Residual effects of sewage sludge on soybean: I. Accumulation of heavy metals

J. R. Heckman, J. S. Angle, R. L. Chaney

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

The concentrations of metals in soybean shoots at the R4 growth stage varied according to sludge type, application rate, and soil pH. Metal uptake from low metal, limed sludges was similar to that of controls. Metal uptake was, however, increased by unlimed sludges that were high in metal content. Digested sludge linearly increased shoot metal concentrations of Zn, Cd, Cu, and Ni. Compared to the unamended control, soybean Zn increased from 24 to 165 mg kg** minus **1 and Cd increased from 0. 06 to 0. 25 mg kg** minus **1 at the 112 Mg ha** minus **1 rate. The shoot Cd concentration was over seven times higher from Cd rich Nu-Earth sludge as compared to the other sludges. Shoot Zn and Cd concentrations exhibited significant linear and quadratic relationships with rates of heat-treated and Nu-Earth sludge. Results indicate that sludge composition and soil pH can have a substantial influence on soybean metal uptake for at least 9 yr after the initial sludge application.

Original languageEnglish (US)
Pages (from-to)113-117
Number of pages5
JournalJournal of Environmental Quality
Volume16
Issue number2
DOIs
StatePublished - 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law

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