Treatment method of aluminum and iron composite polluted soil

Abstract

The invention provides a treatment method of aluminum and iron composite polluted soil. The method comprises the steps of digging out aluminum and iron composite polluted land masses; processing the aluminum and iron composite polluted land masses into 2-5mm soil particles through a crusher; feeding the soil particles into a muffle furnace for roasting under high temperature; grinding to obtain soil powder; adding diluted hydrochloric acid to the soil powder; adding activated carbon powder; fully mixing; filtering to obtain dewatered soil; adding soil to a vacuum reactor; heating until the temperature reaches 185-200 DEG C; maintaining the temperature for 30min; increasing the temperature to be 500; maintaining the temperature for 30-60min; crushing and disaggregating the obtained soil; feeding the soil into a magnetic separator; and separating iron from the soil so as to obtain the remediated soil. With the adoption of the method, aluminum and iron can be effectively separated; metalresource can be recycled; and the heavy metal polluted soil can be stably remediated.

Description

Technical field: [0001] The invention relates to the technical field of soil remediation, in particular to a treatment method for aluminum and iron composite polluted soil. technical background: [0002] With the rapid development of urbanization in our country, a large number of polluted sites have been generated due to the closure and relocation of factories. Most of these sites have the characteristics of heavy metal complex pollution, which poses a serious threat to human health and the ecological environment, and effective restoration is urgently needed. [0003] With the rapid development of industry and agriculture, chemical pollutants are continuously released into the ecosystem, and more than one chemical pollutant is tending to exist in the ecosystem at the same time. As a result, industrial and agricultural production and human health are facing the serious challenge of "compound pollution". How to remediate these compound polluted soils has become the focus of a...

AI Technical Summary

Problems solved by technology

[0007] At present, soil pollution remediation technology itself has obvious limitations. Physical remediation technology has problems such as high energy consumption, high processing cost, high equipment requirements, and heavy workload; chemical remediation technology has high processing cost and the risk of secondary pollution; Bioremediation has slow remediation process and incomplete degradation of pollutants leading to secondary pollution, etc.

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