ABSTRACT

Palladium (Pd) is widely used in the production of automotive catalytic converters that serve to reduce toxic emissions from motor vehicles. The aim of this study was to explore the transport of Pd in the urban water environment. The results showed that the amounts of transported Pd in the pollution chain followed the order of rainfall runoff > estuary > receiving water body > wet deposition, indicating that rainfall runoff was the main source of Pd input. The amount of transported Pd might not depend entirely on the short-term Pd inputs from rainfall runoff and wet deposition. In the estuary, the phenomenon that Pd transport was dominated by suspended matter appeared for the first time in the entire pollution chain. Acertain amount of the inputted Pd was absorbed and accumulated in the urban water environment so that the inputted Pd was not completely outputted.

摘要

钯（Pd）广泛用于汽车催化转化器的生产中，这些催化转化器用于减少汽车的有毒排放。这项研究的目的是探讨Pd在城市水环境中的运输。结果表明，污染链中Pd的迁移量遵循降雨径流>河口>接收水体>湿沉降的顺序，表明降雨径流是Pd输入的主要来源。Pd的迁移量可能不完全取决于降雨径流和湿沉降的短期Pd输入。在河口，在整个污染链中首次出现了以悬浮物为主的Pd迁移现象。