Removal of copper ions from electroplating effluent solutions with native corn cob and corn stalk and chemically modified corn stalk

Vafakhah, Sareh; Bahrololoom, M.E.; Bazargan‐Lari, Reza; Saeedikhani, Mohsen

doi:10.1016/j.jece.2014.01.005

Cited by 94 publications

(39 citation statements)

References 18 publications

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“…Cellulose, hemicellulose, and lignin are the three main components of biomass materials. Hemicellulose is the easiest to pyrolyze, followed by cellulose and then lignin, the most difficult one (Vafakhah et al 2014). The first stage weight loss of samples between 230 °C and 310 °C can be attributed to the pyrolysis of hemicellulose (Wang et al 2008).…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Huang¹,

Wu²,

Zhou³

et al. 2015

BioResources

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aTo help better utilize corn stalk (CS), pyrolysis behavior of materials from different parts of the CS including corn stalk without pith, corn root, and corn leaf were analyzed using thermogravimetric analysis (TGA) at heating rates of 5, 10, 20, and 25 °C/min. The apparent activation energies determined by the Friedman method for corn stalk without pith, corn root, and corn leaf were in the range of 26.4 to 103.6 kJ/mol, 37.6 to 69.5 kJ/mol, and 35.0 to 103.9 kJ/mol, respectively, depending on the conversion. The main thermal decomposition occurred within a temperature range of 200 to 350 °C (±10 °C). Most of the volatile materials decomposed at less than a 0.8 conversion rate. At greater than a 0.8 conversion rate, the remaining material was mainly char, and the decomposition of char proceeded at higher conversion rates. Different pyrolysis characteristics in the CS indicated that different treatments should be chosen according to different parts for achieving the optimum conversion rate in practical applications.

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Huang¹,

Wu²,

Zhou³

et al. 2015

BioResources

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“…Solid residues from corn production such as corn cobs present great potential for use as raw materials in the production of adsorbents [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Batch and Column Studies of Phenol Adsorption by an Activated Carbon Based on Acid Treatment of Corn Cobs

Rocha¹,

Franca²,

Oliveira³

2015

IJET

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Abstract-Corn cobs were evaluated as raw material in the production of an adsorbent for phenol removal from aqueous solutions. Adsorption kinetics and equilibrium were satisfactorily described by the pseudo second-order and Freundlich models, respectively. Fixed bed adsorption (breakthrough curve) was satisfactorily described by Bohart-Adams, Yoon-Nelson and Dose-Response models. Adsorption tests showed that the prepared adsorbent presented higher adsorption capacity than activated carbons produced from other agricultural residues, confirming that this type of waste material is a suitable candidate for use in the production of adsorbents.

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“…Kapasitas adsorpsi dapat ditingkatkan dengan meningkatkan situs adsorpsi melalui modifikasi gugus fungsi [11]. Komponen utama batang jagung adalah selulosa yang kaya akan gugus hidroksil dan gugus inilah yang berpotensi utama untuk dilakukan modifikasi melalui reaksi kimia [2,10,12,13,14]. Beberapa bahan kimia digunakan untuk memodifikasi limbah jagung dan terbukti dapat meningkatkan kapasitas adsorpsi, seperti akrilonitril [2], asam sitrat [10] dan asam nitrat [14].…”

Section: Pendahuluanunclassified

Adsorpsi Logam Ni dan Cu pada Limbah Cair Laboratorium Kimia menggunakan Biosorben Batang Jagung Termodifikasi Asam Sitrat

Yulianti

Mahmudah

Ma'rifah

et al. 2019

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Corn stalk contains 40-50% cellulose, 20-40% hemicellulose, 4-15% lignin which had potential as biosorbent in binding metal ions. In this study, demineralization and modification by adding citric acid (1.5 M and 2 M) of corn stalk were conducted to convert hydroxyl groups into carboxylic. Then, it was analyzed its functional groups using Boehm titration and FTIR. The modified corn stalk was applied directly to chemical laboratory liquid waste which contains multicomponent of heavy metal ions. By modifying the corn stalk, the number of hydroxyl and carboxylic groups increased, but the number of lactone group was constant. The success of the modification was characterized by the appearance of ester uptake at 1734 cm-1 and increased adsorption ability. The variations in the concentration of citric acid in modification corn stalk showed that biosorbent with addition 1.5 M citric acid had higher in the number of acid site than addition 2 M citric acid to absorb Ni and Cu. Keywords: Corn stalk, citric acid, biosorbent, functional group Batang jagung mengandung sekitar 40-50% selulosa, 20-40% hemiselulosa, 4-15% lignin yang berpotensi sebagai biosorben pengikat ion logam. Pada penelitian ini dilakukan demineralisasi dan modifikasi dengan penambahan asam sitrat (1,5 M dan 2 M) untuk mengubah gugus hidroksil pada selulosa membentuk karboksilat. Selanjutnya, dianalisis gugus fungsinya menggunakan titrasi Boehm dan FTIR. Hasil modifikasi diaplikasikan langsung pada limbah cair laboratorium kimia yang mengandung banyak jenis ion logam berat. Biosorben batang jagung setelah dimodifikasi mengalami peningkatan jumlah gugus fungsi hidroksil dan karboksilat, tetapi gugus lakton tetap. Keberhasilan modifikasi ditandai dengan munculnya serapan ester pada 1734 cm-1 dan peningkatan kemampuan adsorpsi. Dari hasil variasi konsentrasi asam sitrat diperoleh informasi bahwa biosorben dengan penambahan asam sitrat 1,5 M mempunyai situs asam lebih tinggi dan mempunyai kemampuan adsorpsi terhadap ion logam Ni dan Cu lebih besar dibanding penambahan asam sitrat 2 M. Kata kunci: Batang jagung, asam sitrat, biosorben, gugus fungsi

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Removal of copper ions from electroplating effluent solutions with native corn cob and corn stalk and chemically modified corn stalk

Cited by 94 publications

References 18 publications

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Thermal Decomposition Properties of Materials from Different Parts of Corn Stalk

Batch and Column Studies of Phenol Adsorption by an Activated Carbon Based on Acid Treatment of Corn Cobs

Adsorpsi Logam Ni dan Cu pada Limbah Cair Laboratorium Kimia menggunakan Biosorben Batang Jagung Termodifikasi Asam Sitrat

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