Biosorption mechanism of Methylene Blue from aqueous solution onto White Pine (Pinus durangensis) sawdust: Effect of operating conditions

Salazar-Rábago, Jacob Josafat; Leyva‐Ramos, Roberto; Rivera‐Utrilla, J.; Ocampo-Pérez, Raúl; Cerino-Córdova, F. J.

doi:10.1016/j.serj.2016.11.009

Cited by 193 publications

(100 citation statements)

References 45 publications

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“…MB-loaded FTIR spectrum found at 3398 and 1701 cm −1 indicates that hydroxyl and carboxyl groups, respectively, were effective for MB adsorption onto JSC. Similar results were found in other studies where MB was removed by Ficus carica bast [9] and white pine sawdust [23]. The morphology and surface characteristics of JSC, before (Fig.…”

Section: Characterization Of Jscsupporting

confidence: 89%

“…1a, and this discloses the presence of several functional groups for binding MB molecules onto the JSC. The adsorption peak at 3398 cm −1 (H-bonded OH group, mostly found in cellulose) and 2987 cm −1 (C-H stretching vibration of -CH 2 -, usually found in lignin, cellulose and hemicellulose) was the primal peak of JSC [4,23]. Carboxyl acid groups and different types of hemicellulose were presented in 1701 cm −1 peak [4,21].…”

Section: Characterization Of Jscmentioning

confidence: 99%

“…MB was purchased from Sigma-Aldrich, USA. The formula of MB is C 16 H 18 ClN 3 S.xH 2 O, molecular weight 319.9 g/mol, solubility 43 × 10 3 mg/L at 25 °C, pK a 3.8 [23] and purity 88%. The stock solution of MB (100 mg/L) was prepared by dissolving the required amount of MB powder in doubledistilled water.…”

Section: Preparation and Analysis Of Test Watermentioning

confidence: 99%

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Jute (Corchorus olitorius) stick charcoal as a low-cost adsorbent for the removal of methylene blue dye from aqueous solution

Chakraborty¹,

Islam²,

Zaman³

et al. 2020

SN Appl. Sci.

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Removal of methylene blue (MB) dye from aqueous solution was studied using jute stick charcoal (JSC), prepared from jute (Corchorus olitorius) stick: an affordable and available agricultural by-product, as a low-cost adsorbent. All the experiments were carried out in batch mode. Controlling factors of the system, including contact time, solution pH, JSC dose and initial MB concentration, were investigated to study their effects on MB adsorption. JSC was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscope. Adsorption equilibrium data fitted well with Freundlich and Halsey adsorption isotherms that describe the multilayer adsorption on heterogeneous surface. The maximum adsorption capacity calculated by the Langmuir isotherm was 29.32 mg/g. The MB adsorption process was well described by the pseudo-second-order kinetic model, and the MB diffusion in JSC was the potential rate-controlling step. Finally, JSC is a promising adsorbent for the adsorption of MB from aqueous solution.

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Section: Characterization Of Jscsupporting

confidence: 89%

Section: Characterization Of Jscmentioning

confidence: 99%

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Jute (Corchorus olitorius) stick charcoal as a low-cost adsorbent for the removal of methylene blue dye from aqueous solution

Chakraborty¹,

Islam²,

Zaman³

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…The lowest sorption capacities Q for both TT (Q TT = 12 mg/g d.w.) and MB (Q MM = 4 mg/g d.w.) dyes were observed at low initial pH value (pH 0 = 2.0) which could be closely related to protonation of binding sites on biomass surface. The low adsorption capacity of MB can also be explained by the fact that MB is mainly found as undissociated species MB 0 (99% at pH = 2.0 and 86% at pH = 3.0) [26]. Obtained results indicate that an increase in pH has a positive effect on TT and MB sorption, since the competitions between dye cations and protons for the binding sites decreases and such curves (Figure 2A) represent a typical cationic dye sorption behavior [10,18].…”

Section: Influence Of Phmentioning

confidence: 87%

“…Obtained results indicate that an increase in pH has a positive effect on TT and MB sorption, since the competitions between dye cations and protons for the binding sites decreases and such curves (Figure 2A) represent a typical cationic dye sorption behavior [10,18]. MB can also be explained by the fact that MB is mainly found as undissociated species MB 0 (99% at pH = 2.0 and 86% at pH = 3.0) [26]. Obtained results indicate that an increase in pH has a positive effect on TT and MB sorption, since the competitions between dye cations and protons for the binding sites decreases and such curves ( Figure 2A) represent a typical cationic dye sorption behavior [10,18].…”

Section: Influence Of Phmentioning

confidence: 92%

Removal of Synthetic Dyes by Dried Biomass of Freshwater Moss Vesicularia Dubyana: A Batch Biosorption Study

et al. 2018

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Abstract:In this work the biosorption of cationic dyes thioflavin T (TT) and methylene blue (MB) from single and binary solutions on dried biomass of freshwater moss Vesicularia dubyana as a function of contact time, pH, and biomass or sorbate concentration has been investigated. The prediction of maximum sorption capacities using adsorption isotherm models were also realized. Biosorption of TT and MB is a rapid process strongly affected by solution pH. Maximum sorption capacities Q max calculated from Langmuir isotherm were 119 ± 11 mg/g for TT and 229 ± 9 mg/g for MB. In binary mixture, the presence of MB caused significant decrease of TT sorption, advocating the competitive sorption between TT and MB. Results revealed that V. dubyana biomass exhibited significantly higher affinity to thiazine dye MB in comparison with benzothiazole dye TT from both single and binary solutions. Based on the obtained results, the competitive effects in binary system can substantially influence the sorption process and should be thoroughly evaluated before application of selected adsorbents for removal of basic dyes from colored effluents.

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Fully Programmable Collective Behavior of Light‐Powered Chemical Microrobotics: pH‐Dependent Motion Behavior Switch and Controlled Cancer Cell Destruction

Děkanovský

Ying

Zelenka

et al. 2022

Adv Funct Materials

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The development of fuel‐free light‐powered multi stimuli‐responsive microrobots is becoming a vital field in biomedical research. The challenge is to design biomedical robots with precise motion control and novel functionalities such that one day they will stand alongside medical staff as fully fledged partners in the delivery of advanced non‐invasive therapeutic procedures. In this study, a simple one‐step etching/polymerization procedure is used to fabricate crystalline metal‐organic framework structures surface‐coated with a conductive polypyrrole (PPy) layer and then enriched with Methylene Blue sensitizer molecules. Due to the PPy surface charge, the microrobots start to move when exposed to a visible light source, enabling the controllable accumulation of the microrobots at the focal point of the light beam. Furthermore, a self‐regulated motion is achieved by the PPy surface charge also providing a pH‐dependent switch capable of altering microrobot behavior. In vitro study is conducted to test microrobot efficiency against human cervix carcinoma HeLa cells. It is shown that the micromotors are able to penetrate and successfully destroy the cancer cells. The work provides proof‐of‐concept for a novel strategy in which such microrobots can be guided by an optical beam, can self‐regulate movement toward or away from each other, and can perform therapeutic functions with great efficiency.

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Biosorption mechanism of Methylene Blue from aqueous solution onto White Pine (Pinus durangensis) sawdust: Effect of operating conditions

Cited by 193 publications

References 45 publications

Jute (Corchorus olitorius) stick charcoal as a low-cost adsorbent for the removal of methylene blue dye from aqueous solution

Jute (Corchorus olitorius) stick charcoal as a low-cost adsorbent for the removal of methylene blue dye from aqueous solution

Removal of Synthetic Dyes by Dried Biomass of Freshwater Moss Vesicularia Dubyana: A Batch Biosorption Study

Fully Programmable Collective Behavior of Light‐Powered Chemical Microrobotics: pH‐Dependent Motion Behavior Switch and Controlled Cancer Cell Destruction

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