Effects of dissolved humic substances on the speciation of iron and phospate at different pH and ionic strength

Article Abstract:

Sephadex gel filtration can be used to study how dissolved humic substances (DHS) affect the speciation of iron and phosophate where waters have different pH, DHS content and ionic strength, and the results have a useful role to play in predicting primary production in freshwaters. DHS determines the movement of phosphate and iron at the same time to fractions of larger apparent molecular size, with movement falling as pH reduced. The effects of ionic strength, DHS and pH on abiotic changes of phosphate and iron in epilimnetic lake waters are summarised.

Freshwater ecology

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Removal of organic dye (Direct Blue) from synthetic wastewater by adsorptive bubble separation techniques

Article Abstract:

A recent study looked at adsorptive bubble techniques, including ion flotation and adsorbing colloid flotation, as alternative treatments for dye wastewater. The experiments used C.I. Direct Blue 1, an anionic dye, and the results indicated that adsorbing colloid flotation and ion flotation both have potential in removing organic dye from wastewater. Solvent sublation gives similar results to ion flotation, but its performance was not improved by adding paraffin oil. Further tests are required before this technology can be used on an industrial scale.

Water, Water treatment

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Phytoremediation of radiocesium-contaminated soil in the vicinity of Chernobyl, Ukraine

Article Abstract:

Researchers studied various chemicals, and plants to find optimum absorption of cesium from the soil contaminated after the accident at the Chernobyl nuclear power plant. The study began with analyzing the soil in the lab. Then test plots were set up in the contaminated area. Of the chemicals studied, ammonium salts added to the soil produced the highest rate of bioremediation. Amaranth cultivars had the highest cesium accumulation. The conclusions of the study show that some remediation of the soil is possible, but to what extent is uncertain.

Science & research, All Other Basic Inorganic Chemical Manufacturing, Ukraine, Nuclear Wastes, Nuclear industry, Environmental aspects, Cesium, Soil pollution, Radioactive wastes, Chernobyl, Ukraine, Ammonium compounds, Ammonium salts

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