COLLOID MIGRATION IN A FRACTURED GRANITE: EVALUATION OF COLLOID MIGRATION PARAMETERS

Baik, Min-Hoon; Hahn, Pil Soo; Vilks, Peter

doi:2002.7.3.137

Environmental Engineering Research 2002;7(3): 137-148. DOI: https://doi.org/10.4491/eer.2002.7.3.137

COLLOID MIGRATION IN A FRACTURED GRANITE: EVALUATION OF COLLOID MIGRATION PARAMETERS

Min-Hoon Baik¹^†, Pil Soo Hahn¹, and Peter Vilks²

¹Korea Atomic Energy Research Institute 150 Dukjin-dong Yusong-gu, Daejeon 305-353, Korea
²Atomic Energy of Canada Limited, Pinawa, Manitoba, Canada ROE 1L0

Corresponding Author: Min-Hoon Baik ,Tel: +82-42-868-2058, Email: mhbaik@kaeri.re.kr

Received: February 16, 2002; Accepted: July 15, 2002.

ABSTRACT

Colloid migration experiments using synthetic latex colloids of two different sizes in a fractured large granite block were carried out in order to understand the migration behaviors of colloids. A one-dimensional colloid migration model considering the filtration process was used in order to interpret the experimental results and to evaluate migration parameters of colloids such as average migration velocity, dispersion coefficient, and filtration coefficient. It was confirmed from our migration experiment that colloid can migrate faster than groundwater through a fractured rock. The average velocities and dispersion coefficients of all colloids were not overly dependent on the colloid sizes, but the filtration coefficients varied greatly with the sizes of colloids. It was observed that colloids with a relatively larger size could be filtered even in the fractured media although other processes can remobilize the filtered colloids.

Keywords: average migration velocity | colloid migration | dispersion coefficient | filtration coefficient | fractured rock