Guo Qing-Jun, Chen Tong-Bin, Yang Jun, Strauss Harald, Lei Mei, Zhu Guang-Xu, Li Yan-Mei, Zhou Xiao-Yong, Li Xiao-Yan
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Huan Jing Ke Xue. 2011 Oct;32(10):3094-8.
This study has taken advantage of the characteristics of concentration of soil organic matter (SOC) and delta13 C(SOC) values to provide proofs for environment quality assessment and to know more about polluted sources, sizes and processes in Beijing steel company area. delta13C values of SOC is good for tracing sources and documenting shifts in community composition and distribution. Two sections (Beijing steel company area and Yongledian, Tongzhou) which belong to two different soil types collected in Beijing, and organic carbon isotopic composition and total soil organic carbon were analyzed. These results shows that SOC of soil samples from Beijing steel company area are quite high, and even 9.7% at the surface sample, however SOC from unpolluted area (Yongledian area) is lower than those of industrial area. delta13 C(SOC) from soils of Beijing steel company area and Yongledian area respectively vary from -24.8 per thousand to -23.1 per thousand and -26.4 per thousand to -20.5 per thousand, the results are quite different. The results reflect that there are different organic carbon sources in different types' soil: Organic carbon from Beijing steel company area has been mainly affected by coal burning, soil organic carbon concentrations are quite high, and pollution can affect on soils 70 cm deep underground; and soils from Yongledian area, have been not polluted, and organic matter is from natural litter (C3 plants). Although there are different soil organic carbon concentrations and isotope compositions, two soil sections have similar variation trends. This study provides proofs for environment quality assessment and know more about polluted and natural sources, sizes in Beijing.
本研究利用土壤有机质（SOC）含量及δ13C（SOC）值的特征，为环境质量评估提供依据，并进一步了解北京钢铁公司区域的污染源、规模及过程。SOC的δ13C值有助于溯源以及记录群落组成和分布的变化。采集了北京地区属于两种不同土壤类型的两个剖面（北京钢铁公司区域和通州永乐店），并分析了有机碳同位素组成和土壤总有机碳。结果表明，北京钢铁公司区域土壤样品的SOC含量相当高，表层样品甚至达到9.7%，而未受污染地区（永乐店区域）的SOC含量低于工业区。北京钢铁公司区域和永乐店区域土壤的δ13C（SOC）分别在-24.8‰至-23.1‰和-26.4‰至-20.5‰之间变化，结果差异较大。结果反映出不同类型土壤存在不同的有机碳源：北京钢铁公司区域的有机碳主要受燃煤影响，土壤有机碳含量相当高，污染可影响到地下70厘米深处的土壤；而永乐店区域的土壤未受污染，有机质来自天然凋落物（C3植物）。尽管土壤有机碳含量和同位素组成不同，但两个土壤剖面具有相似的变化趋势。本研究为环境质量评估提供了依据，并进一步了解了北京的污染和自然源、规模。
