Sustainability website / Case Studies 2004 / Xstrata alloys / Managing hexavalent chromium

Managing hexavalent chromium

Hexavalent chromium, a known carcinogen, is produced in very low concentrations and only under certain conditions during the ferrochrome production process. Xstrata Alloys has an integrated management programme including comprehensive sampling and analysis of all waste streams such as ambient air and water to ensure the safety of our employees and local communities.

Because hexavalent chromium is unstable, it is difficult to sample accurately. Very few producers have the necessary skills in-house to address these issues. As a result, the Ferro alloy Producers Association Environment Forum held a symposium on sampling and analysis of gaseous hexavalent chromium at the Council for Scientific and Industrial Research in August 2004 in South Africa.

The one-day event, sponsored by Xstrata, attracted producers, academics, government officials, consultants, chemists, and environmental specialists who delivered papers on a range of related topics to enhance our industry's understanding of the challenges faced and potential ways forward.

The symposium allowed environmental consultants and analytical laboratories to pool their knowledge and competencies. The papers given at the event were subsequently distributed more widely, together with a CD-ROM of the proceedings, amongst the scientific and environmental community, to increase awareness and expertise in this area.

As a result, chrome producers are able to engage a team of qualified personnel to help accurately sample and analyse hexavalent chromium. Xstrata Alloys have developed and implemented a standard for sampling and analysis.

In 2005, Xstrata Alloys will introduce non-invasive biological monitoring for hexavalent chrome for all potentially exposed employees.