Differences in sorption behaviour of carbaryl and phosalone in soils from Australia, Pakistan, and the United Kingdom
| dc.contributor.author | Ahmad, R. | |
| dc.contributor.author | Kookana, R. | |
| dc.contributor.author | Alston, A. | |
| dc.contributor.author | Bromilow, R. | |
| dc.date.issued | 2001 | |
| dc.description.abstract | <jats:p> Sorption of 2 nonionic pesticides, carbaryl (1-naphthyl methylcarbamate) and phosalone (S-6-chloro-2,3-dihydro-2-oxobenzoxazol-3-ylmethyl O,O-diethyl phosphorodithioate), was investigated for 48 soils from Australia, Pakistan, and the United Kingdom. A wide variation in sorption affinities of the soils to carbaryl and phosalone was observed. The sorption coefficient (K d) values for carbaryl ranged from 0.19 to 23.0 L/kg in Australian soils, from 0.99 to 59.7 L/kg in Pakistani soils, and from 1.09 to 23.0 L/kg in the UK soils. The K d values for phosalone ranged from 4.8 to 443 L/kg in Australian soils, from 15.5 to 1182 L/kg in Pakistani soils, and from 18.1 to 205 L/kg in the UK soils. To eliminate the effect of variation in organic carbon content among the soils, the K d values were normalised to the fraction of soil organic carbon (K oc ). However, K oc values for both pesticides varied by about an order of magnitude across the soils, decreasing in the following order: Pakistani > Australian > UK soils. Correlation between K d and organic carbon content of the soils was poor (r 2 = 0.44 and 0.46). The particulate organic C (53 µm–2 mm) was only slightly better correlated with K d than the total organic C in the <2 mm fraction of the soils. Thus soil organic C content alone is not a good predictor of sorption even for nonionic pesticides such as carbaryl and phosalone. Caution is needed during extrapolation of overseas data to predict sorption under local conditions. </jats:p> | |
| dc.identifier.citation | Soil Research, 2001; 39(4):893-908 | |
| dc.identifier.doi | 10.1071/SR00021 | |
| dc.identifier.issn | 0004-9573 | |
| dc.identifier.orcid | Kookana, R. [0000-0002-0477-3284] | |
| dc.identifier.uri | http://hdl.handle.net/2440/27228 | |
| dc.language.iso | en | |
| dc.publisher | C S I R O Publishing | |
| dc.source.uri | https://doi.org/10.1071/sr00021 | |
| dc.subject | Particulate organic C | |
| dc.subject | pesticides | |
| dc.subject | SOC | |
| dc.subject | sorption coefficient | |
| dc.title | Differences in sorption behaviour of carbaryl and phosalone in soils from Australia, Pakistan, and the United Kingdom | |
| dc.type | Journal article | |
| pubs.publication-status | Published |