Re: [DIYbio] Phytoremediation of Lead Polluted Soils

Aim for a low sodium content. EDTA is commonly sold as a tetrasodium salt, but you can get disodium or maybe less. Don't want to salt the earth, after all! Come to that, you might find an alternate salt like calcium or potassium if you look; much better!

Avery louie <inactive.e@gmail.com> wrote:

>EDTA is a pretty commonly used buffer, and can probably be purchased
>from
>carolina biological. Just order online.
>
>--Avery
>
>On Tue, May 8, 2012 at 9:36 AM, Nathaniel Page
><nathanielpage@gmail.com>wrote:
>
>> I have this little science fair project in mind in which I hope to
>clean
>> up some lead pollution in my friend's back yard with mustard plants.
>This
>> is a little spot of ground about 20'x20' in Clinton Hill, Brooklyn.
>The
>> soil has been tested and found to contain pretty high levels of lead
>(not
>> sure on the exact numbers), probably from paint.
>>
>> From my initial research, it looks like I will need to apply
>fertilizers
>> and a chelating agent to the soil to help the mustard plants pick up
>the
>> lead. It looks like the chelate I'll need is
>Ethylenediaminetetraacetic
>> acid. This is where my expertise runs out, though. I'm hoping someone
>who
>> is familiar with these agents may be able to talk to me briefly by
>phone
>> about the application process. My main questions are: How much EDTA
>do I
>> need to apply, and in what is the application medium, and what is the
>> application timing? And is there a certain form in which I should buy
>my
>> EDTA?
>>
>> Thanks.
>>
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