For example, in the “Poison Rice Incident” of May 2013, the Food and Drug Administration of Guangzhou, China, found that 44.4% of rice and related products consumed in Guangzhou were contaminated with cadmium 2. could also be easily prepared and reprocessed.Īccording to an official report recently released by the China Ministry of Environmental Protection 1, 19.4% of the arable land in China is contaminated with heavy metals, such as cadmium, mercury, and arsenic, and organic pollutants, such as polycyclic aromatic hydrocarbons, resulting in environmental problems and food safety concerns. did not significantly alter the chemical composition of the soil, and it allowed for fast chelating capture, simple magnetic separation and facilitated heavy metal elution. could not remove the residual heavy metals and those bound to organic matter in the soil. The resulting and chelates could be magnetically separated, resulting in removal rates of approximately 84.9% and 72.2% for Cd and Pb, respectively. The results show that could chelate the heavy metal component of Cd, Zn, Pb, Cu and Ni carbonates, lead sulfate and lead chloride in water-insoluble salt systems. These reactions used a silane coupling agent and sodium chloroacetate.
was prepared via inorganic-organic and organic synthesis reactions that generated chelating groups on the surface of magnetic, multi-core, core-shell Fe 3O 2 (FS) nanoparticles. A new magnetic solid chelator powder, (core-shell Fe 3O 2 nanoparticles coated with iminodiacetic acid chelators), was used as a reactive magnetic carrier to selectively capture non-magnetic heavy metals in soil by chelation and removal by magnetic separation. A soil remediation method based on magnetic beneficiation is reported.
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