蚌埠市初冬季节地表灰尘氮磷形态及空间分布特征

发布时间：2018-09-13 07:20

【摘要】：为了解蚌埠市地表灰尘中氮磷形态及空间分布特征,于2015年11月在不同功能区采集30份地表灰尘样品,采用化学提取方法测得氨态氮(NH_4~+-N)、硝态氮(NO_3~--N)、总氮(TN)、易交换态磷(ExP)、铝结合态磷(Al-P)、铁结合态磷(Fe-P)、闭蓄态磷(Oc-P)、钙结合态磷(Ca-P)、碎屑磷(De-P)和有机磷(Or-P),并对不同形态氮磷的空间分布特征、相关关系进行分析。结果表明,蚌埠市初冬季节地表灰尘中氮的主要形态为有机态氮(Or-N),占TN质量分数的91.85%;磷的主要形态为无机磷(IP),占总磷(TP)质量分数的96.36%。Or-N空间分布相对均匀,TN次之,而NH_4~+-N和NO_3~--N空间异质性明显;磷的空间分布差异性从大到小排序为Or-P、Fe-P、Al-P、Oc-P、Ca-P、DeP、TP、Ex-P。各种形态的氮磷均属于强变异,空间分布差异性较大,外界环境对其存在有强烈的干扰作用。TP空间分布比TN更趋于均匀。不同功能区地表灰尘氮磷质量比分析表明,公园绿地和商业区地表灰尘中氮磷质量比较高,居民区和文教区次之,交通区和工业区质量比较低。
[Abstract]:In order to understand the form and spatial distribution of nitrogen and phosphorus in surface dust of Bengbu, 30 samples of surface dust were collected from different functional areas in November 2015. Ammonia nitrogen (NH_4~ -N), nitrate nitrogen (NO_3~--N), total nitrogen (TN),) easily exchangeable phosphorus (ExP), aluminum-bound phosphorus (Al-P), iron-bound phosphorus (Fe-P), closed storage phosphorus (Oc-P), calcium-bound phosphorus (Ca-P), clastic phosphorus (De-P) and organic phosphorus (Or-P) were determined by chemical extraction method. The correlation relation is analyzed. The results showed that the main form of nitrogen in surface dust in Bengbu was organic nitrogen (Or-N), which accounted for 91.85% of TN, and the main form of phosphorus was 96.36%.Or-N spatial distribution of inorganic phosphorus (IP), in total phosphorus (TP). The spatial heterogeneity of NH_4~ -N and NO_3~--N is obvious, and the difference of phosphorus spatial distribution is Or-P,Fe-P,Al-P,Oc-P,Ca-P,DeP,TP,Ex-P. from big to small. All forms of nitrogen and phosphorus belong to strong variation, and the spatial distribution of TP is more uniform than that of TN, and the spatial distribution of TP is more uniform than that of TN. The analysis of nitrogen and phosphorus quality ratio of surface dust in different functional areas showed that the quality of nitrogen and phosphorus was higher in park green space and commercial area, followed by residential area and cultural and educational area, and the quality of traffic area and industrial area was lower.
【作者单位】：蚌埠学院应用化学与环境工程系;
【基金】：国家自然科学基金项目(41001292) 国家星火计划项目(2015GA710068) 安徽高等学校省级自然科学研究重点项目(KJ2016A459)
【分类号】：X513

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