Kinetic analysis for the removal of a reactive dye from aqueous solution onto hydrotalcite by adsorption

Lazaridis, Nikolaos K.; Karapantsios, Thodoris D.; Georgantas, D.A.

doi:10.1016/s0043-1354(03)00121-0

Cited by 174 publications

(104 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 In general, the concentration of dyes present in textile wastewater is in the range of 10−50 mg L −1 , and above the concentration of 1 mg L −1 , the dye is visible in the wastewater. 5 Such dyes can pollute bodies of water and have a profound impact by changing the biological cycles and affecting photosynthesis processes. Furthermore, they can possibly threaten human health because prolonged contact with these products can lead to toxic reactions.…”

Section: ■ Introductionmentioning

confidence: 99%

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

Keskin

Çelebioğlu²,

Uyar³

et al. 2015

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In this study, we have developed microalgae immobilized by polysulfone nanofibrous web (microalgae/PSU-NFW) for the removal of reactive dyes (Remazol Black 5 (RB5) and Reactive Blue 221 (RB221). Here, an electrospinning technique was used to produce polysulfone nanofibrous web (PSU-NFW) as a free-standing material on which microalgae Chlamydomona reinhardtii was immobilized on PSU-NFW. The decolorization capacities of microalgae/PSU-NFW were significantly higher than that of pristine PSU-NFW. The decolorization rate for RB5 was calculated as 72.97 ± 0.3% for microalgae/PSU-NFW, whereas it was 12.36 ± 0.3% for the pristine PSU-NFW. In the case of RB221 solution, decolorization rates were achieved as 30.2 ± 0.23 and 5.51 ± 0.4% for microalgae/PSU-NFW and pristine PSU-NFW, respectively. Reusability tests revealed that microalgae/PSU-NFW can be used in at least three successive decolorization steps in which the decolorization rate of the RB5 was found to be 51 ± 0.69% after the third reuse step. These results are promising and therefore suggest that microalgae/PSU-NFW could be applicable for the decolorization of dyes because of their versatility and reusability.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

Keskin

Çelebioğlu²,

Uyar³

et al. 2015

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Most of them are synthetic aromatic benzenoid compounds with potential toxic, mutagenic and carcinogenic properties, endangering human health and environment [1]. Generally, they are difficult to treat by conventional water treatment as they are structurally stable to biodegradation [2,3].The most efficient colour removal from aqueous solution has been attributed to adsorption, which largely employs activated carbon (AC) as adsorbent. Since AC is commercially costly for large scale production and difficult to regenerate, alternative adsorbents are being sought.…”

Section: Introductionmentioning

confidence: 99%

“…Since AC is commercially costly for large scale production and difficult to regenerate, alternative adsorbents are being sought. A positively charged anionic clay known as layered double hydroxide (LDH), with an empirical formula [M Calcination of LDHs at temperature 400 -700 °C can decompose LDH containing carbonate or nitrate to release CO 2 or NO x gas with end products containing a solid mixture of Mg-Al oxide, which can revert to the original structure (reconstruction) of LDH upon rehydration [1,6]. This phenomenon, well known as 'memory effect' was responsible for enhanced uptake of anionic dye removal by CLDH in comparison to its precursor LDH.…”

Section: Introductionmentioning

confidence: 99%

“…3+ and interlayer anion, A n-= NO 3 − was conducted by coprecipitation procedure followed by hydrothermal treatment as outlined by several authors [10 -12], with slight modification. A solution of Mg(NO 3 ) 2 .6H 2 O and Al(NO 3 ) 3 .9H 2 O with molar ratio of Mg/Al:4/1 were allowed to mix with 1M NaOH by drop wise addition of NaOH at a rate of 1 mL/min, stirring the mixture all the time using a magnetic stirrer, while keeping N 2 gas bubbling in the solution mixture throughout the coprecipitation process. This was to minimize the inclusion of CO 2 in the solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

ADSORPTION OF ANIONIC DYES FROM AQUEOUS SOLUTIONS BY CALCINED AND UNCALCINED Mg/Al LAYERED DOUBLE HYDROXIDE

Sumari

Hamzah

Kantasamy

2016

MJAS

View full text Add to dashboard Cite

The uptake of Acid Blue 29 (AB29), Reactive Orange 16 (RO16) and Reactive Red 120 (RR120) from aqueous solutions by calcined (CLDH) and uncalcined Mg/Al layered double hydroxide (LDH) has been investigated. The adsorption process was conducted in a batch mode at 25 °C. Anionic dye removal was more efficient using the CLDH rather than LDH. The adsorption process by CLDH involved reconstruction and hydration of the calcined LDH and intercalation of AB29, RO16 and RR120. Physical characterization using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) were used to ascertain the 'memory effect' phenomenon that is structural reconstruction to regain its original LDH after rehydration. To gain insight into the mechanism of adsorption by CLDH, the pseudo-first order (PFO) and pseudo-second order (PSO) and intraparticle diffusion (IPD) kinetic models were used to analyse experimental data. Based on the correlation coefficient (R 2 ), the PSO has better fitting (R 2 = 0.987 -1.00) compared to PFO (R 2 = 0.867 -0.990). Furthermore the values of maximum adsorption capacity, (q e ) calculated from PSO model are consistent with the experimental q e indicating that the experimental kinetic data for AB29, RO16 and RR120 adsorption by CLDH are suitable for this model. Recycling of the adsorbent, in cycles of calcination-reconstruction process promised a possibility of regeneration of CLDH.Keywords: calcined, adsorption capacity, reconstruction, memory effect, regeneration Abstrak Penyingkiran pewarna Acid Blue 29 (AB29), Reactive Orange 16 (RO16) dan Reactive Red 120 (RR120) daripada larutan akues menggunakan Mg/Al dwi-hidroksida berlapis berkalsin (CLDH) dan tanpa kalsin (LDH) telah dilakukan menggunakan kaedah berkelompok pada suhu 25 °C. Penjerapan bahan pewarna menggunakan CLDH didapati lebih berkesan berbanding LDH. Penjerapan bahan pewarna oleh CLDH berlaku melibatkan proses penghidratan dan penstrukturan semula CLDH dan juga apitan AB29, RO16 dan RR120. Pencirian fizikal pada bahan penjerap yang diperolehi dengan menggunakan kaedah Pembelauan Sinar-X (XRD), Mikroskopi Imbasan Elektron (SEM) dan Spektroskopi Inframerah Transformasi Fourier (FTIR) telah digunakan untuk mengenalpasti fenomena 'kesan memori', iaitu proses penstrukturan semula kepada LDH selepas berlaku penghidratan. Cerapan lebih lanjut mengenai mekanisme proses penjerapan ini, model-model kinetik pseudo tertib pertama (PFO), pseudo tertib kedua (PSO) dan resapan intrapartikel (IPD) telah digunakan untuk menganalisis data ujian. Berdasarkan nilai pekali korelasi (R 2 ), model PSO didapati lebih sesuai (R 2 = 0.99 -1.00) berbanding PFO (R 2 = 0.85 -0.99). Fakta ini diperkukuhkan lagi dengan nilai kapasiti penjerapan maksimum, (q e ) hasil pengiraan menggunakan PSO yang didapati konsisten dengan q e ujian (q e, expt .) untuk AB29, RO16 dan RR120. Kitaran semula bahan penjerap melalui beberapa siri kitaran pengkalsinan-penstrukturan semula juga didapati dapat menjanjikan penjanaan semula CLDH.

show abstract

“…Various methods of dye removal including aerobic and anaerobic microbial degradation, coagulation, chemical oxidation, membrane separation, electrochemical treatment, filtration, flotation, hydrogen peroxide catalysis, and reverse osmosis have been proposed from time to time. Municipal aerobic treatment systems were found to be ineffective in the removal of dyes because dye molecules are resistant to biodegradation (Lazaridis et al, 2003;Moussavi et al, 2011). Different chemical advanced oxidation processes have been shown to be efficient for the degradation of several classes of dyes but they are expensive and economically non-attractive.…”

Section: Introductionmentioning

confidence: 99%

Chemical and physical preparation of activated carbon using Raw bagasse for cationic dye adsorption

2016

Global NEST Journal

View full text Add to dashboard Cite

Agriculture wastes like sugarcane bagasse are available in large quantities in Egypt. Various adsorbents from natural materials, industrial waste materials, agricultural by-products, and biomass based activated carbon can be used in the removal of various dyes. Raw Bagasse pith (RBP) was used to prepare activated carbon (AC) using phosphoric acid (H3PO4) as a chemical activating agent. C The raw BP and the synthesized adsorbent were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM). The effectiveness of AC prepared in adsorption of methylene blue (MB) has been studied as a function of adsorbent type, initial dye concentration and contact time. The effects of the initial dye concentration and contact time were evaluated. Adsorption isotherm models -Langmuir, Freundlich and Temkin were used to simulate the equilibrium data. Langmuir equation was found to have the highest value of R 2 compared with other models. Furthermore, it was found that sugarcane bagasse have a high adsorptive capacity towards MB.

show abstract

Kinetic analysis for the removal of a reactive dye from aqueous solution onto hydrotalcite by adsorption

Cited by 174 publications

References 22 publications

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

ADSORPTION OF ANIONIC DYES FROM AQUEOUS SOLUTIONS BY CALCINED AND UNCALCINED Mg/Al LAYERED DOUBLE HYDROXIDE

Chemical and physical preparation of activated carbon using Raw bagasse for cationic dye adsorption

Contact Info

Product

Resources

About