Hello everybody,
I would like to know if there is literature about the effect of plant density on phytoremediation. Especialy i am interested in Ni hyperaccumulation by the genus Alyssum but any other case would be helpfull.
Thank you very much in advance
George
I am not sure weather if you have already consulted this paper "Ali, Hazrat, Ezzat Khan, and Muhammad Anwar Sajad. "Phytoremediation of heavy metals—concepts and applications." Chemosphere 91.7 (2013): 869-881" . Thanks
Maybe these papers can be useful:
Bani et al. 2015. The effect of plant density in nickel phytomining field experiments with Alyssum murale in Albania
Li et al. 2003. Development of a technology for commercial phytoextraction of nickel:
economic and technical considerations
Best regards
I should think that in addition to the density of a plant, one must also regard the capillary action in a plant. Of course the grass-oriented plants are quite different from the trees.
In the history of the lack of discovery in the rice eaten by Japanese people located downstream of a river where a smelting factory had discharged wastewater which contained Cadmium caused "Au-Au"painful disease at first in the women because the Cadmium ions replaced the Calcium ions in their bones.
The disease got started during the war when Japanese military needed lead and iron and other metals at all cost. But the cadmium ions were absorbed by the rice plant due mainly to capillary action from the roots. It was conjectured by mistake by many so-called experts at first saying that it was some other reasons that had caused that disease. Then an analytical chemist saw his aunt died of this painful death and took a sample of her ashes after cremation for analysis. The content of Cadmium in her bones prooved to be fatal. That was several years after WWII.
Similar contamination of Cadmium was later found in central part of Taiwan that made a large amount of farmland no longer allowed to plant rice.
Right now I am sorry to say that in Hunan province, China, downstream from the "7 Treasures" mountain many heavy metals have been discharged into the river. Some of the rice produced from Hunan province and got to the market in Guangdong and in Hong Kong were found to contain Cadmium!
The No.1 politician in a Town meeting of Hunan laughingly told the reporters that a little bit more lead ions found in the drinking water was no problem because the school children were licking their lead pencils all the time anyway. Later he was corrected by a reporter that the "lead" pencils today no longer contain lead. Instead they now contain carbon as graphite! So that politician did not laugh any more.
I should think that the density in the rice plant stalk ought to be low. But the capillary action through the stalk is quite high. Has anyone tried to test for the capillary action in different plants being considered for Phytoremediation?
Good luck!
Eugene Lo Wei
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