scholarly journals Biosorption As A Perfect Technique for Purification of Wastewater Contaminated With Ammonia

2021 ◽  
Author(s):  
Ibrahim Abdelfattah ◽  
Fathy A. El-Saied ◽  
Ali A. Almedolab ◽  
Ashraf M. El-Shamy
Keyword(s):  
Flow Rate ◽  
Eichhornia Crassipes ◽  
Ph Value ◽  
Freundlich Isotherm ◽  
Ammonia Concentration ◽  
Ammonia Removal ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Continuous Adsorption ◽  
Copper Zinc

Abstract Eichhornia Crassipes root powder (ECRP) has been used to remove ammonia from aqueous solutions. The biosorption factors such as biosorbent dosage, pH, initial ammonia concentration, and contact time have been considered in batch conditions. The optimal conditions, at pH (6), sorbent dose 5 g/l, time (30 min) ammonia concentration (10 mg/l). Langmuir is better suited than Freundlich isotherm. The kinetic models: Thomas, Yoon-Nelson, and Bohart-Adm were applied. These models showed that; the adsorption capacity decreased with flow rate increases as follows: (32.57, 31.82, 31.25, and 30.17 mg/gm) respectively at a flow rate (10, 15, 20, and 25 ml/min). The roots powder of Eichhornia Crassipes was used to treat specific drainage wastewater obtained from the Sabal drain at Menoufia, Egypt. The average efficiency of ammonia removal was 87% per batch adsorption method at pH value = 7.5, sorbent dose 5 g/L, uptake period (30 minutes), and primary load 7.1 mg/l; however, ammonia removal by column continuous adsorption method exceeded 94 %. In addition, (ECRP) has been shown to be efficient in removing arsenic, sulfate, nitrates, nitrite, silica, iron, manganese, copper, zinc, aluminum, and lead from actual sewage wastewater, in addition to removing more than 75 % COD.

scholarly journals The Removal of Methylene Blue Dye from Aqueous Solutions Using Activated and Non-Activated Bentonites

2003 ◽  
Vol 21 (5) ◽  
pp. 451-462 ◽  
Author(s):  
Sameer Al-Asheh ◽  
Fawzi Banat ◽  
Leena Abu-Aitah
Keyword(s):  
Methylene Blue ◽  
Ph Value ◽  
Sodium Dodecyl ◽  
Freundlich Isotherm ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Ionic Surfactant ◽  
Methylene Blue Dye ◽  
X Ray Diffraction ◽  
Initial Ph

An improvement in the adsorption capacity of naturally available bentonite towards water pollutants such as Methylene Blue dye (MBD) is certainly needed. For this purpose, sodium bentonite was activated by two methods: (1) treatment with sodium dodecyl sulphate (SDS) as an ionic surfactant and (2) thermal treatment in an oven operated at 850°C. Batch adsorption tests were carried out on removing MBD from aqueous solution using the above-mentioned bentonites. It was found that the effectiveness of bentonites towards MBD removal was in the following order: thermal-bentonite > SDS-bentonite > natural bentonite. X-Ray diffraction analysis showed that an increase in the microscopic bentonite platelets on treatment with SDS was the reason behind the higher uptake of MBD. An increase in sorbent concentration or initial pH value of the solutions resulted in a greater removal of MBD from the solution. An increase in temperature led to an increase in MBD uptake by the bentonites studied in this work. The Freundlich isotherm model was employed and found to represent the experimental data well.

scholarly journals Removal of Dyes from Wastewater of Artisanal Dyeing Plants by Adsorption in a Fixed Bed Column of Deactivated Lichens

2021 ◽  
pp. 1-11
Author(s):  
Kouassi Kouadio Dobi-Brice ◽  
Yacouba Zoungranan ◽  
Dje Daniel Yannick ◽  
Ekou Lynda ◽  
Ekou Tchirioua
Keyword(s):  
Ivory Coast ◽  
Fixed Bed ◽  
Batch Adsorption ◽  
Real Problem ◽  
Adsorption Method ◽  
Fixed Bed Column ◽  
Good Efficiency ◽  
Continuous Adsorption ◽  
Column Adsorption ◽  
Study Laboratory

Aims: Pollution by wastewaters from various urban activities such as artisanal dyeing plants is a real problem for developing countries. The treatment of wastewater by the adsorption method is carried out by means of less expensive and available adsorbent media. Two techniques of the adsorption method are possible: adsorption in continuous mode (column adsorption) and adsorption in discontinuous mode (batch adsorption). The choice of the continuous adsorption technique is justified by its ability to process large volumes of solutions. In this study, dyes contained in wastewater from artisanal dyeing plants were removed by continuous adsorption in a fixed-bed column of deactivated lichen biomass (Parmotrema dilatatum). Study Design: Random design Place and Duration of Study: Laboratory of Thermodynamics and Environmental Physico-Chemistry (University Nangui Abrogoua, Ivory Coast) between May 2020 and October 2020. Methodology: Four (4) categories of wastewater were collected in artisanal cotton and leather dyeing plants through two municipalities of the city of Abidjan, economic capital of Ivory Coast. Two (2) wastewaters colored in blue from dyeing of cotton boubous and jeans and two (2) wastewaters colored in red from dyeing of leather jackets and bags. These wastewaters were treated through the fixed bed column of deactivated lichens. The column feed rate was set at 0, 07 L.min-1 and the adsorbent bed mass at 100 g. Results: The study showed that, regardless of the nature of the dyed object and regardless of the target dye, the amount of dye adsorbed was better with waters of higher initial concentration. Thus the best amount of adsorbed dye is 44.444 mg.g-1 and the best removal rate is 97.9%. These values are obtained with the red wastewater of bags (RWB) treatment which was the most concentrated wastewater. Conclusion: Good efficiency of deactivated lichen bed as adsorbent for the in situ removal of dyes from wastewater by continuous adsorption.

scholarly journals Effects and mechanistic aspects of absorbing organic compounds by coking coal

2017 ◽  
Vol 76 (9) ◽  
pp. 2280-2290 ◽  
Author(s):  
Kejia Ning ◽  
Junfeng Wang ◽  
Hongxiang Xu ◽  
Xianfeng Sun ◽  
Gen Huang ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Ph Value ◽  
Freundlich Isotherm ◽  
Systemic Circulation ◽  
Batch Adsorption ◽  
Phenol Removal ◽  
Coal Consumption ◽  
Coking Coal ◽  
Freundlich Isotherms ◽  
Novel Method

Abstract Coal is a porous medium and natural absorbent. It can be used for its original purpose after adsorbing organic compounds, its value does not reduce and the pollutants are recycled, and then through systemic circulation of coking wastewater zero emissions can be achieved. Thus, a novel method of industrial organic wastewater treatment using adsorption on coal is introduced. Coking coal was used as an adsorbent in batch adsorption experiments. The quinoline, indole, pyridine and phenol removal efficiencies of coal adsorption were investigated. In addition, several operating parameters which impact removal efficiency such as coking coal consumption, oscillation contact time, initial concentration and pH value were also investigated. The coking coal exhibited properties well-suited for organics' adsorption. The experimental data were fitted to Langmuir and Freundlich isotherms as well as Temkin and Redlich–Peterson (R-P) models. The Freundlich isotherm model provided reasonable models of the adsorption process. Furthermore, the purification mechanism of organic compounds' adsorption on coking coal was analysed.

scholarly journals Comparative Study between Zn and Cu Nano Ferrite in Removal of Heavy Metals and Microorganisms from Water

2021 ◽  
Vol 17 (4) ◽  
pp. 1-19
Author(s):  
Azhar Jabbar Bohan ◽  
Ghaed Khalef Salman ◽  
Ghaidaa Majeed Jaid
Keyword(s):  
Heavy Metals ◽  
Composite Materials ◽  
Freundlich Isotherm ◽  
Nano Particles ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorption Method ◽  
Nano Composite ◽  
Removal Of Heavy Metals

The effect of Nano composite materials (CuFe2O4 and ZnFe2O4) was studied for removal of heavy metals (Cd (II) and Pb (II)) from wastewater by batch adsorption method and explain their effect on the antimicrobial effectiveness on gram positive and negative bacteria. Nano composite materials were characterized by XRD where the result indicates that the average crystallite sizes were around 36.19 nm for ZnFe2O4 and 12.22 nm for CuFe2O4.The effect of contact time, adsorbent dose, pH and type of adsorbents was used to find the optimum condition for removal of Cd(II) and Pb(II) ions .The equilibrium adsorption data was good fitted to the Langmuir and Freundlich isotherm models, and the pseudo first-order kinetic model showed the excellent fit in adsorption equilibrium capacity. The best pH used for removal was 7. The good removal reaches at the time 45 min for cadmium and need more time for lead. When increasing dosage of adsorbents, the removal efficiency increases. Freundlich and Langmuir isotherm gave the best fit experimental data. Also, antibacterial effects of this nano particles demonstrated the effect of CuFe2O4 NPs on bacteria more than used ZnFe2O4 NPs, and the percentage of bacterial death was increased according to increase the concentration of this materials.

scholarly journals Adsorption Behaviour of Chromium(VI) onto Surface Modified Sugarcane Waste

2013 ◽  
Vol 28 (1-2) ◽  
pp. 113-122
Author(s):  
Kedar Nath Ghimire ◽  
Deepak Wagle ◽  
Suman Lal Shrestha
Keyword(s):  
Volume Ratio ◽  
Freundlich Isotherm ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Adsorption Method ◽  
Chromium Vi ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Surface Modified

An effective chemically modified adsorbent based on sugarcane waste has been prepared by treating with concentrated sulphuric acid in 2:1weight/volume ratio. Thus prepared adsorbent has been found to be effective in the adsorption of chromium from aqueous medium. The efficacy of the adsorbent in the removal of chromium was evaluated by batch adsorption method. The effect of initial concentration, contact time and pH of the solution was investigated. The maximum adsorption capacity onto this adsorbent was found to be 195 mg/g at their optimal pH 1 at which unmodified bagasse has only 58 mg/g. The characterization of adsorbent was done by determining surface area and Boehm’s titration method. Freundlich isotherm and pseudo-second order kinetic model gave better explanation of the adsorption process.

scholarly journals Bioadsorption of Basic Blue Dye from Aqueous Solution onto Raw and Modified Waste Ash as Economical Alternative Bioadsorbent

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Adugna Nigatu Alene ◽  
Gietu Yirga Abate ◽  
Adere Tarekegne Habte
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Freundlich Isotherm ◽  
Industrial Effluents ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Living Organisms ◽  
Economical Alternative

Background. Dyes are one of the most hazardous materials in industrial effluents which can cause several health problems in living organisms. The removal of dye from colored effluents has attracted increasing attention in the last decade. In this study, raw, beneficiated, and activated waste ash were evaluated as adsorbents for removal of methylene blue (MB) from aqueous solution by the batch adsorption method. Comprehensive characterization studies were carried out on each bioadsorbent, such as proximate analyses, bulk density, specific surface area, point of zero charge, pH, and Fourier transform infrared (FTIR) spectroscopy (which shows functional groups on adsorbents surface). The effects of pH, adsorbent dosage, initial dye concentration, and contact time were determined in order to know the optimum condition and adsorption potential of the adsorbents. The methylene blue (MB) removal efficiency of raw, beneficiated, and activated bioadsorbents from aqueous solutions was found to be 95.212%, 89.172%, and 84.504%, respectively. It is reported that adsorption efficiency of MB on each adsorbent was quite different due to electrostatic and dispersion interaction between the dye molecules and the surface property of the adsorbents. The obtained results were well fitted with the Freundlich isotherm model, and the adsorption process follows the pseudo-second-order kinetics model for all adsorbents. In fact, the results showed that raw, beneficiated, and activated waste ash bioadsorbents could be employed as effective and economical alternative material in the near future.

scholarly journals The Chicken Utilization Of Α-Keratin Of Waste Chicken Feathers In Enviromental As Adsorben Of Procion Red And Remazol Yellow Dye

2019 ◽  
Vol 1 (3) ◽  
pp. 12-14
Author(s):  
SAGA DERMAWAN DWI LAKSANA ◽  
ERICK RYAN YULIANTO ◽  
EDI PRAMONO
Keyword(s):  
Contact Time ◽  
Freundlich Isotherm ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Chicken Feathers ◽  
Vis Spectroscopy ◽  
Experimental Parameters ◽  
Dye Absorption ◽  
Red Dye

as the adsorbent. The adsorption characterization of activated chicken feathers by Na2S 0.1 N and non-activated chicken feathers was determined. Effect of variation experimental parameters pH, Contact time and variation dye concentration also being investigated in a batch adsorption method. Procion and Remazol Yelloow were characterized by UV-Vis spectroscopy VV The results show that the contact time and pH condition for adsorption equilibrium are 120 min for activated chicken feathers and 100 min for chicken feathers which were not activated by Na2S at pH 3. Procion red dye absorption by activated and not activated chicken feathers follows Freundlich isotherm and follow Langmuir isothrem. For remazol yellow dye absorption by activated and not activated chicken feathers follows Langmuir isotherm and Freundlich isothrem and the reaction kinetics follow the Ho equation.   Keywords: adsorption, chicken feather, procion red, remazol yellow

scholarly journals Improvement of organic matter removal in water produced of oilfields using low cost Moringa peels as a new green environmental adsorbent

2020 ◽  
Keyword(s):  
Treatment Process ◽  
Produced Water ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Processing Parameters ◽  
Organic Content ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data

<p>The present study observed the removal of the organic content from the real effluent water produced by the oilfields. The proposed treatment process was the adsorption technique using the moringa peels as adsorbing agent. The effect of processing parameters such as adsorbent dosage, contact time and pH has been investigated using the batch adsorption method. The Langmuir isotherm provided a better fit for the adsorption equilibrium data than the Freundlich isotherm. It was observed that organic content adsorption was dependent on pH. The maximum removals of organic content were 65.4 % and 94.1% for moringa and activated moringa peels respectively at pH =3, 120 min, 1.5 gm dose. The outcome of this study exposes that activated moringa peels might be rummage-sale as a low-cost adsorbent for the removal of organic content from produced water.</p>

scholarly journals Treatment of wastewater from a dairy plant by adsorption using synthesized copper oxide nanoparticles: kinetics and isotherms modeling optimization

2021 ◽  
Author(s):  
Nada M. Al-Ananzeh
Keyword(s):  
Copper Oxide ◽  
Contact Time ◽  
Adsorption Process ◽  
Ph Value ◽  
Freundlich Isotherm ◽  
Copper Oxide Nanoparticles ◽  
Batch Adsorption ◽  
Oxide Nanoparticles ◽  
Sophora Japonica ◽  
Kinetics And Isotherms

Abstract Dairy plants produce 1 to 4 liters of wastewater per one liter of processed milk. The wastewater contains high values of COD and BOD concentrations, in addition to high levels of dissolved solids. In this study, synthesized copper oxide nanoparticles (CuONPs) coupled with Sophora Japonica fruit, were used as an adsorbent, for the first time, to treat the effluent of dairy plants in a batch adsorption process. The analysis techniques, FTIR, XRD and SEM were utilized to characterize the adsorbent. The COD removal, using (CuONPs)-based adsorbent, was investigated by varying contact time, masses of the adsorbent, initial COD value and temperatures. The optimum conditions for highest removal percentage were contact time of 120 minutes, a temperature of 25 °C, pH value of 7.5, and 1 g of adsorbent. The initial COD values used were in the range of 100–700 ppm. The COD percent removal was in the range of 77 to 95%. Freundlich isotherm exhibited the best fitting for the results (R2 = 0.998) with a favorable spontaneous exothermic adsorption process. Based on the calculated normalized deviation value, the modified diffusion model, intra-diffusion, and pseudo-second order kinetics all showed very good fitting for the adsorption data as indicated by the kinetics study.

scholarly journals Bio-adsorption of Basic blue dye from aqueous solution onto raw and modified waste ash as economical alternative bio-adsorbent

2020 ◽  
Author(s):  
Adugna Nigatu Alene ◽  
Gietu Yirga Abate ◽  
Adere Tarekegne Habte
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Freundlich Isotherm ◽  
Industrial Effluents ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Adsorption Method ◽  
Alternative Material ◽  
Economical Alternative

Abstract Background : Dyes are one of the most hazardous material in industrial effluents which can cause several health problems in bio-life. The removal of dye from colored effluents has been attracted increasing attention in the recent decay. In this study raw, beneficiated and activated waste ash was evaluated as an adsorbent for removal of methylene blue (MB) from aqueous solution by batch adsorption method. Comprehensive characterization studies were carried out on each bio-adsorbents such as proximate analyses, bulk density, specific surface area, point of zero charge, pH and Fourier-Transform Infrared (FTIR) spectroscopy (which shows functional groups on adsorbents surface). Results : The effects of pH, adsorbent dosage, initial dye concentration, and contact time were determined in order to know the optimum condition and adsorption potential of the adsorbents. The methylene blue (MB) removal efficiency of raw, beneficiated and activated bio-adsorbents from aqueous solutions was recorded to be 95.212%, 89.172%, and 84.504%, respectively. It is reported that adsorption efficiency of MB on each adsorbents was quite different due to electrostatic and dispersion interaction between the dye molecules and the surface property of the adsorbents. The obtained results were well fitted with Freundlich isotherm model and adsorption process follows the pseudo second order kinetics model for both adsorbents. Conclusions : In fact the results showed that raw, beneficiated and activated waste ash bio-adsorbents could be employed as effective and economical alternative material in the near future use. Key words : Bio-adsorption, waste ash, adsorption capacity, surface modification, basic blue dye.

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