Waste of Mytella Falcata shells for removal of a triarylmethane biocide from water: Kinetic, equilibrium, regeneration and thermodynamic studies

Quintela, Daniel Uchoa; Henrique, Daniely Carlos; Lins, Pollyanna Vanessa dos Santos; Ide, Alessandra Honjo; Erto, Alessandro; Duarte, José Leandro da Silva; Meili, Lucas

doi:10.1016/j.colsurfb.2020.111230

Cited by 20 publications

(4 citation statements)

References 75 publications

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“…Moreover, the obtained Δ H 0 and Δ S 0 values were positive (Table S1), confirming an endothermic adsorption, which presented an inconsistency with adsorption isotherms results. Chemisorption has enthalpy values ranging from 80.0 to 450.0 kJ/mol, whereas electrostatic interaction has values between 20.0 and 80.0 kJ/mol . According to the obtained Δ H 0 value of 37.2 kJ/mol (Table S1), it is possible to say that chromium(VI) uptake onto the Ni x Co y ZIF-67 is directed by electrostatic interaction consistent with the obtained conclusions from the zeta-potential observation and sample pH optimization step.…”

Section: Resultssupporting

confidence: 81%

Efficient Ion Separation from Environmental and Biological Samples Using a Novel Sorbent Based on Ni-Substituted ZIF-67: Optimization, Equilibrium, Kinetic, and Thermodynamic Study

Zakernezhad

Seidi

Manouchehri

2021

Ind. Eng. Chem. Res.

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After routine alkali treatment of industrial wastewaters, a subsequent purification step is required before discharging the resulting effluent due to the remaining trace amount of chromium(VI) at milligram per liter levels. In the present study, a simple one-step synthesis was carried out to fabricate a new adsorbent of Ni x Co y ZIF-67 for adsorption and removal of wastewaters containing chromium(VI) efficiently. To find optimum adsorption conditions of chromium(VI), the sample pH effect, initial concentration of chromium(VI), temperature, contact time, and adsorbent amount were examined. At 298 K, an adsorption capacity of 30.3 mg/g was calculated. Analyzing the mechanism of removal indicated that the chromium(VI) uptake by Ni x Co y ZIF-67 fits with the Langmuir and Dubinin–Radushkevich isotherms well and follows a pseudo-second-order kinetic approach. Also, a positive ΔG and negative ΔH and ΔS indicated adsorption that is endothermic and occurs spontaneously. Electrostatic attractions of chromium(VI) anions by the positively charged surface of the adsorbent and ion exchange with the hydroxyl groups of the adsorbent surface can be ascribed as the mechanism of adsorption. Under the optimized conditions, the detection limit was 0.003 mg/L, and the quantification limit was 0.010 mg/L. The linear range of the calibration plot was between 0.010 and 2.0 mg/L (R 2 > 0.9900). The intraday and interday RSDs% at two concentration levels of 0.05 and 0.20 mg/L were less than 3.4%. Eventually, the applicability of the presented method was evaluated for measuring trace amounts of chromium(VI) in blood samples. Acceptable relative recoveries of 82–93% were achieved. Overall, it can be concluded that Ni x Co y ZIF-67 can be introduced as a promising sorbent for the determination of chromium(VI) into complex biological fluids and its decontamination from industrial wastewaters.

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Section: Resultssupporting

confidence: 81%

Efficient Ion Separation from Environmental and Biological Samples Using a Novel Sorbent Based on Ni-Substituted ZIF-67: Optimization, Equilibrium, Kinetic, and Thermodynamic Study

Zakernezhad

Seidi

Manouchehri

2021

Ind. Eng. Chem. Res.

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“…Adsorption is recognized as an effective process for water treatment due to certain characteristics, such as high efficiency, feasibility, low cost, flexibility, simplicity, wide processing range, cost-effective applications for water treatment, easy operation and implementation, great availability, and the possibility of adsorbents’ regeneration. A very important aspect is that the adsorption-based processes do not result in the formation of hazardous substances/by-products [ 1 , 3 , 11 , 12 , 13 ].…”

Section: General Backgroundmentioning

confidence: 99%

Layered Double Hydroxides as Rising-Star Adsorbents for Water Purification: A Brief Discussion

et al. 2022

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Within the frame of this article, briefly but comprehensively, we present the existing knowledge, perspectives, and challenges for the utilization of Layered Double Hydroxides (LDHs) as adsorbents against a plethora of pollutants in aquatic matrixes. The use of LDHs as adsorbents was established by considering their significant physicochemical features, including their textural, structural, morphological, and chemical composition, as well as their method of synthesis, followed by their advantages and disadvantages as remediation media. The utilization of LDHs towards the adsorptive removal of dyes, metals, oxyanions, and emerging pollutants is critically reviewed, while all the reported kinds of interactions that gather the removal are collectively presented. Finally, future perspectives on the topic are discussed. It is expected that this discussion will encourage researchers in the area to seek new ideas for the design, development, and applications of novel LDHs-based nanomaterials as selective adsorbents, and hence to further explore the potential of their utilization also for analytic approaches to detect and monitor various pollutants.

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“…The negative and low ΔH° values indicate the weak adsorption forces and physical and exothermic nature [12,[75][76][77].…”

Section: Thermodynamic Studymentioning

confidence: 99%

Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

Oliveira

Meneses

Melo

et al. 2022

Environ Sci Pollut Res

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The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500º C and activation with potassium carbonate.The activated carbon was used for caffeine removal from aqueous solution. The coconut leaves activated carbon showed a predominantly amorphous structure from X-ray diffraction analysis and a pH at the zero charge point of 7.9. From the N2 adsorption/desorption method, the adsorbent showed a predominance of mesopores, with average pore size of 45.48 ηm and a surface area of 678.03 m 2 /g. From kinetic studies the data followed the pseudo-second order, where the intraparticle diffusion can be neglected. The adsorption isotherms were satisfactorily adjusted for the Redlich-Peterson model and a type curve L was identified. The thermodynamic parameters showed that adsorption occurred spontaneously, was exothermic and governed by physical adsorption. The artificial neural networks developed were capable of predicting both kinetics and equilibrium adsorption data under different operating conditions and was comparable to the traditional models available in literature in the training experiments, encouraging its use for data generalization when an efficient dataset is used. In conclusion, coconut leaves waste showed to be a promising feedstock to produce activated carbon aiming caffeine removal from water and wastewater.

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Waste of Mytella Falcata shells for removal of a triarylmethane biocide from water: Kinetic, equilibrium, regeneration and thermodynamic studies

Cited by 20 publications

References 75 publications

Efficient Ion Separation from Environmental and Biological Samples Using a Novel Sorbent Based on Ni-Substituted ZIF-67: Optimization, Equilibrium, Kinetic, and Thermodynamic Study

Efficient Ion Separation from Environmental and Biological Samples Using a Novel Sorbent Based on Ni-Substituted ZIF-67: Optimization, Equilibrium, Kinetic, and Thermodynamic Study

Layered Double Hydroxides as Rising-Star Adsorbents for Water Purification: A Brief Discussion

Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf

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