Dynamic release and transformation of metallic copper colloids in flooded paddy soil: role of soil reducible sulfate and temperature

Author(s):
Xu, H.; Xia, B.; He, E.; Qiu, R.; Peijnenburg, W.J.G.M. (0000-0003-2958-9149); Qiu, H.; Zhao, L.; Xu, X.; Cao, X.
Published
2020
Publication type
Article / Letter to editor

Abstract

S in the colloid phase increased with increasing sulfate content according to the Cu K-edge EXAFS spectra. The batch experiments incubated at 5, 25 or 35 °C proved that high temperature enhanced the microbial activity and released more Cu colloids during flooding. The colloid formation was delayed at low temperature but persisted longer in the soil, which led to greater particle average size because of slow growth and uniform agglomeration. Low temperature appeared to only influence the formation and growth but not the speciation of Cu colloids. Our results highlight the importance of soil reducible sulfate and temperature in mediating the dynamics of colloidal metals in flooded soil.

Date issued
2020-07-12
Language
English
Is part of
Journal of Hazardous Materials (2020), Vol. 402, p. 123462
hdl
1887/3154404
doi
10.1016/j.jhazmat.2020.123462