Prof. Shanquan Wang (汪善全)，
School of Environmental Science and Engineering, Sun Yat-Sen University，China
His research focus on functional environmental anaerobic microorganisms and their conversion of persistent organic pollutants (POPs). We integrate microbial cultivation, metagenomics, molecular techniques and bioreactor operation to gain fundamental insights of our complex biosystems (e.g. bioremediation sites and anaerobic digesters) specifically from molecular-, cellular-, community- to system-levels. The generated knowledge on these reductive processes will be further employed to devise novel methods, techniques and products for our environmental engineering purposes.
Spatial distribution, bioconversion and ecological risk of halogenated persistent organic pollutants in contaminated urban rivers: a nationwide study in China
Surface sediments of polluted urban rivers can be a reservoir of hydrophobic persistent organic pollutants (POPs). In our study, we comprehensively assessed the contamination of two groups of POPs, i.e., Polychlorinated Biphenyls (PCBs) and Polybrominated Diphenyl Ethers (PBDEs), in 173 polluted urban rivers in China. Evaluation on the concentrations and spatial distribution of PCBs and PBDEs showed their similar spatial distribution patterns but very different contamination levels in surface sediments. In contrast to the persistence of PBDEs, significant correlation (p<0.005) between organohalide-respiring bacteria (OHRB) and PCBs, together with remarkable changes in enantiomeric fractions of chiral PCBs, suggested indigenous bioconversion of PCBs in the polluted urban rivers, particularly the involvement of yet-to-be-characterized lineages of Dehalococcoidia in microbial reductive dechlorination of PCBs. Risk assessment indicated that the urban river sediments could pose high ecological risk of exposure to deca-/penta-BDEs for aquatic livings. Our study provided unprecedented insights into contamination, conversion and ecological risk of PCBs and PBDEs in nationwide polluted urban rivers in China.