Sorption of pesticides by a mineral sand mining by-product, neutralised used acid (NUA)

Oliver, Danielle P., Pan,Yi Fong, Anderson, Jenny S., Lin, Tsair Fuh, Kookana, Rai S., Douglas, Grant B. and Wendling, Laura A. (2013) Sorption of pesticides by a mineral sand mining by-product, neutralised used acid (NUA). Science of The Total Environment, 442 255-262. doi:10.1016/j.scitotenv.2012.10.020


Author Oliver, Danielle P.
Pan,Yi Fong
Anderson, Jenny S.
Lin, Tsair Fuh
Kookana, Rai S.
Douglas, Grant B.
Wendling, Laura A.
Title Sorption of pesticides by a mineral sand mining by-product, neutralised used acid (NUA)
Journal name Science of The Total Environment   Check publisher's open access policy
ISSN 0048-9697
1879-1026
Publication date 2013-01-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.scitotenv.2012.10.020
Open Access Status
Volume 442
Start page 255
End page 262
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Highlights
► A mining by-product, NUA, removed > 60% of atrazine, diuron, chlorpyrifos and 2,4-D.
► Only sorption of 2,4-D was decreased by the presence of other pesticides.
► There was negligible desorption of the pesticides from NUA.
► Nitrate and phosphorus had minimal effect on herbicide sorption to NUA.

This study investigated the sorption–desorption behaviour of four pesticides by a by-product from mineral sand mining, commonly referred to as neutralised used acid (NUA). In batch studies the average amount of pesticide removed after 6 h was 69% for atrazine, 89% for diuron, 61% for 2,4-D and 83% for chlorpyrifos. The lower sorption of 2,4-D to NUA compared with the other pesticides studied is most likely to be due to the high pH of the solutions (7.8 to 8.8) which would have resulted in 2,4-D being predominantly in an anionic form. The presence of other pesticides only significantly decreased the amount of 2,4-D sorbed from 59% to 34% when present in a mixture. Little (2 to 17%) diuron, chlorpyrifos, atrazine or 2,4-D were found to desorb from the NUA. The presence of nitrate or phosphate had minimal effect on the amount of diuron or atrazine sorbed to the NUA. However, all phosphate and nitrate treatments significantly (P < 0.05) decreased the amount of 2,4-D sorbed (< 50%) compared with when 2,4-D was present alone (65%). This study has shown that NUA has potential to be used as a sorbent for pesticides.
Keyword Water quality
Atrazine
Diuron
2,4-D
Chlorpyrifos
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Available online 22 November 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
 
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Created: Sat, 01 Feb 2014, 01:59:46 EST by Laura Wendling on behalf of School of Agriculture and Food Sciences