A facile approach for grafting ion imprinted polymer onto magnetic multi-walled carbon nanotubes for selective removal and preconcentration of cadmium in food and wastewater samples prior to atomic spectrometric determination

Islam, Aminul; Rais, Saman

doi:10.1016/j.foodchem.2022.134751

Cited by 18 publications

(8 citation statements)

References 35 publications

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“…The point zero charge (Figure S13) was calculated as 3. When the pH exceeds pHpzc, the surface becomes negatively charged [8] . Thus, the surface of IIP is negatively charged at the optimized pH (3.6), and it interacts electrostatically with Ni(II).…”

Section: Resultsmentioning

confidence: 99%

“…When the pH exceeds pHpzc, the surface becomes negatively charged. [8] Thus, the surface of IIP is negatively charged at the optimized pH (3.6), and it interacts electrostatically with Ni(II). Furthermore, at pH of 3.6, the adsorption capacity is maximized.…”

Section: Optimization Of the Adsorption Processmentioning

confidence: 99%

“…In Response surface methodology, Central composite design (CCD) was utilized for the optimization of influential parameters. CCD is one of the widely used second‐order design experiments because it is efficient, easy to arrange and interpret [8] . An artificial neural network (ANN) model was developed on the CCD data to compare the models′ predictive abilities [9] .…”

Section: Introductionmentioning

confidence: 99%

“…CCD is one of the widely used secondorder design experiments because it is efficient, easy to arrange and interpret. [8] An artificial neural network (ANN) model was developed on the CCD data to compare the models' predictive abilities. [9] With the aid of the synthesized IIP, the present study aims to devise a kinetically faster, simple, and efficient method for simultaneous extraction and determination of trace Ni(II) concentration from complex sample matrices prior to FAAS determination.…”

Section: Introductionmentioning

confidence: 99%

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Silica Grafted Imprinted Mesoporous Polymer for the Development of SPE Coupled FAAS Method of Nickel Determination, Removal, and Spent Polymer for Reduction of Permanganate: Multivariate Optimization

Rais,

Islam

2024

ChemistrySelect

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A novel silica fabricated allyloxy ethanol based imprinted polymer is synthesised with surface area of 333 m2 g−1 and average pore size of 6.5 nm by an environment friendly one pot surface imprinting process. It was employed for the selective solid‐phase extraction (SPE) of trace Ni(II) in real samples prior to FAAS determination. The factor settings produced via central composite design in response surface methodology (RSM) (pH: 3.6; initial concentration; 800 mg L−1 and time; 15 minute) provide adsorption capacity of 176 mg g−1. Artificial neural network model employed on the RSM data, provided better predictability. Sips isotherm model and BSf kinetic model describes best the sorption phenomena of the homogenous binding terrain. The developed SPE‐coupled FAAS method demonstrate a detection limit of 1.62 μg L−1, quantification limit of 4.17 μg L−1, and Linear dynamic range of 20–8000 μg L−1. It was successfully applied to determine nickel in food (Spinach, Radish, Green tea infusion, Black tea infusion, Coffee, Soya milk, Chocolate Soya milk, Tobacco) and wastewater samples (>99 % removal). For five replicate determinations, the method‘s relative standard deviation was 2.3 %. The method was validated by analysing two certified reference materials, and the outcomes were well‐congruent with standard values. For the synthesised polymer Ni(II) exhibits higher distribution ratio than other competing ions (Cu(II), Pb(II), Cd(II), and Zn(II)) with the imprinting factor; β values of 5.73, 4.98, 6.80, and 5.04 respectively. The reusability experiments revealed that APS@Ni‐IIP retains a strong adsorption efficacy even after 15 cycles and after its exhaustion it was employed as catalyst for reducing permanganate ions, further reducing pollution. The rigid structure of mesoporous silica contributes to its acid resilience and reusability, which can lead to a relative increase in polymer performance in absorption rate and selectivity. Apart from the novelty in the synthesis, thorough examination of the method and material selectivity (in binary, ternary and multielement system), multi fold applications of determination, removal of Ni(II) and reduction of permanganate ions, makes APS@Ni‐IIP a promising candidate for environmental remediation.

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Section: Resultsmentioning

confidence: 99%

Section: Optimization Of the Adsorption Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silica Grafted Imprinted Mesoporous Polymer for the Development of SPE Coupled FAAS Method of Nickel Determination, Removal, and Spent Polymer for Reduction of Permanganate: Multivariate Optimization

Rais,

Islam

2024

ChemistrySelect

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“…Since it is still relatively unexplored, not much research is done on it. 20 Cu(II) and Pb (II) adsorbed DIIP possess net positive surface charge due to the presence of positive charged copper and lead ion. It facilitates the adsorption of anionic dyes over DIIP probably via electrostatic attraction.…”

Section: Alternate Reuse Of Diip For the Adsorptive Removal Of Anioni...mentioning

confidence: 99%

Self‐assembly of thiourea intercalated graphene oxide based dual IIP for the SPE coupled FAAS method development of Cu(II) and Pb(II) determination

Islam,

Rais

2024

J of Applied Polymer Sci

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A new dual‐template surface imprinted polymer for Cu(II) and Pb(II) was synthesized in one pot. Magnetic graphene oxide was self‐assembled with low cost and environmentally benign thiourea. Presence of sulfur and nitrogen donor atoms provide hooks for coordination and partial reduction of graphene oxide matrix. It was used as an solid‐phase extraction adsorbent for extraction, preconcentration, and coupled with flame atomic absorption spectrometry to manifest performance comparable with inductively coupled plasma atomic emission spectrometry (ICPAES) both in terms of quantification limit as well as interference. The critical experimental parameters such as pH; 4.6, contact time of 15 min and initial concentration of 777 (Qe; 227 mg g−1) and 800 μg L−1 (Qe; 273 mg g−1) for Cu(II) and Pb(II), respectively, were optimized using RSM‐CCD and artificial neural network. The adsorption process was kinetically faster (50% adsorption in 5 min), following fractal‐like‐pseudo‐second‐order (FLPSO) kinetics and Brouers–Sotolongo isotherm model owing to the heterogenous energy landscape. The imprinting factors were in the range of 4–7 in the presence of all coexisting ions. The proposed method was robust in the determination and removal of Cu(II) and Pb(II) from food, ground water, and industry effluents with low limit of detection (Cu(II); 1.03 μg L−1 & Pb(II); 1.79 μgL−1). Spiking and recovery tests were used to assess the method's accuracy. Cu(II)/Pb(II) loaded dual template IIP (DIIP) was utilized to remove anionic dyes with >95% efficiency. Thorough examination of the method and material selectivity (in binary, ternary, and multielement system), multi fold applications of determination, removal of Cu(II), Pb(II), and removal of anionic dyes makes DIIP a promising candidate for environmental remediation.

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Facile Synthesis of Carbon Nanotubes and Its Application in Food Science and Wastewater Treatment

Rais,

Mukhtar

2024

Sustainable Materials and Technology

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A facile approach for grafting ion imprinted polymer onto magnetic multi-walled carbon nanotubes for selective removal and preconcentration of cadmium in food and wastewater samples prior to atomic spectrometric determination

Cited by 18 publications

References 35 publications

Silica Grafted Imprinted Mesoporous Polymer for the Development of SPE Coupled FAAS Method of Nickel Determination, Removal, and Spent Polymer for Reduction of Permanganate: Multivariate Optimization

Silica Grafted Imprinted Mesoporous Polymer for the Development of SPE Coupled FAAS Method of Nickel Determination, Removal, and Spent Polymer for Reduction of Permanganate: Multivariate Optimization

Self‐assembly of thiourea intercalated graphene oxide based dual IIP for the SPE coupled FAAS method development of Cu(II) and Pb(II) determination

Facile Synthesis of Carbon Nanotubes and Its Application in Food Science and Wastewater Treatment

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