Removal of anionic and cationic dyes from aqueous solution with activated organo-bentonite/sodium alginate encapsulated beads

Belhouchat, Norel-Houda; Zaghouane-Boudiaf, Hassina; Viseras, César

doi:10.1016/j.clay.2016.08.031

Cited by 206 publications

(87 citation statements)

References 44 publications

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“…The adsorption isotherm describes the interaction between the amount of dye adsorbed ( Q e ) and the adsorbate concentration left in dye solution at equilibrium ( C e ). Several models were investigated to determine adsorption mechanism, surface properties and affinity of the adsorbent for the adsorbate . In this study, six isotherm models were used to determine the most suitable model for design the adsorption process.…”

Section: Methodsmentioning

confidence: 99%

Removal of textile dyes from single and ternary solutions using poly(acrylamide‐co‐N‐methylacrylamide) grafted katira gum hydrogel

Jana

Ray

Bhanja³

et al. 2017

J of Applied Polymer Sci

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A novel hydrogel poly(acrylamide‐co‐poly‐N‐methylacrylamide) grafted katira gum (KG) was synthesized via free radical copolymerization using a mixture of acrylamide and N‐methylacrylamide in presence of N,N′‐methylene‐bis‐acrylamide as a crosslinking agent. A series of hydrogels (KG‐1 to KG‐6) were prepared by varying amount of acrylamide and N‐methylacryamide. Poly‐acrylamide‐g‐katira gum (PAM‐g‐KG) and poly‐N‐methylacrylamide‐g‐katira gum (PNMA‐g‐KG) hydrogels were also prepared using same crosslinking agent. Swelling characteristics of all the prepared hydrogels in water were evaluated and the hydrogel with best swelling property (KG‐6) was identified. The hydrogel KG‐6 was characterized by FTIR, X‐ray diffractometer, and scanning electron microscopy and was used for the adsorption of textile dyes namely methylene blue (MB), malachite green (MG), and congo red (CR) from single and ternary solutions. Adsorption dynamics, kinetics, isotherm, and thermodynamics of all the prepared hydrogels were studied in the ternary dye solutions. The sorption kinetics data were fitted well to pseudo‐second order and the equilibrium adsorption data were found to follow Freundlich isotherm model. The thermodynamics studies showed that the adsorption process was spontaneous and exothermic in nature. The preferential dye adsorption by the hydrogel was followed in the order MB > MG > CR. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45958.

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Section: Methodsmentioning

confidence: 99%

Removal of textile dyes from single and ternary solutions using poly(acrylamide‐co‐N‐methylacrylamide) grafted katira gum hydrogel

Jana

Ray

Bhanja³

et al. 2017

J of Applied Polymer Sci

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“…The influence factors of CA-Al-KABs' adsorption capacity towards CIP were systematically studied through batch adsorption experiments. The factors included the dosage of CA-Al-KABs (0.0 -0.1 g/50 mL), the initial pH of the solution (3)(4)(5)(6)(7)(8)(9)(10)(11), contact time (0-1440 min), temperature (288.15 K -308.15 K), initial concentration of CIP (20-140 mg/L), and different ionic strengths. In addition, the adsorption performance of CA-Al-KABs on different antibiotics was also studied.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…Alginate is a kind of natural polysaccharide, produced by brown algae and bacteria [11]. It is composed of both β-D-mannuronic acid and α-L-guluronic acid, and considered to be efficient in pollutants removal.…”

Section: Introductionmentioning

confidence: 99%

Removal of Ciprofloxacin with Aluminum-Pillared Kaolin Sodium Alginate Beads (CA-Al-KABs): Kinetics, Isotherms, and BBD Model

Pan

Zheng

et al. 2020

Water

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In recent years, the problem of water pollution caused by antibiotics has attracted wide attention. The common use of antibiotics represents a threat to both human health and environmental safety. The modification of kaolin clay is promising due to its high efficiency, easy operation, and low cost. In this study, a novel material, aluminum-pillared kaolin sodium alginate beads (CA-Al-KABs), was synthesized by gelling and solidification processes. The structure and chemical properties were characterized by various analytical methods. The influencing factors (such as adsorbent dosage, contacting time, pH, ion strength, temperature, and initial concentration) and adsorption mechanism of ciprofloxacin (CIP) were studied. Furthermore, adsorption kinetics, adsorption isotherms, and a Box–Behnken design (BBD) model were conducted. Moreover, CA-Al-KABs’ adsorption efficiency towards other antibiotics were also evaluated. The adsorption experiments showed that the acidic environment (pH = 4) was more favorable for the adsorption of ciprofloxacin. The adsorption kinetics of ciprofloxacin by CA-Al-KABs microspheres were confirmed to be more suitable with the pseudo-first-order kinetics model. The Langmuir isotherm model showed that the maximum adsorption capacity of CA-Al-KABs microspheres to ciprofloxacin was 68.36 mg/g at 308.15 K. The adsorption driving force of CIP near CA-Al-KABs may be the electrostatic attraction. Further, CIP could also form complexes with Ca2+ and Al—Al—OH on CA-Al-KABs, and thus CIP was attracted to the adsorbent. Adsorption thermodynamics showed that the adsorption process was exothermic, feasible, and spontaneous. In addition, the adsorption performance on other antibiotics indicated CA-Al-KABs’ broad application in the treatment of antibiotic wastewater.

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“…Their source can be tracked down from textile industries as well as other relevant industries, such as leather, paint, plastics, and so on . The dye residuals in water may cause damage to aquatic biota and human by mutagenic and carcinogenic effects , and even at very low concentrations, dyes may still have toxic effect . Besides, the presence of dyes in water bodies increases chemical oxygen demand and creates hurdle for penetration of light in water bodies affecting photosynthetic activity of aquatic plants .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cationic Grafted‐Microfiltration Membrane of PSF‐g‐QPDMAEMA and Study on its Adsorption and Rejection Performance for Acid Dye

Gao

Men

2020

Polymer Engineering & Sci

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Chloromethylated polysulfone (CMPSF) microfiltration membrane were first prepared by using immersion-precipitation phase transformation method, and then CMPSF membrane was modified into aminated PSF membrane (AMPSF membrane). A surface-initiating system of -NH 2 /S 2 O 8 2− was constituted at the interface between AMPSF membrane and a aqueous solution, in which monomer dimethylaminoethyl methacrylate (DMAEMA) and initiator ammonium persulfate were dissolved. The graft polymerization of DMAEMA was successfully realized on AMPSF membrane, resulting in the grafted membrane PSF-g-PDMAEMA. And then quaternization modification of the grafted membrane PSF-g-PDMAEMA was performed, resulting in the cationic microfiltration membrane of PSF-g-QPDMAEMA. The isothermal adsorption experiments of PSF-g-QPDMAEMA membrane for two acid dyes, reactive brilliant red (RBR), and reactive light yellow (RLY), were carried out, and the permeation experiments were also conducted. The experimental results show that PSF-g-QPDMAEMA membrane has strong adsorption ability for acid dyes by right of the electrostatic interaction between the quaternary ammonium cations on the surface of PSF-g-QPDMAEMA membrane and the sulfonate anions in the molecules of acid dyes as well as by right of cation-π interaction between the quaternary ammonium cations on PSF-g-QPDMAEMA membrane and the aromatic rings in the molecules of acid dyes. PSF-g-QPDMAEMA membrane displays excellent rejection and removing performance for acid dyes in water. POLYM. ENG. SCI., 60:900-908, 2020.

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Removal of anionic and cationic dyes from aqueous solution with activated organo-bentonite/sodium alginate encapsulated beads

Cited by 206 publications

References 44 publications

Removal of textile dyes from single and ternary solutions using poly(acrylamide‐co‐N‐methylacrylamide) grafted katira gum hydrogel

Removal of textile dyes from single and ternary solutions using poly(acrylamide‐co‐N‐methylacrylamide) grafted katira gum hydrogel

Removal of Ciprofloxacin with Aluminum-Pillared Kaolin Sodium Alginate Beads (CA-Al-KABs): Kinetics, Isotherms, and BBD Model

Preparation of Cationic Grafted‐Microfiltration Membrane of PSF‐g‐QPDMAEMA and Study on its Adsorption and Rejection Performance for Acid Dye

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