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Phytotoxicity and Uptake of Metals Added to Soils as Inorganic Salts or in Sewage Sludge
Author(s) -
Cunningham J. D.,
Keeney D. R.,
Ryan J. A.
Publication year - 1975
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1975.00472425000400040007x
Subject(s) - sewage sludge , phytotoxicity , salt (chemistry) , soil water , chemistry , environmental chemistry , metal , sewage , agronomy , environmental science , environmental engineering , biology , soil science , organic chemistry
Crop growth and metal uptake on soil treated with inorganic salts of Cr, Cu, Zn, and Ni were compared with the results obtained when a sewage sludge was amended with these metals before addition to the soil. This mixture was then ground and added to the soil at the rate of 63 metric tons/ha (2.8%) solids. The treatments involving inorganic salts resulted in lower yields and, in general, higher metal concentrations than the equivalent sludge treatments. Lowest yields were generally observed for the high Zn treatment. These findings indicate that caution must be used when attempting to use results of inorganic salt treatments to evaluate phytotoxity and toxic metal uptake from sewage sludge amended soils.