下辽河平原土壤砷有效性分析

利用辽河流域生态地球化学调查中取得的土壤砷形态分析等样品进行了大量、系统的对比研究,结果表明:下辽河平原土壤砷主要以离子交换态、水溶态、铁锰氧化态、碳酸盐结合态、强有机结合态、腐殖酸结合态及残渣态等7种形态存在,其中离子交换态及水溶态是可被生物吸收利用的形态——有效态,其含量主要受土壤砷全量、pH、有机质、土壤黏度等因素影响。

Study on the Availability of Arsenic in Soil from Lower Liaohe River Plain

Plentiful and systemic research work has been done according to soil speciation samples obtained in the geochemical survey work from lower Liaohe River Plain,and the result indicated that the arsenic exists in the soil of lower Liaohe River Plain mainly in the ion exchange form,water-soluble form,ferrimanganic oxidative form,carbonate binding form,organic binding form,humic acid binding form and residual form.Ion exchange form and water-soluble form are available forms which could be absorbed and utilized by biology,and their content depends on several factors such as content of arsenic in soil,pH value,organic content and viscosity of soil,etc.