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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY · 2011 ·Vol. 49 ·期 22 ·4721-4724 · IF 3.894

Continuous SET-LRP of acrylonitrile in iron tube without any ligand

Hou Chen,Min Zhang,Mengmeng Yu,Hongyan Jiang

Graphical Iron tube was applied as catalyst source in the design of continuous SET-LRP of AN without any ligand using BPN as initiator in NMP and DMF, respectively. First-order kinetics of polymerization with respect to the monomer concentration, linear increase of the molecular weight, and narrow polydispersity with monomer conversion showed the controlled radical polymerization characters. An increase in polymerization rate in NMP was observed compared with in DMF. The living feature of PAN was verified by chain extensions of PAN with MMA.

CAS / MDL: 872-50-4

研究领域: 化学工程 · 高分子科学

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JOURNAL OF HAZARDOUS MATERIALS · 2025 · IF 11.3

Iron pipe corrosion enhanced the transformation of iopamidol, a precursor of iodinated disinfection byproducts: The role of sulfate-reducing bacteria

Jun Hu,Zilong Zhang,Xinyuan Wu,Hao Zheng,Zhuce Cheng,Li Gong,Zhimin Qiang,Jianming Yu

Long-term use of iron pipes leads to inevitable corrosion due to chemical and biological processes, with sulfate-reducing bacteria (SRB) playing a significant role. The corrosion products generated will affect the transformation of micropollutants in pipe networks. This study investigated the effect of SRB-influenced corrosion (SIC) on the transformation of iodine-containing micropollutants, using iopamidol (IPM) as a model compound. The degradation rate of IPM in the presence of Fe bio (with SIC) was 2.3 times higher than that with Fe abio (without SIC). This enhancement was primarily attributed to accelerated and selective electron transfer facilitated by FeSx formation in the SIC process. The enhancement was more pronounced in presence of an appropriate amount of SO 4 2 (120 mg L −1 ), or under a weakly acidic condition (pH 6). The enhancement was further validated in real water, where the released iodide was converted into iodinated disinfection by-products (I-DBPs) and/or iodate (IO 3 − ), depending on the disinfectant used. This study offers an insight into the interplay between SRB-driven iron corrosion and iodine-containing pollutant transformation, contributing to a deeper understanding of micropollutant fate in corroded iron pipe networks.

CAS / MDL: 110-27-0

研究领域: 环境科学 · 微生物学

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Continuous SET-LRP of acrylonitrile in iron tube without any ligand

Iron pipe corrosion enhanced the transformation of iopamidol, a precursor of iodinated disinfection byproducts: The role of sulfate-reducing bacteria