Assessing Bioavailability of Metals in Biosolids-Treated Soils (eBook)

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

eBook Download: PDF

2004
206 Seiten
IWA Publishing (Verlag)
978-1-78040-412-7 (ISBN)

Infos

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.

Produkt-Details

• Erscheint lt. Verlag: 31.7.2004
• Sprache: englisch
• Themenwelt: Naturwissenschaften
• Themenwelt: Technik ► Bergbau
• Themenwelt: Technik ► Umwelttechnik / Biotechnologie
• ISBN-10: 1-78040-412-3 / 1780404123
• ISBN-13: 978-1-78040-412-7 / 9781780404127