JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2020, Vol. 37 ›› Issue (6): 120-126.DOI: 10.11988/ckyyb.20190054

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Rapid Measurement of Advection-Dispersion-Adsorption Parameters of Heavy Metals by Soil Column Test

YANG Kong-li1, ZHAN Liang-tong1, CHEN Cheng1,2, XIE Hai-jian1,3   

  1. 1. Key Laboratory of Soft Soils and Geoenvironmental Engineering of the Ministry of Education, Zhejiang University, Hangzhou 310058, China;
    2. Zhejiang Provincial Institute of Architectural Design and Research, Hangzhou 310006, China;
    3. Institute of Hydrology and Water Resources Engineering, Zhejiang University, Hangzhou 310058, China
  • Received:2019-01-15 Online:2020-06-01 Published:2020-06-21

Abstract: The advection-dispersion-adsorption parameters of heavy metals are crucial for evaluating the service performance of barrier systems. Efficient and reliable method to test these parameters systematically is still in lack at present. In order to obtain the advection-dispersion-adsorption parameters of heavy metal ions with less experimental quantities in a shorter test time, the soil column test using Pb2+ as a representative heavy metal ion was carried out in soil-bentonite. Results showed that the retardation factor of Pb2+ decreased from 13 to 11 when the flow rate increased from 0 m/s to 1.59×10-7 m/s, which was consistent with the law that the larger the flow rate, the smaller the retardation factor. The advection-dispersion-adsorption parameters of Pb2+ obtained by this method were in good agreement with the typical values reported in previous literature, which proved the validity of this method. This method reduced the number of tests, improved the efficiency of parameter acquisition by which the test results were also more reliable by means of single parameter decoupling.

Key words: heavy metal, advection-dispersion-adsorption parameters, soil column test, soil-bentonite, barrier systems, single parameter

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