Hu Gongren

Petrology, chronology and isotope geochemistry of the proterozoic amphibolites from Xiangshan, central Jiangxi province, China

On the basis of a comprehensive study on the petrology, trace elements and isotopic geochemistry of the Xiangshan amphibolites, we suggest that the protoliths of the amphibolites were basalts formed in an island-arc tectonic setting. The basaltic magma was derived from a slightly depleted mantle source with a small amount of crustal contamination. Assemblage of the rock-forming minerals indicates that these amphibolites underwent a low-grade metamorphism of amphibolite facies. According to the formation age (1113 Ma) and subsequent metamorphic age (726.6 Ma) of the basalts as well as the geological and geochemical features of these amphibolites, a tectonic model of Proterozoic oceanic island-arc setting is proposed for central Jiangxi.

Accumulation and translocation of heavy metals in Aegiceras corniculatum in Luoyang River Estuary wetland, Quanzhou Bay

The contents of heavy metals in Aegiceras corniculatum and the acid-leachable contents of heavy metals in the rhizosphere sediments in Luoyang River estuary of Quanzhou Bay were determined, and the concentration and transfer capacity of heavy metals in the different tissues of Aegiceras corniculatum was discussed. The average acid-leachable contents of heavy metals in the rhizosphere sediments showed a sequence of Fe> Mn> Zn> Pb> Cu> V> Cr> Ni> Co> Sn> Cd> As> Sb. With the exception of Sb and As, the contents of heavy metals accumulated in the tissues of Aegiceras corniculatum were lower than the acid-leachable contents of heavy metals in the rhizosphere sediments. Pb, Cr, Mn, Zn, V, Sb and Sn were accumulated mainly in leaf, and Fe, Co and Ni were mainly stored in root, while Cu and As were concentrated in branch. The translocation factors (TFs) of heavy metals from root to leaf were almost more than 1 except for Fe, V and Co.

Health risk assessment of heavy metals in soil of urban road, Quanzhou City

With the development of urbanization, the environmental quality of urban soil has been declining. Transport has become an important source of heavy metals in soil. To have a preliminary understanding of soil heavy metals pollution in the urban road, in this study, the contents of Cd, As, Pb, Zn, Cu, Ni and Cr in soil of urban road of Quanzhou City were analyzed and investigated to evaluate environmental quality based on health risk assessment model. The results showed that the soil of these urban roads has been polluted by heavy metals. Especially, the pollution of Zn and Cd was the most serious, has exceeded the secondary standard of the environmental quality standard for soils. The order of non-cancer hazard indexes of heavy metals in soil was As > Pb > Cr > Cd > Cu > Ni > Zn, and the order of carcinogen risks of heavy metals was As > Cd. The non-cancer hazard indexes and carcinogen risks of heavy metals were both lower than their threshold values. They were not to be direct threats to people health.

Assessment of toxicity of heavy metal contaminated dustfall in different city zones of QuanZhou by toxicity characteristic leaching procedure

The contents of some heavy metals (Cu, Zn, Pb, Cd and Cr) in dustfall samples from different city zones of Quanzhou were analyzed and their toxicity was assessed by toxicity characteristic leaching procedure (TCLP), which was developed by USEPA. The TCLP method is a currently recognized international method for evaluation of heavy metal pollution in dustfall. The available levels of Cu, Zn, Pb, Cd and Cr were 2.59–63.20, 9.28–3378, 0.15–345.0, 0.08–2.98 and 0.63–9.70 mg·kg−1, respectively, while their international standard were 15, 25, 5, 0.5 and 5 mg·kg−1, respectively. The results showed that the dustfall in different city zones of Quanzhou was polluted by Cu, Zn, Pb, Cd and Cr to some extent, especially by Zn and Pb, followed by Cd, Cu and Cr. The available contents of heavy metals by TCLP method presented different correlations with their total contents, with the correlation coefficients ranging from 0.03 to 0.77.