Solubility and plant uptake of cadmium in soils amended with cadmium and sewage sludge

Journal Article · Sat Jan 01 04:00:00 EST 1977 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1977.00472425000600010016x· OSTI ID:7211867

Street, J J; Lindsay, W L; Sabey, B R

Adsorption and precipitation of Cd/sup 2 +/ in soil suspensions were investigated as possible factors controlling Cd/sup 2 +/ levels in soils. Both adsorption of Cd/sup 2 +/ onto soils surfaces and possibly precipitation of cadmium minerals were evident in this study. At low cadmium levels solubility relationships in soils are best described by adsorption and fit the empirical Freundlich adsorption isotherm. Based on current thermodynamic data the solid phases CdCO/sub 3/ and Cd/sub 3/(PO/sub 4/)/sub 2/ most likely limit Cd/sup 2 +/ activities in soils. Under alkaline conditions, Cd/sup 2 +/ activity decreased approximately 100-fold for each unit increase in pH. CdCO/sub 3/ precipitated in sandy soils having low cation exchange capacity (CEC), low organic matter, and pH values >7.0. DTPA-extractable cadmium levels in soils were highly correlated (r = 0.96) with Cd concentrations in corn (Zea mays L.) seedlings grown in soils amended with Cd solutions, sewage sludge, or Cd-spiked sewage sludge. Increasing Cd additions to the soil increased plant Cd regardless of the form of Cd added. Addition of inorganic Cd to the soil increased the Cd concentration of corn seedlings more than equivalent Cd additions in the form of sewage sludge or Cd-spiked sludge.

• Research Organization: Colorado State Univ., Ft. Collins
• OSTI ID: 7211867
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 6:1; 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.
ADSORPTION
AMINO ACIDS
BIOMASS
CADMIUM
CADMIUM CARBONATES
CADMIUM COMPOUNDS
CADMIUM PHOSPHATES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CATIONS
CEREALS
CHARGED PARTICLES
CHELATING AGENTS
CORRELATIONS
DISPERSIONS
DTPA
ELEMENTS
ENERGY SOURCES
GRAMINEAE
GRASS
ION EXCHANGE
IONS
MAIZE
METALS
MINERALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PHOSPHATES
PHOSPHORUS COMPOUNDS
PLANTS
PRECIPITATION
QUANTITY RATIO
RENEWABLE ENERGY SOURCES
SAND
SEEDLINGS
SEPARATION PROCESSES
SEWAGE
SEWAGE SLUDGE
SOILS
SOLUBILITY
SORPTION
SUSPENSIONS
THERMODYNAMICS
UPTAKE
WASTE PRODUCT UTILIZATION
WASTES