Comparative meta-analysis and experimental kinetic investigation of column and batch bottle microcosm treatability studies informing in situ groundwater remedial design

JOURNAL OF HAZARDOUS MATERIALS

卷:323

Article; Proceedings Paper

Driver, Erin M.^1,2  Roberts, Jeff³  Dollar, Peter³  Charles, Maurissa^1,2  Hurst, Paul⁴  Halden, Rolf U.^1,2 

[1] Arizona State Univ, Ctr Environm Secur, Biodesign Inst, 781 E Terrace Mall, Tempe, AZ 85287 USA

[2] Arizona State Univ, Global Secur Initiat, 781 E Terrace Mall, Tempe, AZ 85287 USA

[3] SiREM, 130 Stone Rd West, Guelph, ON N1G 3Z2, Canada

[4] Golder Associates, 1931 Robertson Rd, Ottawa, ON K2H 5B7, Canada

关键词: Treatability studies;    Continuous-flow columns;    Batch bottles;    Kinetics;    Perchloroethylene;   

DOI  :  10.1016/j.jhazmat.2016.05.008

来源: Elsevier

【 摘 要 】

A systematic comparison was performed between batch bottle and continuous-flow column microcosms (BMs and CMs, respectively) commonly used for in situ groundwater remedial design. Review of recent literature (2000-2014) showed a preference for reporting batch kinetics, even when corresponding column data were available. Additionally, CMs produced higher observed rate constants, exceeding those of BMs by a factor of 6.1 +/- 1.1 standard error. In a subsequent laboratory investigation, 12 equivalent microcosm pairs were constructed from fractured bedrock and perchloroethylene (PCE) impacted groundwater. First-order PCE transformation kinetics of CMs were 8.0 +/- 4.8 times faster than BMs (rates: 1.23 +/- 0.87 vs. 0.16 +/- 0.05 d(-1), respectively). Additionally, CMs transformed 16.1 +/- 8.0-times more mass than BMs owing to continuous-feed operation. CMs are concluded to yield more reliable kinetic estimates because of much higher data density stemming from long-term, steady-state conditions. Since information from BMs and CMs is valuable and complementary, treatability studies should report kinetic data from both when available. This first systematic investigation of BMs and CMs highlights the need for a more unified framework for data use and reporting in treatability studies informing decision-making for field-scale groundwater remediation. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free