Adsorptive performance of MOF nanocomposite for methylene blue and malachite green dyes: Kinetics, isotherm and mechanism

Alqadami, Ayoub Abdullah; Naushad, Mu.; ALOthman, Zeid A.; Ahamad, Tansir

doi:10.1016/j.jenvman.2018.05.090

Cited by 294 publications

(96 citation statements)

References 51 publications

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“…Adsorption has been an important area of interest in the recent years, with majority latest research focused on identifying low-cost adsorbents [9]. Research work is also being done to synthesize new adsorbents with some recent advances in novel adsorbents which include using activated carbon synthesized from peanut shell [10], alizarin red-S-loaded amberlite IRA-400 anion exchange resin [11], starch/SnO 2 nanocomposite [12], Fe 3 O 4 nanocomposites [13], MOF (metal organic framework)-based composites [14,15], nickel ferrite bearing nitrogen-doped mesoporous carbon (NiFe 2 O 4 -NC) [16], nanocomposite cation exchanger sodium dodecyl sulfate acrylamide Zr(IV) selenite (SDS-AZS) [17] for removing toxic heavy metals. Such adsorbents are specially tailored to give them favorable properties like high adsorption capacity, regeneration capability, high surface area, mechanical and thermal stability [18,19].…”

Section: Introductionmentioning

confidence: 99%

Heavy metal removal from industrial effluent using bio-sorbent blends

Sreedhar

Reddy

2019

SN Appl. Sci.

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There is extensive literature on the use of adsorbents derived from waste to treat industrial effluents containing heavy metal ions. However, there is limited information on the use of adsorbent blends. This is applicable for treating effluents which contain a number of heavy metals, so any one single adsorbent may not be suitable for achieving high percent removal of all ions. The present work employs adsorbent blends to treat an electrochemical effluent in batch mode. This work aims to provide valuable insights on the interaction of heavy metals with the adsorbents in blends. Effluent from an electrochemical industry was treated with blends of calcium bentonite, fly ash and wheat bran in different compositions to remove heavy metal ions (Fe, Ni, Cu, As, Zn, Cd) from an aqueous effluent solution. The optimal set of conditions identified were pH, 5-7; contact time, 60-90 min; agitation speed of 200 rpm; adsorbent dosage of 1 g/50 mL; and particle size of 150-300 μ. Metal ions arsenic, zinc and cadmium were completely removed. The percentage removal of (Fe, Ni, Cu) metal ions was in the order Fe(II)(96.73%) > Ni(II)(74.03%) > Cu(II)(70.70%) at optimum conditions in a short equilibrium time of 90 min. Batch experiments were conducted to determine the factors such as adsorbent composition, temperature, pH, agitation speed, dosage, contact time and particle size affecting adsorption, and all these parameters were found to strongly influence the adsorption. Experimental data were analyzed for Langmuir and Freundlich isotherms. Langmuir isotherm shows the maximum adsorption capacities were in order Fe(II)146.1 mg/g > Ni(II) 115.9 mg/g > Cu(II) 74.5 mg/g. Freundlich parameter 'n' was found to be greater than 1 which showed that the adsorption is feasible for all three metals. Freundlich isotherm fit the data comparatively better, but neither of the two isotherms satisfactorily explained the adsorption, which indicated heterogeneity of adsorption. Kinetic studies were performed and analyzed for pseudo-first-and pseudo-second-order kinetics and the Weber-Morris intraparticle diffusion model. The adsorption data fit accurately to pseudo-second-order kinetic model with coefficient of correlation values greater than 0.99 for all three heavy metals. The kinetic constants were found to be 8.49 * 10 −3 , 5.82 * 10 −3 , 5.27 * 10 −3 g mg min for Fe(II), Ni(II) and Cu(II), respectively. From the intraparticle diffusion model, it was inferred that there were different rate-limiting steps during the duration of the adsorption process, including intraparticle diffusion and boundary layer diffusion.

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Section: Introductionmentioning

confidence: 99%

Heavy metal removal from industrial effluent using bio-sorbent blends

Sreedhar

Reddy

2019

SN Appl. Sci.

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“…About 50% of the dyes used in textile industries alone go into the effluent [1]. These residual dyes are quite stable in the aquatic system and potentially hazardous to the environment and aquatic life as these interrupt light penetration, gas solubility and phytoplankton's photosynthesis [2]. Also, many of these dyes disintegrate to give toxic, carcinogenic and mutagenic products [3].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of Remazol Brilliant Blue R dye from its aqueous solution by activated charcoal of Thuja orientalis leaves: an eco-friendly approach

et al. 2020

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Anthraquinone dyes are one of the major water pollutants due to their stability and persistence in the aquatic system. The present study describes the use of activated charcoal prepared from Thuja orientalis leaves (ACTOL) as an adsorbent to remove reactive anthraquinone dye Remazol Brilliant Blue R (RBBR) from its aqueous solution. In this work, leaves of the plant were carbonated to get fine charcoal which was activated by acid treatment and analysed by BET, SEM and FTIR techniques. Batch experiments were conducted to study the effect of pH, contact time, concentration and amount of adsorbent on the removal of RBBR in the concentration range 0.1-6.65 m mol L −1 . The highest efficiency was found to be 81% at pH 6 and contact time of 300 min. Adsorption data were analysed by Langmuir, Freundlich and Temkin isotherm models. The adsorption was found to follow Freundlich adsorption isotherm (R 2 = 0.9972). The kinetic study of the process was done by analysing the time adsorption data with pseudo-first-order, pseudo-second-order and intraparticle diffusion models, and it was found to obey pseudo-second-order kinetics. The adsorbent showed 73% of efficiency even after four regeneration cycles. FTIR analysis revealed that the various groups present at the surface of adsorbent were responsible for uptake of dye molecules. This study reveals that leaves of Thuja orientalis, a common biowaste, can be used as an efficient adsorbent for the removal of RBBR dye from its aqueous solution. It provides an economical and eco-friendly way to mitigate the waste and use it as an adsorbent.

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“…Various physicochemical and biological methods such as chemical coagulation, ozonation, chemical and electrochemical oxidation, adsorption, photocatalysis, aerobic and anaerobic digestion etc., are widely used for decolourisation of dye-containing wastewater [9][10][11][12]. Despite several techniques available, adsorption is considered most promising due to its extensive applicability, ease of operation and cost-effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Murthy

Gowrishankar

Chandraprabha

et al. 2020

Mater. Res. Express

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Solution combustion synthesis of calcium aluminate (CaAl 2 O 4 ) nanocomposite using coffee husk extract and its adsorption capacity for removal of Congo red (CR) and Indigo carmine (IC) are reported. Physiochemical properties of adsorbent were studied by PXRD, SEM, TEM and point of zero charge. Batch adsorption studies were conducted to study the effect of adsorbent dosage, pH, contact time, initial dye concentration and temperature on adsorption efficiency of coffee husk derived calcium aluminate nanocomposite (CHCA). Among the isotherms used, Langmuir model explained best the equilibrium data and the maximum monolayer adsorption capacity was found to be 377 and 135 mg/g for CR and IC, respectively. Mass transfer analysis indicated adsorptive removal of dyes was controlled by both external and internal diffusion. Pseudo-first-order model fitted best with experimental kinetic data and adsorption efficiency increased with an increase in the initial bulk concentration of CR and IC. Thermodynamic analysis indicated that adsorption of CR and IC on CHCA is feasible, spontaneous and exothermic in nature. The magnitude of enthalpy and heat of adsorption suggested that the adsorption is physical in nature. The present study explores the potential of coffee husk extract, an agro-based bio-waste, as a novel and eco-friendly fuel in the synthesis of CHCA and the synthesised nanocomposite as a potential adsorbent for the removal of synthetic dyes.

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Adsorptive performance of MOF nanocomposite for methylene blue and malachite green dyes: Kinetics, isotherm and mechanism

Cited by 294 publications

References 51 publications

Heavy metal removal from industrial effluent using bio-sorbent blends

Heavy metal removal from industrial effluent using bio-sorbent blends

Adsorptive removal of Remazol Brilliant Blue R dye from its aqueous solution by activated charcoal of Thuja orientalis leaves: an eco-friendly approach

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

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