TY - JOUR
T1 - Sorption of pesticides by a mineral sand mining by-product, neutralised used acid (NUA)
AU - Oliver, Danielle P.
AU - Pan, Yi Fong
AU - Anderson, Jenny S.
AU - Lin, Tsair Fuh
AU - Kookana, Rai S.
AU - Douglas, Grant B.
AU - Wendling, Laura A.
N1 - Funding Information:
The authors gratefully acknowledge Iluka Resources Ltd. for providing the neutralised used acid material for experimentation. One of the authors, Yi Fong Pan, was financially supported by the Taiwan National Science Council to conduct studies in Australia.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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U2 - 10.1016/j.scitotenv.2012.10.020
DO - 10.1016/j.scitotenv.2012.10.020
M3 - Article
C2 - 23178829
AN - SCOPUS:84869870797
SN - 0048-9697
VL - 442
SP - 255
EP - 262
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -