Li Jiu-hai, Dong Yuan-hua, Cao Zhi-hong, Wang Hui, An Qiong, Hu Zheng-yi, Yang Lin-zhang, Lin Xian-gui, Yin Rui
ISSAS-HKBU Joint Laboratory on Soil and Environment, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.
Huan Jing Ke Xue. 2006 Jun;27(6):1235-9.
Soil samples of current paddy soils, ancient paddy soil/ancient dry land soil, and bottom soils were collected from two sites in Chuodunshan Site of Majiabang Culture (about 6,000a). 15 polycyclic aromatic hydrocarbons (PAHs) were analyzed with HPLC, and their possible sources were identified. The sum of 15 PAHs was 202.9microg x kg(-1) and 207.7microg x kg(-1) in the surface soils from Site A and Site B respectively, which were mainly deposited from atmosphere. In ancient paddy soil from Site A, the total PAHs concentration sharply decreased to 56.0microg x kg(-1), but was still higher than those in ancient dry land soil and bottom soils with the sum of 32.0 approximately 36.9microg x kg(-1). In ancient paddy soil, the concentrations of 2-ring and 3-ring PAHs took a larger portion of 63 percents to the total PAHs, and naphthalene and phenanthrene were the most abundant compounds, while PAHs of more than 4 rings took a small part. The ratios of phenanthrene anthracene and benzo(a) anthracene chrysene and 13C-NMR spectrum of soil organic matter showed that PAHs in ancient paddy soil mainly originated from rice straw burning, biogenesis under reducing conditions may be another source.
从马家浜文化绰墩山遗址（约6000年前）的两个地点采集了当前水稻土、古水稻土/古旱地土壤和底土的土壤样本。采用高效液相色谱法分析了15种多环芳烃（PAHs），并确定了其可能的来源。A、B两地点表层土壤中15种PAHs的总量分别为202.9μg·kg⁻¹和207.7μg·kg⁻¹，主要来源于大气沉降。A地点古水稻土中PAHs的总浓度急剧降至56.0μg·kg⁻¹，但仍高于古旱地土壤和底土，后者总量为32.0～36.9μg·kg⁻¹。在古水稻土中，二环和三环PAHs的浓度占总PAHs的比例较大，为63%，萘和菲是最主要的化合物，而四环以上的PAHs占比很小。菲/蒽、苯并(a)蒽/ Chrysene的比值以及土壤有机质的¹³C-NMR谱表明，古水稻土中的PAHs主要来源于稻草燃烧，还原条件下的生物成因可能是另一个来源。
