A highly sensitive and specific enzyme inhibition assay based on alcohol oxidase (AlOx) and horseradish peroxidase (HRP) for determination of mercury Hg(II) in water samples has been presented. This article describes the optimization and miniaturization of an enzymatic assay using a chemiluminescence reaction. The analytical performance and detection limit for determination of Hg(II) was optimi...

Common complexing ligands such as chloride and sulfate can significantly impact the sorption of Hg(II) to particle surfaces in aqueous environmental systems. To examine the effects of these ligands on Hg(II) sorption to mineral sorbents, macroscopic Hg(II) uptake measurements were conducted at pH 6 and [Hg](i)=0.5 mM on goethite (alpha-FeOOH), gamma-alumina (gamma-Al(2)O(3)), and bayerite (beta...

Optical spectroscopy and reverse-phase HPLC were used to investigate the binding of Hg(II) to plant metal-binding peptides (phytochelatins) with the structure (gammaGlu-Cys)2Gly, (gammaGlu-Cys)3Gly and (gammaGlu-Cys)4Gly. Glutathione-mediated transfer of Hg(II) into phytochelatins and the transfer of the metal ion from one phytochelatin to another was also studied using reverse-phase HPLC. The ...

The applicability of poly(acrylamide) grafted onto cross-linked poly(4-vinyl pyridine) (P4-VP-g-PAm) has been investigated for the separation, preconcentration and speciation of Hg(II) and MeHg(I). In batch experiments, Hg(II) was quantitatively retained (≥95%) in the pH range of 1.0-8.0, whereas the sorption of MeHg(I) was insignificant in the pH range of 1.0-2.0. Freundlich and Langmuir isoth...

Various studies have focused on the performance and removal mechanism of aqueous Hg using biochars, but specific process has not been fully elucidated. Aqua regia digestion is considered a common extraction method from solid samples, uncertainties exist regarding biochars. Aqueous kinetic experiments followed by aqua procedures solid-phase analyses were conducted to investigate diffusion transf...

401-0252-00 U Mathematik II: Analysis II und Lineare Algebra und Systemanalyse I Di 8-10 für Studiengang Agrarwissenschaft bzw. Lebensmittelwissenschaft. Do 9-11 oder Do 15-17 für Studiengang Erdwissenschaften. Do 13-15 für Studiengang Umweltnaturwissenschaften. 2 hrs Tue 08-10 CAB G52 HG E1.2 HG E22 HG E33.3 HG F26.3 Thu 09-11 HG E21 HG E22 13-15 HG D7.2 HG E22 HG F26.5 LFW E13 LFW E15 15-17 H...

Heavy metals cause various health hazards. Using lactic acid bacteria (LAB), we tested the biosorption of heavy metals e.g. cadmium (Cd) (II), lead (Pb) (II), arsenic (As) (III), and mercury (Hg) (II). Cd (II) sorption was tested in 103 strains using atomic absorption spectrophotometery (AAS). Weissella viridescens MYU 205 (1 × 10(8) cells/ml) decreased Cd (II) levels in citrate buffer (pH 6.0)...