scholarly journals Separation of U (VI) ions from the aqueous phase onto polyphenol silica nanocomposite in the batch adsorption system

2021 ◽  
Vol 60 (4) ◽  
pp. 3819-3827
Author(s):  
Mohamed Ahmed Mahmoud
Keyword(s):  
Aqueous Phase ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Silica Nanocomposite

scholarly journals Application of Polyaniline Nano Composite for the Adsorption of Acid Dye from Aqueous Solutions

2012 ◽  
Vol 9 (3) ◽  
pp. 1266-1275 ◽  
Author(s):  
J.Raffiea Baseri ◽  
P.N. Palanisamy ◽  
P. Sivakumar
Keyword(s):  
Aqueous Solutions ◽  
Contact Time ◽  
Langmuir Model ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Acid Dye ◽  
Order Model ◽  
Nano Composite ◽  
Pseudo Second Order ◽  
Acid Violet

In this research, Polyaniline coated sawdust (Polyaniline nano composite) was synthesized via direct chemical polymerization and used as an adsorbent for the removal of acid dye (Acid Violet 49) from aqueous solutions. The effect of some important parameters such as pH, initial concentration of dye, contact time and temperature on the removal efficiency was investigated in batch adsorption system. The adsorption capacity of PAC was high (96.84 %) at a pH of 3-4. The experimental data fitted well for pseudo second order model. Langmuir model is more appropriate to explain the nature of adsorption with high correlation coefficient. The Energy of activation from arrehenius plot suggested that the adsorption of AV49 onto PAC involves physisorption mechanism.

Functionalized SBA-15 by amine group for removal of Ni(II) heavy metal ion in the batch adsorption system

2020 ◽  
Vol 174 ◽  
pp. 301-310 ◽  
Author(s):  
Talib M. Albayati ◽  
Anaam A. Sabri ◽  
Dalia B. Abed
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Batch Adsorption ◽  
Amine Group ◽  
Adsorption System

BIOSORPTION EVALUATION OF SYNTHETICDYE FROM FOOD INDUSTRY WASTEWATER ONTO SILKWORMCOCOONS: PRELIMINARY STUDIES

2018 ◽  
Vol 35 (2) ◽  
Author(s):  
GIOVANA GONÇALVES DUSI ◽  
ANDERSON MARCOS DIAS CANTELI ◽  
JOEL ROBERT KARP ◽  
LUCIANA IGARASHI MAFRA ◽  
AGNES DE PAULA SCHEER ◽  
...  
Keyword(s):  
Azo Dye ◽  
Food Industry ◽  
Kinetic Mechanism ◽  
Adsorption Kinetic ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Biosorption Process ◽  
And Diffusion ◽  
Best Fit ◽  
Industry Wastewater

The aim of this study was to evaluate thesynthetic azo dye (tartrazine) biosorption onto second line silkworm cocoons. Batch adsorption system was used to investigate the effect of pH and initial tartrazine concentration in theliquid phase. Also, the kinetic mechanismwas investigated at 20°C and pH 2.0.The highest adsorption was obtained at the lowest pH evaluated, while the assays with pH above 3.0 did not show significant adsorption at the first hour of theprocess, indicating that biosorption is more favorable at lower values ofpH.The adsorption kinetic was studied at pH 2.0andcompared withthe kinetic mechanism ofconvective mass transfer and diffusion models.The kinetic behavior of biosorption process showed a high amount of dye adsorbedat the beginning of the process, however, after saturation of the functional groups, the adsorption rate decreased over time until saturation. After 24 hours of batch operation, the uptake of tartrazine onto silkworm cocoons was 40.39 mg g-1,and the rate of adsorption reduces from 3.430 to 0.003 mg min-1g-1, suggesting that the process approaches the equilibrium. The Crank model provided the best fit. The results revealed that silkworm cocoons have the potential to be used as a biosorbent for wastewater treatment containing tartrazine

Adsorption of Direct Red 80 Dye from Solution by Sugarcane Bagasse and Modified Sugarcane Bagasse as Adsorbents

2016 ◽  
Vol 872 ◽  
pp. 175-180 ◽  
Author(s):  
Phatthraporn En-Oon ◽  
Ponsuparat Sansunon ◽  
Kowit Piyamongkala
Keyword(s):  
Adsorption Capacity ◽  
Sugarcane Bagasse ◽  
Adsorption Isotherms ◽  
Langmuir Isotherm ◽  
Adsorption Process ◽  
Experimental Results ◽  
Point Of Zero Charge ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Initial Concentration

The sugarcane bagasse and modified sugarcane bagasse with 1.0 M H2SO4 were used as adsorbents for removal of the direct red 80 in batch adsorption process. The effect on the initial concentration of the direct red 80, at 215.8 - 1028.9 mg/L, was thoroughly investigated in batch adsorption system. It was fount that the point of zero charge of sugarcane bagasse and modified sugarcane bagasse were pH 4.9 and 2.0, respectively. The adsorption capacity increased with initial concentration of direct red 80. The experimental results showed that adsorption capacity onto 1.0 g of sugarcane bagasse and modified sugarcane bagasse for direct red 80 initial concentration 1,028.9 mg/L were 4.2 and 28.9 mg/g, respectively. The Langmuir and Freundlich adsorption isotherms were applied to describe the direct red 80 uptake, which could be described by Langmuir isotherm onto both adsorbents.

scholarly journals Effect of zinc oxid on the bentonite ability for removing Methylene blue from solution

2013 ◽  
Vol 10 (2) ◽  
pp. 442-448
Author(s):  
Baghdad Science Journal
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Solid Phase ◽  
Langmuir Model ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Freundlich Model ◽  
Adsorption Capacities ◽  
Better Than

A batch adsorption system was applied to study the adsorption of methylene blue from aqueous solution by Iraqi bentonite and treated bentonite with different amount of zinc oxide (ZnO). The adsorption capacities of methylene blue onto bentonite were evaluated. The equilibrium between liquid and solid phase was described by Langmuir model better than the Freundlich model. Langmuir and Freundlich constants have been determined. The separation factor or equilibrium parameter, RL which is used to predict if an adsorption system is favourable or unfavourable was calculated for all cases.

scholarly journals Behavior of Uranium(VI) during HEDPA Leaching for Aluminum Dissolution in Tank Waste Sludges

2005 ◽  
Vol 893 ◽  
Author(s):  
Brian Anthony Powell ◽  
Linfeng Rao ◽  
Kenneth L. Nash ◽  
Leigh Martin
Keyword(s):  
Aqueous Phase ◽  
Uranium Concentration ◽  
Batch Adsorption ◽  
Diphosphonic Acid ◽  
High Ph ◽  
Neutral Ph ◽  
Enhanced Dissolution ◽  
Aluminum Hydroxides ◽  
Soluble Aluminum ◽  
Ph Range

AbstractBatch adsorption/dissolution experiments were conducted to examine the interactions between 233U(VI) and a synthetic aluminum oxyhydroxide (boehmite, γ-AlOOH) in 1.0M NaCl suspensions containing 1-hydroxyethane-1,1-diphosphonic acid (HEDPA). In the pH range 4 to 9, complexation of Al(III) by HEDPA significantly enhanced dissolution of boehmite. This phenomenon was especially pronounced in the neutral pH region where the solubility of aluminum, in the absence of complexants, is limited by the formation of sparsely soluble aluminum hydroxides. At high pH levels, dissolution of synthetic boehmite was inhibited by HEDPA, likely due to sorption of Al(III)/HEDPA complexes. Addition of HEDPA to equilibrated U(VI)-synthetic boehmite suspensions yielded an increase in the aqueous phase uranium concentration. The concentration of uranium continually increased over 59 days. Partitioning of uranium between the solid and aqueous phase was found to correlate well with HEDPA partitioning.

scholarly journals Acid modified jackfruit wood sawdust as biosorbent for the removal of Fe(II) from aqueous solutions

2018 ◽  
Vol 154 ◽  
pp. 01019 ◽  
Author(s):  
Tintin Mutiara ◽  
Primadonna Ciko Karisa ◽  
Intan Mujahidah
Keyword(s):  
Aqueous Solutions ◽  
Room Temperature ◽  
Batch Adsorption ◽  
Adsorption System ◽  
Adsorption Behaviour ◽  
Adsorption Efficiency ◽  
Uptake Capacity ◽  
Initial Concentration ◽  
Wood Sawdust ◽  
Acid Type

The adsorption of Fe(II) from aqueous solutions by acid modified jackfruit wood sawdust biosorbent was investigated in a batch adsorption system. The experiment conducted at room temperature and pH 5 resulted adsorption behaviour of chemical modified Jackfruit wood sawdust biosorbent. The removal of Fe(II) has been found to be the function of initial Fe(II) concentration, acid type and acid concentration. The best removal was at low Fe(II) initial concentration, the higher initial concentration resulted on lower adsorption. Untreated jackfruit wood sawdust has the highest adsorption efficiency, followed by acetic acid, citric acid and tartaric acid modified jackfruit wood sawdust. The maximum uptake capacity of Fe (II) ion was 1.05 mg/g by untreated jackfruit wood sawdust.

scholarly journals Adsorbent Minimisation for Removal of Ibuprofen from Water in a Two-Stage Batch Process

2021 ◽  
Author(s):  
Hajar Farzaneh ◽  
Jayaprakash Saththasivam ◽  
Gordon McKay ◽  
Prakash Parthasarathy
Keyword(s):  
Activated Carbon ◽  
Manufacturing Industry ◽  
Waste Product ◽  
Batch Process ◽  
Pharmaceutical Products ◽  
Batch Adsorption ◽  
Adsorption System ◽  
High Adsorption ◽  
Two Stage ◽  
Several Variables

Abstract Pharmaceutical products in water, frequently referred to as personal pharmaceutical products, PCPPs are regarded as problematic emerging pollutants with the potential to cause damaging health and environmental impacts to several ecosystems. In this study, an acid activated carbon has been produced from waste date stones, the waste product obtained from the seedless date products manufacturing industry. This material has been used to remove the pharmaceutical compound ibuprofen from water with a high adsorption capacity of 126 mg ibuprofen per g waste date stone derived activated carbon. In order to optimise the use of the activated carbon, a design study has been performed to minimise the quantity of carbon needed using a two-stage batch adsorption system. Several variables have been inputted into the design model to test the model and compare the quantities of adsorbent required in the two-stage and the single stage systems under various conditions.

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