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H.E.N.C.I. Technology and the Advent of High-Flowrate Costeffective Nanocatalytic Groundwater Remediation

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Abstract:

When added to polluted water (employed in-solution e.g. in-situ), many new nano-sized catalyst particles have been shown to effect extremely rapid and complete catalytic destruction (chemical breakdown to benign species) of highly toxic / carcinogenic recalcitrant trace pollutants, largely of the large and ubiquitous CHC family of concern to regulatory agencies. Since this capability hold the potential to revolutionize groundwater remediation (GWR), the desire to use these highly effective catalysts for various large-scale GWR applications has been a natural consequence. But catalytic nanoparticles themselves are toxic, so their in-situ use necessitates that they in turn be completely removed from the treated water prior to its use. Moreover, because these particles are so small (and numerous), very robust (e.g. N.F or R.O.) operations would often be required to accomplish such removal, rendering most remediation operations cost-prohibitive.

Conversely, ex-situ use of nanocatalysts (immobilizing them on a ‘support’ in a flow-through reactor) has been stymied as well. Why? Until H.E.N.C.I, the nine engineering criteria inherent to immobilizing nano-sized particles for cost-effective ex-situ use (allowing scale-up for high throughput, high conversion applications like GWR) have proven insurmountable, precluding commercialization.

High-Efficiency Nano-Catalyst Immobilization (HENCI) technology is a new chemical engineering technology – a new unit operation – which alone meets these criteria, thus being the last piece in the puzzle of unleashing the power of nanocatalysis to remediate groundwaters for applicable scenarios: extremely cost-effective large-scale remediation-to-potable of precious-butcarcinogenic groundwater supplies:

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864706783749738

Publication date: January 1, 2006

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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