Onyx has bought the hazardous waste business from Shanks for £28 million, which according to the company makes it the clear market leader across the UK in the future developing hazardous waste sector.
The company sees this acquisition as a strategic long-term investment in its commercial business and helps to position it favourably particularly in the pharmaceutical and chemical sectors.
Onyx chief executive Cyrille du Peloux said: "This is yet another positive move by Onyx where we see a real strategic opportunity to add value for our customers by providing a fully integrated approach with a comprehensive range of treatment and disposal options.
The acquisition includes eight chemical treatment sites and the high temperature incinerator and waste to energy plant at Fawley - one of only two merchant facilities that are operational in the United Kingdom.
These facilities include a dedicated transport fleet and a workforce of some 300 employees.