不同形态的硅对Cd在金属氧化物和金属矿物上的吸附机制影响
摘要：镉是最早被公认的主要有毒重金属之一，由于镉在土壤--植物系统中具有高移动性和
高毒害性等特点，镉污染给人类健康生活带来巨大威胁。作为非营养元素，镉会影响植物的生物量积累、光合作用等，对植物生长产生严重毒害。并且镉多以离子形态吸附在土壤表面，相对于其它重金属元素更容易被植物吸收。另一方面，每年都会有大量的镉随着“三废”的排放释放到环境中，最终对人体健康造成严重危害。本文从生态系统中镉的来源、镉对人体和植物的危害、镉污染的修复措施、硅对镉吸附机制影响等方面做相关阐述。
关键词：镉；重金属形态；硅对吸附机制的影响
Effects of Different Forms of Silicon on the Adsorption Mechanism of Cd on Metal Oxides and Metal Minerals
WANG Zichen
（Nanjing forestry university）
Abstract: Cadmium was one of the first recognized major toxic heavy metals, which has high mobility and toxicity in soil-plant systems. Cadmium pollution poses a great threat to human health. As a non-nutritive element, cadmium can affect the biomass accumulation and photosynthesis of plants and produce serious toxicity to plant growth. Cadmium is mostly adsorbed on the soil surface in the form of ions, which is easier to be absorbed by plants than other heavy metal elements. Every year, a large amount of cadmium is released into the environment along with the discharge of 'three wastes', resulting in serious harm to human health. In this paper, the sources of cadmium in the ecosystem, the harm of cadmium to human and plants, the remediation measures of cadmium pollution, and the effect of silicon on the mechanism of cadmium adsorption are discussed.
Keywords: cadmium； heavy metal form； effect of silicon on adsorption mechanism
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