Schwermetallgehalte im Kultursubstrat und Erntegut des Champignons, Agaricus bisporus (Lange) Singer, beim Einsatz von Müllklärschlammkompost

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Abstract
Heavy metal contents in the culture substrate and in the mushroom, Agaricus bisporus, grown in composts mixed with municipal waste and sewageThe addition of increasing quantities of municipal waste compost to conventional horse manure compost resulted in a proportional increase in the heavy metal content of the mixture. The increases ranged between 250% (zinc) and 900% (mercury).Ninety‐four to ninety‐nine percent of the heavy metals in municipal waste compost are bound in compounds from which they can not be extracted using CaCl2 solution. The amounts extractable from horse manure compost with CaCl22 solution are from 1.5 (zinc)‐ to 33 (mercury)‐times higher.The influences of the increasing quantities of heavy metals in municipal waste — horse manure composts are demonstrable in the content of these metals in harvested mushroom. This, in turn, corresponds to the availability of the metals. The relative enrichment is greatest with mercury, and least with cadmium. The quantities found in mushrooms, with the exception of mercury, fall within the normal range detected in vegetable crops.

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