[1] The geochemistry of cobalt in the Peru upwelling region is dominated by its importance as a micronutrient. A large and previously undocumented flux of labile cobalt behaved as a micronutrient with correlations with major nutrients (nitrate, phosphate; r = 0.90, 0.96) until depleted to 50 pM of strongly complexed cobalt. Co:P utilization ratios were an order of magnitude higher than in the N...

• Porous copper oxide nanosheets grow in situ on nickel foam surface (NF). Removes low-concentration nitrate rapidly with almost no production. CuO/NF exhibits excellent stability and N 2 selectivity reduction. Electrochemical techniques have shown advantages for the removal of nitrate. Here, were grown self-supporting (NF) to prepare electrodes (CuO/NF), which realized rapid highly selective c...

Recently, much research has investigated nanocomposites and their properties for the development of energy storage systems. Supercapacitor performance is usually enhanced by use porous electrode structures, which produce a larger surface area reaction. In this work, biocompatible polymer starch medium was used to create nanostructure. Two powders, i.e., Nickel molybdate/reduced graphene oxide (...

The hydrometallurgical treatment of waste printed circuit boards for the recovery precious metals generates acidic wastewater containing nitrate, chloride and residual base metals. scope this work is study a biological process concurrent metal sequestering, nitrate reduction neutralization. A pilot-scale packed-bed biofilm reactor was set up, inoculated with strain H. denitrificans experimental...

In the title compound, [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](OH)(NO(3)), the cationic [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](2+) building units are linked through Ni-O(carboxyl-ate) and Ni-N(amino) bridges into a layer structure. The two independent nickel atoms lie on inversion centres: one adopts an NiO(6) octa-hedral geometry, the other a trans-NiN(2)O(4) octahedral arrangement. The c...

The present study describes the effectiveness of removal of selected aqueous anions by several metalloligs, i.e., metal derivatives of a commercially available immobilized ligand, IMLIG, Octolig. This material consists of polyethylenediamine moieties covalently bound to a high-surface area silica gel (CAS Registry number = 404899-06-5). The metals involved are copper, cobalt, iron, nickel, mang...

In the title compound, [Ni(C(6)H(16)N(2))(2)](NO(3))(2)·H(2)O, the bis-(2,3-dimethyl-butane-2,3-diamine)nickel(II) complex cation possesses a relatively undistorted square-planar geometry about the Ni atom, which lies on an inversion centre and is coordinated by four N atoms from two symmetry-related 2,3-diamino-2,3-dimethyl-butane (tmen) ligands. The amine groups are N-H⋯O hydrogen bonded to t...