Comparative assessment of compost and zeolite utilisation for the simultaneous removal of BTEX, Cd and Zn from the aqueous phase: Batch and continuous flow study

Simantiraki, Fotini; Gidarakos, Evangelos

doi:10.1016/j.jenvman.2015.04.043

Cited by 40 publications

(10 citation statements)

References 52 publications

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“…It is therefore critical to remove Cd from industrial wastewater before discharge into the environment. Removal of Cd ions (Cd 2+ ) from aqueous solutions by absorption has been reported, for example, using peanut shell, zeolite, coal fly ash, activated carbon, and biochar [20–23]. To our knowledge, the removal of Cd 2+ by adsorption onto biomass ash, particularly its modified product, has never been studied.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium, Kinetic, and Thermodynamic Studies on the Adsorption of Cadmium from Aqueous Solution by Modified Biomass Ash

Zheng

Cui

et al. 2017

Bioinorganic Chemistry and Applications

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Natural biomass ash of agricultural residuals was collected from a power plant and modified with hexagonal mesoporous silica and functionalized with 3-aminopropyltriethoxysilane. The physicochemical and morphological properties of the biomass ash were analyzed by ICP-OES, SEM, TEM-EDS, FTIR, and BET analysis. The adsorption behavior of the modified product for Cd2+ in aqueous solution was studied as a function of pH, initial metal concentration, equilibrium time, and temperature. Results showed that the specific surface area of the modified product was 9 times that of the natural biomass ash. The modified biomass ash exhibited high affinity for Cd2+ and its adsorption capacity increased sharply with increasing pH from 4.0 to 6.0. The maximum adsorption capacity was 23.95 mg/g in a pH 5 solution with an initial metal concentration of 50 mg/L and a contact time of 90 min. The adsorption of Cd2+ onto the modified biomass ash was well fitted to the Langmuir model and it followed pseudo-second-order kinetics. Thermodynamic analysis results showed that the adsorption of Cd2+ was spontaneous and endothermic in nature. The results suggest that the modified biomass ash is promising for use as an inexpensive and effective adsorbent for Cd2+ removal from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Equilibrium, Kinetic, and Thermodynamic Studies on the Adsorption of Cadmium from Aqueous Solution by Modified Biomass Ash

Zheng

Cui

et al. 2017

Bioinorganic Chemistry and Applications

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“…Toluene and xylenes are also used as solvent in other industries polluting soil, air, groundwater, and surface water [5,6]. The maximum permissible concentration of toluene, ethylbenzene, and xylenes in drinking water are 0.7, 0.3, and 0.5 mg/L, respectively [7]. These compounds have irreparable impression in human health including: cancer, respiratory problems, and disruption of liver and kidney, irritation of mucosal membranes and hematological changes [2,3].…”

Section: Introductionmentioning

confidence: 99%

Adsorption performance of modified graphene oxide nanoparticles for the removal of toluene, ethylbenzene, and xylenes from aqueous solution

Azizi

Torabian

Hassani

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe purpose of this study was to investigate the effect of graphene oxide nanoparticles modified with 4-aminodiphenylamine (GO-A) on the removal of toluene, ethylbenzene, and p-,o-xylene (TEX). Nano-sorbent was characterized using Fourier transform infrared resonance spectroscopy, carbon, hydrogen and nitrogen elemental analysis, BrunauerEmmett-Teller analysis, and transmission electron microscopy. The effect of different experimental parameters including contact time, pH, and initial concentration of adsorbate and adsorbent were examined. According to the results, an optimum TEX removal efficiency was observed at contact time = 5 min, pH 4, and adsorbent dose = 1 g/L at 20 mg/L initial TEX concentration. Besides, the point of zero charge (pH pzc ) was evaluated to be 4. The adsorption isotherms (Langmuir, Freundlich, and Dubinin-RadushKevich) and kinetics (pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich) were used to indicate the isotherm and kinetic parameters. The adsorption process followed Langmuir isotherm and pseudo-second-order kinetic. Finally, GO-A was regenerated at seven cycles for the TEX removal confirming its good regeneration capacity.

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“…The results shown in Table 1 are generally within the range of the expected values for these material typologies. In comparison, studies with MSW-derived composts revealed pH H2O values in the range between 7.0 and 8.5 [50,105,106]. Smaller values (5.4 to 6.7) were presented by Simantiraki et al [106] for materials with shorter maturation times.…”

Section: Compost and Peat Propertiesmentioning

confidence: 86%

Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost

et al. 2021

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Anthropogenic activities can lead to elevated concentrations of potentially toxic elements (PTEs) in soil and water. Thus, the search for low-cost, ecofriendly and innovative sorbents is a global necessity. The present investigation addresses the performance of peat and compost derived from the organic fraction of municipal solid waste (OFMSW) as a sorbent of zinc (Zn), lead (Pb) and cadmium (Cd). The physicochemical features and effects of the initial concentration (equilibrium) and contact time (kinetic) were systematically analyzed by batch experiments. In addition, human bioaccessibility tests were conducted to compare the human health risk of these PTEs postsorption. The results showed that the sorption capacities followed the order: compost(Pb) > peat(Pb) > compost(Cd) > compost(Zn) > peat(Cd) > peat(Zn), indicating that compost had a better sorption potential. Kinetic data were well-fitted to the pseudo-first-order (PSO), pseudo-second-order (PFO), and Elovich equation models. The external diffusion model proposed by Mathews and Weber (M&W) indicated the contribution of diffusion as a sorption mechanism, mainly in the sorption of Zn, Pb and Cd onto compost and Pb onto peat. The bioaccessible fractions in the first stage (stomach conditions) were greater than those in the second phase (intestinal simulation). Pb has higher sorption capacities (10.511 and 7.778 mg g−1 for compost and peat, respectively) and lowers fraction bioaccessible (35 to 70%). These findings demonstrate that utilizing these low-cost sorbents seems promising for the remediation of PTE soils and contaminated waters. However, more experiments should be conducted, including desorption and multielement solutions, as well as field-tests to prove the long-term effects of application in large-scale and real conditions.

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Comparative assessment of compost and zeolite utilisation for the simultaneous removal of BTEX, Cd and Zn from the aqueous phase: Batch and continuous flow study

Cited by 40 publications

References 52 publications

Equilibrium, Kinetic, and Thermodynamic Studies on the Adsorption of Cadmium from Aqueous Solution by Modified Biomass Ash

Equilibrium, Kinetic, and Thermodynamic Studies on the Adsorption of Cadmium from Aqueous Solution by Modified Biomass Ash

Adsorption performance of modified graphene oxide nanoparticles for the removal of toluene, ethylbenzene, and xylenes from aqueous solution

Sorption Efficiency of Potentially Toxic Elements onto Low-Cost Materials: Peat and Compost

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