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Cadmium-enriched sewage sludge application to acid and calcareous soils: relation between treatment, cadmium in saturation extracts, and cadmium uptake

Journal Article · · J. Environ. Qual.; (United States)
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The objective of this study was to determine the effect of soil pH on the availability of saturation-extract Cd. Four acid and four calcareous soils were treated with a uniform amount of sewage sludge enriched with different amounts of CdSO/sub 4/ to yield soil Cd concentrations ranging from 0.1 to 160 ..mu..g Cd/g of sludge-amended soils. These treated soils were placed in plastic containers and cropped for approximately 7 weeks with sweet corn (Zea mays L.), tomato (Lycopersicon esculentum Mill.), and Swiss chard (Beta vulgaris var. cicla). Shoot weights were obtained as a measure of yields. The concentration of Cd in the shoot (Cd uptake) was taken as a measure of Cd availability. Saturation extracts from each treated soil (7 Cd rates x 3 replicates x 8 soils) collected at harvest time were analyzed for pH, EC, principal soluble anions, and cations with Cu, Cd, Ni, and Zn. The chemical analyses of the saturation extracts were used as input data to calculate the concentration of free ionic Cd (Cd/sup 2 +/), the activity of Cd/sup 2 +/, and the concentration of Cd complexes. These Cd parameters, along with the measured concentration of all Cd forms present in saturation extracts, were compared to Cd concentrations in each of the test plants.

Research Organization:
Univ. of California, Riverside
OSTI ID:
5164001
Journal Information:
J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 9:3; ISSN JEVQA
Country of Publication:
United States
Language:
English

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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.
ALKALINE EARTH METAL COMPOUNDS
ANIONS
AVAILABILITY
CADMIUM
CADMIUM COMPLEXES
CADMIUM COMPOUNDS
CADMIUM SULFATES
CALCIUM COMPOUNDS
CATIONS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
COMPLEXES
COPPER
DATA
DATA COMPILATION
DATA FORMS
DISTRIBUTION
ECOLOGICAL CONCENTRATION
ELEMENTS
FOOD
GRASS
INFORMATION
IONS
LAND POLLUTION
METALS
NICKEL
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PLANTS
POLLUTION
SEWAGE
SEWAGE SLUDGE
SOILS
SULFATES
SULFUR COMPOUNDS
TABLES
TOMATOES
TRANSITION ELEMENTS
UPTAKE
VEGETABLES
WASTES
ZINC