Comparison of Three Digestion Methods For the Recovery of 17 Plant Essential Nutrients And Trace Elements from Six Composts
- 1 June 2002
- journal article
- research article
- Published by Informa UK Limited in Compost Science & Utilization
- Vol. 10 (3), 197-203
- https://doi.org/10.1080/1065657x.2002.10702081
Abstract
A comparative investigation for recovery of 17 elements by using three digestion methods (nitric acid, nitric/perchloric acid and dry ashing) in six mature composts was conducted. The elements measured were Ca, Fe, K, Mg, Na, As, Cd, Co, Cr, Cu, Hg, Mn, Mo, Ni, Pb, Se and Zn. Two of the composts were prepared from mixtures of racetrack manure and sewage sludge. Another compost was developed from a mixture of food waste and straw with the addition of nitrogen fertilizer. The remaining three were MSW (municipal solid waste) composts from the Lunenburg Regional Recycling and Composting Facility, Nova Scotia, prepared in 1995, 1996 and 1997, matured, and used in the subsequent year. There were no significant differences between the three digestion procedures in the recovery of Ca, K, Na, and Hg. HNO3 digestion provided the highest recovery of As, Mo, Ni and Se, HNO3/HClO4 provided the highest recovery of Co, while dry ashing provided the highest recovery of Mn. For Cd and Pb, both HNO3 and HNO3/HClO4 provided similar and better recovery than dry ashing. For Cr, higher values were obtained by using dry ashing or HNO3/HClO4 digestion, while for Mg, HNO3 and dry ashing provided similar and better recovery than the HNO3/HClO4 digestion procedure. For Cu and Zn, HNO3 was superior to HNO3/HClO4 digestion, while dry ashing was not significantly different from the other two procedures. For Fe, dry ashing provided better recovery than HNO3. Element recovery depended not only on the digestion procedure, but also on the type of compost. Overnight presoaking of the compost samples in concentrated nitric acid at room temperature prior to heating did not improve the element recovery. The results show that when comparing the three methods, nitric acid digestion is sufficient for the recovery of the greatest number of elements in various composts.Keywords
This publication has 29 references indexed in Scilit:
- Comparison of Four USEPA Digestion Methods for Trace Metal Analysis Using Certified and Florida SoilsJournal of Environmental Quality, 1998
- Microwave assisted soil and waste dissolution for estimation of total phosphorusCommunications in Soil Science and Plant Analysis, 1998
- Trace elemental characterization of composted poultry manureBioresource Technology, 1996
- Comparison of methods to evaluate heavy metals in organic wastesCommunications in Soil Science and Plant Analysis, 1996
- Comparison of Different Washing, Ashing, and Digestion Methods for the Analysis of Trace Elements in VegetationInternational Journal of Environmental Analytical Chemistry, 1994
- Silver uptake byAgaricus bisporus from an artificially enriched substrateZeitschrift für Lebensmittel-Untersuchung und Forschung, 1994
- Total and extractable copper and zinc as assessors of phytotoxicity in soilless potting mediaCommunications in Soil Science and Plant Analysis, 1994
- Recycling of Cattle Manure: The Composting Process and Characterization of MaturityJournal of Environmental Quality, 1993
- Agronomic value of urban waste and the growth of ryegrass (Lolium perenne) in a calciorthid soil amended with this wasteJournal of the Science of Food and Agriculture, 1991
- Comparison of Methods for Preparation of Municipal Compost for Analysis of Metals by Atomic Absorption SpectrophotometryInternational Journal of Environmental Analytical Chemistry, 1982