Abstract: The in-situ treatment scheme of a residue landfill in Qingshuitang Industrial Zone， Zhuzhou City was discussed. The properties of the waste residue and site conditions were considered， and the scheme of “vertical barriers+in-situ stabilization/solidification+leachate collection and treatment+site closure” was proposed. After the industry residue treatment， the heavy metals such as Pb， Cd and As could be effectively immobilization. The preliminary calculation of the emission reduction of Pb， Cd， As was 2 598.48 t， 7.31 t， 1 091.36 t， respectively. The double-row vertical barriers with a permeability coefficient of 1×10-7 cm/s and a compressive strength of 2.0 MPa （28 d） could meet the penetration distance up to 30 years （0.95 m）. The analysis results of the samples from the groundwater monitoring wells surrounding the slag landfill showed that the water quality met the requirements of class III of the GB/T 14848—2017 Standard for Groundwater Quality. The study could provide reference for the design of other similar cases in China.

Key words: heavy metal, waste residue, in-situ, Qingshuitang, vertical barriers