土壤中重金属元素生物可给性研究进展

Research Advances in Bioavailability of Heavy Metals in Soil

为了研究土壤重金属的生物可给性及其影响因素,综述了国内外近10年来重金属在土壤中的化学行为及其影响因素的研究,并对重金属生物可给性评价方法的研究进展进行了讨论,发现目前对透膜过程中重金属形态等微观领域的研究相对不足,特殊环境(如库区消落带、滨河湿地等)中的重金属生物可给性研究重视不够,土壤重金属的生物可给性尚未建立普适性的标准评价方法,造成科研工作之间的参考性不足,今后还需对植物根际微观区域中重金属的化学行为展开进一步研究,同时重金属生物可给性普适性分析方法的探索,仍然是科研人员的重要任务。

In order to study the bioavailability of heavy metals and their influencing factors,the chemical behavior of heavy metal in soils and the influencing factors on heavy metals bioavailability was reviewed;also the evaluation method of heavy metal bioavailability was discussed.It showed that the studies of the heavy metal species in the entering membranes process were relatively insufficient and more concern should be focused on the heavy metals bioavailability in some special ecosystem,such as water-level-fluctuating zone and riparian wetland.In the future,more studies should be conducted on heavy metal chemical behavior in rhizosphere and a universal method estimating heavy metal bioavailability should be established to improve the relative apprehensibility between studies in this field.