Persistence and chemical distribution of arsanilic acid in three soils

Book · Tue Jan 01 04:00:00 EST 1974

OSTI ID:6027900

Woolson, E A

The persistence and chemical distribution of 4-aminobenzene arsonic acid (arsanilic acid), the Lakeland sandy loam, Hagerstown silty clay loam, and Christiana clay loam was examined. Two application rates (158 and 790 ppm) and two moisture levels (75% field capacity and flooded) were established. The flooded soil was used to establish anaerobic conditions. Arsanilic acid was determined spectrophotometrically (520 nm) as the N-(1-naphthyl)ethylenediamine derivative; arsenic (840 nm) as an arsenomolybdenum blue complex. Total arsanilic acid, extracted sequentially by N NH/sub 4/Cl, 0.5 N NH/sub 4/F, 0.1 N NaOH, and 0.5 N H/sub 2/SO/sub 4/ at 0, 2, 4, 8, 16, 24, and 32 weeks, disappeared from all three soils at a relatively rapid rate, whereas total As remained constant. At the end of 32 weeks, less than 10% of the applied arsanilic acid could be extracted from any soil. With time, extractable arsenic became greater than extractable arsanilic acid at both rates and both moisture levels in the Hagerstown and Christiana soils. However, in Lakeland sandy loam, the extractable arsenic and arsanilic acid contents were the same under aerobic conditions; in the anaerobic soil, extractable arsenic was 5 times that of arsanilic acid. Based on extraction behavior, arsanilic acid formed salts with aluminum, iron, and calcium in the soil in the same manner as arsenate. Conversion of arsanilic acid to arsenate occurred at both soil moisture levels.

• OSTI ID: 6027900
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METALS
ALUMINIUM
AMINES
ARSANILIC ACID
ARSENATES
ARSENIC
ARSENIC COMPOUNDS
ARSONIC ACIDS
CALCIUM
CHEMISTRY
COMPARATIVE EVALUATIONS
ELEMENTS
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROGEN COMPOUNDS
IRON
MASS TRANSFER
METALS
ORGANIC ACIDS
ORGANIC ARSENIC COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SALTS
SEMIMETALS
SOIL CHEMISTRY
SOILS
TRANSITION ELEMENTS
WATER