Reduction of Cr(VI) to Cr(III) by wetland plants: potential for in situ heavy metal detoxification

Article Abstract:

The decrease of heavy metals in situ by plants can be a potential detoxification mechanism for phytoremediation. Water hyacinth, for example, has been found to be an effective in the detoxification of Cr(VI) contaminated wastestreams as the plant effectively converts Cr(VI) to Cr(III). X-ray spectroscopy results show that root and shoot tissues accumulated nontoxic Cr(III) with Cr(VI) reduction appearing to take place in the fine lateral roots. Water hyacinth is a potentially effective means of bioremediation as the whole plant can be harvested easily.

Comment:

Decrease of heavy metals in situ by plants can be a potential detoxification mechanism for phytoremediation

United States, Science & research, Article

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Transport of mercury in three contrasting river basins

Article Abstract:

Evaluation of total mercury (Hg) loadings and concentrations in Minnesota, Mississippi and St. Croix rivers reveals that watershed characteristics play an important role in Hg mobility. The study reveals that Hg levels in the Minnesota river are strongly correlated with total suspended solid concentrations while the Mississippi and St. Croix rivers have lower loadings and concentrations of Hg reflecting higher levels of dissolved mercury.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Mercury, Research, Environmental aspects, Pollution, Water pollution, Mercury (Metal), Watersheds, Mercury compounds

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