Physico-chemical variation in bentonite by sulfuric acid activation

Salem, Amin; Karimi, Leila

doi:10.1007/s11814-009-0162-2

Cited by 22 publications

(13 citation statements)

References 8 publications

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“…Similar results were obtained by other workers (Yıldız & Ç alımlı, 2002;Ö nal et al, 2002;Venaruzzo et al, 2002;Rodrigues, 2003;Wu et al, 2006;Vuković et al, 2006;Ö nal & Sarıkaya, 2007;Huaypar et al, 2007;Salem & Karimi, 2009). Turabik & Kumbur (2002) characterized the H 2 SO 4 acid-activation products of bentonite from Ü nye (Turkey) and showed that the intensity of the characteristic peak of montmorillonite for bentonite samples decreased.…”

Section: X-ray Diffractionsupporting

confidence: 82%

SO₂adsorption on acid-treated bentonites from Turkey

Sakizci¹,

Alver²,

Yörükoğullari³

2011

Clay miner.

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The adsorption of sulphur dioxide (SO2) on two bentonites from Unye, Turkey (Kavaktepe and Yemişlitepe deposits – denoted below as BK and BY) and on forms treated with 1 and 2 M HCl solutions was investigated. The bentonite samples were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), thermogravimetry (TG-DTG), differential thermal analysis (DTA) and nitrogen adsorption methods. Adsorption capacities of SO2 were obtained using a standard volumetric apparatus at 293 K and 106 kPa. The SO2 adsorption capacity of the BY-2 (1.263 mmol g–1) sample was much greater than the BK-2 (1.126 mmol g–1) sample. As the concentration of acid increased, the specific surface areas and the uptakes of SO2 gas increased.

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Section: X-ray Diffractionsupporting

confidence: 82%

SO₂adsorption on acid-treated bentonites from Turkey

Sakizci¹,

Alver²,

Yörükoğullari³

2011

Clay miner.

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“…After acid treatment, a significant difference is not observed between original and activated KT2 and DD3. Under these mild conditions, the FTIR curves showed that a weak destruction of the layers and interlayer space of activated clay was carried [13].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of tannery anionic dyes by modified kaolin from aqueous solution

Zen

Berrichi

2016

Desalination and Water Treatment

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There are significant amounts of unused dyes remaining in wastewater from dyeing industry. The release of these effluents causes abnormal coloration of surface waters and there is a risk of toxicity. This research involved the efficient adsorption of anionic dyes (Coriacide Bordeaux 3B, Derma Blue R67, and Coriacide Brown 3J) used in tanning industry by local natural and treated clays; DD3 and KT2, a low-cost material abundant in highly weathered soils from Algerian East. The activated kaolins were characterized by chemical analyses, X-ray diffraction, and fourier transform IR scanning electron microscopy to obtain information about their structure and surface texture. The adsorption kinetics was investigated using the parameters such as contact time, clay nature, solution initial dye concentration, and acid activation. The adsorption capacity of all three dyes on local kaolinite clays exceeds 90% observed after 40-80 min. Compared with the adsorption experiments on Bentonite, the results show that kaolin has the best adsorption capacity for anionic dyes under the experimental conditions of this work.

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“…The mycotoxin binder used in this study was a combination of acid-activated bentonite, clinoptilolite, yeast cell walls and organic acids and salt. Acid-activated bentonite increases the adsorption capacity by using a specific acid activation process to increase the surface area and to enlarge pores [ 27 , 28 ]. Clinoptilolite, with a honeycomb like structure, serves to bind a broad range of mycotoxins [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Mycotoxin binder improves growth rate in piglets associated with reduction of toll-like receptor-4 and increase of tight junction protein gene expression in gut mucosa

Jin

Wang

Degroote

et al. 2017

J Animal Sci Biotechnol

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BackgroundDeoxynivalenol (DON) is a mycotoxin produced by Fusarium species in the field, commonly found in cereal grains, which negatively affects performances and health of animals. Mycotoxin binders are supposed to reduce the toxicity of mycotoxins.MethodThe effect of a mycotoxin binder (containing acid-activated bentonite, clinoptilolite, yeast cell walls and organic acids) on growth performance and gut health was studied. Hundred and twenty weaning piglets were allocated to 4 treatments, with 5 pens of 6 piglets each, arranged in a 2 × 2 factorial design: control diet; control diet with 1 kg/t binder; control diet with DON; and control diet with DON and 1 kg/t binder. From d0–14, the diet of DON-challenged groups was artificially contaminated with a mixture of DON (2.6 mg/kg), 3-acetyl-deoxynivalenol (0.1 mg/kg) and 15-acetyl-deoxynivalenol (0.3 mg/kg), after which the total contamination level was reduced to 1 mg/kg, until d37. On d14, one pig from each pen was euthanized and distal small intestinal mucosa samples were collected for the assessment of intestinal permeability, and gene expression of tight junction proteins, toll-like receptor 4, inflammatory cytokines and intestinal alkaline phosphatase.ResultsAfter 37 d, there were no differences in growth performance between control and DON-challenged groups (P > 0.05). Nevertheless, groups that received diets with binder had a significantly higher average daily gain (ADG) and average daily feed intake (ADFI) for the first 14 d as well as for the whole period, compared to groups without binder (P ≤ 0.05). Groups with binder in the diet also exhibited lower expression of toll-like receptor 4 in distal small intestinal mucosa at d14, compared to groups without binder (P ≤ 0.05). Interestingly, comparing the two DON treatments, piglets fed DON and binder had significantly higher ADFI and ADG compared to those with only DON for the first 14-d (P ≤ 0.05). Addition of binder to DON contaminated diets, also down-regulated the gene expression of toll-like receptor 4 (P ≤ 0.05) and increased mRNA level zona occludens 1 (P ≤ 0.10) as compared to DON.ConclusionsThe present data provide evidence that the binder improves growth rate in piglets associated with reduction of toll-like receptor-4 and increase of tight junction protein gene expression. However, the current study does not allow to assess whether the effects of the binder are mediated by alterations in the toxicokinetics of the mycotoxin.

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Physico-chemical variation in bentonite by sulfuric acid activation

Cited by 22 publications

References 8 publications

SO₂adsorption on acid-treated bentonites from Turkey

SO₂adsorption on acid-treated bentonites from Turkey

Adsorption of tannery anionic dyes by modified kaolin from aqueous solution

Mycotoxin binder improves growth rate in piglets associated with reduction of toll-like receptor-4 and increase of tight junction protein gene expression in gut mucosa

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Physico-chemical variation in bentonite by sulfuric acid activation

Cited by 22 publications

References 8 publications

SO2adsorption on acid-treated bentonites from Turkey

SO2adsorption on acid-treated bentonites from Turkey

Adsorption of tannery anionic dyes by modified kaolin from aqueous solution

Mycotoxin binder improves growth rate in piglets associated with reduction of toll-like receptor-4 and increase of tight junction protein gene expression in gut mucosa

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SO₂adsorption on acid-treated bentonites from Turkey

SO₂adsorption on acid-treated bentonites from Turkey