太原小店污灌区土壤壬基酚的分布特征

本研究以内分泌干扰物壬基酚(NP)为例,研究了太原小店污灌区土壤NP的污染浓度水平及空间分布特征.结果表明,NP在研究区污灌土壤中普遍存在,含量高低顺序为:污灌区>过渡区>清灌区;总体上离灌渠越远,土壤中NP含量越低;NP含量与土壤有机质(TOC)呈正相关,与土壤pH值呈负相关;在垂直钻孔沉积物中,随土壤深度增加,NP含量逐渐减小,但在一定深度会出现NP的富集层,富集层深度受土壤理化性质的影响,间接反映了该区域的污灌历史及NP的下渗迁移能力.

Distribution characteristics of nonylphenol in Taiyuan Xiaodian sewage-irrigated soil

The distribution characteristics of nonylphenol (NP) in sewage-irrigated soils were investigated in Xiaodian, Taiyuan city. The results showed that NP was ubiquitous in sewage-irrigated soil, and the concentration of NP in soils was as the following order: sewage-irrigated area > transition area > groundwater-irrigated area. Generally, NP content decreased as the distance from the drainage increased formed and presented positive correlation with the content of total organic content (TOC) but a negative correlation with pH value. In borehole sediments, the deeper sampling depth, the lower NP content, until another enrichment layer occurred, which indirectly implied the irrigation history and the migration capacity of NP towards deeper soiland was relative to the soil characteristics.