Zero-valent iron for contaminated land treatment.
ZVI and EZVI (Emulsified Zero-Valent Iron) technologies for in-situ remediation of chlorinated solvent contamination, heavy metals and industrial pollutants. Single injection, long-term sustained treatment. Suited for brownfield development, industrial sites and groundwater clean-up.
What It Is
Chemical reduction plus biological enhancement.
Zero-valent iron (ZVI) degrades contaminants through chemical reduction — iron particles donate electrons to break down chlorinated solvents such as TCE and PCE into harmless ethene. EZVI (Emulsified ZVI) advances this by encapsulating iron particles in a vegetable oil emulsion. The oil film attracts and concentrates DNAPL contaminants, which then diffuse into the aqueous phase to contact the iron and undergo dechlorination.
EZVI delivers a dual mechanism: chemical reduction acts rapidly while the vegetable oil slowly releases electron donors to support anaerobic microbial activity — providing long-term sustained remediation after a single injection event. The oil film also protects the iron from oxidation, extending its reactive lifespan in the subsurface significantly beyond standard ZVI.
Why It Matters
Four mechanisms. One remediation programme.
Iron powder combined with slow-release carbon and nutrients builds a "1+1>2" synergistic system — chemical reduction and anaerobic biological treatment reinforcing each other to treat combined organic and heavy-metal contamination in one programme.
A self-activated persulfate system uses ferric iron to generate contaminant-destroying free radicals without heat, UV or added activators — while degradation by-products feed a secondary biological pathway for sustained treatment.
Optimising nutrients, oxygen and moisture stimulates the indigenous microbial community already present on site — accelerating natural degradation of petroleum and organic contaminants without introducing new organisms.
A clean cover material laid over contaminated sediment forms a permeable reactive layer that stabilises, adsorbs and degrades contaminants in place — while suppressing methane generation that would otherwise destabilise the cap.
UK Market Entry
Certified. Compliant. Ready for market.
Bagwell Group brings a full range of ZVI, EZVI and complementary ISCR, ISCO and enhanced bioremediation materials to the UK market — manufactured by Sagwell Environment Technology, our Chengdu-based remediation materials partner. The range has been field-validated across refinery, fuelling-station, landfill, sediment, industrial and dry-cleaning sites, and is being introduced to the UK environmental remediation market for brownfield development and industrial site clean-up.
Bagwell Group
Bagwell Group
UK commercialisation partner bringing certified technologies to market.
Get In Touch
Discuss your contaminated site.
Contact us to discuss site conditions, contaminant types and whether ZVI, EZVI or another product in the range is appropriate for your remediation project.