Statistical evaluation of arsenic adsorption data using linear-plateau regression analysis

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

DOI:https://doi.org/10.2136/sssaj1992.03615995005600040020x· OSTI ID:5571104

McGeehan, S L; Naylor, D V; Shafii, B ^[1]

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1. Univ. of Idaho, Moscow, ID (United States)

Few studies have utilized a statistical approach for comparisons of adsorption data. Our objective was to evaluate the suitability of linear-plateau regression analysis to identify the As adsorption plateau and facilitate statistical comparison of As-adsorption rates and maxima. Three northern Idaho soils exhibiting a range in As-adsorption capacity were tested. Batch techniques with ion chromatographic determination of arsenite and arsenate were used. The linear-plateau regression model provided a good fit for the adsorption-rate data. The time required to attain an adsorption plateau ranged from 2 to 8 h, depending on soil characteristics and As species. The model allowed statistical identification of the As-adsorption plateau and subsequent comparison of As-adsorption rates and maxima through use of analysis of covariance and least significant difference procedures. 16 refs., 3 figs., 2 tabs.

• OSTI ID: 5571104
• Journal Information: Soil Science Society of America Journal; (United States), Journal Name: Soil Science Society of America Journal; (United States) Vol. 56:4; ISSN 0361-5995; ISSN SSSJD4
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ADSORPTION
ARSENIC COMPOUNDS
CHEMISTRY
CHROMATOGRAPHY
EVALUATION
ION EXCHANGE CHROMATOGRAPHY
LAND POLLUTION
MATHEMATICAL MODELS
MATHEMATICS
MONITORING
POLLUTION
REGRESSION ANALYSIS
SEPARATION PROCESSES
SOIL CHEMISTRY
SOILS
SORPTION
STATISTICAL MODELS
STATISTICS
SURFACE PROPERTIES