Sodium bentonite and kaolin clays: Comparative study on their FT-IR, XRF, and XRD

Kumar, Awinash; Lingfa, Pradip

doi:10.1016/j.matpr.2019.10.037

Cited by 109 publications

(59 citation statements)

References 10 publications

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“…As shown in Figure 7(c), the FT-IR spectrums of flocs displayed characteristic peaks at 3,356 cm À1 attributing to -OH stretching caused by inner surface -OH in-phase and interlayer water -OH. The peaks at 1,100 cm À1 and 500 cm À1 are due to Si-O and Al-OH, the area around 800 cm À1 is due to Si-O-Si intertetrahedral bridging bonds in SiO 2 (Kumar & Lingfa 2020). In FT-IR of flocs, no new peaks appeared in addition to the original peaks of kaolin, Msp and MeMsp-24, which indicated that the flocculation was not caused by chemical reaction between kaolin and flocculants.…”

Section: Flocculation Mechanismmentioning

confidence: 85%

Methylated mud snail protein as a bio-flocculant for high turbidity wastewater treatment

Mao

Zhang

et al. 2021

Water Science and Technology

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The authors reported a potential candidate methylated mud snail protein (MeMsp) as an effective and eco-friendly flocculant to treat the high turbidity wastewater. MeMsp was obtained by extraction of mud snail protein (Msp) through isoelectric precipitation (PSC-IP) and then methylated via the esterification with side-chain carboxyl. Structural characterization of FT-IR, Zeta potential and elemental analysis were carried out and further confirmed the successful of the methylation Flocculation experiments with kaolin suspension simulated wastewater indicated that MeMsp-24 displayed more excellent flocculation efficiency at a low dosage. At the optimum dosage 27 mg/L, the maximum clarification efficiency of MeMsp-24 was 97.46% under pH 7.0. Furthermore, MeMsp-24 exhibited a wide flocculation window in the pH range of 1.0–9.0, and faster sedimentation velocity and larger flocs size. Meanwhile, MeMsp-24 exhibited 92.12% clarification efficiency in treating railway tunnel construction effluent. The flocculation kinetic and mechanism analysis revealed that the most effective particle collision occurred at the optimal dosage, with charge neutralization and adhesion played irreplaceable roles in different environment, respectively. Therefore, through the extraction and methylation modification, the MeMsp could be a promising eco-friendly flocculant for high turbidity wastewater treatment.

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Section: Flocculation Mechanismmentioning

confidence: 85%

Methylated mud snail protein as a bio-flocculant for high turbidity wastewater treatment

Mao

Zhang

et al. 2021

Water Science and Technology

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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%

“…In batch adsorption experiments, the optimal pH was obtained by evaluating the adsorption process at different pH (3)(4)(5)(6)(7)(8)(9)(10)(11). Further, CA-Al-KABs of different dosage (0.02, 0.04.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…Kaolin is mainly composed of kaolinite with the chemical formula of Al 2 Si 2 O 5 (OH) 4 [4] . The kaolinite was reported to be 1:1 type layer silicate with the structure of a tetrahedral sheet of silica (SiO 2 ) linked with an oxygen atom and octahedral sheet of alumina (Al 2 O 3 ) [5]. Kaolin's molecular was estimated weight to be 258.071 gm/mol.…”

Section: Introductionmentioning

confidence: 99%

“…Kaolin's molecular was estimated weight to be 258.071 gm/mol. The cation exchange capacity of kaolin (the soil's ability to hold cations by electrical attraction) was measured to be 1-10 meq/100 g with the surface area of 7-30 m 2 /g [5]. In this way, much effort has been put towards the modification of Kaolin clay for enhancing its adsorption ability.…”

Section: Introductionmentioning

confidence: 99%

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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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Heterogeneous Catalyst for Pyrolysis and Biodiesel Production

Anantharaman

Niju

2021

Liquid Biofuels

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Sodium bentonite and kaolin clays: Comparative study on their FT-IR, XRF, and XRD

Cited by 109 publications

References 10 publications

Methylated mud snail protein as a bio-flocculant for high turbidity wastewater treatment

Methylated mud snail protein as a bio-flocculant for high turbidity wastewater treatment

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

Heterogeneous Catalyst for Pyrolysis and Biodiesel Production

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