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Soil Remediation

Heavy Metal Pollution Remediation Technology

1. Stabilization/Solidification Remediation technology (S/S)

      Solidification is an established technology that encapsulates a waste to form a solid material and to restrict contaminant migration by decreasing the surface area exposed to leaching and/or by coating the waste with low permeability materials. Solidification can be accomplished by a chemical reaction between waste and binding (solidifying) reagents or by mechanical processes. Stabilization is the process that involves chemical reactions that reduce the leachability of waste. Stabilization chemically immobilizes hazardous materials or reduces their solubility through a chemical reaction. The physical nature of the waste may or may not be changed by this process.

      WELLE’s independently developed stabilization/solidification agent is designed for heavy metals and radioactive pollutants treatment based on in situ or ex situ disposal approaches. The leaching toxicity of treated soil is dramatically decreased. This process features low costs, fast-track construction, easy and simple to handle and effective as well.

2. Acid Dissolution Detoxication for Chromium Pollutant

      This technique takes advantage of transferring hexavalent chrome in the chromium pollutant to aqueous phase, and then using the reducer to resolve the hexavalent chrome to nontoxic trivalent chromium or using the precipitator to transfer the hexavalent chrome to the stable water chromate insoluble in water to accomplish the treatment of chromium pollution.

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