We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Toxicity Evaluation of Weathered Coal Fly Ash–Amended Manure Compost.
- Authors
Lau, S. S. S.; Wong, J. W. C.
- Abstract
The general use of manure compost is limited by its residual toxicity, and hence a study was performed to evaluate the use of weathered coal fly ash (lagoon ash) to alleviate the toxicity of manure compost. Mature and immature manure compost were amended with lagoon ash at 0, 5, 10 and 20% (w/w dry weight basis), and their phyto-toxicity was evaluated by germination and root length growth of lettuce seed. The immature manure compost had significantly higher contents of NH4-N, PO4-P, and acid- and water-extractable Cu and Zn contents than those of mature manure compost. Ash amendment caused a significant increase in electrical conductivity (EC), but a decrease in NH4-N, PO4-P, and DTPA-, CaCl2- and water-extractable Cd, Cu, Pb and Zn contents of both manure compost. Addition of lagoon ash at a rate of 5% for immature manure compost and 10% for mature manure compost resulted in a higher seed germination rate and root length growth. The germination index demonstrated significant negative correlations with EC, NH4-N and DTPA extractable Cd, Cu, Pb and Zn contents. The present study supports the use of lagoon ash for amending manure compost to reduce the availability of trace elements and NH4-N.
- Subjects
COAL-weathering; AIR pollution; FLY ash; TOXICITY testing; AIR quality; COALING
- Publication
Water, Air & Soil Pollution, 2001, Vol 128, Issue 3-4, p243
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/A:1010332618627