Toxicity Evaluation of Weathered Coal Fly Ash–Amended Manure Compost

Toxicity Evaluation of Weathered Coal Fly Ash–Amended Manure Compost The general use of manure compost is limited by its residualtoxicity, and hence a study was performed to evaluate the use ofweathered coal fly ash (lagoon ash) to alleviate the toxicity ofmanure compost. Mature and immature manure compost were amendedwith lagoon ash at 0, 5, 10 and 20% (w/w dry weight basis), andtheir phyto-toxicity was evaluated by germination and root lengthgrowth of lettuce seed. The immature manure compost hadsignificantly higher contents of NH4-N, PO4-P, andacid- and water-extractable Cu and Zn contents than those of mature manure compost. Ash amendment caused asignificant increase in electrical conductivity (EC), but adecrease in NH4-N, PO4-P, and DTPA-, CaCl2- andwater-extractable Cd, Cu, Pb and Zn contents of both manurecompost. Addition of lagoon ash at a rate of 5% for immaturemanure compost and 10% for mature manure compost resulted in ahigher seed germination rate and root length growth. Thegermination index demonstrated significant negative correlationswith EC, NH4-N and DTPA extractable Cd, Cu, Pb and Zncontents. The present study supports the use of lagoon ash foramending manure compost to reduce the availability of traceelements and NH4-N. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water, Air, Soil Pollution Springer Journals

Toxicity Evaluation of Weathered Coal Fly Ash–Amended Manure Compost

Water, Air, Soil Pollution, Volume 128 (4) – Oct 4, 2004

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Publisher
Springer Journals
Copyright
Copyright © 2001 by Kluwer Academic Publishers
Subject
Environment; Hydrogeology; Atmospheric Protection/Air Quality Control/Air Pollution
ISSN
0049-6979
eISSN
1573-2932
D.O.I.
10.1023/A:1010332618627
Publisher site
See Article on Publisher Site

Abstract

The general use of manure compost is limited by its residualtoxicity, and hence a study was performed to evaluate the use ofweathered coal fly ash (lagoon ash) to alleviate the toxicity ofmanure compost. Mature and immature manure compost were amendedwith lagoon ash at 0, 5, 10 and 20% (w/w dry weight basis), andtheir phyto-toxicity was evaluated by germination and root lengthgrowth of lettuce seed. The immature manure compost hadsignificantly higher contents of NH4-N, PO4-P, andacid- and water-extractable Cu and Zn contents than those of mature manure compost. Ash amendment caused asignificant increase in electrical conductivity (EC), but adecrease in NH4-N, PO4-P, and DTPA-, CaCl2- andwater-extractable Cd, Cu, Pb and Zn contents of both manurecompost. Addition of lagoon ash at a rate of 5% for immaturemanure compost and 10% for mature manure compost resulted in ahigher seed germination rate and root length growth. Thegermination index demonstrated significant negative correlationswith EC, NH4-N and DTPA extractable Cd, Cu, Pb and Zncontents. The present study supports the use of lagoon ash foramending manure compost to reduce the availability of traceelements and NH4-N.

Journal

Water, Air, Soil PollutionSpringer Journals

Published: Oct 4, 2004

References

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