Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

Meneghetti, Emerson; Baroni, Paula; Vieira, Melissa Gurgel Adeodato; Silva, Meuris Gurgel Carlos da; Beppu, Marisa Masumi

doi:10.1590/s1516-14392010000100018

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…Other low-cost adsorbents have been investigated, mainly using bioadsorbents, such as algae 11 and chitosan 12 . However, experiments carried out in fixed bed presented limited results.…”

Section: Introductionmentioning

confidence: 99%

Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems

2011

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Cu (II) removal equilibrium from aqueous solutions using calcined clays "Bofe" and "Verde-lodo" has been studied by batch and fixed-bed in static and dynamic systems, respectively. Analyses were performed for physicochemical characterization of clays using the techniques: X-ray fluorescence (XRF), thermogravimetry (TG), N 2 adsorption (BET) and Cationic Exchange Capacity (CEC). Batch experiments were performed at a constant temperature, adjusting the pH of the solution in contact with clays. Adsorption assays in fixed bed were conducted at the flow rate determined through mass transfer zone (MTZ). Langmuir and Freundlich models were adjusted to equilibrium data. The results of characterization indicated that the temperature of 500 °C is best suited for the calcination of the clays. The maximum adsorption capacity was higher for dynamic system than fixed bed compared to static system, enhancing from 0.0748 to 0.1371 and from 0.0599 to 0.22 mmol.g -1 of clay for "Bofe" and "Verde-lodo", respectively.

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“…Other low-cost adsorbents have been investigated, mainly using bioadsorbents, such as algae 11 and chitosan 12 . However, experiments carried out in fixed bed presented limited results.…”

Section: Introductionmentioning

confidence: 99%

Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems

2011

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“…Proses adsorpsi pada sistem dinamis (kontinyu/kolom) adalah proses adsorpsi di mana adsorben selalu dikontakkan dengan larutan segar dan dapat memberikan adsorpsi secara optimal sampai kondisi jenuh (Aksu, 2003). Kelebihan dari sistem dinamis yaitu sistem ini lebih berlaku untuk proses pengolahan limbah industri yang lebih nyata dan industri dalam skala besar sehingga sistem ini dapat diaplikasikan pada industri tersebut dengan diintegrasikan pada sistem alir (Meneghetti et al, 2010). Penelitian penggunaan sistem batch pada metode adsorpsi yaitu optimasi karakteristik karbon aktif pada sistem adsorbed natural gas dalam kondisi dinamis (Samid, 2011), pemanfaatan serbuk biji salak (Salacca zalacca) sebagai adsorben Cr (VI) dengan metode kolom (Aji & Kurniawan, 2012), dan optimasi parameter adsorpsi logam Pb oleh serbuk kayu pohon mangga (Mangifera indica) dalam sistem dinamis (Puspitasari, 2013…”

Section: Pendahuluanunclassified

Optimalisasi Adsorpsi Zat Warna Rhodamin B Pada Hemiselulosa Dalam Sistem Dinamis

2019

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AbstrakHemiselulosa digunakan sebagai adsorben alternatif untuk adsorpsi Rhodamin B. Penelitian ini bertujuan untuk menentukan kapasitas adsorpsi hemiselulosa terhadap rhodamin B dengan optimasi massa adsorben dan pH larutan. Kapasitas adsorpsi hemiselulosa ditentukan dengan sistem dinamis dengan kecepatan 0,08 mL/menit melalui kolom berdiameter internal 8 mm dan menggunakan persamaan Thomas. Hasil penelitian menunjukkan bahwa banyaknya zat warna Rhodamin B yang teradsorpsi pada adsorben hemiselulosa mengalami peningkatan dengan bertambahnya massa adsorben. Adsorben hemiselulosa dapat menyerap zat warna Rhodamin B paling baik pada massa adsorben 0,5 gram dan pH larutan 7,34, dengan kapasitas adsorben hemiselulosa sebesar 0,047 mg/g. Kata Kunci: Adsorben, hemiselulosa, rhodamin B, adsorpsi. AbstractHemicellulose adsorbents are used as an alternative to the adsorption of the Rhodamin B. This aim of this research is to determine the adsorption capacity of the cellulose toward rhodamine B by optimizing the amount of adsorbent and the pH of the solution. The adsorption capacity of cellulose is determined in a dynamic method with a flow rate of 0.08 mL/minutes through a column (8 mm id) and using the Thomas equation. The results showed that the amount of Rhodamin B adsorbed in the hemicellulose adsorbent increased with increasing adsorbent mass. Hemicellulose adsorbent can absorb Rhodamin B best at 0.5 gram adsorbent mass and solution pH 7.34, with hemicellulose adsorbent capacity of 0.047 mg /g.

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“…This study aims to characterize MP-AC prepared by CO2 activation for NH3 gas removal. Dynamic adsorption was used to illustrate the real conditions in the environment (Meneghetti et al, 2010;Patel, 2019) where emitted gas moves continuously through the bed. The adsorption capacities, kinetics, and isotherm were also investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Application of Mangosteen Peel Activated Carbon for Ammonia Gas Removal

Hanami

Lestari

2021

Environ. Nat. Resour. J.

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Mangosteen peel can be used as an activated carbon precursor because of its high lignin content and hardness. In this study, mangosteen peel activated carbon (MP-AC) was prepared by a physical activation method using CO2 at 850°C. The Brunauer-Emmett-Teller (BET) analysis was used to assess the optimal activation time to identify the largest surface area. The properties of MP-AC were characterized by the SEM-EDS and FTIR analyses. The results showed that MP-AC obtained from the 120-minute activation time had the largest BET specific surface area of 588.41 m2/g and was selected as an adsorbent in the dynamic adsorption of ammonia gas. The values of moisture content, ash content, and iodine number of MP-AC were 6.07%, 9.8%, and 1153.69 mg/g, respectively. Breakthrough curve indicated that with lower inlet concentration and higher adsorbent mass, longer breakthrough time is reached. Equilibrium data was best fitted to the Langmuir isotherm, while the pseudo-first order kinetic model favorably described the adsorption kinetics. The results revealed a potential to utilize MP-AC as an adsorbent for ammonia gas removal with average NH3 adsorption capacity of 0.41 mg/g.

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Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

Cited by 14 publications

References 21 publications

Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems

Cu(II) adsorption on modified bentonitic clays: different isotherm behaviors in static and dynamic systems

Optimalisasi Adsorpsi Zat Warna Rhodamin B Pada Hemiselulosa Dalam Sistem Dinamis

Characterization and Application of Mangosteen Peel Activated Carbon for Ammonia Gas Removal

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