naa a22 4500 510750907 CHVBK 20180411083104.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11270-013-1743-6 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1743-6 Assessing Molybdenum Adsorption onto an Industrial Soil and Iron Minerals [Elektronische Daten] [Chunnu Geng, Xuping Jian, Yuhong Su, Qinhong Hu] The processes affecting adsorption of molybdenum (Mo) in alkaline industrial soils are not well known, as most research on Mo fate and transport has focused on agricultural soils. In this work, we performed studies of soil extraction, as well as sorption studies using both batch and stirred-flow cell approaches. After 60h of extraction, we observed, even where three extractable fractions were present, 14.1% of the bound residue was extracted by CaCl2 solution. This indicates that the procedures recommended by the Commission of European Communities Bureau of Reference, which is targeted to metals cations, not anions due to the use of extractants at acidic pH, are not a suitable approach for assessing mobility and availability of Mo in alkaline soils. Because the observed extent of Mo adsorption onto two Fe minerals, goethite, and amorphous iron hydroxide (HFO) was 2 to 3 orders of magnitude higher than that onto the soil, soils amended with these Fe minerals were found to have a higher Mo adsorption capacity, with HFO yielding stronger sorption than goethite. The additivity principle was successfully used to predict Mo adsorption with the HFO-amended soil but failed to do so for the goethite-amended soil. The best fit sorption isotherms and estimated parameters were slightly different from batch and flow cell experiments. The K d values of sorption coefficient in our industrial soils and Fe-minerals-amended soils ranged from 0.19 to 1.45L/kg from both experimental approaches; this low adsorption potential renders it infeasible to immobilize Mo into the soil matrix and reduce Mo availability by amending the soil with Fe minerals. In the future, materials with potentially high Mo adsorption capacities should be identified, screened, and characterized for permeable reactive barriers application. Springer Science+Business Media Dordrecht, 2013 Alkaline industrial soils nationallicence Adsorption isotherm nationallicence Additivity principle nationallicence Batch and flow cell systems nationallicence Mo immobilization nationallicence Geng Chunnu Institute of Urban Environment, Chinese Academy of Sciences, No. 1799 Jimei Road, 361021, Xiamen, China aut Jian Xuping College of Chemistry and Chemical Engineering, Xinjiang University, 830046, Urumqi, China aut Su Yuhong College of Chemistry and Chemical Engineering, Xinjiang University, 830046, Urumqi, China aut Hu Qinhong College of Environmental Studies, China University of Geosciences, 430074, Wuhan, China aut Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-16 0049-6979 224:10<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1743-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1743-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Geng Chunnu Institute of Urban Environment, Chinese Academy of Sciences, No. 1799 Jimei Road, 361021, Xiamen, China aut NATIONALLICENCE 700 1- Jian Xuping College of Chemistry and Chemical Engineering, Xinjiang University, 830046, Urumqi, China aut NATIONALLICENCE 700 1- Su Yuhong College of Chemistry and Chemical Engineering, Xinjiang University, 830046, Urumqi, China aut NATIONALLICENCE 700 1- Hu Qinhong College of Environmental Studies, China University of Geosciences, 430074, Wuhan, China aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-16 0049-6979 224:10<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer