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| DOI: | 10.21273/JASHS.122.6.792 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/122/6/article-p792.xml?rskey=Rw29ON
Last checked: 11/14/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Bubenheim, David;
Wignarajah, Kanapathipillai;
Berry, Wade;
Wydeven, Theodore |
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| Author Affiliation: | Bubenheim: National Aeronautics and Space Administration, Ames Research Center, Advanced Life Support Division, Regenerative Systems Branch, Moffett Field, CA; Wignarajah and Wydeven: The Bionetics Corp.; and Berry: University of California, Los Angeles, CA |
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| Title: | Phytotoxic effects of gray water due to surfactants |
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| Section: | Environmental stress physiology
Other records with the "Environmental stress physiology" Section
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| Source: | Journal of the American Society for Horticultural Science. Vol. 122, No. 6, November 1997, p. 792-796. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Phytotoxicity; Greywater; Surfactants; Effluent water; Recycling; Drought management; Ecology; Toxicity; Fatty acids
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| Abstract/Contents: | "Recycling wastewater containing soaps and detergents for plant growth is highly desirable when fresh water is limited. This is especially true during times of drought and is imperative in some specialized situations such as a regenerative space habitat. To regenerate food, water, and air, the National Aeronautics and Space Administration's Controlled Ecological Life Support System (CELSS) must recycle wastewater commonly known as gray water. The anionic surfactant Igepon is the principal ingredient of many detergent formulations and soaps and is a prime candidate for use in a space habitat. To determine if gray water would have phytotoxic effects on crops grown in a CELSS, 'Waldmann's Green' lettuce (Lactuca sativa L.) was grown in nutrient solutions containing varying concentrations of Igepon TC-42. Igepon concentrations of 250 mg·L⁻¹ or higher in nutrient solutions resulted in phytotoxic effects in lettuce. Thus, the toxic threshold of Igepon is <250 mg·L⁻¹. Toxicity symptoms include browning of the roots within 4 hours of exposure to Igepon followed by suppression of root dry mass within 24 hours. Plant death never resulted from exposure to Igepon used in these experiments, although roots were killed. The phytotoxic effect of Igepon was not persistent; plants initially displaying acute toxicity show clear signs of recovery within 3 days of initial exposure. Further, when fresh plants were exposed to these same nutrient solutions 3 days or more following initial Igepon addition, no phytotoxic effect was observed. The elimination of the phytotoxicity was associated with a decrease in fatty acid components in the nutrient solution associated with Igepon. The degradation of phytotoxicity appears to be associated with microbes peresent on the surface of the roots and not directly due to any plant process or instability of the surfactant." |
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| Language: | English |
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| References: | 18 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bubenheim, D., K. Wignarajah, W. Berry, and T. Wydeven. 1997. Phytotoxic effects of gray water due to surfactants. J. Am. Soc. Hortic. Sci. 122(6):p. 792-796. |
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| DOI: 10.21273/JASHS.122.6.792 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/122/6/article-p792.xml?rskey=Rw29ON
Last checked: 11/14/2019
Requires: PDF Reader |
| 
MSU catalog number: SB 1 .A46 |
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