A video course on soil pollution

Agriculture and soil. Pollution control, soil remediation, humus and new agricultural techniques.
Dearcham
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A video course on soil pollution




by Dearcham » 18/03/04, 10:03

Soil pollution

The problem of polluted soils is not popular with the general public because the origins of pollution can be diverse and have only a little perceptible impact on health. Because of their importance in the production of food and vegetation, we will focus on the pollution of agricultural soils and correlate structure and soil fertility. To illustrate the point, we will present the impact of the acidification of a complex medium, consisting of alumina powder or clay and natural organic substances, on the modification of the structure of the systems and will give an interpretation based on on the phenomena responsible for ion transfer within the organic layer at the surface of the oxide or clay. We will describe the mechanisms responsible for the dispersion of aggregates in acidic medium. An examination of both systems will help to explain the difficulty of restructuring simple polluted systems. We can imagine the difficulty of giving life and fertility to polluted soil as the physico-chemical nature of the soil is extremely complex. Finally, we will give an example where the addition of organic matter to irrigation water enhances soil cohesion.

Here is a small summary of what you will find on this excellent site gathering an impressive number of courses-conferences realized by specialists. 36 videos on ecology, go especially to see the http://www.canal-u.education.fr/
video-course of Mr PEFFERKORN regarding soils
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Knut
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by Knut » 02/06/06, 02:57

The depollution of the soil costs a fortune collossale with the insurance ...

We are trying more and more bacteriological or microbial depollutions.


brambles and nettles would be depolluting ....

and one of my suppliers told me that the zinc and cadmium pollution was being treated with a plant, Hyperaccumularice Thlaspi Caerulescens, which must be incinerated after harvest.

I do not know what she looks like .... never seen!
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denis
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A video course on soil pollution




by denis » 02/06/06, 09:34

for the video is a joke ???
Knut, to incinerate these plants, it's good, but the ashes do you what? Do you use fertilizer? :D
for once, it must be rich in trace elements : Cheesy:
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Knut
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by Knut » 02/06/06, 11:19

It is a pollution control company that I intervene in the event of a disaster, which does so.
I think the heavy vices are receuilis in the ashes, that's what I understood.


So they scollect the plants and cremate them and get paid for them.
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Knut
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by Knut » 02/06/06, 11:21

Whatever the depollution, do not dream, it's stokage!

Catalytic converters, what do you think we're doing?
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rpsantina
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by rpsantina » 02/06/06, 17:37

Knut wrote:...

We are trying more and more bacteriological or microbial depollutions.


brambles and nettles would be depolluting ....

and one of my suppliers told me that the zinc and cadmium pollution was being treated with a plant, Hyperaccumularice Thlaspi Caerulescens, which must be incinerated after harvest.

...


I confirm that I have read more where the plants were able to modify the structure of the soil. In addition heavy metals would not be stored but would change to something else ( : Shock: Long live the alchemy of plants : Shock: ) I can not get my hands on the docs, but phyto-remediation of the soil is not SF but it is very long. 10 to 15 years to "clean" an industrial site.
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RPS (Dpt Tarn South 81)
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ii-Anything is possible as long as a little time is spent there
Knut
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by Knut » 02/06/06, 23:37

In any case, it allows me to significantly reduce the financial weight of a file, while having a much better result.

It is checked, by sampling obviously, before, during and after work.
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Christine
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by Christine » 03/06/06, 17:44

knut wrote: that pollution by zinc and cadnium was treated with a plant, Hyperaccumularice Thlaspi Caerulescens, which must be incinerated after harvest.


"Thlaspi caerulescens (Figure 3) has been particularly studied for its ability to accumulate cadmium and zinc in its aerial parts. Zinc is stored mainly in vacuoles. Its concentration in tissues can reach up to 3% of the dry weight. (Brooks, 1998) and that of 0.01% cadmium (Zhao & al, 2002). The latter is stored in the apoplasm, i.e. outside cell membranes. For these properties, Thlaspi caerulescens is of great interest in the context of phytoremediation, cleaning contaminated soils, because it is one of the only plants known to hyperaccumulate cadmium, but the precise mechanisms of absorption are not yet fully understood.

At the same time as its great capacity of accumulation, Thlaspi caerulescens is able to tolerate contaminated soils. This tolerance to heavy metals, allows it to grow on soils where the concentration of metals is toxic for other plants. "

Image
link: http://www.petzi.org/thlaspi/
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Knut
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by Knut » 03/06/06, 22:47

Ah, that you know some things : Cheesy:
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