Question

QUESTION 8 A "Reserve" is (choose one)? a) Identified, and cannot be economically produced b) Identified, and economical to produce c) Undiscovered, and economically produced d) Undiscovered, and economical to produce QUESTION 9 Which one of the following addition IS NOT correct for Permeable Reactive barriers (choose one)? a) Zero-valent iron b) Bacteria c) Lime d) Phosphorus

Answer 1

8)

Reserves are the natural resources that have been discovered; can be accessed with current technology and economically feasible to extract.

So the reserve is identified, and economical to produce.

so 2nd option is correct option.

9).

● Zero-valent iron (ZVI or Fe0) remains the reactive medium that is most used in permeable reactive barriers.

● Permeable Reactive Barrier (PRB) is an in situ treatment zone in which pumice, perlite and lime using as permeable reactive barriers.

● A permeable reactive barrier (PRB) is an in situ remediation method that used limestone, and phosphate-based adsorbent materials (Conca 2002) as permeable reactive barrier.

So by above information we can conclude that 2nd option is correct ​bacteria.

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thank you.