Fig. 7From: Degradation and sorption of the herbicides 2,4-D and quizalofop-P-ethyl and their metabolites in soils from railway tracksAdsorption isotherms of QE, QA, 3-OH-QA, and 3-OH-CQO in soils from railway tracks and a crushed sand. EB: red, MBS: blue, MR: grey, CS: green. cs: amount adsorbed to soil, cw: concentration in solution. Note the different scalesBack to article page