Column percolation test for contaminated soils: Key factors for standardization

JOURNAL OF HAZARDOUS MATERIALS

卷:320

Article

Naka, Angelica¹  Yasutaka, Tetsuo²  Sakanakura, Hirofumi¹  Kalbe, Ute³  Watanabe, Yasutaka⁴  Inoba, Seiji⁴  Takeo, Miyuki⁵  Inui, Toru⁵  Katsumie, Takeshi⁵  Fujikawa, Takuro⁶  Sato, Kenichi⁶  Higashino, Kazuo⁷  Someya, Masayuki⁷ 

[1] Natl Inst Environm Studies, 16-2 Onogawa, Tsukuba, Ibaraki 3058506, Japan

[2] Natl Inst Adv Ind Sci & Technol, 1-1-1 Higashi, Tsukuba, Ibaraki 3058567, Japan

[3] Fed Inst Mat Res & Testing, Unter Eichen 87, D-12205 Berlin, Germany

[4] Cent Res Inst Elect Power Ind, 1646 Abiko, Abiko, Chiba 2701194, Japan

[5] Kyoto Univ, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan

[6] Fukuoka Univ, 8-19-1 Nanakuma, Fukuoka 8140180, Japan

[7] Tokyo Metropolitan Res Inst Environm Protect, Koto Ku, 1-7-5 Shinsuna, Tokyo 1360075, Japan

关键词: Column percolation test;    Contaminated soils;    Standardization;    Equilibration period;    Flow rate;   

DOI  :  10.1016/j.jhazmat.2016.08.046

来源: Elsevier

【 摘 要 】

Column percolation tests may be suitable for prediction of chemical leaching from soil and soil materials. However, compared with batch leaching tests, they are time-consuming. It is therefore important to investigate ways to shorten the tests without affecting the quality of results. In this study, we evaluate the feasibility of decreasing testing time by increasing flow rate and decreasing equilibration time compared to the conditions specified in ISO/TS 21268-3, with equilibration periods of 48 h and flow rate of 12 mL/h. We tested three equilibration periods (0, 12-16, and 48 h) and two flow rates (12 and 36 mL/h) on four different soils and compared the inorganic constituent releases. For soils A and D, we observed similar values for all conditions except for the 0 h-36 mL/h case. For soil B, we observed no appreciable differences between the tested conditions, while for soil C there were no consistent trends probably due to the difference in ongoing oxidation reactions between soil samples. These results suggest that column percolation tests can be shortened from 20 to 30 days to 7-9 days by decreasing the equilibration time to 12-16 h and increasing the flow rate to 36 mL/h for inorganic substances. (C) 2016 The Author(s). Published by Elsevier B.V.

【 授权许可】

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