copper(II) from aqueous solution using nanochitosan/sodium alginate/microcrystalline cellulose beads

Removal of copper(II) from aqueous solution using nanochitosan/sodium alginate/microcrystalline cellulose beads

Activated Carbon and Clay Minerals for the Sorptive Removal of Denatonium Ions from Denatonium Benzoate Solutions

Pemanfaatan Abu Sekam Padi Untuk Pemurnian Bahan Baku Dan Produk Biodiesel Dari Minyak Jelantah

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