What question did this study set out to answer?

To determine the chemical distribution and mobility of heavy metals in soil profiles amended with sewage sludge following extended water leaching.

April 1, 1982Journal of Environmental Quality

Solid Phase Forms of Heavy Metals in Sewage Sludge‐Treated Soils

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Authors

WEWilliam E. EmmerichAgricultural Research Service LLL. J. LundUniversity of California, Riverside APA. L. PageUniversity of California, Riverside

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Implication

A soil column experiment demonstrates solid-phase shifts of heavy metals into stable residual forms in sludge-treated soils, explaining their lack of downward leaching.

Key Points

To determine the chemical distribution and mobility of heavy metals in soil profiles amended with sewage sludge following extended water leaching.
Incorporated liquid or air-dried anaerobically digested sewage sludge into the top 15 cm of three reconstructed soil profiles and leached columns for 25 months using Colorado River water.
Applied a sequential extraction procedure to fractionate cadmium, copper, nickel, and zinc into exchangeable, adsorbed, organically bound, carbonate, and residual forms across sludge, treated layers, and untreated soils.
Heavy metals did not migrate below the top 15 cm sludge-soil application layer during the 25 months of leaching.
Most metals partitioned into organically bound, carbonate, or residual forms, with less than 36% of metals in sludge occurring as residual forms compared to >65% in unamended soils (except cadmium).
Cadmium, nickel, and zinc transformed progressively into more stable residual forms over time, whereas copper solid-phase distribution remained largely unchanged.

Cite This Study

Emmerich et al. (1982) studied this question.

synapsesocial.com/papers/6a830bc7162ea9d73e990077 https://doi.org/10.2134/jeq1982.00472425001100020007x

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Implication

A soil column experiment demonstrates solid-phase shifts of heavy metals into stable residual forms in sludge-treated soils, explaining their lack of downward leaching.

Solid Phase Forms of Heavy Metals in Sewage Sludge‐Treated Soils

Discussion

Member takes

Implication

Key Points

Cite This Study

Solid Phase Forms of Heavy Metals in Sewage Sludge‐Treated Soils

Discussion

Member takes

Implication

Key Points

Cite This Study

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