Adsorptive removal of methylene blue from aqueous solution using coal fly ash-derived mesoporous silica material

Yuan, Ning; Cai, Hui; Tian, Li; Huang, Qingjiu; Zhang, Xinling

doi:10.1177/0263617419827438

Cited by 87 publications

(48 citation statements)

References 43 publications

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“… where C 0 is the highest initial concentration of Rhodamine B (mg l −1 ). The R L value reveals the isotherm shape as follows: irreversible ( R L = 0), favorable (0 < R L < 1), linear ( R L = 1), unfavorable ( R L > 1) (Hameed et al., 2009; Yuan et al., 2019). The values of R L for the adsorption of Rhodamine B on CT269DR resin in the present work are in the range of 0.0037– 0.0215 (see Table 2) which exhibits that the adsorption is favorable.…”

Section: Resultsmentioning

confidence: 99%

Rhodamine B removal from aqueous solution by CT269DR resin: Static and dynamic study

Yang

Shu-yue

Chen

et al. 2019

Adsorption Science & Technology

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The adsorption of Rhodamine B onto CT269DR resin has been studied through static and dynamic experiments. The effects of shaking speed, resin dosage, and pH on adsorption were investigated by static experiments. The external mass transfer rate remains substantially unchanged when the shaking speed exceeds 160 r min−1. The optimal pH range is 5–8, and an increase of resin dosage can directly improve the percentage of removal of Rhodamine B. The equilibrium isotherm data of Rhodamine B on CT269DR resin fit the Langmuir adsorption isotherm well. The thermodynamics parameters, Δ H = 69.93 kJ mol−1, Δ S = 326.73 J mol−1 K−1, and Δ G < 0, demonstrate that the adsorption of Rhodamine B onto CT269DR resin is spontaneous and endothermic. The pseudo first-order kinetic model can be successfully used to represent the adsorption process and the activation energy is 25.7 kJ mol−1. The dynamic experiments show that the breakthrough point is advanced when the flow rate increases and the bed adsorption capacity increases with increasing temperature. Furthermore, the desorption using the solution of 2% NaOH is suitable for desorption and reusing process, and scanning electron microscope (SEM) and fourier transform infrared spectroscopy (FT-IR) analysis reveals that used resin has good wear resistance and chemical stability. The results confirm that CT269DR resin can be employed as an efficient adsorbent for the removal of Rhodamine B from wastewater.

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Section: Resultsmentioning

confidence: 99%

Rhodamine B removal from aqueous solution by CT269DR resin: Static and dynamic study

Yang

Shu-yue

Chen

et al. 2019

Adsorption Science & Technology

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“…Konsentrasi MB yang tersisa dalam larutan selanjutnya ditentukan menggunakan spektrofotometer UV-Vis (Shimadzu UV-1800) pada panjang gelombang 664 nm. Data yang diperoleh selanjutnya dianalisis menggunakan model isoterm adsorpsi Langmuir, Dubinin-Raduskevich (D-R), dan Freundlich yang telah dideskripsikan dalam berbagai publikasi (Shaibu et al, 2014;Santhosh et al, 2014;Li et al, 2016;Yuan et al, 2019).…”

Section: Metode Penelitianunclassified

“…Persamaan isoterm Langmuir dipakai untuk mendeskripsikan adsorpsi pada permukaan homogen dan dapat dinyatakan dengan persamaan linear (Yuan et al, 2019): ce/qe = 1/(kL qm) + (ce/qm)…”

Section: Metode Penelitianunclassified

“…di mana ce adalah konsentrasi pada saat kesetimbangan (mg L -1 atau ppm), qe adalah jumlah MB teradsorpsi saat kesetimbangan (mg g -1 ), qm adalah kapasitas adsorpsi (mg g -1 ), dan kL adalah konstanta kesetimbangan adsorpsi (L mg -1 ). Persamaan isoterm Freundlich mendeskripsikan adsorpsi pada permukaan heterogen dan dapat dinyatakan dalam bentuk linear (Yuan et al, 2019): log qe = (l/n)(log ce) + log KF…”

Section: Metode Penelitianunclassified

“…(2) dengan n adalah faktor heterogenitas dan KF adalah konstanta Freundlich yang menunjukkan kapasitas adsorpsi. Model isoterm adsorpsi Dubinin-Raduskevich dapat dinyatakan dengan persamaan linear (Yuan et al, 2019):…”

Section: Metode Penelitianunclassified

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Adsorpsi Metilen Biru Pada Hidroksiapatit Dari Tulang Ikan Kakap Merah

Wuntu¹,

Koleangan²,

Wuntu³

2020

JIS

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Adsorpsi Metilen Biru Pada Hidroksiapatit Dari Tulang Ikan Kakap MerahABSTRAKPenelitian yang bertujuan untuk mempelajari adsorpsi metilen biru pada hidroksiapatit yang diperoleh dari tulang ikan kakap merah (Lutjanus sp.) telah dilakukan. Tulang dikalsinasi dalam tanur pada 600, 800, dan 1000 oC, digerus, dan diayak dengan ayakan 100 mesh. Material tersebut selanjutnya digunakan dalam eksperimen adsorpsi dan data yang diperoleh dianalisis menggunakan model isoterm adsorpsi Langmuir, Freundlich, dan Dubinin-Raduskevich. Hasil penelitian menunjukkan bahwa semakin tinggi suhu kalsinasi, semakin rendah kapasitas adsorben untuk mengadsorpsi metilen biru. Energi adsorpsi yang dihitung berada dalam kisaran 0,84-1,14 kJ mol-1 yang mengindikasikan bahwa metilen biru teradsorpsi secara fisik pada adsorben dan adsorpsi cenderung mengikuti model isoterm adsorpsi Freundlich.Kata kunci: kakap merah, hidroksiapatit, metilen biru, adsorpsi Adsorption of Methylene Blue on Hydroxyapatite from Red Snapper Fish Bones ABSTRACTA research aimed to study the adsorption of methylene blue on hydroxyapatite obtained from red snapper fish bones (Lutjanus sp.) was performed. The bones were calcined in a furnace at 600, 800, and 1000 oC and ground to pass a 100 mesh sieve. The materials were used in the adsorption experiment and the data obtained were analyzed using Langmuir, Freundlich, and Dubinin-Raduskevich adsorption isotherm models. The results showed that the higher the calcination temperature, the lower the capacity of the adsorbent to adsorb methylene blue. Calculated adsorption energy which was in a range of 0.84-1.14 kJ mol-1 indicated that the dye was adsorbed physically on the adsorbent and the adsorption could be well described by Freundlich adsorption isotherm model.Keywords: red snapper, hydroxyapatite, methylene blue, adsorption

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Effect of temperature and fly ash content on the catalytically pyrolyzed rice straw biochar–fly ash composites for methylene blue adsorption

Bhardwaj

Nag

Hussain

et al. 2022

Asia-Pacific J Chem Eng

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Rice straw and fly ash are the wastes produced in abundance which need immediate attention for their management. In the present study, the in situ pyrolysis of rice straw in presence of fly ash was carried out and the resultant composites were studied for adsorption of methylene blue (MB). Slow pyrolysis of rice straw in presence of fly ash is evaluated using thermogravimetric analysis (TGA) and Coats-Redfern equation for pseudo-first-order reaction kinetics, respectively. The activation energy (E a ) for the pyrolysis of rice straw was 41.75 kJ/mol which was lowered to 37.39 kJ/mol in presence of fly ash. Biochar fly ash composites BFA4 1-3 , BFA5 1-3 , and BFA6 1-3 were prepared at three 400 C, 500 C, and 600 C pyrolysis temperature, respectively, the subscript indicating three different ratios of rice straw and fly ash (1:3, 1:1, and 3:1 w/w ratio). The composites BF4-6 1-3 were neutral to alkaline in pH, due to the presence of basic oxide and carbonates minerals. BFA4-6 1-3 was studied for batch adsorption of MB and optimized for pH, dose, and initial concentration of adsorbate. The maximum MB adsorption capacity of 25.91 mg/g was reported for the composite BFA4 1 . MB adsorption efficiency (q e ) followed the trend BFA4 1-3 > BFA5 1-3 > BFA6 1-3 , which indicates a strong influence of biochar surface functional groups on dye adsorption, as reiterated by the multiple linear regression (MLR) analysis. Stripping of MB was achieved using methanol as a stripping agent for MB-adsorbed BFA4-6 1-3 with desorption efficiency of 7% to 11% in the first cycle and 23% to 100% in the second cycle.Thus, the biochar fly ash composite with optimum ion exchangeable functional organic moieties would be suitable for dye remediation and waste generated in the process could find application in soil amelioration. K E Y W O R D S adsorption-desorption, composite biochar, dye, thermogravimetric analysis Akanksha Bhardwaj and Shilpa Nag have equal contributions to the paper.

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Adsorptive removal of methylene blue from aqueous solution using coal fly ash-derived mesoporous silica material

Cited by 87 publications

References 43 publications

Rhodamine B removal from aqueous solution by CT269DR resin: Static and dynamic study

Rhodamine B removal from aqueous solution by CT269DR resin: Static and dynamic study

Adsorpsi Metilen Biru Pada Hidroksiapatit Dari Tulang Ikan Kakap Merah

Effect of temperature and fly ash content on the catalytically pyrolyzed rice straw biochar–fly ash composites for methylene blue adsorption

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