Patent ID: 11919058
Assignee: CHENGDU UNIVERSITY OF TECHNOLOGY
Field: Environmental technology (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 4:
5. The method for remediating petroleum hydrocarbon contamination in groundwater of claim 4, wherein when the buffer performance of the contaminated site soil is high buffer capacity, calcareous and high-iron soil, a first salt chelating agent is added into the soil to provide electron acceptor SO42−, so that the SO42− provided by a single donor in the contaminated site soil is in the range of a first acceptor;
when the buffer performance of the contaminated site soil is high buffer capacity, calcareous and low-iron soil, a first concentration of low-molecular organic acid chelating agent is added into the soil, and a second concentration of first salt chelating agent is simultaneously added to provide electron acceptor SO42−, wherein the first concentration is configured in such a way to be equal to the Ca2+ content in the contaminated site under the current situation, and the overall content of SO42− provided by multiple sources of the first salt chelating agent and/or low-molecular organic acid chelating agent is in the range of the first acceptor.