Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (5): 919.

• Articles • Previous Articles     Next Articles

Sorption Characteristic of Organochlorine Pesticides onto the Lighter and Heavier Components of Biofilms, Suspended Particles and Surface Sediments in Natural Water

GUO Zhi-Yong, HUA Xiu-Yi, LIANG Da-Peng, DONG De-Ming*, LI Ming, LI Ya-Ting, SONG Xing, LIN Hua-Yi   

  1. College of Environment and Resources, Jilin University, Changchun 130012, China
  • Received:2010-01-14 Online:2010-05-10 Published:2010-05-10
  • Contact: DONG De-Ming. E-mail: dmdong@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20877033)和高等学校博士学科点专项科研基金(批准号: 20060183020)资助.

Abstract:

Lighter and heavier components of biofilms, suspended particles and surface sediments in natural water were separated by cesium chloride solution with a specific gravity of 1.8. The sorption of HCHs and DDTs on the solid materials and their lighter and heavier components was investigated through a batch-equilibration method. Sorption mechanisms were analyzed by comparing the contribution of these separated components. The results indicate that HCHs and DDTs partition in the mineral surface and amorphous organic matter is the main sorption mechanism of surface sediments. The linear partition mechanism and nonlinear pore-filling mechanism were simultaneously taken place in HCHs and DDTs sorption on Biofims and suspended particles due to their great heterogeneity and containing more complex components and structures.

Key words: Biofilms; Suspended particles; Surface sediment; Organochlorine pesticide; Sorption

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