Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, 124 #, No. 393, Bin Shui Xi Dao, Xiqing District, Tianjin, 300387, China.
Environ Geochem Health. 2013 Jun;35(3):405-16. doi: 10.1007/s10653-012-9503-x. Epub 2012 Dec 2.
Cadmium (Cd) in coal, fly ash, slag, atmospheric deposition, soils and sediments collected from Tianjin, northern China, were measured to provide baseline information and determine possible Cd sources and potential risk. The concentrations of Cd in coal, fly ash and atmospheric deposition were much higher than the soil background values. Fallout from coal-fired thermal power plants, heating boilers and industrial furnaces has increased the Cd concentration in soils and sediments in Tianjin. The concentrations of Cd in soils of suburban areas were significantly higher than in rural areas, suggesting that coal burning in Tianjin may have an important impact on the local physical environment. Cd from coal combustion is readily mobilized in soils. It is soluble and can form aqueous complexes and permeate river sediments. The high proportion of mobile Cd affects the migration of Cd in soils and sediments, which may pose an environmental threat in Tianjin due to the exposure to Cd and Cd compounds via the food chain. This study may provide a window for understanding and tracing sources of Cd in the local environment and the risk associated with Cd bioaccessibility.
本研究对中国北方天津市的煤、粉煤灰、炉渣、大气沉降物、土壤和沉积物中的镉（Cd）进行了测量，以提供基础信息，并确定可能的 Cd 来源和潜在风险。煤、粉煤灰和大气沉降物中的 Cd 浓度明显高于土壤背景值。燃煤热电厂、采暖锅炉和工业炉的沉降物增加了天津市土壤和沉积物中的 Cd 浓度。郊区土壤中的 Cd 浓度明显高于农村地区，表明天津市的燃煤可能对当地的物理环境产生重要影响。煤燃烧产生的 Cd 在土壤中容易被迁移。它是可溶性的，可以形成水合络合物并渗透到河流沉积物中。高比例的可移动 Cd 会影响 Cd 在土壤和沉积物中的迁移，由于通过食物链暴露于 Cd 和 Cd 化合物，这可能会对天津市造成环境威胁。本研究可能为了解和追踪当地环境中 Cd 的来源以及与 Cd 生物可利用性相关的风险提供一个窗口。
