Reduction of [Fe(III)EDTA]− catalyzed by activated carbon modified with KOH solution

Yang, Lin; Chou, Xue-wei; Liu, Cong; Long, Xiang‐li; Wang, Yuan

doi:10.1016/j.jiec.2012.10.017

Cited by 17 publications

(12 citation statements)

References 25 publications

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“…It was shown that more micropores are created at impregnation ratios <1.0 : 1, but the content of micropores decreases at impregnation ratios ≥1.0 : 1 due to more excess carbon burn-off, collapse of pore walls [ 18 ], or expansion of micropores to mesopores [ 19 ]. Furthermore, the reaction between carbon and KOH may damage the micropores on the carbon surface because the concentration of KOH solution is too high [ 21 ].…”

Section: Resultsmentioning

confidence: 99%

“…During the activation in an inert atmosphere surface pyrolysis does not occur on the surface of chars, causing the surface structure to remain [ 25 ]. Finally, the strongly basic concentrated KOH solution might also destroy the pore structure of carbon [ 21 ]. These results are in accordance with the results of BET, where the average BET pore size of activated carbon is 67.9764 Å.…”

Section: Resultsmentioning

confidence: 99%

“…The intensity of this peak gradually decreases with increasing activation temperatures and impregnation ratios. The shoulder peaks at about 1500 cm −1 and 1400 cm −1 are attributed to carboxyl-carbonate structures [ 21 ]. The peak at 1400 cm −1 can be attributed to oxygen containing functional groups, for example, C=O and C–O of carboxylic groups [ 27 ] or in-plane vibration of O–H of carboxylic group [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

“…The very weak peak at about 1150 cm −1 corresponds to the stretching vibration of C–O group in alcohol, phenol, ether, or ester [ 17 ]. It could also be attributed to carboxylic groups [ 29 ], including –CO 3 group [ 18 ] and the phenolic –OH group [ 21 ]. The peak at 960 cm −1 is associated with stretching vibration of C–C or C–H groups [ 30 ] or C=O group [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

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Characterization and Properties of Activated Carbon Prepared from Tamarind Seeds by KOH Activation for Fe(III) Adsorption from Aqueous Solution

Mopoung

Moonsri

Palas

et al. 2015

The Scientific World Journal

242

100

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This research studies the characterization of activated carbon from tamarind seed with KOH activation. The effects of 0.5 : 1–1.5 : 1 KOH : tamarind seed charcoal ratios and 500–700°C activation temperatures were studied. FTIR, SEM-EDS, XRD, and BET were used to characterize tamarind seed and the activated carbon prepared from them. Proximate analysis, percent yield, iodine number, methylene blue number, and preliminary test of Fe(III) adsorption were also studied. Fe(III) adsorption was carried out by 30 mL column with 5–20 ppm Fe(III) initial concentrations. The percent yield of activated carbon prepared from tamarind seed with KOH activation decreased with increasing activation temperature and impregnation ratios, which were in the range from 54.09 to 82.03 wt%. The surface functional groups of activated carbon are O–H, C=O, C–O, –CO3, C–H, and Si–H. The XRD result showed high crystallinity coming from a potassium compound in the activated carbon. The main elements found in the activated carbon by EDS are C, O, Si, and K. The results of iodine and methylene blue adsorption indicate that the pore size of the activated carbon is mostly in the range of mesopore and macropore. The average BET pore size and BET surface area of activated carbon are 67.9764 Å and 2.7167 m2/g, respectively. Finally, the tamarind seed based activated carbon produced with 500°C activation temperature and 1.0 : 1 KOH : tamarind seed charcoal ratio was used for Fe(III) adsorption test. It was shown that Fe(III) was adsorbed in alkaline conditions and adsorption increased with increasing Fe(III) initial concentration from 5 to 20 ppm with capacity adsorption of 0.0069–0.019 mg/g.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Characterization and Properties of Activated Carbon Prepared from Tamarind Seeds by KOH Activation for Fe(III) Adsorption from Aqueous Solution

Mopoung

Moonsri

Palas

et al. 2015

The Scientific World Journal

242

100

View full text Add to dashboard Cite

show abstract

“…Karbon aktif telah digunakan secara luas sebagai adsorben, katalis, dan penyangga katalis karena memiliki luas permukaan yang besar, struktur pori dan gugus fungsi yang melimpah di permukaannya. Kemampuan adsorpsi dan katalitik karbon aktif bergantung pada struktur fisik dan sifat kimia permukaan [8]. Karbon aktif sendiri tidak dapat langsung digunakan sebagai katalis pada hidrolisis selulosa karena memiliki tingkat keasaman yang rendah, sehingga memberikan yield glukosa yang rendah.…”

Section: Teoriunclassified

Hidrolisis Selulosa Menggunakan Katalis Karbon Tersulfonasi Berbasis Cangkang Kemiri

et al. 2018

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AbstrakAlang-alang mengandung selulosa yang dapat dikonversi menjadi glukosa melalui proses hidrolisis menggunakan katalis asam cair anorganik. Penggunaan katalis tersebut dapat menyebabkan masalah korosi, mencemari lingkungan, dan pemisahan produk yang kompleks. Untuk mengatasi masalah tersebut digunakanlah katalis karbon tersufonasi. Penelitian ini bertujuan menguji cangkang kemiri sebagai sumber karbon untuk penyangga katalis yang direaksikan dengan asam sulfat, dan mengaplikasikannya dalam reaksi hidrolisis selulosa. Cangkang kemiri dikarbonisasi pada rentang suhu 300-550 o C selama 4 jam. Karbon yang terbentuk disulfonasi pada suhu 120-150 o C selama 6 jam. Karbon tersulfonasi diuji kapasitas H + /tingkat keasamaan. Karbon dengan kapasitas asam tertinggi selanjutnya digunakan sebagai katalis asam padat pada reaksi hidrolisis alang-alang. Glukosa yang diperoleh dianalisis dengan metode dinitrosalicylic acid (DNS). Hasil penelitian ini menunjukkan bahwa karbon tersulfonasi berbasis cangkang kemiri dapat digunakan sebagai katalis heterogen pada reaksi hidrolisis alang-alang.Kata kunci: cangkang kemiri, karbonisasi, sulfonasi, hidrolisis, alang-alang AbstractCogon grass (Imperata cylindrica) contains cellulose which is convertible to glucose through hydrolysis by using inorganic liquid acid catalyst. However, the use of such catalyst leads to corrosion problem, environment pollution, and complex separation. To overcome this problem, a sulfonated carbon catalyst was proposed. This study aimed to evaluate candlenut shell as carbon source for catalyst support in sulfonated carbon catalyst, and its application in cellulose hydrolysis. Candlenut shell was carbonized at 300-550 o C for 4 h. Resulting carbon was sulfonated at 120-150 o C for 6 h. Sulfonated carbon was assessed for its H + capacity/acidity. The carbon with highest acidity was applied as solid acid catalyst in cogon grass hydrolysis. Resulting glucose was analyzed by dinitrosalicylic acid (DNS) method. Results suggest that sulfonated carbon from candlenut shell can be utilized as heterogeneous catalyst in cogon grass hydrolysis.

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Regeneration of Fe II /Fe III complex from NO chelating absorption by microbial fuel cell

Liu

Yi³

et al. 2019

Environ Sci Pollut Res

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Reduction of [Fe(III)EDTA]− catalyzed by activated carbon modified with KOH solution

Cited by 17 publications

References 25 publications

Characterization and Properties of Activated Carbon Prepared from Tamarind Seeds by KOH Activation for Fe(III) Adsorption from Aqueous Solution

Characterization and Properties of Activated Carbon Prepared from Tamarind Seeds by KOH Activation for Fe(III) Adsorption from Aqueous Solution

Hidrolisis Selulosa Menggunakan Katalis Karbon Tersulfonasi Berbasis Cangkang Kemiri

Regeneration of Fe II /Fe III complex from NO chelating absorption by microbial fuel cell

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