Adsorption and Desorption of Herbicides by Soil

Harris, C. Jake; Warren, G. F.

doi:10.2307/4040611

Cited by 136 publications

(81 citation statements)

References 17 publications

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“…The rest of the samples were sandy loam. The high sand contents of the soils are an indication of very low organic carbon or organic matter and the tendency of such soils to adsorb pesticides would be low [16]. This was observed for the soils with low organic carbon content ranging between 0.44% and 0.9%.…”

Section: Resultsmentioning

confidence: 61%

“…Low moisture content favours the adsorption of pesticides since the capacity of water molecules to displace pesticides and other organic compounds from adsorption sites, releasing the pesticide into the soil solution is reduced. The amount of pesticide adsorbed consequently, decreases with increasing moisture content [16]. 8.01 ± 0.20 9.33 ± 0.14 8.29 ± 0.12 10.66 ± 0.14 13.56 ± 0.13 12.50 ± 0.09 The sand, clay and silt % were measured on dry weight basis.…”

Section: Resultsmentioning

confidence: 99%

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<b>Lindane and propuxur residues in the top soils of some cocoa growing areas in five districts of the Central Region of Ghana</b>

Bentum

Essumang

Dodoo

2006

Bull. Chem. Soc. Eth.

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ABSTRACT. Lindane and propoxur residues in some topsoil samples from five cocoa growing districts in the Central Region of Ghana have been determined. Ten soil samples were taken randomly at a depth of 0-10 cm from pre-selected farms in each district. Some physical and chemical properties of the soils were determined. The pesticide residues were extracted from 50 g of topsoil by continuous Soxhlet extraction using a (1:1 v/v) acetone-chloroform mixture for six hours. Clean up of the extract was done by liquid-liquid partitioning and column chromatography using alumina and silica gel adsorbents. The pesticide residues were finally analysed by gaschromatography using 63 Ni electron capture detector (ECD) and flame ionization detector (FID) for lindane and propoxur, respectively. Lindane and propoxur pesticide residues were found to be present in all the soils to which these pesticides had already been applied. Generally, lindane residues occurred in greater amounts than propoxur. The concentrations of lindane ranged from 2.1 to 15.4 mg kg -1 and propoxur from 1.71 to 7.95 mg kg -1. Both the extracted lindane and propoxur residues correlated negatively with pH, cation exchange capacity, moisture content, and organic carbon. Propoxur correlated positively with the amount of clay but there was no significant correlation between the amount of clay and the extracted lindane concentration.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

<b>Lindane and propuxur residues in the top soils of some cocoa growing areas in five districts of the Central Region of Ghana</b>

Bentum

Essumang

Dodoo

2006

Bull. Chem. Soc. Eth.

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“…Hronološki posmatrano, još je Hance 1965. godine (Hance, 1965b), na osnovu svojih istraživanja i ranije publikovanih rezultata (Sherburne i Freed, 1954;Sheets, 1958;Harris i Warren, 1964;Hance, 1965a;Lampert i sar., 1965), zaključio da je za datu dozu primene različitih herbicida, fitotoksičnost veća u zemljištima sa nižim sadržajem organske materije. Ubrzo zatim, usledila su obimna istraživanja na osnovu kojih je ova zakonitost proširena na sve pesticide (Bailey i White, 1964;Upchurch, 1968).…”

Section: Adsorpcija Pesticida Za Zemljišteunclassified

The processes that determine the fate of pesticides in soil

Djurovic¹

2011

PESTIC PHYTOMED

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REZIMEPesticidi su neizostavni deo životne sredine, jer se usled intenzivne primene njihovi ostaci često detektuju u prirodi, naročito u zemljištu. Bez obzira na koji način dospeju u zemljište, njihova dalja sudbina će zavisiti od mnoštva faktora. Uzimajući u obzir složenost interakcija pesticida i zemljišta, kao i činjenicu da je intenzitet interakcija istog jedinjenja sa različitim zemljištima različit, sve su brojnija ispitivanja uticaja najvažnijih zemljišnih parametara u pomenutim interakcijama.U ovom radu su predstavljeni procesi koji određuju sudbinu pesticida u zemljištu, kao i faktori koji utiču na te procese. Poseban osvrt je stavljen na adsorpcione procese, s obzirom da oni određuju koncentraciju slobodne frakcije molekula pesticida, tj. količine pesticida koja može da učestvuje u detoksifikacionim procesima u koje spadaju procesi degradacije i kretanja. UVODPesticidi, koji predstavljaju veoma značajnu grupu agrohemikalija, pored koristi, donose sa sobom i neke neželjene posledice. U sagledavanju ovih štetnih efekata, centralno mesto zauzima opasnost od zagađenja ži-votne sredine (Đurović i Đorđević, 2010a; 2010b; Marković i sar., 2010).Pod sudbinom pesticida u životnoj sredini podrazumevaju se procesi kretanja i transformacije, od kojih su zbog potencijalne dužine trajanja i efekata koje mogu proizvesti, najznačajniji oni koji se dešavaju u zemljištu. Bez obzira da li u zemljište dospevaju direktnom primenom ili na indirektan način, dalja sudbina pesticida u ovom matriksu će zavisiti od međusob-nog dejstva niza složenih fizičko-hemijskih procesa. Ispitivanja u ovoj oblasti imaju za cilj, pre svega, dobijanje podataka koji omogućavaju procenu opasnosti, tj. rizika od primene pesticida. S obzirom da adsorpcioni procesi indirektno određuju i koncentraciju pesticida koja može da učestvuje u procesima degradacije i kretanja, ispitivanja u ovoj oblasti su, pre svega, usmerena na određivanje adsorpcionih konstanti i adsorpciono/desorpcionih izotermi, koje omogućavaju i utvrđivanje fizičko-hemijskih karakteristika zemljišta najodgovornijih za retenciju ispitivanih pesticida u zemljištu, odnosno za njihovo ispiranje po profilu zemljišta.

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“…The latter are widely distributed in nature, occurring in soils (SCHNITZER and KHAN 1972), lakes (ISHIWATARI 1969), rivers (LAMAR 1968), and in the sea (RASHID and KING 1969). The bipyridylium herbicides are widely used as aquatic and contact herbicides (CALDERBANK 1968, AKHAVEIN andLINSCOTI 1968) and are known to be readily absorbed by organic surfaces, such as humic substances (DAMANAKIS et al 1970;BEST et al 1972;BURNS et al 1973 a, b, and c;KHAN 1973 a and c), organo-clay complex (KHAN 1973 b), activated carbon (COFFEY and WARREN 1969, WEBBER et al 1965, FAUST and ZARINS 1969, cellulose and lignin (DAMANAKIS et al 1970), and peat, muck, and organic soils (HARRIS and WARREN 1964, O'TOOLE 1966, SCOTI and WEBER 1967, TUCKER et al 1969, COFFEY and WARREN 1969, CALDERBANK and TOMLINSON 1969, DAMANAKIS et al 1970, WATKIN and SAGAR 1971, FRANK 1972. In view of the ubiquitous occurrence of humic substances and the wide use of bipyridylium herbicides in soil and aquatic environments, it appears appropriate to present a brief account of the information available at present on the interaction of humic materials with bipyridylium compounds.…”

Section: Introductionmentioning

confidence: 99%

Humic substances reactions involving bipyridylium herbicides in soil and aquatic environments

Khan

1974

Residue Reviews

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Adsorption and Desorption of Herbicides by Soil

Cited by 136 publications

References 17 publications

<b>Lindane and propuxur residues in the top soils of some cocoa growing areas in five districts of the Central Region of Ghana</b>

<b>Lindane and propuxur residues in the top soils of some cocoa growing areas in five districts of the Central Region of Ghana</b>

The processes that determine the fate of pesticides in soil

Humic substances reactions involving bipyridylium herbicides in soil and aquatic environments

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