Sequential extraction of soil heavy metals following a sludge application

Journal Article · · J. Environ. Qual.; (United States)

OSTI ID:6896406

Chang, A C; Page, A L; Warneke, J E; Grgurevic, E

Two soils treated with a composted sludge and two liquid sludges annually for 7 consecutive years and cropped to barley (Hordeum vulgare L.) each year were sampled at 4-week intervals following planting in 1981. The soils were Greenfield sandy loam and Domino loam. Barley tissue samples were also obtained at the time of each soil sampling. Soils were fractionated with a sequential extraction procedure to determine the distribution of solid-phase chemical forms of the sludge-borne heavy metals. In untreated soils, essentially all of the heavy metals were present in either the sulfide-residue form (for Cr, Cu, Ni, and Zn) or the carbonate form (for Cd and Pb). With sludge treatment, every extracted fraction showed increases in the amounts of heavy metals. However, the most significant increases occurred in the carbonate fraction. The Cd and Zn concentrations in barley grown in the sludge-treated soil were consistently higher than those in the nonsludged control. The rate of Cd and Zn uptake was rapid during early stages of plant growth. However, the rate of Cd and Zn uptake by barley progressively decreased with plant development. As a result, the part of the plant growth (e.g., the barley grain) always contained less Cd and Zn than those that developed earlier. Since the precentage of Cd and Zn in each extracted fraction did not change appreciably throughout the growing season, the differential Cd and Zn uptake by barley with plant development cannot be related to the chemical transformation of solid-phase heavy metals in the soil during the growing season.

• Research Organization: Univ. of California, Riverside
• OSTI ID: 6896406
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 13:1; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303 -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BARLEY
BUILDUP
CADMIUM
CEREALS
CHEMICAL ANALYSIS
CHEMISTRY
CHROMIUM
COPPER
DATA
ELEMENTS
EXPERIMENTAL DATA
GRAMINEAE
GRASS
GROUND DISPOSAL
INFORMATION
LEAD
MANAGEMENT
METALS
NICKEL
NUMERICAL DATA
PLANTS
SEWAGE
SEWAGE SLUDGE
SLUDGES
SOIL CHEMISTRY
SOILS
TRANSITION ELEMENTS
UPTAKE
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PRODUCT UTILIZATION
WASTES
ZINC