Abstract:
:Long-term behaviour is a major issue related to the use of zero-valent iron (ZVI) in permeable reactive barriers for groundwater remediation; in fact, in several published cases the hydraulic conductivity and removal efficiency were progressively reduced during operation, potentially compromising the functionality of the barrier. To solve this problem, the use of granular mixtures of ZVI and natural pumice has recently been proposed. This paper reports the results of column tests using aqueous nickel and copper solutions of various concentrations. Three configurations of reactive material (ZVI only, granular mixture of ZVI and pumice, and pumice and ZVI in series) are discussed. The results clearly demonstrate that iron-pumice granular mixtures perform well both in terms of contaminant removal and in maintaining the long-term hydraulic conductivity. Comparison with previous reports concerning copper removal by ZVI/sand mixtures reveals higher performance in the case of ZVI/pumice.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Moraci N,Calabrò PSdoi
10.1016/j.jenvman.2010.06.019subject
Has Abstractpub_date
2010-11-01 00:00:00pages
2336-41issue
11eissn
0301-4797issn
1095-8630pii
S0301-4797(10)00177-5journal_volume
91pub_type
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