scholarly journals Adsorption of Acid Red 52 Contained in Waste Water by Co-products of the Phosphate Industry: Kinetics and Thermodynamic

2021 ◽  
Author(s):  
Samia Nasr ◽  
samira jeahi ◽  
Mustapha Hidouri ◽  
Khaled BOUGHZALA
Keyword(s):  
Waste Water ◽  
Textile Industry ◽  
Waste Water Treatment ◽  
X Ray Diffraction ◽  
Retention Capacity ◽  
Natural Phosphate ◽  
Removal Capacity ◽  
Phosphate Industry ◽  
Living Things ◽  
Pseudo Second Order

Water is essential for all living things however its pain has become serious. Many industrial activities cause its pollution by the release of polluting byproduct. Waste water treatment is hence necessary. In this context, the waste water of the textile industry containing Red Acid 52 was treated by the solid waste of the washed natural phosphate byproduct. Natural phosphate was also studied. The solid materials were first characterized by chemical analysis, Fourier Transform Infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The phosphate materials were after that, tested in the adsorption of the Red Acid 52. The experimental data indicated that the phosphate waste rock allowed the removal of Red Acid 52. Its maximum retention capacity attained 18.4 mg.g-1. Calcinations of materials inhibits the removal capacity found reduced by 60 to 70%. The adsorption kinetics of the Red Acid 52 on the material is well described by the pseudo second order model while the adsorption isotherms are identified by the Langmuir model. Hereafter, the thermodynamic study revealed that the adsorption process is spontaneous and exothermic. Keywords: Waste water, Phosphate co-product, Adsorption, Red Acid 52.

Elimination of Acid Red 88 by Waste Product from the Phosphate Industry: Batch Design and Regeneration

2021 ◽  
Author(s):  
Khaled Boughzala ◽  
Mustapha Hidouri
Keyword(s):  
Electron Microscopy ◽  
Experimental Data ◽  
Thermal Analysis ◽  
Waste Product ◽  
Langmuir Model ◽  
X Ray Diffraction ◽  
Retention Capacity ◽  
Phosphate Industry ◽  
Pseudo Second Order ◽  
Scanning Electron

Waste regenerated after washing of rock phosphate and phosphogypsum has been proposed as removal agents of Acid Red 88 (AR 88)) from artificially contaminated solution. Natural phosphate (PN) was also studied for comparison. These materials were characterized beforehand, as is intended for the removal tests, by chemical analysis, powder X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetric analysis– differential thermal analysis, scanning electron microscopy, and N2 adsorption isotherms. The conducted experiments show that among the different materials, the PWR has the highest retention capacity of the dye (123.4 mg g−1) of AR-88. Upon calcinations, the removal capacities reduced by 60 to 70%. We take note also that a decrease in the amount of removed AR 88 dye occurs with an increase in pH. The kinetics data on the reaction between AR 88 and the materials are described well by a pseudo -second-order model. The Langmuir model is successfully applied to the experimental data of the removal of acid red 88. The removal process is exothermic.

scholarly journals Insights into Starch Coated Nanozero Valent Iron-Graphene Composite for Cr(VI) Removal from Aqueous Medium

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Prasanna Kumarathilaka ◽  
Vimukthi Jayaweera ◽  
Hasintha Wijesekara ◽  
I. R. M. Kottegoda ◽  
S. R. D. Rosa ◽  
...  
Keyword(s):  
Point Of Zero Charge ◽  
Inert Material ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Graphene Composite ◽  
Removal Capacity ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
First Time

Embedding nanoparticles into an inert material like graphene is a viable option since hybrid materials are more capable than those based on pure nanoparticulates for the removal of toxic pollutants. This study reports for the first time on Cr(VI) removal capacity of novel starch stabilized nanozero valent iron-graphene composite (NZVI-Gn) under different pHs, contact time, and initial concentrations. Starch coated NZVI-Gn composite was developed through borohydrate reduction method. The structure and surface of the composite were characterized by scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), and point of zero charge (pHpzc). The surface area and pHpzc of NZVI-Gn composite were reported as 525 m2 g−1 and 8.5, respectively. Highest Cr(VI) removal was achieved at pH 3, whereas 67.3% was removed within first few minutes and reached its equilibrium within 20 min obeying pseudo-second-order kinetic model, suggesting chemisorption as the rate limiting process. The partitioning of Cr(VI) at equilibrium is perfectly matched with Langmuir isotherm and maximum adsorption capacity of the NZVI-Gn composite is 143.28 mg g−1. Overall, these findings indicated that NZVI-Gn composite could be utilized as an efficient and magnetically separable adsorbent for removal of Cr(VI).

Performances of nanofi ltration and reverse osmosis in textile industry waste water treatment

2010 ◽  
Vol 22 (1-3) ◽  
pp. 182-186 ◽  
Author(s):  
Emna Ellouze ◽  
Sami Souissi ◽  
Amel Jrad ◽  
Raja Ben Amar ◽  
Abdelhamid Ben Salah
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Reverse Osmosis ◽  
Textile Industry ◽  
Waste Water Treatment ◽  
Industry Waste

Full-scale application of the IAWQ ASM No. 2d model

2001 ◽  
Vol 44 (2-3) ◽  
pp. 17-24 ◽  
Author(s):  
R. Carrette ◽  
D. Bixio ◽  
C. Thoeye ◽  
P. Ockier
Keyword(s):  
Waste Water ◽  
Decay Rate ◽  
Textile Industry ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Building Blocks ◽  
Reduction Factor ◽  
Waste Water Treatment Plant ◽  
Industrial Discharge ◽  
2D Model

In the framework of the EU-funded TTP-UPM project (Technology Transfer Project - Urban Pollution Management) the waste water treatment plant (WWTP) of Tielt was modelled with the recently issued IAWQ ASM No. 2d model. Up to 41% of the total COD load is originating from a textile industry. A measurement campaign was conducted during a period with industrial discharge and a period with only domestic sewage. The stop of the industrial discharge resulted in a highly dynamic response of the system. Based on an expert-approach the calibration was obtained changing only four parameters (anaerobic hydrolysis reduction factor ηfe, reduction factor for denitrification ηNO3, the decay rate of autotrophs bAUT and the decay rate of the bio-P organism building blocks bPAO, bPHA, bPP). Influent fractionation remains a critical step within the model calibration. A proven procedure to characterise the influent determinants by standard physical chemical analysis failed to assess the influent COD fractions when the textile waste water is discharged to the WWTP. Selected bench-scale experiments, instead, succeeded in providing the adequate influent characterisation accuracy. For characterising the readily biodegradable COD fraction respirometry is to be preferred.

scholarly journals A study by non-isothermal thermal methods of spruce wood bark materials after their application for dye removal

2005 ◽  
Vol 70 (11) ◽  
pp. 1325-1333 ◽  
Author(s):  
Viorica Dulman ◽  
Lucia Odochian ◽  
Mihai Dumitras ◽  
Cucu Man
Keyword(s):  
Textile Industry ◽  
Waste Water Treatment ◽  
Oxidative Degradation ◽  
Blue Dye ◽  
Retention Capacity ◽  
Thermal Methods ◽  
Weight Losses ◽  
Spruce Bark ◽  
Thermogravimetric Data ◽  
Dye Retention

This paper deals with a study of some materials obtained from spruce bark (Picea abies, Romania), after retention of some dyes frequently used in dyeing processes in the textile industry and waste water treatment. These materials obtained by dye retention exhibit a particular thermal behavior which is different from that of the blank sample (spruce bark). The characteristic temperatures, weight losses, the residue remaining after thermo-oxidative degradation, as well as the activation energies of the significant thermo-destruction stages, estimated from non-isothermal thermogravimetric data, together with the thermal quantities calculated from DTA data support the conclusion presented in a previous study on dye retention from aqueous solution. The obtained results made evident that, under optimal retention conditions, spruce bark shows the highest retention capacity for the Basic Blue dye, followed by Direct Brown 95 and Direct Brown 2.

scholarly journals Evaluation of Kinetic and Equilibrium Parameters of NiFe2O4 Nanoparticles on Adsorption of Reactive Orange Dye from Water

2016 ◽  
Vol 10 (2) ◽  
pp. 51-58
Author(s):  
Raziyeh Zandi Pak ◽  
◽  
Soheil Sobhan Ardakani2 ◽  
Keyword(s):  
Contact Time ◽  
Magnetic Nanomaterials ◽  
X Ray Diffraction ◽  
Anionic Dyes ◽  
Solution Ph ◽  
Removal Capacity ◽  
Pseudo Second Order ◽  
Nife2o4 Nanoparticles ◽  
Reactive Orange ◽  
Kinetics Of

Background: Among different pollutants released into the environment, dyes are considered as one of the most dangerous contaminants. In recent years, magnetic nanomaterials have attracted much attention for their dye removal capacity. The aim of this study was to explore the adsorption kinetics of an anionic dye (Reactive Orange 13 (RO)) by NiFe2O4 nanoparticles (NiFe2O4 NPs) under various conditions. Methods: NiFe2O4 nanoparticles (NiFe2O4 NPs) were prepared and characterized by X-ray diffraction (XRD), transmission electronic microscopy (TEM), pHpzc and BET methods. The adsorption characteristics of the NiFe2O4 NPs adsorbent were examined using Reactive Orange 13 as an adsorbate. The influences of parameters including pH, dose of adsorbent and contact time were investigated to find the optimum adsorption conditions. Results: Decreasing solution pH and increasing contact time were favorable for improving adsorption efficiency. The kinetic and isotherm data of RO adsorption on NiFe2O4 NPs were well fitted by pseudo-second-order and Langmuir models, respectively. Conclusion: The maximal adsorption capacity of RO was 243.9 mg g-1 at 25◦C and pH 3.0 and the adsorption of RO on the NiFe2O4 NPs follows a monolayer coverage model. NiFe2O4 NPs might be an effective and potential adsorbent for removing anionic dyes from aqueous solutions.

scholarly journals Removal of an Ethoxylated Alkylphenol by Adsorption on Zeolites and Photocatalysis with TiO2/Ag

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 889 ◽  
Author(s):  
Claudia Aguilar Ucán ◽  
Mohamed Abatal ◽  
Carlos Montalvo Romero ◽  
Francisco Anguebes Franseschi ◽  
Miguel Angel Ramirez Elias ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Adsorption Process ◽  
Nano Particles ◽  
Natural State ◽  
Photocatalytic Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Removal Capacity ◽  
Pseudo Second Order ◽  
Degussa P25

Two advanced removal methods (adsorption and photocatalysis) were compared for the elimination of an ethoxylated alkylphenol (nonylphenol polyethylene glycol, NPEG). For the adsorption process, zeolites were used in their natural state, and the process was characterized by DRX (X-ray diffraction) and SEM–EDS (Scanning electron microscopy). The analysis of the results of the adsorption kinetics was carried out using different isotherms to interpret the removal capacity of zeolites. The Temkin kinetic model better predicted the experimental data and was satisfactorily adjusted to models of pseudo-second order (PSO). On the other hand, for photocatalysis, nano-particles of Ag (silver) were deposited on titanium oxide (TiO2) Degussa-P25 by photo-deposition, and the catalyst was characterized by diffuse reflectance and SEM–EDS. The data obtained using the two removal techniques were analyzed by UV–Vis (ultraviolet-visible spectrophotometry) and total organic carbon (TOC). The kinetic data were compared. The photocatalytic process showed the highest efficiency in the removal of NPEG, corresponding to >80%, while the efficiency of the adsorption process was <60%. This was attributed to the recalcitrant and surfactant nature of NPEG.

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