A study of Cr(VI) and NH<sup>4+</sup>adsorption using greensand (glauconite) as a low‐cost adsorbent from aqueous solutions

Naghipour, Dariush; Taghavi, Kamran; Ashournia, Mehdi; Jaafari, Jalil; Movarrekh, Ramin Arjmand

doi:10.1111/wej.12440

Cited by 53 publications

(10 citation statements)

References 56 publications

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“…Various advanced techniques for treatment and removal of heavy metal from wastewater underwent trial in many studies [21,34]. Among them, ion-exchange, precipitation, evaporation, membrane separation, flotation, and adsorption have been well utilized for this purpose [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Mohammed

Najim

Al-Musawi

et al. 2019

J Environ Health Sci Engineer

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Purpose The present study provided a comprehensive description regarding the application of a mixture of three nonliving classes of algae as a promising and inexpensive biosorbent for removing toxic nickel (Ni(II)) ions from the aqueous medium. Methods The biosorption process was tested by varying several experimental parameters such as pH (2-8), contaminant concentration (20-300 mg/L), biosorbent content (0.2-2 g/100 mL), and temperature (20-40 °C). In addition, the competition effects of the presence of Pb(II), Cu(II), and Zn(II) ions on the Ni(II) removal efficiency was studied by varying their concentrations from 30 to 40 mg/L. ResultsThe microscopic analysis of algae demonstrated that the used biosorbent consisted mainly of Chrysophyta (80%), Chlorophyte (14%), and Cyanophyta (6%). Results demonstrated that these environmental parameters influenced the removal efficiency with a different degree and there was no stable effects rank at conditions under examination. FT-IR and SEM analysis revealed that the biosorbent surface consists of many strong and active groups of negative valences such as hydroxyl and carboxyl groups, thus exhibiting several morphological properties of interest. Further, it was found that the Temkin model best fitted the isotherm biosorption data. The kinetic study showed that the Ni(II) biosorption was rapid within first 20 min of reaction time, thereby following a pseudo-second-order model, which in turn demonstrated a chemisorption process of Ni(II) ions reaction with the biosorbent binding sites. Also, the thermodynamic study suggested that the biosorption process of Ni(II) onto algal biomass was a spontaneous and endothermic in nature. The maximum uptake of Ni(II) was 9.848 mg/g under optimized conditions and neutral environment. Conclusions Thus, this significant finding suggested a favorable and eco-friendly treatment mechanism for removal of Ni(II) ions from aqueous medium via biosorption onto the used mixture of nonliving algal biomass.

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Section: Introductionmentioning

confidence: 99%

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Mohammed

Najim

Al-Musawi

et al. 2019

J Environ Health Sci Engineer

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“…This is an expected situation. Because a higher amount of soil contains more surface area and more functional groups, this ensures that pollutant is adsorbed more 46–49 …”

Section: Resultsmentioning

confidence: 99%

“…Because a higher amount of soil contains more surface area and more functional groups, this ensures that pollutant is adsorbed more. [46][47][48][49] Figures 1d, 2d, 3d, and 4d show the effects of the initial pollution concentration and temperature on the adsorption rate (%). The role of temperature on the adsorption properties of the system is crucial because there are daily and seasonal fluctuations in the actual environmental temperature.…”

Section: Interactions Among Independent Variablesmentioning

confidence: 99%

Evaluation of factors affecting tetracycline and diclofenac adsorption by agricultural soils using response surface methodology

Güler

Tunçel

Erşan

2022

Env Prog and Sustain Energy

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The adsorption process of the pharmaceutical pollutant in the soil is affected by its physicochemical properties and soil properties. In this study, the factors affecting the adsorption of tetracycline and diclofenac onto two different soils (S and M) were investigated using response surface methodology (RSM). The RSM design was used to optimize the five variable factors (pH (2–10), contact time (5–180 min), soil amount (1–10 g/L), temperature (25–45°C)) on the adsorption of tetracycline and diclofenac. The predicted optimal conditions obtained by RSM showed that pH was the most important variable affecting the adsorption of tetracycline and diclofenac. The optimum pH for the adsorption of tetracycline and diclofenac onto the soil samples S and M were found to be 4 and 2, respectively. The adsorbed amounts of tetracycline and diclofenac onto the soils S and M were calculated to be 14.82 mg/g, 12.43 mg/g, 189.40 mg/g, and 144.81 mg/g, respectively. In addition, the effects of soil organic matter, salt, and divalent cations on the adsorption of tetracycline and diclofenac onto soils were studied. The removal of soil organic matter slightly increased tetracycline adsorption, while inhibiting diclofenac adsorption. The presence of salt and divalent cations prominently suppressed the adsorption of tetracycline and diclofenac onto soils. A possible complex mechanism was proposed for TC and DCF adsorption, including ion exchange, electrostatic interaction, and some chemical bonds.

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“…Therefore the applications of various natural adsorbents like algae, greensand, pumice, etc. are being investigated to replace activated carbon (Safari et al 2015;Naghipour et al 2016Naghipour et al , 2018Jaafari & Yaghmaeian 2019a. The vital factor for choosing an adsorbent is, of course, a high surface area, microporous structure, and a high degree of surface reactivity (Sarkar & Das 2015.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics, kinetics, and isotherms for phenol removal from wastewater using red mud

Mandal

Dey

Das

2020

Water Practice and Technology

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The phenol removal through adsorption using industrial waste has been studied. The red mud generated as waste in the aluminum plants was used in this research. The surface characterizations of red mud were assessed. The batch experiment was investigated with pH (2–12), adsorption period (120–600 min), phenol content (40–200 mg/L), adsorbent dose (2–7 g/L), and temperature (30–50 °C). At the optimum operating condition, the percentage of phenol removal was 87.5%. The pseudo-second-order kinetic model (r2 = 0.98625–0.99994) was fitted better than the pseudo-first-order kinetic model. The Freundlich isotherm model was best fitted (r2 = 0.99734–0.99955) among Langmuir, D-R, and Temkin isotherms. The Langmuir monolayer adsorption capacity was 49.30966 mg/g at 30 °C. The adsorption mechanisms were supported by Reichenberg, Fick, Elovich, Furusawa, and Smith and Boyd models (r2 > 0.8). The thermodynamics suggested for endothermic, random, and spontaneous adsorption above 50 °C. The scale-up design using Langmuir isotherm, and the disposal of used adsorbent after incineration was established in this study. The research concludes that the red mud generated from the aluminum plant can be used to remove the phenol from wastewater.

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A study of Cr(VI) and NH⁴⁺adsorption using greensand (glauconite) as a low‐cost adsorbent from aqueous solutions

Cited by 53 publications

References 56 publications

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Evaluation of factors affecting tetracycline and diclofenac adsorption by agricultural soils using response surface methodology

Thermodynamics, kinetics, and isotherms for phenol removal from wastewater using red mud

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A study of Cr(VI) and NH4+adsorption using greensand (glauconite) as a low‐cost adsorbent from aqueous solutions

Cited by 53 publications

References 56 publications

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Adsorptive performance of a mixture of three nonliving algae classes for nickel remediation in synthesized wastewater

Evaluation of factors affecting tetracycline and diclofenac adsorption by agricultural soils using response surface methodology

Thermodynamics, kinetics, and isotherms for phenol removal from wastewater using red mud

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A study of Cr(VI) and NH⁴⁺adsorption using greensand (glauconite) as a low‐cost adsorbent from aqueous solutions