Elution profile of cationic and anionic adsorbate from exhausted adsorbent using solvent desorption

Present invention involves to study the elution profile of anionic and cationic compounds from exhausted adsorbents using various eluents. Batch elution studies of anionic components like Congo Red dye and Carbonate ion; and cationic compounds such as Methylene blue dye and Cadmium metal from previously used naturally prepared adsorbents i.e. Gulmohar (Delonix regia) leaf powder - GLP; and Neem (Azadirachta indica) leaf powder – NLP and their derivatives were conducted. Different eluents used for batch study were various acids and alkaline solution having various concentration and solvents having different functional groups in seven sorption-desorption cycles. The batch data were accessed by kinetic models (Pseudo First-, Pseudo Second-order, Intra-partice and Elovic equation). Column elution experiments of Congo red and Cadmium from NLP and activated charcoal from NLP (AC-NLP) respectively was performed using selected eluent. Sorption and elution process plots and parameters for seven sorption–desorption cycles were evaluated and discussed. Plots of life cycle indicating activity-indicator equations were drawn, and their parameters were calculated and mentioned. From desorption efficiencies, it revealed that desorption exploration is predominately depends upon pH factor.

PH Controlled the Supramolecular Assemblies of Two Guanosine Monophosphate Cadmium Metal Coordination Complexes: Structure and Chirality

In biological systems Chirality is important property from small molecules to macromolecules. The construction of homochiral coordination supramolecules in crystal and helical delivers the connection of molecular and macromolecular chirality. Complexity and properties in the presence of cadmium ion and bpe auxiliary ligand for bio-molecular guanosine-5- monophosphate disodium salt (GMP) was studied. The two Complexes 1 and 2 have been investigated the impact of auxiliary ligand bpe, hydroxy group on the sugar motif and pH for coordination of GMP ligands. The interaction of mixed ligands for growth and advancement of chiral complexes was controlled by the alteration of pH values for coordination of guanosine-5-monophosphate nucleotide with cadmium Cd (II) metal. The chirality of complexes 1 and 2 was studied with solid circular dichroism (CD) spectroscopy, including supramolecular chirality and extended auxiliary ligand (EAC) combining with the crystal structure analysis. The various hydrogen bonding and auxiliary ligand are the special means of transporting chirality from isolated molecules to dynamic supramolecular three-dimensional designs of GMP nucleotide crystals. The research results will be benefit to the controlling supramolecular assembly with well-defined structure and properties.

Employment of DC Sputtering for Synthesizing Nano Cadmium Oxide for Sevoflurane Anesthetic Gas Sensor

Thin films of CdO doped with AgNPs were deposited on ITO quartz substrates using DC sputtering protocol. The films were characterized using different techniques like XRD pattern for both undoped and doped one CdO NPs with silver nanoparticles, with various doping concentrations (0.4, 1.04, and 1.20) at%. It has been noticed from X-ray pattern that the nanostructured films possessed polycrystalline reflection patterns and the Prevailing orientation plane (111) on 2θ=33.35o in addition the reflection intensity increases with increasing of the doping concentration (1chip, 2chips and 3 chips) of Silver nanoparticles that chipped to the surface cadmium plate. Microstructures characterization of synthesized samples was studied using SEM. Images of SEM demonstrated that the particle size increases directly along with the number of implanting Silver NPs with three chips (1, 2 and 3) to the essential plate of Cd metal. EDXS spectroscopy counting the elemental composition using the atomic percentage, it has been demonstrated existence of silver in doped once. More, the percentage of silver content increase with increasing the number of Ag chips increases as follows The Ag content in the doped films of the cadmium metal plate with 1 attached is (1.39 wt. % for one Ag chip, 2.02 wt. % for two Ag chips while, the concentration has been increased further for three Ag chips to 3.24 at. %. Sensitivity of the manufactured device to Sevoflurane Anesthetic Gas Sensor indicates that the resistance decreases with the increase in the number of silver chips, and this is due to an increase of the pure charge carriers of the current. Keywords: Cadmium Oxide, Sliver, Structural Properties, DC reactive magnetron sputtering method, Sevoflurane Anesthetic Gas.

Preparation of Natural Ouw Clay-Chitosan Composite and Its Application as Lead and Cadmium Metal Adsorbent

This study aims to obtain the optimum ratio of Ouw Natural Clay (LAO):Chitosan in the manufacture of chitosan-LAO composites. The composite will be used as an adsorbent for heavy metals Lead (Pb) and Cadmium (Cd). LAO-Chitosan composites were made with the ratio of LAO:Chitosan = 1.25:1, 2.5:1, 5:1. XRD and SEM were carried out for each composite. The performance as a Cd metal adsorbent was determined by calculating the adsorption capacity. Composites with a ratio of 1.25:1 have the best adsorption capacity. The performance as adsorbent for Cd metal was determined by calculating the absorbed Cd concentration. Maximum results are achieved by composites with a ratio of 5:1.

An amino-functionalized three-dimensional cadmium metal–organic framework: Synthesis, characterization and excellent fluorescence sensing of Fe3+

An amino-functionalized three-dimensional cadmium metal–organic framework, [Cd1.5(L)(DMF)]·2H2O (complex 1) L = H3TTCA-NH2 = 2′-amino-[1,1′:3′,1″-terphenyl]-4,4″,5′-tricarboxylic acid), is successfully synthesized under solvothermal conditions and structurally characterized. Interestingly, as a transition metal organic framework, the cadmium metal–organic framework exhibits favorable luminescence properties. In addition, the cadmium metal–organic framework reveals excellent selective and sensitive fluorescence sensing for the recognition of Fe3+ with high quenching efficiency ( Ksv = 3.340 × 103 M−1), demonstrating that the cadmium metal–organic framework can be used as a potential sensor for Fe3+.

Optimalisasi Adsorpsi Kitosan Dari Kitin Cangkang Keong Sawah (Pilla Ampullacea) Terhadap Logam Kadmium (Cd)

This research aims to make the chitosan from the chitin of the Snail shell (Pilla ampulacea) which can be used as a cadmium metal adsorbent (Cd). It is derived from the isolation of the snail shells through 2 phases, which are deproteination to remove protein and demineralization to remove mineral salts. The formed Kitin is transformed into Chitosan by deacetylated using NaOH 60%. Kitin and Chitosan were acquired, identified by FTIR. The results showed that the chitin yield was 26.81% of the shell weight of 400 grams and the rendemen Chitosan was 31.78% of the weight of chitin. The results of the identification indicate the absorption area of chitin and chitosan function groups, similar to the standard chitin and chitosan uptake areas. Metal adsorption Cd uses adsorbent chitosan from the shell snail (pilla ampulacea) Most optimal occurs at a contact time of 15 minutes and on the weight of adsorbent 0.25 grams, the most optimal absorption occurs at a comparison of 1:30 weight chitosan/volume solution Cd.