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This study investigated the adsorption of Cd(II) ions in aqueous solutions onto the chitosan flakes cross-linked with glutaraldehyde (Gch), and citric acid (CGch). The optimal conditions for these adsorptions process were found to be at pH 6 with contact time of 400 min for Gch and 350 min for CGch. The Cd(II) adsorption process on Gch and CGch well fitted to the pseudosecond-order model. The data...
The main aim of this work was to explore the potential application of orange peel waste as biosorbents for removing methylene blue (MB) in aqueous solution. We will investigate the effects of different adsorption parameters such as the initial concentration of MB, adsorption time; adsorbent dosage, adsorption temperature and initial pH on MB adsorption. It was found that the adsorption capacity was...
In this work we study equilibrium and kinetic adsorption process of Methylene Blue (MB) and Copper phthalocyanine (CuPhTh) dyes on TiO2 thin films. We synthesized phthalocyanines through Achar method; dyes were characterized by Fourier-Transform Infrared spectroscopy (FTIR) and Diffuse reflectance. TiO2 thin films were fabricated by Doctor Blade method for using Degussa P25 as TiO2 source. We used...
Since heavy metal pollution is a significant aspect to aquatic ecosystems, the objective of this research work was to investigate adsorption characteristics of chitosan as an alternative adsorbent material. In this study, chitosan, synthesized from locally available shrimp type “penaeus monodon” was used to observe adsorption characteristics of cadmium (Cd) and lead (Pb) heavy metals from aqueous...
This paper explores the potential of French green beans (Phaseolus Vulgaris) and Lotus Stem (Nelumbo Nucifera) as potential low-cost adsorbents for the removal of Methylene Blue from wastewater. The studies were conducted with variation in parameters of pH, biomass concentration, contact time and initial dye concentration. The nature of the possible adsorbent and metal ion interactions was examined...
The model of pressure swing adsorption separation process for CO2 with zeolite molecular sieve is established in this paper. The pressure swing adsorption system of CO2 is simulated with mass, gas and energy balance equations. The CO2 adsorption isotherm is fitted by Dual-site Langmuir equation. The recovery rate, productive rate and energy of the separation process is designed. Finally, the model...
The present study is concerned by the exploration of the capability of natural and synthetic adsorbents to retain methyl orange dye. The effect of key operating parameters such as contact time, adsorbent dosage, initial pH and initial dye concentration on retention capacity, were investigated for these adsorbents. Various isotherm models like Langmuir and Freundlich were tested for the adsorption...
Adsorption of Remazol Brilliant Blue R (RBBR) by rambutan peel (RP) was examined. The adsorption experiments were carried out under different conditions of initial concentration (25–500 mg/L), solution pH 2–12 and RP dose (0.05–1.2 g). The influence of these parameters on the adsorption capacity was studied using the batch process. RBBR adsorption uptake was found to increase with increase in initial...
Adsorption of methylene blue (MB) by NaOH-treated rambutan peel (N-RP) was examined. The adsorption experiments were carried out under different conditions of initial concentration (25–500 mg/L), solution pH 2–12 and N-RP dose (0.05–1.0 g). The influence of these parameters on the adsorption capacity was studied using the batch process. MB adsorption uptake was found to increase with increase in initial...
The kinetic, equiLibrium and thermodynamics of Cr(VI) adsorption from aqueous solution on cetylpyridinium bromide (CPB) modified zeoLite were investigated. CPB modified zeoLite displayed a good affinity to Cr(VI) in aqueous solution, and its Cr(VI) adsorption capacity decreased with the increase of the temperature. The kinetics of adsorption of Cr(VI) were discussed using the pseudo-first-order and...
Activated Carbon is a water treatment adsorbent with a large adsorption capacity, its adsorption capacity will be able to greatly enhance after modified activated. Through the use of before and after the modification of mesoporous activated carbon powder to the heavy metals copper ion adsorption, the effects of different pH, adsorption temperature, balance time, the amount of activated carbon adsorption...
The properties of adsorption of shikimic acid by activated carbons were investigated in batch experiments. The adsorption of shikimic acid was strongly influenced by temperature. The Freundlich and Langmuir models were used to fit experimental data. The results of regression showed that the Freundlich equation was more suitable. Some thermodynamic parameters were calculated. The changes in enthalpy...
The biosorption of reactive red on acid-treated Penicilium sp. was investigated in a packed-bed column. The column experiments were conducted to study the effect of operating parameters such as initial dye concentration, adsorbent dose and flow rate on the column removal capacity. The Thomas model was used to analyze the experimental data. Column experiments showed that the fungal mycelia mixed with...
The ability of Mg-Fe layered double hydroxide to remove C. I. Reactive Red 2 from aqueous solution was investigated. The influence of molar ratio of Mg-Fe, solution pH, contact time and initial dye concentration on adsorption capacity of C. I. Reactive Red 2 was studied. Batch isotherm studies were carried out on a laboratory scale to evaluate the adsorption capacity of Mg-Fe layered double hydroxide...
Removal of glyphosate from aqueous solutions by using gel basic anion exchange resin N201 was investigated in the paper. The effects of solution initial concentration, temperature, and contact time were studied. Adsorption isotherms were determined using Langmuir and Freundich equations. The results clearly showed that the adsorption of glyphosate onto N201 followed Freundich model and the adsorption...
The removal of reactive red 2 and methylene blue from aqueous solution was studied using soybean meal as an adsorbent. The effects of some parameters such as solution pH and contact time on the adsorption were investigated. The equilibrium time was found to be more than 60 min for equilibration. Equilibrium data conformed to the Freundlich, Langmuir and Redlich-Peterson isotherm models, where the...
Cr(VI) has posed great threat on environmental safety and human health, thus the remediation of Cr(VI) pollution is of considerable importance. The adsorption of Cr(VI) from aquatic solution using activated carbon was studied in this paper. The Cr(VI) sorption was relative to pH, contact time, initial content of solution, adsorbent dose and temperature. The maximum removal efficiencies of Cr(VI) were...
The ammonia nitrogen and phosphorus adsorption on natural zeolite were studied. Experimental data shows, the Freundlich and Langmuir models agrees very well with experimental data on ammonium and phosphorus, respectively ; Zeolite adsorption of ammonia nitrogen and phosphorus removal process should follow the secondary dynamic equation; In certain concentration range of ammonia nitrogen, zeolite and...
Isotherms and kinetics of adsorption of phenol on microwave organic modified montmorillonite were investigated. The results show that the adsorption capacity of M-OMt was determined as 58.14 mg/g at the conditions of pH7.2 contact time of 1 hour and temperature of 20 C. The adsorption data is a good fit with Freundlich isotherm, and the adsorption kinetics is in better agreement with pseudo-second...
In the present study we reported the feasibility of extra cellular biopolymer( PFC02) produced by Pseudomonas alcaligenes as an alternative biosorbent to remove Co(II) metallic ions from environmental and industrial wastewater. The effects such as pH, dosage of biosorbent, Co(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PFC02 were studied...
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