Efficient removal of toxic metal ions from wastewater using a recyclable nanocomposite: A study of adsorption parameters and interaction mechanism

Alqadami, Ayoub Abdullah; Naushad, Mu.; Abdalla, M. Sebawe; Ahamad, Tansir; ALOthman, Zeid A.; Alshehri, Saad M.; Ghfar, Ayman A.

doi:10.1016/j.jclepro.2017.04.085

Cited by 247 publications

(73 citation statements)

References 67 publications

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“…It was found that pseudo-first-order model (plots not shown here) did not fit well for the three metal ions. Pseudo-second-order model [15,48] on the other hand showed good linearity as shown in Fig. 6a.…”

Section: Adsorption Kinetic Modelsmentioning

confidence: 85%

“…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%

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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: Adsorption Kinetic Modelsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Heavy metal removal from industrial effluent using bio-sorbent blends

Sreedhar

Reddy

2019

SN Appl. Sci.

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“…Furthermore, the colored form of MB cannot be biodegraded more easily as compared to its reduced colorless form. Several methods have been designed for the removal of MB and other organic pollutants from waste water such as adsorption desorption strategy [3][4][5][6], c-irradiation [7], ozonation [8][9][10], photocatalysis [11][12][13], ion exchange [14], membrane separation [2], reverse or forward osmosis [15], electrochemical methods [16,17], biochemical materials [18][19][20], but all these methods are either very expensive or cannot remove the pollutants completely. Chemical reduction method used to convert these dyes from toxic state to nontoxic or less toxic form is very easy and environmentally friendly, but the reduction of these dyes without catalyst takes much time.…”

Section: Introductionmentioning

confidence: 99%

Ag-loaded thermo-sensitive composite microgels for enhanced catalytic reduction of methylene blue

Shah

Sayed

Fayaz

et al. 2017

Nanotechnol. Environ. Eng.

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In this work, we report the synthesis of composite system pNAC, composed of silver nanoparticles embedded in pure thermo-sensitive crosslinked polymer network of poly(N-isopropylacrylamide-co-acrylamide) (pNA), using as a catalyst for the reduction of methylene blue (MB) dye by sodium borohydride (NaBH 4 ). The pNA was prepared by conventional free radical polymerization technique using sodium dodecyl sulfate as stabilizing agent, followed by in situ reduction of AgNO 3 inside the polymer network by NaBH 4 for the synthesis of composite systems pNACs. The synthesized pNA and pNACs were characterized by FTIR, dynamic light scattering, thermogravimetric analysis, scanning electron microscopy and UV-visible spectroscopy techniques. The materials were found sensitive toward temperature change of the medium. The entrapment ability of pNA toward different amounts of AgNO 3 solution was studied, and effect of metal content on particle size of pNACs was analyzed. The pNACs were applied as a catalyst for the reduction of MB in which they exhibit high catalytic activity and reusability toward the reaction.

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“…The process of water use now indicates that by 2025, only one‐third of the world's population will have access to clean water. Therefore, it is essential to use a reliable method for treating contaminants in wastewater . Many methods are used for treating organic contaminants in wastewater, including adsorption, photocatalytic, biological, chemical oxidation and ozonation methods .…”

Section: Introductionmentioning

confidence: 99%

Novel NiFe/Si/Au magnetic nanocatalyst: Biogenic synthesis, efficient and reusable catalyst with enhanced visible light photocatalytic degradation and antibacterial activity

Shirzadi‐Ahodashti

Ebrahimzadeh

Amiri

et al. 2020

Applied Organom Chemis

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The aim of this paper is to biosynthesize NiFe2O4/SiO2/Au (NiFe/Si/Au) magnetic nanocatalyst using the sonochemical method. This is the first study to synthesize this compound using this method. To obtain optimum morphology and size of products, the synthesis was performed in the presence of polyvinylpyrrolidone, maltose, glucose, and fructose as capping agents and Crataegus pentagyna leaf extract and NaBH4 as reducing agents. Vibrating‐sample magnetometer, field‐emission scanning electron microscopy, Fourier‐transform infrared, transmission electron microscopy, X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, and differential reflectance spectroscopy techniques were performed to confirm the preparation of magnetic products. The as‐synthesized magnetic samples were used to enhance the photocatalytic degradation and antibacterial activity. The NiFe/Si/Au nanocatalysts exhibited an excellent photocatalytic activity by degradation of rhodamine b, methylene blue, and erythrosine as organic contaminants under ultraviolet and visible light irradiation. The degradation curves illustrate that the degradation of anionic dyes is more than that of cationic dyes. In addition, antibacterial activity of as‐prepared nanocatalyst against seven bacterial species was investigated. Because of their antibacterial effects, as‐synthesized products show a high antibacterial activity against various bacteria. Consequently, the NiFe/Si/Au nanocatalysts with high antibacterial activity and excellent potential photocatalyst activity can be used in environmental and medical sciences for wastewater treatment.

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Efficient removal of toxic metal ions from wastewater using a recyclable nanocomposite: A study of adsorption parameters and interaction mechanism

Cited by 247 publications

References 67 publications

Heavy metal removal from industrial effluent using bio-sorbent blends

Heavy metal removal from industrial effluent using bio-sorbent blends

Ag-loaded thermo-sensitive composite microgels for enhanced catalytic reduction of methylene blue

Novel NiFe/Si/Au magnetic nanocatalyst: Biogenic synthesis, efficient and reusable catalyst with enhanced visible light photocatalytic degradation and antibacterial activity

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