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Wiki Education Foundation-supported course assignment

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This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Rachel ison. Peer reviewers: Mabollin.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 06:38, 17 January 2022 (UTC)[reply]

Hyperaccumulators:Perchlorate

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Would anyone be willing to look at perchlorate as hyperaccumulator in the green leafy vegetation that typically makes up the salad bowls of America. A study by the FDA (item 9) http://www.cfsan.fda.gov/~dms/clo4qa.html

Has FDA found perchlorate in lettuce?

Lettuce samples were collected at the grower or packing shed. For sample analysis, outermost leaves of each lettuce head were removed, similar to the actions typically taken by a consumer prior to consumption. Among 128 lettuce samples tested, perchlorate levels ranging from levels below the limit of quantitation to 71.6 ppb (part per billion), with a mean of 7.76 ppb, were found in iceberg lettuce; levels of 1.00 to 27.4 ppb, with a mean of 10.7 ppb, were found in green leaf lettuce; levels below the limit of quantitation to 52.0 ppb, with a mean of 11.6 ppb, were found in red leaf lettuce; and levels below the limit of quantitation to 129 ppb, with a mean of 11.9 ppb, were found in romaine lettuce.

EWG is recommending a 0.5 ppb public health goal for drinking water and the levels found in this study are significantly higher than what would be acceptable in water.

Perchlorate attacks the thyroid. http://www.ewg.org/reports/thyroidthreat/execsumm.php

The risk groups of concern are woman and children, pregnant women, and specifically pregnant vegetarian women. They are at higher risk as they tend to eat non commercial foods and therefore have a lower sodium uptake. This also translates to a lower iodine uptake and potential thyroid issues. This is a developing story that will likely become big in the next couple years. The source of the perchlorate in the soil is likely a Chilean guano based fertilizer (over 39 million tones were imported since 1939) that became the top soil in the Salinas and Imperial valleys where the bulk of the salad of America is grown.

If anyone has any info or has a university contact that would be willing to look into this I'd appreciate a comment line. 

FOK SD OA 22:50, 8 January 2007 (UTC)[reply]


phytoremediation:salts

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Have there been any studies involving phytoremediation of salt/saline from soils and/or saltwater? I am interested in conducting such a study and i have been unable to find any previous studies thus far. please post anything helpful in response. thank you.

C.P. Martin


try these articles: 

Qadir M, Ghafoor A, Murtaza G

Use of saline-sodic waters through phytoremediation of calcareous saline-sodic soils AGRICULTURAL WATER MANAGEMENT 50 (3): 197-210 SEP 20 2001


Qadir M, Oster JD Vegetative bioremediation of calcareous sodic soils: history, mechanisms, and evaluation IRRIGATION SCIENCE 21 (3): 91-101 JUN 2002


. Qadir M, Qureshi RH, Ahmad N Amelioration of calcareous saline sodic soils through phytoremediation and chemical strategies SOIL USE AND MANAGEMENT 18 (4): 381-385 DEC 2002 


Qadir M, Steffens D, Yan F, et al.

Sodium removal from a calcareous saline-sodic soil through leaching and plant uptake during phytoremediation LAND DEGRADATION & DEVELOPMENT 14 (3): 301-307 MAY-JUN 2003


goodluck, shira

Hyperaccumulators

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Hyperaccumulators I am interested in learning more about plants as hyperaccumulators for removing metals and other toxins from soils. How does this work- does the plant hold the metal/toxin in the root? in the leaf? And once in the plant- what does one do with the plant which now has the toxin in it? And what is the make-up of some plants which make them work for some metal removals, while other plants will not work? Lastly- how does one find a list of plants which have successfully removed spefic metals or other toxins? Thanks Stevie Famulari



abt phtyoremediation

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does phytoremediatio cause any harmto the characterstic of the plant? or it will lead toany genetic change in the plant? —Preceding unsigned comment added by 125.62.99.87 (talk) 05:47, 9 October 2008 (UTC)[reply]

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The external link to the International Journal of Phytoremediation leads to a 404 page. —Preceding unsigned comment added by 87.127.196.184 (talk) 19:01, 18 April 2009 (UTC)[reply]

fixed Osulemur (talk) 04:42, 8 December 2009 (UTC)[reply]


Dating

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Reference is made to the 'past twenty years': as the discussion is a number of years old, a 'date or decade' would be useful. Jackiespeel (talk) 21:52, 10 December 2011 (UTC)[reply]

Hemp / Cannabis

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...1998, Phytotech, along with Consolidated Growers and Processors (CGP) and the Ukraine's Institute of Bast Crops, planted industrial hemp, Cannabis sp., for the purpose of removing contaminants near the Chernobyl site. http://www.mhhe.com/biosci/pae/botany/botany_map/articles/article_10.html

and http://www.botanicalgarden.ubc.ca/education/courses/phytoremediation-and-industrial-hemp.php — Preceding unsigned comment added by 91.88.6.194 (talk) 21:38, 7 March 2012 (UTC)[reply]

Phytoremediation of the atmosphere?

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Given that plants also modify and cleanse the atmosphere, it seems strange to mention that, and then deny it? See 'Advantages and limitations' section: 'Limitations: 'phytoremediation is limited to the surface area and depth occupied by the roots.'--5.150.92.174 (talk) 12:53, 17 October 2015 (UTC)[reply]

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Phytoextraction

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Could there be more discussion about how the makeup of the soil affects the efficiency of contaminant uptake by the plants? Some contaminants are more or less mobile depending on the soil chemistry that could alter the efficacy of phytoremediation. Rachel ison (talk) 23:08, 1 February 2018 (UTC)[reply]

Timeline for Phytoremediation

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I plan to include further information about the different factors that determine how long it takes for soils to be cleaned through phytoremediation. Two factors are the amount of biomass production and the metal bioconcentration factor. Also include discussion about how genetically modified plants are being bred to accumulate more contaminants to help speed up the process. Rachel ison (talk) 22:29, 1 March 2018 (UTC)[reply]

Wiki Education assignment: Applied Plant Ecology Winter 2022

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This article was the subject of a Wiki Education Foundation-supported course assignment, between 10 January 2022 and 23 April 2022. Further details are available on the course page. Student editor(s): Sd1313 (article contribs).

Wiki Education assignment: Applied Plant Ecology Winter 2024

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This article was the subject of a Wiki Education Foundation-supported course assignment, between 8 January 2024 and 20 April 2024. Further details are available on the course page. Student editor(s): Phalaenopsisaphrodite (article contribs).

— Assignment last updated by Warmedforbs (talk) 01:24, 18 April 2024 (UTC)[reply]

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