Novel bentonite/zeolite-NaP composite efficiently removes methylene blue and Congo red dyes

Abukhadra, Mostafa R.; Abukhadra, Mostafa R.; Shahien, Mohamed G.; Ibrahim, Suzan S.

doi:10.1007/s10311-017-0658-7

Cited by 124 publications

(60 citation statements)

References 16 publications

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“…However, the high cost of activated carbon restricts its widespread utilization. On the contrary, low-cost adsorbents including acid treated red mud (Toor et al, 2015), sand (Li P. et al, 2018), raw pine and acid treated pine (Schorr et al, 2018), Ashoka leaf (Shivaprakash et al, 2018), sulphuric acid treated Palm flower (Magdalena et al, 2018), hen feathers (Tesfaye et al, 2018), and clay minerals (Shaban et al, 2018) have been investigated for the treatment of dyes containing wastewater.…”

Section: Introductionmentioning

confidence: 99%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

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Raw bentonite (RB) was chemically modified by citric acid (CA) to obtain a low-cost and environment-friendly citric acid incorporated bentonite (CAB) adsorbent, which was applied for the adsorptive removal of Congo Red (CR). The effect of adsorbent dosage, contact time, ionic strength, surfactant, and pH on adsorption was investigated. Adsorption equilibrium data fitted well with Langmuir model while the Langmuir adsorption capacity of CR on CAB reached up to 384 mg•g −1. Furthermore, CR adsorption on CAB followed pseudo-second kinetic model while intra-particle diffusion was not the only rate-limiting step as determined from intra-particle diffusion model investigation. RB and CAB were characterized by XRD, FT-IR, and BET techniques. A proposed mechanism for the adsorption of CR over CAB suggested the chemical adsorption phenomenon is mainly controlled by chelation, hydrogen bonding, and fixing.

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Section: Introductionmentioning

confidence: 99%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

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“…Dyes are toxic and nondegradable pollutants and their presence in natural water impedes the light penetration which upset the photosynthesis of aquatic plants (Sun et al 2013). Also, dyes can & Mostafa R. Abukhadra Abukhadra89@Science.bsu.edu.eg degrade the water quality and cause allergy, dermatitis, cancer, skin irritation, dysfunction of kidneys, liver and reproductive system in humans (Shaban et al 2017b;Gupta et al 2006). Several techniques have been investigated for dye removal from water.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation and photo-Fenton oxidation of Congo red dye pollutants in water using natural chromite—response surface optimization

Abukhadra

Ibrahim

et al. 2017

Appl Water Sci

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Refined natural Fe-chromite was characterized by XRD, FT-IR, reflected polarized microscope, XRF and UV spectrophotometer. Photocatalytic degradation and photo-Fenton oxidation of Congo red dye by Fe-chromite was investigated using 1 mL H 2 O 2 . The degradation of dye was studied as a function of illumination time, chromite mass, initial dye concentration, and pH. Fe-chromite acts as binary oxide system from chromium oxide and ferrous oxide. Thus, it exhibits photocatalytic properties under UV illumination and photo-Fenton oxidation after addition of H 2 O 2 . The degradation in the presence of H 2 O 2 reached the equilibrium stage after 8 h (59.4%) but in the absence of H 2 O 2 continued to 12 h (54.6%). Photocatalytic degradation results fitted well with zero, first order and second order kinetic model but it represented by second order rather than by the other models. While the photo-Fenton oxidation show medium fitting with the second order kinetic model only. The values of kinetic rate constants for the photo-Fenton oxidation were greater than those for the photocatalytic degradation. Thus, degradation of Congo red dye using chromite as catalyst is more efficient by photo-Fenton oxidation. Based on the response surface analysis, the predicted optimal conditions for maximum removal of Congo red dye by photocatalytic degradation (100%) were 12 mg/l, 0.14 g, 3, and 11 h for dye concentration, chromite mass, pH, and illumination time, respectively. Moreover, the optimum condition for photoFenton oxidation of dye (100%) is 13.5 mg/l, 0.10 g, 4, and 10 h, respectively.

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“…As shown in Fig.7., the adsorption capacity increased at higher temperature, implying adsorption was an endothermic process. In order to evaluate the effect of temperature on adsorption process, the thermodynamic parameters were calculated by the Van't Hoff equation [27]. The enthalpy change (ΔH 0 ) and entropy change (ΔS 0 ) can be calculated from the equation: The distribution coefficients (Kd) were derived from Kd=Q/Ce.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Removal of Cationic Dye in Aquatic Medium by Using a New Composite Material

Hasdemir

Şimşek

2018

Cumhuriyet Science Journal

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In this study, a new composite material containing polyacrylamide (PAA) and diatomite (D) was developed and characterized for effective removal of Methylene Blue (MB) dye in aquatic medium. The obtained new composite material, polyacrylamide-diatomite (PAA-D) was characterized by point zero charge (PZC), FTIR analysis. The adsorption properties of new composite material were investigated comprehensively and experimental variables were optimized such as concentration, pH, temperature, time and ionic strength. Experimental data were evaluated by using theoretical adsorption models. The maximum adsorption capacity of material was calculated as 0.019 mol kg −1 by considering Langmuir equation. The constants calculated from Freundlich and DR model were found as 0.075 and 0.034, respectively. Adsorption kinetic was also explained with pseudo second order and intra particular diffusion models. Experimental studies were showed that adsorption was endothermic and occurred spontaneously. New developed material can be used as potential adsorbent in order to removal of methylene blue from various medium such as wastewater.Özet: Bu çalışmada, Poliakrilamid (PAA) ve diatomit (D) içeren yeni bir kompozit materyal sentezlendi ve bir katyonik boya olan metilen mavisinin (MB) sulu ortamdaki gideriminde kullanıldı. Elde edilen yeni kompozit, pliakrilamid-diatomit (PAA-D) sıfır yük noktası (SYN), FTIR analizleriyle karakterize edildi. Yeni kompozit materyalin adsorpsiyon özellikleri kapsamlı olarak ve deneysel değişkenler derişim, pH, sıcaklık, zaman ve iyonik şiddet gibi optimize edilerek araştırılmıştır. Deneysel veriler teorik adsorpsiyon modelleri kullanılarak hesaplandı. Kompozit materyalin adsorpsiyon kapasitesi Langmiur eşitliğinden 0.019 mol kg −1 olarak hesaplandı. Freundlich ve DR modellerinden hesaplanan sabitler 0.075 ve 0.034 olarak bulundu. Adsorpsiyon kinetiği yalanci ikinci derece kinetik ve parçacık içi difüzyon modelleriyle de açıklandı. Deneysel çalışmalar adsorpsiyonun endotermik olduğunu ve kendiliğinden meydana geldiğini gösterdi. Yeni geliştirilen materyal çeşitli ortamlardan atık sular gibi, metilen mavisi katyonik boyasını gidermek için potansiyel bir adsorban olarak kullanılabilir.Anahtar Kelimeler: Metilen mavisi, adsorpsiyon, poliakrilamid, diatomit, kompozit

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Novel bentonite/zeolite-NaP composite efficiently removes methylene blue and Congo red dyes

Cited by 124 publications

References 16 publications

Citric Acid Modified Bentonite for Congo Red Adsorption

Citric Acid Modified Bentonite for Congo Red Adsorption

Photocatalytic degradation and photo-Fenton oxidation of Congo red dye pollutants in water using natural chromite—response surface optimization

Removal of Cationic Dye in Aquatic Medium by Using a New Composite Material

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