Optimization of lead removal from aqueous solution using goethite/chitosan nanocomposite by response surface methodology

Rahimi, Safoora; Moattari, Rozita M.; Rajabi, Laleh; Derakhshan, Ali Ashraf

doi:10.1016/j.colsurfa.2015.07.063

Cited by 37 publications

(5 citation statements)

References 31 publications

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“…Note 1-control valves; 2-level controller; 3-level sensors; 4-temperature controller; 5-heating element; 6-temperature sensor; 7-water bath tank; 8-rotating blade; 9-electric motor; 10-variable remote control; 11-DC and AC source; 12-sealed glass for samples in Table 3, were used to determine the significance of each parameter. In general, the more significant parameter has a smaller p value and larger F value in ANOVA (Rahimi et al 2015a). Based on 4) reagent molar ratio (1.51).…”

Section: Analysis Of Variance Resultsmentioning

confidence: 93%

Multi-response optimization of MIL-101 synthesis for selectively adsorbing N-compounds from fuels

Songolzadeh

Soleimani

Ravanchi³

2019

Pet. Sci.

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In this work, MIL-101, a metal organic framework, has been synthesized and examined in the adsorptive denitrogenation process. Due to the importance of adsorption capacity and selectivity, the effects of synthesis parameters including metal type, reagent ratio, time and temperature on the MIL-101 performance were investigated by measuring quinoline (QUI) separation from iso-octane. The optimum conditions were determined using a Taguchi experimental design and the multiresponse optimization (multivariate statistical) method. Based on the arithmetic mean of normalized QUI adsorption capacity and QUI/dibenzothiophene (DBT) selectivity, as the objective function, the optimum value of synthesis parameters were found to be manganese as metal type in the structure, 180 °C for synthesis temperature, 15 h for synthesis time and 1.00 for reagent molar ratio. Under these conditions, QUI adsorption capacity and QUI/DBT selectivity were 19.3 mg-N/g-Ads. and 24.6, respectively. Accordingly, the arithmetic mean between normalized values of these measured parameters was equal to 1.10, which is in good agreement with the predicted value. The MIL-101 produced under optimum conditions was characterized by determining its specific surface area, X-ray powder diffraction patterns and Fourier transform infrared spectroscopy. Finally, isotherm and kinetic studies indicate that the Langmuir isotherm and pseudo-first-order model can successfully describe the experimental data.

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Section: Analysis Of Variance Resultsmentioning

confidence: 93%

Multi-response optimization of MIL-101 synthesis for selectively adsorbing N-compounds from fuels

Songolzadeh

Soleimani

Ravanchi³

2019

Pet. Sci.

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“…Polyethylene glycol/chitosan and polyvinyl alcohol/chitosan composites were shown by Rajeswari et al to remove aqueous nitrate ions with adsorption capacities of 50.68 and 35.03 mg g −1 , respectively [ 174 ]. Borsagli et al used carboxymethyl-chitosan for the adsorption of Cd(II) and Cr(VI) ions [ 175 ], while Rahimi et al used goethite/chitosan nanocomposite for the removal of Pb(II) ions [ 176 ]. Gibbs et al studied the sorption of acid green 25 by chitosan, varying experimental parameters such as pH and the chitosan adsorbent particle size [ 177 ].…”

Section: The Adsorption Of Heavy Metals and Organic Dyesmentioning

confidence: 99%

Nanostructured Materials for Water Purification: Adsorption of Heavy Metal Ions and Organic Dyes

Choi

Lee

2022

Polymers

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Chemical water pollution poses a threat to human beings and ecological systems. The purification of water to remove toxic organic and inorganic pollutants is essential for a safe society and a clean environment. Adsorption-based water treatment is considered one of the most effective and economic technologies designed to remove toxic substances. In this article, we review the recent progress in the field of nanostructured materials used for water purification, particularly those used for the adsorption of heavy metal ions and organic dyes. This review includes a range of nanostructured materials such as metal-based nanoparticles, polymer-based nanomaterials, carbon nanomaterials, bio-mass materials, and other types of nanostructured materials. Finally, the current challenges in the fields of adsorption of toxic materials using nanostructured materials are briefly discussed.

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“…Rajeswari et al (2016) proposed PVA-chitosan and PEG-chitosan composites [131] to remove aqueous nitrate ions. Carboxymethyl chitosan nanocomposites have been studied for the complexation of Cd 2+ /Cr 6+ , whilst goethite/chitosan nanocomposites have been proposed for Pb 2+ complexation [132,133]. Pincus et al (2018) proposed chitosan-based bead photocatalysts obtained by decorating CS beads, crosslinked with copper, with nano-TiO 2 .…”

Section: Chitin and Chitosanmentioning

confidence: 99%

Sustainable Removal of Contaminants by Biopolymers: A Novel Approach for Wastewater Treatment. Current State and Future Perspectives

et al. 2021

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Naturally occurring substances or polymeric biomolecules synthesized by living organisms during their entire life cycle are commonly defined as biopolymers. Different classifications of biopolymers have been proposed, focusing on their monomeric units, thus allowing them to be distinguished into three different classes with a huge diversity of secondary structures. Due to their ability to be easily manipulated and modified, their versatility, and their sustainability, biopolymers have been proposed in different fields of interest, starting from food, pharmaceutical, and biomedical industries, (i.e., as excipients, gelling agents, stabilizers, or thickeners). Furthermore, due to their sustainable and renewable features, their biodegradability, and their non-toxicity, biopolymers have also been proposed in wastewater treatment, in combination with different reinforcing materials (natural fibers, inorganic micro- or nano-sized fillers, antioxidants, and pigments) toward the development of novel composites with improved properties. On the other hand, the improper or illegal emission of untreated industrial, agricultural, and household wastewater containing a variety of organic and inorganic pollutants represents a great risk to aquatic systems, with a negative impact due to their high toxicity. Among the remediation techniques, adsorption is widely used and documented for its efficiency, intrinsic simplicity, and low cost. Biopolymers represent promising and challenging adsorbents for aquatic environments’ decontamination from organic and inorganic pollutants, allowing for protection of the environment and living organisms. This review summarizes the results obtained in recent years from the sustainable removal of contaminants by biopolymers, trying to identify open questions and future perspectives to overcome the present gaps and limitations.

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Optimization of lead removal from aqueous solution using goethite/chitosan nanocomposite by response surface methodology

Cited by 37 publications

References 31 publications

Multi-response optimization of MIL-101 synthesis for selectively adsorbing N-compounds from fuels

Multi-response optimization of MIL-101 synthesis for selectively adsorbing N-compounds from fuels

Nanostructured Materials for Water Purification: Adsorption of Heavy Metal Ions and Organic Dyes

Sustainable Removal of Contaminants by Biopolymers: A Novel Approach for Wastewater Treatment. Current State and Future Perspectives

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