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Titolo:
ADSORPTION, DESORPTION AND DEGRADATION OF ALPHA-ENDOSULFAN IN TROPICAL SOILS OF THAILAND
Autore:
PARKPIAN P; ANURAKPONGSATORN P; PAKKONG P; PATRICK WH;
Indirizzi:
ASIAN INST TECHNOL,ENVIRONM ENGN DIV,POB 4 KLONG LAUNG 12120 PATHUM THANI THAILAND KASETSART UNIV,FAC SCI,DEPT APPL RADIAT & ISOTOPES BANGKOK 10900 THAILAND LOUISIANA STATE UNIV,WETLAND BIOGEOCHEM INST BATON ROUGE LA 70803
Titolo Testata:
Journal of environmental science and health. Part B. Pesticides, food contaminants, and agricultural wastes
fascicolo: 3, volume: 33, anno: 1998,
pagine: 211 - 233
SICI:
0360-1234(1998)33:3<211:ADADOA>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNSATURATED CONDITIONS; PARTITIONING BEHAVIOR; HALOGENATED ORGANICS; SORPTION-DESORPTION; TILLAGE SYSTEMS; WATER SYSTEMS; MODEL SOLIDS; 2 SOILS; ATRAZINE; DEETHYLATRAZINE;
Keywords:
ALPHA-ENDOSULFAN; TROPICAL SOILS; ADSORPTION; DESORPTION; DEGRADATION; PESTICIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
P. Parkpian et al., "ADSORPTION, DESORPTION AND DEGRADATION OF ALPHA-ENDOSULFAN IN TROPICAL SOILS OF THAILAND", Journal of environmental science and health. Part B. Pesticides, food contaminants, and agricultural wastes, 33(3), 1998, pp. 211-233

Abstract

The adsorption, desorption, and degradation of endosulfan chlorobicyclo[2,2,1]-2-heptene-5,6-bisoxymethylene sulfite) in two major tropicalsoils from Thailand were studied. Each soil-type, Rangsit lowland soils (Rangsit series) and Phrabat upland soils (Pakchong series), were sub-divided into surface or plow layer, 0-20 cm depth, and subsoils, 20-40 cm depth. Adsorption was determined using 24 h batch equilibrium, with five different concentrations of C-14 labelled endosulfan rangingfrom 1.04 to 16.64 ng/mg soils. Adsorption coefficient values (K-ads)as by Freundlich's model ranged from 0.02 to 0.20. Higher adsorption coefficients were measured in Rangsit soils as compared to Phrabat soils. Desorption as attributed to hysteresis was also measured. Desorption coefficient values (K-des) were higher than adsorption (K-ads) in each study. Degradation of endosulfan was through microbial process. Little abiotic degradation was measured in sterile soil sample. Measureddegradation rates were highest in Phrabat plow layer and subsoil. However, total degradation after 98 days was less than 20% of initial application rate. Results indicate that applied endosulfan would be persistent or slow to degrade in the soils studied.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 08:33:15