A transition state iron-based heavy metal immobilization reagent and preparation method thereof

Abstract

The invention discloses a transition state iron-based heavy metal immobilized reagent and a preparation method thereof. The preparation method comprises the following steps of loading nanoscale zero valent iron on the surface of a substrate material; adding the substrate material loading the nanoscale zero valent iron into an acid-deficient solution, and reacting; converting the nanoscale zero valent iron loaded on the surface of the substrate material into transition state iron; washing and drying to obtain the transition state iron-based heavy metal immobilized reagent. According to the immobilized reagent, heavy metals in soil can be stably immobilized for a long time.

Description

technical field [0001] The invention belongs to the field of remediation of soil heavy metal pollution, in particular to a transition state iron-based heavy metal immobilization reagent and a preparation method thereof. Background technique [0002] As the world's population continues to grow, food production and security issues are imminent, and China's agriculture is the first to bear the brunt. Farmland pollution is an important restrictive factor for high grain production, resulting in a decline in comprehensive agricultural production capacity, which has affected the sustainability of agricultural production in my country, the quality of agricultural products, and the safety of the national ecological environment, and has aroused widespread concern from the public. Among the many factors of farmland pollution, chemical fertilizers, pesticides, and sewage irrigation are the main causes of farmland pollution. Due to the difficulty and harm of heavy metal pollution contro...

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Problems solved by technology

[0005] However, the immobilization of heavy metal ions with zero-valent nano-iron or substrate materials has its disadvantages that cannot be ignored.

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