HSC Harsco Corporation

Worldwide industrial solutions company Harsco Corporation (NYSE:HSC) announced today its second strategic technology alliance this year aimed at providing environmental solutions to significant industrial waste streams, with the signing of an exclusive agreement with Equinox Environmental Limited, a UK-based "green" technology company that has developed proprietary processes for the cost-effective resource recovery and re-use of certain industrial by-products.

This latest agreement will address the processing and remediation of various industrial solid waste streams that involve surface hydrocarbon contamination, such as oily mill scale from steelmaking operations; used foundry sand from foundry operations; and oil storage tank residues referred to as "tank bottoms" at oil refineries, which are primarily a mixture of oil and sand. The technology is designed to liberate the value in the oil and produce an inert, oil-free residue as a by-product.

At steel mills, the technology will be used to clean oily mill scale and allow the cleaned, oil-free scale to be recycled, thereby returning valuable iron units into production. At the same time, the recovered oil can be either sold or used as fuel within the steelmaking process. At refineries, Equinox's technology has been used to separate and recover residual oil content from "tank bottoms." As with the oily steel mill scale, the recovered oil can either be recycled or sold on the commercial market.  Moreover, the resultant oil-free sand can be recycled without further processing, thus eliminating the need for carbon-releasing burn-off, as is the case today with some current technologies.

The companies plan to jointly market the technology as a turn-key, onsite resource recovery and environmental compliance service, drawing extensively from Harsco's worldwide operating footprint in combination with Equinox's broad contacts throughout the petroleum industry. The technology is expected to further add to Harsco's established plant services to steelmakers, refineries and other large industrial operations through its Harsco Metals and Harsco Infrastructure business groups. The companies are already in discussions with a range of industrial customers and several pilot demonstration projects are expected to be underway in 2012.

"This is a promising technology with the potential for expanding Harsco's knowledge-based, onsite industrial services into new business areas," said Harsco Chairman, President and CEO Salvatore D. Fazzolari. "We look forward to this further addition to our growing environmental solutions portfolio."

Today's announcement follows a separate strategic technology alliance announced by Harsco in August that similarly addresses the Company's increasing focus on providing solutions to long-standing environmental issues faced by heavy industries. That alliance, with clean energy technology company LanzaTech, is targeted at the capture and reuse of steel mill flue gases as a source of reliable energy in the form of ethanol. LanzaTech is the first company to successfully demonstrate the production of fuel-grade ethanol from steel mill gases. Together, Harsco and LanzaTech plan to accelerate the introduction of this technology to Harsco's steelmaking customers throughout the Americas, Europe and selected emerging markets.

About Equinox Environmental

Equinox Environmental Limited is a UK-based technology developer and solutions provider for the treatment of specialized industrial waste streams, including sludge and oily solids and industrial waste water. Learn more at www.equinoxenvironmental.net.

About Harsco

Harsco Corporation is a global solutions company serving major industries fundamental to worldwide infrastructure development and economic growth, including steel and metals, construction, railways and energy. Harsco's common stock is a component of the S&P MidCap 400 Index and the Russell 1000 Index. Additional information can be found at www.harsco.com.

The Harsco Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=361

Forward Looking Statements

This news release contains forward-looking statements based on management's current expectations, estimates and projections. All statements that address expectations or projections about the future, including statements about Harsco Corporation's strategy for growth, product development, market position, expected expenditures and financial results are forward-looking statements. Some of the forward-looking statements may be identified by words like "may," "could," "believes," "expects," "anticipates," "plans," "intends," "projects," "indicates," and similar expressions. These statements are not guarantees of future performance and involve a number of risks, uncertainties and assumptions. Many factors, including those discussed more fully elsewhere in this release and in documents filed with the Securities and Exchange Commission by Harsco Corporation, particularly the company's latest annual report on Form 10-K and quarterly report on Form 10-Q, as well as others, could cause results to differ materially from those stated. These factors include, but are not limited to, changes in the worldwide business environment in which Harsco Corporation operates, including general economic conditions; changes in currency exchange rates, interest rates, commodity and fuel costs and capital costs; changes in the performance of the equity and debt markets that could affect, among other things, the valuation of the assets in the company's pension plans and the accounting for pension assets, liabilities and expenses; changes in governmental laws and regulations, including environmental, tax and import tariff standards; market and competitive changes, including pricing pressures, market demand and acceptance for new products, services, and technologies; unforeseen business disruptions in one or more of the many countries in which the company operates due to political instability, civil disobedience, armed hostilities, public health issues or other calamities; the seasonal nature of the company's business; our ability to successfully enter into new contracts and complete new acquisitions or joint ventures in the timeframe contemplated or at all; the recent global financial and credit crisis, which could result in our customers curtailing development projects, construction, production and capital expenditures, which, in turn, could reduce the demand for our products and services and, accordingly, our sales, margins and profitability; the financial condition of the company's customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability; the successful integration of the company's strategic acquisitions; the company's ability to successfully jointly market Equinox's technology; the company's ability to successfully implement cost-reduction initiatives, including the achievement of expected cost savings in the expected timeframe; and other risk factors listed from time to time in the company's SEC reports. Harsco Corporation undertakes no duty to update forward-looking statements.

CONTACT: Investor Contact
         Eugene M. Truett
         717.975.5677
         etruett@harsco.com
         
         Media Contact
         Kenneth D. Julian
         717.730.3683
         kjulian@harsco.com