[Degradation of -HCH in Soil Washing Solutions with nZVI and CaO].

Nano zerovalent iron (nZVI) and CaO were used to construct a heterogeneous Fenton-like system to degrade -hexachlorocyclohexane (-HCH) in soil solution, and the degradation efficiency and mechanism were investigated. The results showed that nZVI/CaO can degrade -HCH in an extensive pH range. When the dosage of nZVI and CaO was 1 g·L and pH was 5, the degradation rate of -HCH reached 93.

[Pollution Risk of Heavy Metals in Dust from the Building Along Elevated Road: A Case Study in Changzhou].

Totally 126 samples of windowsill dust were collected from different floors along elevated road in Changzhou. The concentrations of Cu, Zn, Pb, Cd, Ni and Cr were determined, and the vertical distribution and chemical speciation were analyzed. The enrichment factor, bioaccessiblity, potential ecological risk and health risk were evaluated.