Research Progress on Safe Utilization and Remediation Technologies of Cadmium-Contaminated Farmland Soil

Chengmeizi Fan

doi:10.6919/ICJE.202604_12(4).0050

Authors

Chengmeizi Fan

DOI:

https://doi.org/10.6919/ICJE.202604_12(4).0050

Keywords:

Farmland Soil; Cadmium Pollution; In Situ Immobilization; Low-Accumulation Wheat; Combined Remediation; Safe Utilization.

Abstract

Soil cadmium (Cd) pollution has become a prominent environmental problem restricting the sustainable development of agriculture and food security in China. Under the background of scarce cultivated land resources, the safe utilization technologies such as in situ immobilization, screening of low-accumulation crops and combined regulation are adopted for moderately and lightly Cd-contaminated farmland, which is the core path to realize "production while remediation". This paper systematically sorts out the current situation, sources, ecological and health hazards of Cd pollution in farmland soils in China, reviews the principles, characteristics and application progress of four remediation technologies including physical, chemical, biological and agronomic regulation, focuses on the research results of immobilizer development, screening of low-Cd-accumulation wheat varieties and their combined remediation, analyzes the shortcomings in the research of Cd-contaminated alkaline farmland in northern China, and takes Jiaozuo area as an example to illustrate the regional research status. Finally, it prospects the construction of efficient green immobilization materials, precise matching of varieties and immobilizers, long-term mechanism in field and regional technical system, aiming to provide theoretical reference for the safe utilization and scientific management of Cd-contaminated farmland.

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