Adsorption removal of Cu(II) and Cd(II) from aqueous solution using low-cost banana peels (a food waste) and bentonite clay (natural resource), was investigated. The adsorption process was studied in a batch scale at mean operation parameter which were pH, adsorbent particle size, adsorbents dosages, and initial concentrations of metal ions. All experiments were conducted at room temperature. L...

The present work represents the biosorption of Cd(II) and Pb(II) from aqueous solution onto the biomass of the blue green alga Anabaena sphaerica as a function of pH, biosorbent dosage, contact time, and initial metal ion concentrations. Freundlich, Langmuir, and Dubinin-Radushkevich (D-R) models were applied to describe the biosorption isotherm of both metals by A. sphaerica biomass. The bioso...

Rosaniline-grafted polyurethane foam (Ros-PUF) has been synthesized, by coupling polyether polyol, rosaniline, and toluene diisocyanate, and characterized, by use of UV–visible and IR spectroscopy and thermogravimetric analysis. The Ros-PUF was used as a new sorbent for extraction of trace amounts of Cd(II) and Hg(II) from water by batch and column techniques. Cd(II) and Hg(II) were completely ...

In the centrosymmetric title compound, [Cd(2)(C(13)H(12)NOS(2))(4)], pairs of dithio-carbamate ligands exhibit different structural functions. Each of the terminal ligands is bidentately coordinated to one Cd(II) atom and forms a planar four-membered CS(2)Cd chelate ring, whereas pairs of the tridentate bridging ligands link two neighbouring Cd(II) atoms, forming extended eight-membered C(2)S(4...

A new tris-chelate Cd(II) complex, [Cd(DADMBTZ)3](ClO3)2 has been successfully synthesized and characterized by IR, 1H, 13C NMR spectroscopy, elemental analysis and single crystal X-ray determination. The thermal behavior, UV-Vis and fluorescence spectra of compound were studied. In reaction with DADMBTZ, Cadmium (II) forms a tris-chelate complex with nearly C3 symmetry for coordination polyhed...

The chemistry of mineral surfaces is of great importance in many different areas including natural processes occurring in oceans, rivers, lakes and soils. Manganese (hydr)oxides are one important group to these natural processes, and the thermodynamically most stable trivalent manganese (hydr)oxide, manganite (γ-MnOOH), is studied in this thesis. This thesis summarises six papers in which the s...

Ligand selectivity of tartrate vs nicotinamide in a water-methanol system has been observed the crystallization Mn(II) and Cd(II) complexes. These complexes were crystallized at room temperature by layered solution technique using mixture solvent M(II):tartrate:nicotinamide (M = Mn, Cd) molar ratio 1:1:2. Complexes M(II)-nicotinamide M(II)-tartrate also prepared for data comparison. Analysis cr...

In this study, we studied the influence of dosage modified bamboo charcoal (KAM-500-400-3) on fixation effect single Cu(II)-contaminated and mixed Cu(II)–Cd(II)-contaminated sediment. The results showed that it could effectively fix heavy metals in both sediment types. sediment, when amount added KAM500-400-3 was greater than or equal to 5%, Cu(II) content overlying pore water substantially red...

A new dinuclear Cd(II)-azido complex of 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (PMT) pincer ligand is synthesized. Its single crystal X-ray structure reveals the [Cd(PMT)(Cl)(N3)]2 formula. The triclinic parameters are a = 9.323(4) Å, b 10.936(5) c 11.312(6) ? 112.637(10)°, ? 104.547(11)° and ? 105.133(10)° while V 944.1(8) Å3. Due to symmetry considerations, asymmetric ...