Competitive sorption of Cd, Cr, Cu, Ni, Pb and Zn from stormwater runoff by five low-cost sorbents; Effects of co-contaminants, humic acid, salinity and pH

Esfandiar, Narges; Suri, Rominder; McKenzie, Erica R.

doi:10.1016/j.jhazmat.2021.126938

Cited by 124 publications

(34 citation statements)

References 61 publications

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“…The decrease in sorption can also be attributed to increase in ionic strength of the solution since the cations are Elovich q e /q m = K E C e exp(-q e /q m ) q max (μg g charged species. These results agree with other observations regarding efficiency of sorbents to bind heavy metals in presence of competing cations [39][40][41].…”

Section: Effect Of Competitive Cations On CD Removal By the Sorbents ...supporting

confidence: 93%

Using nano-magnesium oxide/bentonite composite for cadmium removal from industrial wastewater

Elkhatib

Moharem

Saad

et al. 2022

Environmental Engineering Research

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Nowadays, the removal of toxic heavy metals from industrial wastewater is a long standing problem due to the industrial progress worldwide. This study mainly focused on the production of a novel nMgO-bentonite nanocomposite using sol–gel method to enhance Cd ions removal from industrial wastewater. The nMgO-bentonite nano-composite was characterized for structural morphology and presence of functional groups using SEM/EDS, XRD and FTIR analysis. Cadmium sorption equilibrium and kinetic data were well fitted to Langmuir and power function models respectively as confirmed by the highest R<sup>2</sup> (0.965), and the lowest SE (38*10<sup>-6</sup>) values among other studied models. The Langmuir removal capacity of the nanocomposite is 200 mg/g which is 60 times greater than that of bentonite. Increased Cd sorption on nano-composite with increased temperature from 287 to 307K and the thermodynamic results revealed that Cd adsorption process was endothermic and spontaneous. The data also showed highly repetitive application of nano-composite during six cycles of adsorption/ desorption experiment. The final results pointed out that nMgO-bentonite nano-composite has great adsorption affinity for Cd and could potentially employ as a cost-effective, ecofriendly and efficient sorbent for Cd removal from contaminated wastewater.

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Section: Effect Of Competitive Cations On CD Removal By the Sorbents ...supporting

confidence: 93%

Using nano-magnesium oxide/bentonite composite for cadmium removal from industrial wastewater

Elkhatib

Moharem

Saad

et al. 2022

Environmental Engineering Research

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“…Te other aspect that may aid in metal ions' sorption is the rise in the pH, which promotes their precipitation from solution as hydroxides. Consequently, the adsorption is reduced due to the formation of soluble hydroxyl complexes [53]. Hydroxonium ions (H 3 O) may be tightly coupled with the surface of the adsorbent at low pH through a repulsive efect, leading to a decrease in metal ions elimination [54].…”

Section: Infuence Of Ph On Co (Ii) Removal By the Nanosorbentmentioning

confidence: 99%

Green Synthesis Ca-MgO Nanosorbent for the Uptake of Cobalt Ions from Aqueous Media

Al-Awaji

Boukriba

Idriss

et al. 2022

Advances in Materials Science and Engineering

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Ca-doped magnesium oxide nanosorbent has been prepared by sol-gel in the presence of gum arabic extract and assessed for the removal of cobalt ions (Co (II)) from aqueous media. X-ray diffraction analysis indicates the formation of MgO and CaO composites with a mean crystallite size of 6 nm having a large surface area of 50 m2/g. Scanning and transmission electron microscopy observations reveal spherical-shaped particles at the nanoscale around 20 nm. Besides, X-ray photoelectron spectroscopy and Fourier transform infrared analyses manifest the existence of functional groups, which will facilitate the adsorption of metal ions. The adsorption capability of the CaO-MgO nanosorbent achieved 469.5 mg/g for Co (II) ions under optimum operating conditions. Furthermore, the experimental data elucidate that the adsorption process is primarily diffusion-based and that both intraparticle and boundary layer diffusion appear to play a key role in the rate-controlling step. The findings of this study highlight the remediation of contaminated water by cobalt ions by CaO-MgO nanostructure and can be extended to other metal ions and organic pollutants.

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“…The general trend is to replace activated carbon-which is the so-called state of the art-with natural materials or waste/by-products from various fields of activity, such as agriculture and industry. Based on literature studies, low-cost sorbents from natural sources have been classified into the following groups [34][35][36][37]: (i) agricultural and household waste, (ii) waste and by-products, (iii) sludges, (iv) marine materials, (v) soils and ore tailings, and (vi) new low-cost adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of Heavy Metals Biosorption by Low-Cost Sorbents Using Response Surface Methodology

Ferţu

Bulgariu

2022

Processes

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This paper exploits, through modeling and optimization, the experimental laboratory data on the biosorption of heavy metal ions Pb(II), Cd(II), and Zn(II) from aqueous media using soybean and soybean waste biomasses. The biosorption modeling was performed using the Response Surface Methodology, followed by optimization based on numerical methods. The aim of the modeling was to establish the most probable mathematical relationship between the dependent variables (the biosorption efficiency of the biosorbents when adsorbing metal ions, R(%), and the biosorption capacity of sorbents, q(mg/g)) and the process parameters (pH; sorbent dose, DS (g/L); initial metal ion concentration in solution, c0 (mg/L); contact time, tc (min); temperature, T (°C)), validated by methodologies specific to the multiple regression analysis. Afterward, sets of solutions were obtained through optimization that correlate various values of the process parameters to maximize the objective function. These solutions also confirmed the performance of soybean waste biomass in the removal of heavy metal ions from polluted aqueous effluents. The results were validated experimentally.

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Competitive sorption of Cd, Cr, Cu, Ni, Pb and Zn from stormwater runoff by five low-cost sorbents; Effects of co-contaminants, humic acid, salinity and pH

Cited by 124 publications

References 61 publications

Using nano-magnesium oxide/bentonite composite for cadmium removal from industrial wastewater

Using nano-magnesium oxide/bentonite composite for cadmium removal from industrial wastewater

Green Synthesis Ca-MgO Nanosorbent for the Uptake of Cobalt Ions from Aqueous Media

Modeling and Optimization of Heavy Metals Biosorption by Low-Cost Sorbents Using Response Surface Methodology

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