浙江省人为镉排放源与汇时空格局解析

近年来,随着工农业的迅猛发展,大量的人为镉排放对我国生态环境安全构成了严重威胁,而污染源识别在污染治理中具有举足轻重的作用.为此,本文以工农业集产区浙江省为案例,通过文献调研,构建了浙江省人为镉工农业排放因子清单,并采用清单核算法对浙江省人为镉排放的源汇进行了估算.结果表明,浙江省人为镉排放在1995-2017年期间基...

Spatial and temporal variation assessments on anthropogenic cadmium emission sources & sinks in Zhejiang Province

In recent years, a great amount of anthropogenic cadmium(Cd) emission into environment and China poses a serious ecological health risks due to the rapid development of industry and agriculture. Source identification plays an important role in Cd pollution mitigation. Therefore, this research conducted at Zhejiang Province (an intensive industrial and agricultural region) as a case study. According the literature review, the emission factors of Cd emission in Zhejiang have been developed. And the emission sources and sinks of anthropogenic Cd in Zhejiang Province evaluated by multiple pollution sources inventory method. The results show that the anthropogenic Cd emission in Zhejiang was increasing from 39 t in 1995 to 141 t in 2007. After 2007, the total Cd emission reached a certain peak with around 140 t·a^-1.The majored sink was solid waste which counted more than 75% of total emission. The sinks of atmosphere and water were only about 15% and 10% of total emission. Regarding Cd emission sources, raw coal combustion was the largest contribution with over 50% of total emission. And it followed by iron and steel production, non-ferrous metal smelting, paper production, cement production, plastic production, non-ferrous metal mining, oil consumption, phosphate fertilizer, battery production, flat glass production and ceramic production. For the spatial distribution, the northern area was much higher than southern area. Hangzhou and Ningbo showed very high Cd emission during the study period of 1995-2017 and it was up to over 20 t·a^-1 in 2015. To mitigation Cd pollution in Zhejiang, it suggested that focus on reducing raw coal combustion, iron and steel production, nonferrous metal smelting, paper production, cement production, especially in the northern region.