Sulfate decontamination from groundwater by metal layered double hydroxides functionalized high phosphorus iron ore waste as a new green adsorbent: Experimental and modeling

Sadeghalvad, Bahareh; Azadmehr, Amirreza; Hezarkhani, Ardeshir

doi:10.1016/j.ecoleng.2017.05.047

Cited by 18 publications

(6 citation statements)

References 39 publications

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“…In this study, the design of experiments and process optimization were done using RSM–BBD method (by Design-Expert Software (DX-11)) to evaluate the effects of the above-mentioned operating parameters on the efficiency of HMs removal (as the response), including Zn, Pb, Cd, Cu, Cr, Mn, Al, and Fe. RSM is the most effective method of design of experiment (DOE) and optimization technique that has been applied in chemical and biochemical processes in recent years. − Furthermore, BBD is a specific design under the category of the RSM to reduce experimental trials, determine the significance of the influential parameters, and find out optimum operating conditions. , Finally, the adequacy of the best fitted model(s) is evaluated by some checking tests provided by the analysis of variance (ANOVA). ,− (See more in SI section S2.4.1. )…”

Section: Methodsmentioning

confidence: 99%

Effective Pretreatment of Heavy Metal-Contaminated Biomass Using a Low-Cost Ionic Liquid (Triethylammonium Hydrogen Sulfate): Optimization by Response Surface Methodology–Box Behnken Design

Dastyar

Zhao

Yuan

et al. 2019

ACS Sustainable Chem. Eng.

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Recently, dealing with generated heavy metal-contaminated biomasses (HMCBs) harvested from phytoextraction process has drawn increasing attention. In this study, the feasibility of an HMCB (willow) pretreatment using a low-cost ionic liquid (IL), namely, triethylammonium hydrogen sulfate [TEA][HSO4], is investigated to remove the high contents of HMs prior to further thermochemical and biological valorization. The operating variables were temperature (75–105 °C), IL:biomass (10:1–30:1) ratio, and time (4–8 h) with constant feedstock particle size (0.35 mm). According to results obtained from response surface methodology–Box Behnken design (RSM–BBD), the optimum conditions of the IL-based pretreatment of HMCB for maximum HMs’ removal are temperature, 93 °C; IL:biomass ratio, 30:1; and time, 7.12 h. Under the optimum conditions, the IL is found to solubilize lignin and hemicellulose respectively about 70.54% and 92.56%; and subsequently, effective removal of HMs from HMCB is obtained (Cu, 100%; Zn, 88.77%; Mn, 79.70%; Fe, 73.11%; Cd, 70.42%; Al, 34.53%; and Cr, 18.17%), while Pb removal is negligible. The average amount of confidence intervals of developed models is ∼95%, and generally, the ratio of IL:biomass shows a higher effect on the efficiency of biomass fractionation and HMs’ removal, compared with temperature and time; however, interactions between the operating parameters are negligible.

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Section: Methodsmentioning

confidence: 99%

Effective Pretreatment of Heavy Metal-Contaminated Biomass Using a Low-Cost Ionic Liquid (Triethylammonium Hydrogen Sulfate): Optimization by Response Surface Methodology–Box Behnken Design

Dastyar

Zhao

Yuan

et al. 2019

ACS Sustainable Chem. Eng.

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“…However, as the sulfate concentration in solution increased, the amount of sulfate adsorbed reached a limit value and decreased. The behavior of MC suggested that there is a strong affinity between sulfate ions and adsorbent, although it showed worse performance than B 1:1 [4]. According to the standard error (SE) and R 2 values, Dubinin-Radushkevich's model fits the data better when using MC.…”

Section: Adsorption Equilibriummentioning

confidence: 99%

“…Several physical, biological and chemical processes have been investigated for the removal of sulfates dissolved in water and wastewater. These processes include adsorption [4], electrocoagulation [5], ion exchange [6], chemical precipitation [7], coagulation, crystallization, membrane filtration and reverse osmosis [8]. Adsorption removal is widely used due to its capacity for fast and effective removal.…”

Section: Introductionmentioning

confidence: 99%

Efficient Sulfate Adsorption on Modified Adsorbents Prepared from Zea mays Stems

et al. 2021

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The effect of temperature on the sulfate adsorption capacity of adsorbents prepared from corn stalks (Zea mays) was evaluated. Two bioadsorbents were prepared from biomass: a biochar modified with H2SO4 with mass: volume ratio 1:1 (B 1:1), and cellulose modified with cetyl trimethyl ammonium chloride (CTAC). There were also determined thermodynamic parameters (ΔG°, ΔS° and ΔH°) and it was studied the adsorption kinetics and isotherm. At 25 °C was obtained the highest adsorption capacity of 16.4 and 7.4 mg/g with mass/volume ratio B 1:1 and modified corn (MC) respectively; it was observed an adverse effect of temperature increase on bioadsorbents’ performance. The thermodynamic parameters showed that the adsorption process is exothermic, not spontaneous, and it was given by chemisorption. Adsorption kinetics showed that equilibrium was reached at 420 min and that the pseudo-second-order model adjusted the experimental data with R2 > 0.98 and qe of 16.64 and 7.48 mg/g for B 1:1 as well as MC. The adsorption isotherm showed a good fit to Freundlich’s model when using B 1:1, whereas using MC as adsorbents the data was adjusted by Dubinin-Radushkevich’s model. Zea mays stems are an abundant agricultural residue and are a good source for the preparation of biochar type bioadsorbents as well as the extraction of cellulose, its use is recommended in the removal of sulfates in solution.

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“…Considering θ, the kinetics model of the adsorption process can be predicted. With considering the theoretical and empirical θ values, the amounts of adsorption capacity could be predicted by high accuracy (Boyd et al, 1947;Sadeghalvad et al, 2017). For example, for both Fig.…”

Section: Geometric Modelmentioning

confidence: 99%

Mechanistic evaluation of cationic dyes adsorption onto low-cost calcinated aerated autoclaved concrete wastes

Gheibi

Eftekhari

Tabrizi

et al. 2021

Int. J. Environ. Sci. Technol.

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Application of construction and demolition (C&D) wastes were considered as sustainable development goals (SDGs) for maintaining raw materials. Also, lightweight concretes such as aerated autoclaved concrete (AAC) were used for partitioning spaces in the building industry. Moreover, the waste products of the mentioned materials were increased due to the rise of old construction demolitions. This study contributes a calcinated aerated autoclaved concrete (CAAC) which is efficient, powerful, highly rapid, non-expensive and novel adsorbent for the removal of cationic dyes including malachite green (MG), methyl violet (MV) and methylene blue (MB) form water samples. The impacts of different variables for the proposed system including initial pH value, stirring rate, dye concentration and contact time are explored to optimize the selected analyses. Most notably, this study analyzes the experimental isotherm data by using two-parameter isotherms such as Dubinin-Radushkevich, Temkin, Langmuir and Freundlich equations and three-parameter isotherms including Koble-Corrigan, Toth, Redlich-Peterson and Sips models. The maximum adsorption capacities for MG, MB and MV are 370.4, 256.4 and 277.8 mg g −1 , respectively. In addition, five kinetic models, Elovich, intraparticle diffusion, main equations of pseudo-first-and second-order, and Boyd mathematical models are employed to follow the kinetic parameters and adsorption process of each dye. The Boyd equations indicate that with regard to all three dyes and at all concentrations, the film diffusion is dominant over intraparticle diffusions. Almost none of the geometric plots of adsorption and desorption curves intersected, indicating the adsorption process is optimally performed. KeywordsCalcinated aerated autoclave concrete • Methylene blue • Methyl violet • Malachite green • Adsorption kinetics and isotherm; Mathematical models * A. M. Fathollahi-Fard

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Sulfate decontamination from groundwater by metal layered double hydroxides functionalized high phosphorus iron ore waste as a new green adsorbent: Experimental and modeling

Cited by 18 publications

References 39 publications

Effective Pretreatment of Heavy Metal-Contaminated Biomass Using a Low-Cost Ionic Liquid (Triethylammonium Hydrogen Sulfate): Optimization by Response Surface Methodology–Box Behnken Design

Effective Pretreatment of Heavy Metal-Contaminated Biomass Using a Low-Cost Ionic Liquid (Triethylammonium Hydrogen Sulfate): Optimization by Response Surface Methodology–Box Behnken Design

Efficient Sulfate Adsorption on Modified Adsorbents Prepared from Zea mays Stems

Mechanistic evaluation of cationic dyes adsorption onto low-cost calcinated aerated autoclaved concrete wastes

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