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Polymer free calix[4]arene nanofibers were prepared via new electrospinning method with metal ion adsorption capacity. Two different calix[4]arene derivatives (compound 2 and 3) containing amide functionalities were used in this study, which were fully characterized by HNMR, FTIR and elemental analysis. Calix[4]arene nanofibers were analyzed with different surface characterization techniques such...
Effective energy storage and conversion technologies have attracted extensive attention for developing advanced rechargeable batteries. The high-energy capacity of molybdenum disulfide (MoS2) monolayer for Li-ion battery was recently introduced. Compared with Li-ion battery, the growing interests have been concentrated on the Na-ion batteries and Mg-ion batteries based on two-dimensional nanomaterials...
In this study, untreated and chemical treated PET recycled fibers were tested for the retention of Pb(II) and Cu(II) from aqueous media. Batch systems were used experimental as a function of initial concentration of metal ions, to highlight the possible utilization of this low-cost material in the wastewater treatment. Two chemical treatments (with Na2S2O3 and NaOH solutions, 4N) were used for the...
Heavy metal toxicity due to industrial waste water is a one of a threat to environment and living organisms. In this research, adsorption experiments were carried out using jackfruit leave powder as a bio-sorbent was assessed for Lead (Pb) adsorption from synthetic waste water. The effect of pH of waste water, contact time, adsorbent dosage and initial concentration of waste water were studied in...
The efficiency of a functionalized Disordered Mesoporous Silica-1 (DMS-1) to remove mercury ions disperse in water was evaluated. This material was functionalized using 3-mercaptopropyltrimethoxisilan as the source of thiol groups using the post-synthesis method. The aforementioned sorbent system was characterized using N2 adsorption-desorption isotherms, Fourier Transform Infrared spectrometry (FTIR),...
This research proposed the real-time detection of nitrite by employing electrochemical impedance spectroscopy (EIS) technique incorporating an interdigital capacitive sensor. A self-assembled monolayer functionalized the sensing surface with embedded ion-imprinted polymer (IIP) with selectivity for nitrite ions were introduced. Syntheis and characterization of IIP are also explained to validate the...
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...
Response surface methodology combined with Box-Behnken experimental design were employed to study the adsorption of U(VI) on microwave activated rice husk ash (ARHA) to elucidate the effects of parameters such as pH, adsorbent dose and U(VI) initial concentration on the adsorption process. Experimental data indicated that pH and adsorbent dose positively affected the adsorption process of U(VI) by...
We studied adsorption state of water molecules in a porous coordination polymer (PCP) using infrared spectroscopy. We observed two absorbance peaks below 4% relative humidity (RH) that originate from OH stretch modes of adsorbed water molecules. Their peak frequencies and areas indicate that one of the OH is free, and the other is hydrogen bonded. We also found that Free-OH plays a role of water attraction...
The present study predicts the feasibility for the adsorptive removal of Victoria Blue dye (VB dye) from aqueous solution using a low cost biosorbent Zizyphus Oenoplia seed (ZOS). In this study, a batch mode adsorption experiments were carried out using various parameters such as pH, contact time, concentration of dye, adsorbent dosage and temperature. The feasibility of the process is evaluated with...
Adsorption of Pb(II) ions onto thermal activated lignin was studied in batch system in order to analyze the potential use of this material as low cost adsorbent for rapid and efficient removal of Pb(II) ions from accidentally polluted waters. The experiments were performed as a function of initial Pb(II) concentration and contact time under optimal experimental conditions (initial solution pH of 6...
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...
The continuous adsorption of Pb (II) in a fixed column was studied in this work. Shea butter husk was treated in a polymeric mixture of calcium alginate to produce beads of approximately 1.56 mm ± 0.14 spherical shapes. Optimum parameters evaluated revealed an effective column performance at flow rate of 0.5 ml/min, bed heights of 12 cm and at initial concentrations of 50 mg/L. The percentage removal...
This paper represents the answer to many challenges in terms of numerical models for the transport of pollutants in drinking water. Due to these reasons this paper represents a particular methodology for estimating the velocity and dispersion coefficients. The aqueous solution transport and adsorption was performed using the COMSOL mathematical program.
This study provides a theoretical basis for use of Auricularia polytricha hyphae as an adsorbent for removal of heavy metal cadmium from aqueous solution. Adsorption effect was studied from suitable pH, application dosage, biosorption time and the initial concentration of cadmium. Little biosorption of metalions was observed for pH < 3.0. The cadmium removal capacity increased very sharply with...
At room temperature ion-ion correlations and counterions volume effect play a crucial role in the description of the electrical double layer of colloidal particles. In fact, in many instances, the inclusion of the short range correlations between ions in the study of the ionic distribution and the consideration of the ion's size lead to quite different results with respect to the classical treatment...
Biosorption can be used as a cost effective and efficient technique for the removal of toxic heavy metal from wastewater. Waste material from industries such as food processing and agriculture may act as potential biosorbent. This paper highlighted the potential used of local fruit waste as biosorbent for heavy metal removal in wastewater. According to Malaysian regulation, the discharge of the effluents...
Carbonized mulch (CM) was used to remove copper (Cu), zinc (Zn) and cadmium (Cd) in solutions and urban road runoff in this study. Parameters investigated included pH, sorbent amount and reaction time. The removal of all three metals by CM was determined by pH and the peak at pH 5.5. The adsorption kinetics of all three metals by CM could meet the pseudo-first-order equation. The adsorption isotherms...
Recently, the technique of magnetic separation has been used to dispose water, especially the waste water of low concentration. The technique of magnetic separation is that we segregate different materials with the power of magnetic field. In this study, using chitosan — as raw materials, magnetic materials as the Cole, organically-linking technique was applied to produce magnetic microspheres. The...
In this dissertation, the ceramic filter media is the new environment-friendly production of red mud, using chitosan as a modifier and the new ceramic filter as the carrier, which were used to modify its surface function, to improve its removal rate of copper ions. By the research of the sorption of the modified ceramic filter media on Cu2+, we have determined the impact of initial concentration,...
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