Aliphatic acids: influence on sulfate mobility in a forested Cecil soil

Journal Article · · Soil Science Society of America Journal; (United States)

DOI:https://doi.org/10.2136/sssaj1990.03615995005400040036x· OSTI ID:5535156

Evans, A Jr; Anderson, T J ^[1]

---

1. Clemson Univ., SC (United States)

Dissolved organic substances derived from forest litter are believed to influence the retention and movement of SO{sub 4}{sup 2{minus}} in forest soils. A column study was conducted in which {sup 35}SO{sub 4} was surface applied to a soil and leached with either low-molecular-weight aliphatic acids (AA) or a forest-litter extract. Oxalic, malonic, and succinic acids were used in the concentration range 8.0 {times} 10{sup {minus}3} to 1.0 {times} 10{sup {minus}5} mol L{sup {minus}1}. Movement of {sup 35}SO{sub 4} was determined with column depth, as was the {sup 35}SO{sub 4} activity in the collected leachates. Labeled SO{sub 4} soil movement was found to increase with increasing AA concentration. Leachate {sup 35}SO{sub 4} activity was observed to increase in the order malonic > succinic > oxalic for acid treatments > 1.0 {times} 10{sup {minus}4} mol L{sup {minus}1}. The 1.0 {times} 10{sup {minus}5} mol L{sup {minus}1} acid treatments did not result in {sup 35}SO{sub 4} breakthrough in the soil columns. Reduced exchangeable {sup 35}SO{sub 4} for organic acid {ge} 1.0 {times} 10{sup {minus}3} mol L{sup {minus}1} suggests that at high concentrations, aliphatic acids may activate sulfate retention sites in soil, while at lower concentrations these acids may accelerate the movement of {sup 35}SO{sub 4} in forest soils due to selective organic-acid adsorption by soil components.

• OSTI ID: 5535156
• Journal Information: Soil Science Society of America Journal; (United States), Journal Name: Soil Science Society of America Journal; (United States) Vol. 54:4; ISSN SSSJD; ISSN 0361-5995
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540211 -- Environment
Terrestrial-- Basic Studies-- Radiometric Techniques-- (1990-)
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
CHEMISTRY
DAYS LIVING RADIOISOTOPES
DISSOLUTION
ENVIRONMENTAL TRANSPORT
EVEN-ODD NUCLEI
FOREST LITTER
ISOTOPE APPLICATIONS
ISOTOPES
LEACHING
LIGHT NUCLEI
MASS TRANSFER
MATERIALS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RADIOISOTOPES
RETENTION
SEPARATION PROCESSES
SOIL CHEMISTRY
SULFATES
SULFUR 35
SULFUR COMPOUNDS
SULFUR ISOTOPES
TRACER TECHNIQUES