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ERIC Number: EJ878828
Record Type: Journal
Publication Date: 2010
Pages: 5
Abstractor: As Provided
Reference Count: 20
ISSN: ISSN-1059-9053
Wastewater Phosphorus Removal by Two Different Types of Andesitic Volcanic Tephra
Liesch, Amanda M.
Journal of Natural Resources and Life Sciences Education, v39 p40-44 2010
Phosphorus (P) is the limiting nutrient controlling productivity in most inland freshwater systems. Several materials have been proposed for use to remove excess P from wastewater treatment, including volcanic lapilli and ash (tephra). There is limited data in using tephra as a P filter. There were two objectives of this study: (1) to determine the physical feasibility of tephra as a filter making sure the infiltration rate remains high enough to use under prolonged saturation, and (2) to test the suitability of volcanic tephra as a medium for removing P from an artificial solution on two different volcanic tephra materials: Okato and Papakai tephra. The experiment used a synthetic P influent solution (20.5 mg P/L) and a solution residence time in the columns of approximately 3 hours. By the end of the experiment infiltration in both tephras was adequate for use in wastewater treatment systems. The Okato tephra absorbed nearly 8 mg P/g tephra with 97% of the total amount of P added to the column over a 54 day period. The Papakai tephra absorbed only 4 mg P/g with a 52% of the total P added to the column. (Contains 1 table and 3 figures.)
American Society of Agronomy. 677 South Segoe Road, Madison, WI 53711. Tel: 608-273-8080; Fax: 608-273-2021; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A