Research status of heavy metal pollution evaluation in urban wetlands in China

Abstract

Urban wetlands are one of the ecosystems most closely related to human production and life, and have various functions such as stabilizing the environment, improving the urban environment, regulating and storing floodwater, supplementing groundwater, recreation, science and education culture, and protecting biodiversity. With the continuous shrinkage of urban wetlands in recent years and frequent pollution, many scholars at home and abroad have carried out a lot of research work on urban wetlands, of which the evaluation of heavy metal pollution in urban wetlands is one of the priorities. In this paper, this paper analyzes the reports on heavy metal pollution in urban wetlands in China in recent years, reviews the current situation of pollution evaluation in sediment, soil and water bodies of urban wetlands, and summarizes and summarizes the pollution evaluation methods of heavy metals. Among the many evaluation methods, the single index method, the ground accumulation index method, the potential ecological risk assessment method and the water quality standard level method are the most used.