Assessing Bioavailability of Metals in Biosolids-Treated Soils

A. C. Chang, D. E. Crowley (Autoren)

Buch | Softcover

216 Seiten

2004
IWA Publishing (Verlag)
9781843396796 (ISBN)

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Plant-availability of metals in biosolids-treated soils may be mathematically described by Mt = C x [1 - e- (k x t)] where Mt (mg kg-1) is the cumulative metal removal from the biosolids-treated soils by growing and harvesting plants for t years, C is the total phytoavailable metal pool of the soil (mg kg-1) at t = 0, and k is the metal absorption rate coefficient (yr-1). The total available metal pool, C, is defined as metals extractable by organic acids in the rhizosphere of growing plants and k is related to the kinetics of metal release by organic acids. Half-life of the available metals in biosolids-amended soils may be derived from k.Experiments were conducted to characterize the concentration and composition of the organic acids. A successive extraction method was used to extract metals from biosolids-treated soils for determinging C and k. In this manner, the plant available metals of the biosolids-treated soils are defined by the total available metals, half-life, and duration of plant growing.

Erscheint lt. Verlag	31.7.2004
Reihe/Serie	WERF Research Report Series
Verlagsort	London
Sprache	englisch
Maße	156 x 234 mm
Themenwelt	Technik ► Umwelttechnik / Biotechnologie
ISBN-13	9781843396796 / 9781843396796
Zustand	Neuware