-Putrefactive hydrogen sulfide production in the upper 4 cm of sediment in two small freshwater and eutrophic Southeast Michigan, U.S.A., lakes ranged from 0.13 to 1.51 with an average of 0.46 mg S l-~ day-~. Sulfate reductive production of hydrogen sulfide at the same sites ranged from 0.7 to 3.2 with an average of 1.54 mg S 1~ dayt. Putrefactive hydrogen sulfide production represented 5.1-53°...

The uncontrolled release of acid mine drainage (AMD) characterized by elevated concentrations of dissolved metals, high levels of sulfate ions and low pH values threatens the quality of water resources nearby mining areas worldwide. The development of novel technologies based on the precipitation of metals as metal sulfides catalyzed by sulfate reducing bacteria constitute an important method f...

Nitrates and phosphates, found in fertilizers, are the most common eutrophication-causing agents. Douglas fir biochar (BC), a syngas byproduct, was treated with different Al/Mg ratios of sulfate (5% w/w metal loading) followed by an NaOH treatment. The greatest phosphate uptake at 25 °C pH 7 attributed to composite Mg/Al 2:1 ratio prepared 13 (AMBC). Batch AMBC optimized for initial pH, equilib...

maintaining quality and longevity of cut flowers is one of the critical issues in the floriculture industry, especially in cut flowers; and one of the most important problems in chrysanthemum, as one of the most popular cut flowers. therefore, an experiment was conducted based on completely randomized design as pulse treatment with the three factors: tea extracts with 4 levels (5, 10, 20, and 4...

The study included the extraction and purification of glucose oxidase enzyme from Penicillium chrysogenum, pure by precipitation with ammonium sulfate at a saturation rate 70% specific activity in this step reached (10.802) units/mg fold 1.276, was followed dialysis step, 13,593 48.184. Finally, ion exchange chromatography using DEAE-Cellulose column, 19.355 units/mg, 36.59, after which migrate...

The nature of the interaction between dextran sulfate and low density human plasma lipoproteins of the Sr 0 to 10 class (LDL) was investigated by modifying LDL with succinic anhydride or acetic anhydride. In the absence of divalent metal ions, the formation of insoluble and soluble dextran sulfate-LDL complexes was prevented by the acylation of approximately 16% and 25%, respectively, of the LD...

The use of a voltammetric electronic tongue for the quantitative analysis of quality parameters in spring water is proposed here. The electronic voltammetric tongue consisted of a set of four noble electrodes (iridium, rhodium, platinum, and gold) housed inside a stainless steel cylinder. These noble metals have a high durability and are not demanding for maintenance, features required for the ...

BACKGROUND A laboratory study was conducted to investigate the ability of a special type of strongly basic resin MP500WS for the removal of nitrate from different waters. METHODS Two different types of Point-of-Use (POU) devices containing an identical resin were used. MP500WS known as macro porous was used in POU devices for removal of high concentrations of nitrate and sulfate ions from wat...