Derivation of ecological standards for risk assessment of molybdate in soil

K. Oorts, E. Smolders, S.P. McGrath, C.A.M. van Gestel, M.J. McLaughlin, S. Carey

Research output: Contribution to JournalArticleAcademicpeer-review


An extensive testing programme on the toxicity of sodium molybdate dihydrate in soil was initiated to comply with the European REACH Regulation. The molybdate toxicity was assayed with 11 different bioassays, 10 different soils, soil chemical studies on aging reactions, and toxicity tests before and after 1-year equilibration in field conditions. Differences in molybdate toxicity among soils were best explained by soil pH and clay content. A correction factor of 2.0 was selected to account for the difference in molybdate toxicity between laboratory and field conditions due to leaching and aging processes. Toxicity thresholds were determined as the HC
Original languageEnglish
Pages (from-to)168-180
JournalEnvironmental Chemistry
Issue number1
Publication statusPublished - 2016


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