Non-toxic and biodegradable κ-carrageenan/ZnO hydrogel for adsorptive removal of norfloxacin: Optimization using response surface methodology

Sharma, Priya; Sharma, Manish; Laddha, Harshita; Agarwal, Madhu

doi:10.1016/j.ijbiomac.2023.124145

Cited by 30 publications

(27 citation statements)

References 73 publications

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“…The incremental distribution and accumulation of pores helped in the adsorption of BZ on the surface of the hydrogel. 26 To investigate the surface morphology of the PVA/ CS/β-CD hydrogel, field emission scanning electron microscopy (FESEM) was employed, and the images are displayed in Figure S3. The surface of the prepared hydrogel is rough and non-uniform, helping in the removal of BZ by bonding with the functional groups that are present on the surface of the hydrogel to achieve maximum removal efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…The pH PZC was obtained by ploting ΔpH versus the initial pH (pH i ) of the solution, and the point in the graph where pH i = pH f is called the pH PZC of the PVA/CS/β-CD hydrogel. 26 2.4. Adsorption Study.…”

Section: Point Of Zero Charge (Ph Pzc ) Studiesmentioning

confidence: 99%

“…Hydrogels consist of 3D polymeric networks having various functional groups such as -OH, -CONH-, -CONH 2 , and -SO 3 H which adsorb large quantities of water. 26 They are easy to handle, have a simple preparation method, high adsorption capacity, and an easy regeneration method, and are biodegradable, making them ideal candidates for a plethora of applications. Hydrogels are easily synthesized from naturally occurring polysaccharides such as chitosan (CS), 27,28 fenugreek gum, 3 carrageenan, 26 xanthan gum, 29 cellulose, 30 etc.…”

Section: Introductionmentioning

confidence: 99%

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Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Sharma,

Laddha

et al. 2023

ACS Agric. Sci. Technol.

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Indiscriminate use of pesticides to meet the global demand for food has contaminated groundwater and surface water, affecting the global environment. In view of this, it is imperative to find an economical solution to this critical issue. Herein, a novel β-cyclodextrin cross-linked poly(vinyl alcohol)−chitosan (PVA/CS/β-CD) hydrogel is reported for the adsorption of bentazon (BZ) herbicide. The properties of the PVA/CS/β-CD hydrogel, such as its surface morphology, surface area, thermal stability, and the presence of functional groups, have profound effects on the adsorption of BZ on its surface, and hence these have been investigated by FESEM, BET, TGA, and FT-IR analytical techniques. Several influential factors, viz., pH of the solution, temperature, initial concentration of BZ, contact time, and mass of the hydrogel, have been explored by the Box−Behnken design model and systematic batch studies. From the response surface methodology model, 13.45 mg of hydrogel was able to remove 93.71% of BZ from 10 mL of a 10 mg/L solution at pH 7.4 in 120 min, as assessed by systematic batch adsorption studies. The adsorption behavior of BZ on the PVA/CS/β-CD hydrogel was thermodynamically spontaneous and endothermic. The maximum adsorption capacity was 398.40 mg/g, which comes from the Langmuir isotherm and follows pseudo-second-order model. BZ-loaded PVA/CS/ β-CD hydrogel can be recycled using methanol and shows good removal efficiency (>70%) for six consecutive adsorption− desorption cycles. Additionally, the BZ-adsorbed PVA/CS/β-CD hydrogel can be employed as a sustained release vehicle for BZ having long-term weedicide effects at diverse pH values in water.

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Section: Resultsmentioning

confidence: 99%

Section: Point Of Zero Charge (Ph Pzc ) Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Sharma,

Laddha

et al. 2023

ACS Agric. Sci. Technol.

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“…25 Therefore, at neutral pH, electrostatic attraction between TC and Zn−Cu-BDC@CA CBs might also be responsible for adsorption. 72 Therefore, electrostatic interaction and hydrogen bonding are plausible adsorption mechanisms for adsorption of TC on Zn−Cu-BDC@CA CBs. Figure 9b depicts a BET analysis of Zn−Cu-BDC@CA CBs before and after adsorption.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…TC is zwitterionic when the solution pH is between 3.3 and 7.7 . Therefore, at neutral pH, electrostatic attraction between TC and Zn–Cu-BDC@CA CBs might also be responsible for adsorption . Therefore, electrostatic interaction and hydrogen bonding are plausible adsorption mechanisms for adsorption of TC on Zn–Cu-BDC@CA CBs.…”

Section: Resultsmentioning

confidence: 99%

Batch Experimental Studies and Statistical Modeling for the Effective Removal of Tetracycline from Wastewater Using Bimetallic Zn–Cu-Metal–Organic Framework@Hydrogel Composite Beads

Laddha,

Sharma,

Jadhav

et al. 2023

Langmuir

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Metal and Metal Oxides Nanoparticles as Nanofillers for Biodegradable Polymers

Wawrzyńczak,

Chudzińska,

Feliczak‐Guzik

2024

ChemPhysChem

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Polymeric materials, despite their many undeniable advantages, nowadays are a major environmental challenge. Thus, in recent years biodegradable polymer matrices have been widely used in various sectors, including the medicinal, chemical, and packaging industry. Their widespread use is due to the properties of biodegradable polymer matrices, among which are their adjustable physicochemical and mechanical properties, as well as lower environmental impact. The properties of biodegradable polymers can be modified with various types of nanofillers, among which clays, organic and inorganic nanoparticles, and carbon nanostructures are most commonly used. The performance of the final product depends on the size and uniformity of the used nanofillers, as well as on their distribution and dispersion in the polymer matrix. This literature review aims to highlight new research results on advances and improvements in the synthesis, physicochemical properties and applications of biodegradable polymer matrices modified with metal nanoparticles and metal oxides.

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Non-toxic and biodegradable κ-carrageenan/ZnO hydrogel for adsorptive removal of norfloxacin: Optimization using response surface methodology

Cited by 30 publications

References 73 publications

Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Batch Experimental Studies and Statistical Modeling for the Effective Removal of Tetracycline from Wastewater Using Bimetallic Zn–Cu-Metal–Organic Framework@Hydrogel Composite Beads

Metal and Metal Oxides Nanoparticles as Nanofillers for Biodegradable Polymers

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