Environmental Characteristics and Health Risk Assessment of High Cr and Ni Soils of Taiwan

• Main Authors: CHING-JEN HO, 何建仁
• Other Authors: 馬鴻文
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/24067456556216033724

博士 === 國立臺灣大學 === 環境工程學研究所 === 103 === The environmental authorities of Taiwan began to investigate the soil quality of farmlands in the nation by using grid sampling design method after the event of rice contamination with cadmium in the Taoyuan County in 1982. To correct the inadequacy of the grid sampling design method, the Taiwan Environmental Protection Administration start to using a special statistical sampling design method in 2010. Nine hundred hectares of contaminated farmlands have been discovered. Among them, 118 hectares of farmlands are contaminated with nickel and chromium. Some contaminated farmlands in Taiwan show high contents of chromium and nickel no matter the lands were polluted by receiving industrial wastewater or the elevated concentrations were caused by the processes of the nature. Depending on the origins and types of heavy metals, soils contaminated with heavy metals have different harmful effects on the environment and ecosystem. To make adequate institutional control strategies, it is necessary to realize the environmental characteristics and the risk of human health in the areas where the soils are with elevated chromium and nickel concentration. This study collects the literatures related to the abovementioned areas in Taiwan, and then conducts systematic analysis. The factors considered when conducting risk assessment in this study include the soil digestion methods and bioavailability.