Cadmium-enriched sewage sludge application to acid and calcareous soils: relation between treatment, cadmium in saturation extracts, and cadmium uptake
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), Vol. 9:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CADMIUM
ECOLOGICAL CONCENTRATION
UPTAKE
ANIONS
AVAILABILITY
CADMIUM COMPLEXES
CADMIUM COMPOUNDS
CADMIUM SULFATES
CALCIUM COMPOUNDS
CATIONS
COMPARATIVE EVALUATIONS
COPPER
DATA COMPILATION
DISTRIBUTION
GRASS
LAND POLLUTION
NICKEL
PH VALUE
PLANTS
SEWAGE SLUDGE
SOILS
TABLES
TOMATOES
VEGETABLES
ZINC
ALKALINE EARTH METAL COMPOUNDS
CHARGED PARTICLES
COMPLEXES
DATA
DATA FORMS
ELEMENTS
FOOD
INFORMATION
IONS
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
POLLUTION
SEWAGE
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENTS
WASTES
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)
560303 - Chemicals Metabolism & Toxicology- Plants- (-1987)