Enhanced removal of phosphate and nitrate from aqueous solution using novel modified natural clinoptilolite nanoparticles: process optimization and assessment

Shamshiri, Ali; Alimohammadi, Vahid; Sedighi, Mehdi; Jabbari, Ehsan; Mohammadi, Majid

doi:10.1080/03067319.2020.1807525

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…A batch adsorption experiment of Ag/CaO-AC nanocomposite on phosphate removal by assessing the effects of adsorbent dose (0.05-0.6 g), initial concentration (10-80 mg•L -1 ), contact time (15-105 minutes), and pH (3)(4)(5)(6)(7)(8)(9)(10)(11) were conducted. In addition, the solution's pH level was adjusted using 1 M sodium hydroxide or 1 M hydrochloric acid solution using a digital pH meter (Consort pH meter C6010).…”

Section: Adsorption Measurementsmentioning

confidence: 99%

“…According to World Health Organization (WHO), phosphate concentration in drinking water should not exceed 2 mg•L -1 . In comparison, phosphate concentration should not exceed 5 mg•L -1 for wastewater discharged into the river [3]. According to the United States Environmental Protection Agency (USEPA), phosphate concentration above the limit of 0.025 mg•L -1 can cause the occurrence of harmful algal blooms [4].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Phosphate by Synthesized Silver/Calcium Oxide-Activated Carbon Nanocomposite

Nyakairu¹,

Ntale²,

Usman³

2023

Adv Environ Eng Res

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Developing adsorbents with appreciable morphology will create new approaches for better phosphate adsorption performance. This study aims to investigate the design of an adsorbent by impregnating silver nanoparticles (AgNPs) onto calcium oxide-activated carbon (CaO-AC). The Ag/CaO-AC nanocomposite was used as an adsorbent to remove phosphate. Batch adsorption studies were performed to evaluate the effects of adsorbent dose, initial phosphate concentration, contact time, and pH on removing phosphate from an aqueous solution. The optimized conditions were applied to a real wastewater sample. The optimum condition for phosphate adsorption on Ag/CaO-AC nanocomposite was at an adsorbent dose of 0.02 g, an initial phosphate concentration of 40 mg∙L<sup>-1</sup>, an equilibrium contact time of 45 minutes, and pH 7. Pseudo-second-order proved to be more accurate in representing the data of phosphate adsorption onto Ag/CaO-AC nanocomposite. The adsorption isotherm fitted well on the Langmuir model with a maximum adsorption capacity of 77.4 mg∙g<sup>-1</sup>. From the kinetics and isotherm studies, chemisorption was the primary adsorption mechanism through ion exchange and ligand exchange mechanisms. The results of this study show that Ag/CaO-AC nanocomposite is a promising adsorbent for removing phosphate from wastewater.

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Section: Adsorption Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Phosphate by Synthesized Silver/Calcium Oxide-Activated Carbon Nanocomposite

Nyakairu¹,

Ntale²,

Usman³

2023

Adv Environ Eng Res

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“…The microbial fuel cells (MFC) are an apparatus that converts the chemical energy of biodegradable organic compounds to electricity and hydrogen, which are the clean and renewable types of energy [6,7]. This means that an MFC can utilize the organic compound of waste and produce energy, thus, treating wastewater [8][9][10][11] and producing energy simultaneously [7]. Generally, MFCs consist of two chambers, namely cathode, and anode divided by a separator or proton exchange membrane (PEM) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube/Pt Cathode Nanocomposite Electrode in Microbial Fuel Cells for Wastewater Treatment and Bioenergy Production

2021

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In this paper, we reported the fabrication, characterization, and application of carbon nanotube (CNT)-platinum nanocomposite as a novel generation of cathode catalyst in microbial fuel cells (MFCs) for sustainable energy production and wastewater treatment. The efficiency of the carbon nanocomposites was compared by platinum (Pt), which is the most effective and common cathode catalyst. This nanocomposite is utilized to benefit from the catalytic properties of CNTs and reduce the amount of required Pt, as it is an expensive catalyst. The CNT/Pt nanocomposites were synthesized via a chemical reduction technique and the electrodes were characterized by field emission scanning electron microscopy, electronic dispersive X-Ray analysis, and transmission electron microscopy. The nanocomposites were applied as cathode catalysts in the MFC to obtain polarization curve and coulombic efficiency (CE) results. The catalytic properties of electrodes were tested by linear sweep voltammetry. The CNT/Pt at the concentration of 0.3 mg/cm2 had the highest performance in terms of CE (47.16%), internal resistance (551 Ω), COD removal (88.9%), and power generation (143 mW/m2). In contrast, for the electrode with 0.5 mg/L of Pt catalyst, CE, internal resistance, COD removal, and power generation were 19%, 810 Ω, 96%, and 84.1 mW/m2, respectively. So, it has been found that carbon nanocomposite cathode electrodes had better performance for sustainable clean energy production and COD removal by MFC.

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“…Increasing global development growth has made environmental pollution a major problem [1]. The contamination of water resources, such as seas, lakes, and rivers, is a crucial and highly considered environmental problem, since water is an important substance for life on earth, and every living creature needs freshwater to survive [2]. This is a destructive hydrological issue since it harms water quality and the ecosystem, imposing a large adverse effect on human health.…”

Section: Introductionmentioning

confidence: 99%

Stormwater Runoff Treatment Using Pervious Concrete Modified with Various Nanomaterials: A Comprehensive Review

et al. 2021

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Clean water is a vital need for all living creatures during their lifespan. However, contaminated stormwater is a major issue around the globe. A wide range of contaminants, including heavy metals, organic and inorganic impurities, has been discovered in stormwater. Some commonly utilized methods, such as biological, physical and chemical procedures, have been considered to overcome these issues. However, these current approaches result in moderate to low contaminant removal efficiencies for certain classes of contaminants. Of late, filtration and adsorption processes have become more featured in permeable concretes (PCs) for the treatment of stormwater. As nanoparticles have vast potential and unique characterizations, such as a higher surface area to cure polluted stormwater, employing them to improve permeable concretes’ capabilities in stormwater treatment systems is an effective way to increase filtration and adsorption mechanisms. The present study reviews the removal rate of different stormwater contaminants such as heavy metals, organic and other pollutants using nanoparticle-improved PC. The application of different kinds of nanomaterials in PC as porous media to investigate their influences on the properties of PC, including the permeability rate, compressive strength, adsorption capacity and mix design of such concrete, was also studied. The findings of this review show that different types of nanomaterials improve the removal efficiency, compressive strength and adsorption capacity and decrease the infiltration rate of PC during the stormwater treatment process. With regard to the lack of comprehensive investigation concerning the use of nanomaterials in PC to treat polluted stormwater runoff, this study reviews 242 published articles on the removal rate of different stormwater contaminants by using PC improved with nanoparticles.

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Enhanced removal of phosphate and nitrate from aqueous solution using novel modified natural clinoptilolite nanoparticles: process optimization and assessment

Cited by 12 publications

References 54 publications

Adsorption of Phosphate by Synthesized Silver/Calcium Oxide-Activated Carbon Nanocomposite

Adsorption of Phosphate by Synthesized Silver/Calcium Oxide-Activated Carbon Nanocomposite

Carbon Nanotube/Pt Cathode Nanocomposite Electrode in Microbial Fuel Cells for Wastewater Treatment and Bioenergy Production

Stormwater Runoff Treatment Using Pervious Concrete Modified with Various Nanomaterials: A Comprehensive Review

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