Reactive (Oxygen) Gas Barrier and Zone Technologies - Permeable Reactive Barrier: Sustainable Groundwater Remediation - page 199

TDR—gas saturation
distribution

Neutron n-n
(c/min)

GP11-Eh2-W1

TDR, SGmin-max Vol.% R01 (m)/V G (m/h)/S G Redox potential Em Pressure p (hPa)

25 30

300 8

7
6
5
4
3

5

<1,7-2,2/5-11/2,5-11

200

20

25

6

100

12

20

0

7

10

-100

1,7/5-17/2,5-8
<1,7-1,7/2-32/2,5-18

2

15

8

Em (mV)
O2(mg/L)

5

-200

1

0

-300

0 10

9

0 10 20

0.00.5 1.0 1.5 2.0 00.5 1 1.5 2

Time (h) Time (h)

FIGURE 10.11
Combined gas sensing of storage zones with TDR, n-n-log, redox, O 2 -optodes, and pressure detectors for gas reloading decisions. (From Engelmann, F.I.
2010: Model supported high pressure pulsed Gas Injection (HDI) for in situ remediation of contaminated aquifers: Technology for a controlled opera-
tion of gas storage zones and development of a measurement system of in situ gas saturation and a gas injection technology. Report Nr. KF0011010SB7-1,
Sensatec, 46 p. (in German).)