A part of the heavy metals in estuary and coastal zone occurs naturally in the environment; the other part is due to human activity; so the directly measured concentration of heavy metal does not automatically indicate anthropogenic enrichment. Fe2O3 was used in this study as conservative tracer to distinguish natural components from anthropogenic components of heavy metal sediment concentration in the Zhujiang estuary. Compared with clay and Al2O3, Fe2O3 is more suitable as reference element. The final results showed that two zones in the Zhujiang estuary were seriously contaminated by heavy metals. One nearby the Humen mouth; the other around the west coast of the estuary. The horizontal distribution of heavy metals indicates that Zn, Ni and Cu have wider contaminating areas than TiO2, V and Cr in the estuary.
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机译：河口和沿海地区的一部分重金属自然地发生在环境中;另一部分是由于人类活动;因此，直接测量的重金属浓度不会自动表明人为富集。本研究中使用Fe2O3作为保守示踪剂，以区分珠江河口中重金属沉积物浓度的人为组分。与粘土和Al2O3相比，Fe 2 O 3更适合作为参考元件。最终结果表明，珠江河口中的两个区域受重金属的严重污染。附近的虎门嘴;河口西海岸的另一个。重金属的水平分布表明Zn，Ni和Cu具有比河口中的TiO2，V和Cr更宽的污染区域。
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