Abstract
Most studies about urban street dust have been focused on big cities so far and less attention has been focused on small towns. In this paper, we collected 12 samples from four different localities (Commercial Area, Industrial Area, Shuangzhu Street, Xuefu Road) in small towns of Yongchuan District, Chongqing to investigate the concentration distribution and composition of phosphorus in street dust. The results reveal that dust samples from Commercial Area contain higher concentration of total phosphorus (TP) (e.g., 785mg/kg) comparing with dust samples from other three sites (e.g., 310-400mg/kg). The research also indicates that the size fraction plays an important role in the concentration distribution of TP. The smaller size fraction corresponds to higher TP concentration. In addition, Ca-P is the predominant form in every site and accounts for 66%-89% of TP. Organic carbon (OC) and pH also have an effect on concentration and composition of TP.
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