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

Danielle P. Oliver, Yi Fong Pan, Jenny S. Anderson, Tsair Fuh Lin, Rai S. Kookana, Grant B. Douglas, Laura A. Wendling

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)255-262
頁數8
期刊Science of the Total Environment
442
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 環境化學
  • 廢物管理和處置
  • 污染

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