Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems

Pizarro, Carmen; Rubio, Marı́a A.; Escudey, Mauricio; Albornoz, María F.; Muñoz, Daniela; Denardin, Juliano C.; Fabris, José Domingos

doi:10.5935/0103-5053.20150166

Cited by 10 publications

(11 citation statements)

References 5 publications

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“…This phenomenon was similar to what was described in clay minerals covered with nZVI particles [24,50], associated with limited Fe 3+ adsorption sites that imogolite possessed. IEP values calculated from the EM measurements [21] were 10.1, 6.4, 8.9, and 7.7, respectively, for imogolite, magnetite, Imo-Fe25, and Imo-Fe50 (Fig.…”

Section: Sample Characterizationsupporting

confidence: 84%

Mechanistic insights into simultaneous removal of copper, cadmium and arsenic from water by iron oxide-functionalized magnetic imogolite nanocomposites

Arancibia‐Miranda

Manquián-Cerda

Pizarro

et al. 2020

Journal of Hazardous Materials

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Imogolite and magnetic imogolite-Fe oxide nanocomposites at and 25% Fe loading (w/w), respectively) were synthesized and tested for the removal of aqueous copper (Cu), cadmium (Cd), and arsenic (As) pollutants. The materials were characterized by transmission electron microscopy, and specific surface area and isoelectric point measurements. The Fe-containing samples were additionally characterized by Mössbauer spectroscopy and vibrating-sample magnetometry. Significant differences were found in the morphological, electrophoretic, and magnetic characteristics between imogolite and the nanocomposites. The in-situ Fe-oxide precipitation process modified the active surface sites of the imogolite. The Fe-oxide, mainly magnetite, favored the contaminants' adsorption over the pristine imogolite. The adsorption kinetics of these pollutants were adequately described by the pseudo-second order and intraparticle diffusion models. The kinetic models showed that surface adsorption was more important than intraparticle diffusion in the removal of the pollutants by all the adsorbents. The Langmuir-Freundlich model described the experimental adsorption data, and both nanocomposites showed greater adsorption capacity than the imogolite. The adsorption of Cu and Cd was sensitive to cationic competition, showing a decrease of the adsorption capacity when the two cations coexisted, while their adsorption increased in the presence of arsenate.

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Section: Sample Characterizationsupporting

confidence: 84%

Mechanistic insights into simultaneous removal of copper, cadmium and arsenic from water by iron oxide-functionalized magnetic imogolite nanocomposites

Arancibia‐Miranda

Manquián-Cerda

Pizarro

et al. 2020

Journal of Hazardous Materials

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“…Wastewaters originating from cheese manufacturing industries, such as cheese whey (CW), second cheese whey (SCW), and washing waters, are of high-strength as they contain significant [14] Simulated swine wastewater Chemical modification with NaCl Ammonium 40%-95% [15] Dairy farm wastewater treated in constructed wetlands Natural Phosphorus Ammonium 86%-99% 88%-99% [16] Dairy industry wastewater Organo-zeolites COD Nitrate nitrogen Phosphate 50% 70% 20% [17] Dairy processing waters Natural COD 76% [18] Aqueous solution/carcass leachates Naturaland Mg 2+ modified Ammonium 8.173 mg/g 7.759 mg/g [19] Municipal wastewater Natural Ammonium 5.03 mg/g 75.6% [20] Aqueous solution Modified with fly ash Ammonium 41.73%-45.25% [21] Review of acid mine drainage urban runofflandfill leachate Natural/synthetic Heavy metals Zn (30%-95%)/Cu (33%-100%) Cd (54%-99%)/Cu (31%-90%)/Zn (81.892%)/Ammonium 78% Ammonium (over 50%)/Pb (71%)/Cd (74%) [22] Aqueous solution Natural Ammonium 22.90 mg/g [23] Aqueous solution Modified by microwave and sodium acetate Ammonium 92.90% [24] [25] Municipal wastewater Natural Modified (Z-Fe) Phosphate (single) Ammonium (single) Phosphate (single) Ammonium (single) 0.6 mg/g 33 mg/g 3.4 mg/g 27 mg/g [26] Aqueous solution Natural Modified with potassium permanganate Ammonium 5.85 mg/g 3.68 mg/g [27] Aqueous solution Modified with lanthanum oxide Phosphorus Ammonium 8.96 21.2 mg/g [28] Aqueous solution Natural Ammonium 67.4%-81.1% [29] Simulated reclaimed wastewater Modified with NaCl Ammonia, nitrogen Phosphorus 98.46% 99.8% [30] Aqueous solution Natural Ammonium 75%-95.3% [31] Aqueous solution Natural (eight different types) Ammonium 15.7%-32.4% [32] Municipal wastewater Natural Phosphorus Ammonium 46%-100% 70% [33] Aqueous solution Natural Modified Phosphate 0.28-1.82 mg/g 1.31-1.97 mg/g [34] Aqueous solution Natural Phosphate Up to 26.48 mg/g [35] Aqueous solution Modified with nanosized particles of magnetite Arsenate Up to 5.2 mg/g [36] Post-treated municipal wastewater Natural Ammonium 23 ± 0.8 mg/g [37] Aqueous solution Modified with cetylpyridinium chloride (CPC) Hexavalent chromium 5.8 mg/g [38] Simulated municipal wastewater (vertical flow constructed wetlands) Natural Ammonium >90%…”

Section: Introductionmentioning

confidence: 99%

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Kotoulas

Agathou

Triantaphyllidou

et al. 2019

Water

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The efficiency of natural zeolite to remove ammonium from artificial wastewater (ammonium aqueous solutions) and to treat second cheese whey was examined, aiming to recover nitrogen nutrients that can be used for further applications, such as slow-release fertilizers. Sorption experiments were performed using artificial wastewater and zeolite of different granulometries (i.e., 0.71-1.0, 1.8-2.0, 2.0-2.8, 2.8-4.0, and 4.0-5.0 mm). The granulometry of the zeolite had no significant effect on its ability to absorb ammonium. Nevertheless, smaller particles (0.71-1.0 mm) exhibited quicker NH 4 + -N adsorption rates of up to 93.0% in the first 10 min. Maximum ammonium removal efficiency by the zeolite was achieved at ammonium concentrations ranging from 10 to 80 mg/L. Kinetic experiments revealed that chemisorption is the mechanism behind the adsorption process of ammonium on zeolite, while the Freundlich isotherm model fitted the experimental data well. Column sorption experiments under batch operating mode were performed using artificial wastewater and second cheese whey. Column experiments with artificial wastewater showed high NH 4 + -N removal rates (over 96% in the first 120 min) for all granulometries and initial NH 4 + -N concentrations tested (200 and 5000 mg/L). Column experiments with second cheese whey revealed that natural zeolite can remove significant organic loads (up to 40%, 14.53 mg COD/g of zeolite) and NH 4 + -N (about 99%). For PO 4 3− -P, the zeolite appeared to saturate after day 1 of the experiments at a removal capacity of 0.15 mg P/g of zeolite. Desorption experiments with water resulted in low NH 4 + -N and PO 4 3− -P desorption rates indicating that the zeolite could be used as a substrate for slow nitrogen release in soils.

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“…This is important for synthesizing the composite: SC-581 is a permanent positive charge water-stable polymer (or polycation); thus, formation of the composite between the negatively charged NZ and SC-581 is feasible simply through electrostatic attraction. XRD analysis reveals that NZ corresponds to a rehydrated mordenite-type zeolite that possesses exchangeable calcium in its structure as represented by its general formula, Ca 3.4 Al 7.4 Si 40.6 O 96 (H 2 O) 31 [39]. Finally, approximately 75% of NZ is 20 µm or less in size.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, approximately 75% of NZ is 20 µm or less in size. This property is promising, since particles in this size range present the highest adsorption capacities due to their elevated contact surface [39][40][41]. Collectively, these characteristics make NZ a suitable starting material for further development of composites to be used for adsorption of anionic species such as sulfates.…”

Section: Methodsmentioning

confidence: 99%

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

et al. 2021

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Sulfide mineral mining produces highly sulfate-contaminated wastewater which needs to be treated before disposal. A composite material was made from natural zeolite (NZ) and Superfloc® SC-581, a polyammonium cationic polymer. The resulting modified zeolite (MZ) demonstrated improved capacity for sulfate abatement from wastewater compared to NZ. Above pH 4.0, MZ retained positive surface charge while NZ remained negative. The effect of the ionic strength on the adsorption process was evaluated. Sulfate adsorption capacity was assessed and revealed MZ to be superior to NZ in all cases. Adsorption kinetics reached equilibrium after 10–12 h, with MZ adsorption being twice that of NZ; data fitted a pseudo-second order kinetic model. Adsorption isotherms reflected the high capacity of MZ for sulfate adsorption with maximum of 3.1 mg g−1, while NZ only achieved 1.5 mg g−1. The process corresponds to heterogeneous partially reversible adsorption of ionic species over the solid adsorbent. Langmuir–Freundlich parameters revealed that adsorption over MZ corresponds to an interaction eight times stronger than that on NZ. The sulfate adsorption pattern changes with ionic strength. Taken together, the composite formed between natural zeolite and polyammonium represents an adsorbent that maintains the adsorption capacity of zeolite and proves suitable for anionic species removal. Further prospect considers the testing of the composite with other anionic pollutants (arsenate, phosphate, perchlorate, etc.)

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Nanomagnetite-Zeolite Composites in the Removal of Arsenate from Aqueous Systems

Cited by 10 publications

References 5 publications

Mechanistic insights into simultaneous removal of copper, cadmium and arsenic from water by iron oxide-functionalized magnetic imogolite nanocomposites

Mechanistic insights into simultaneous removal of copper, cadmium and arsenic from water by iron oxide-functionalized magnetic imogolite nanocomposites

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Sulfate Kinetics and Adsorption Studies on a Zeolite/Polyammonium Cation Composite for Environmental Remediation

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