The performance of trichloroethene (TCE) degradation was significantly improved with the addition of FeS in nanoscale calcium peroxide (nCP) environment and the enhancement of HO• generation in nCP/Fe(II)/FeS system was confirmed by comparison with nCP/Fe(II) and nCP/FeS systems. The role of FeS in nCP/Fe(II)/FeS system demonstrated that the majority of reactive oxygen radicals (ROSs) was generated on the catalyst surface due to the heterogeneous reaction through FeS activated nCP in one hand, and the reductive FeS could promote TCE degradation by regenerating Fe(II) from Fe(III) in the other hand. The probe as well as scavenger test results suggested that the major ROSs was HO• rather than O₂⁻•. Over 91.5% TCE could be degraded at the molar ratio of 2/2/4/1 of nCP/Fe(II)/FeS/TCE, in which more than 95.5% TCE was dechlorinated. The effect of surfactants on TCE degradation was evaluated. In contrast, further investigation found that BTEX removal was inhibited with the addition of FeS. In conclusion, this study revealed the well function and fundamental synergistic mechanism of FeS. Moreover, the degradation of TCE in actual groundwater confirmed that nCP/Fe(II)/FeS technique has a great advantage and potential in TCE contaminated groundwater remediation in ISCO practice.

在纳米级过氧化钙（nCP）环境中添加FeS可以显着改善三氯乙烯（TCE）的降解性能，与nCP / Fe（相比）证实了nCP / Fe（II）/ FeS体系中HO•生成的增强。 II）和nCP / FeS系统。FeS在nCP / Fe（II）/ FeS系统中的作用表明，一方面由于FeS活化的nCP的异相反应，大部分活性氧自由基（ROSs）生成在催化剂表面，还原性FeS可以促进另一方面，通过从Fe（III）再生Fe（II），TCE降解。探头以及清道夫的测试结果表明，主要的罗斯•HO，而不是Ø ₂ ^-•。在nCP / Fe（II）/ FeS / TCE的摩尔比为2/2/4/1时，超过91.5％的三氯乙烯可被降解，其中95.5％以上的三氯乙烯被脱氯。评价了表面活性剂对TCE降解的影响。相反，进一步的研究发现，添加FeS会抑制BTEX的去除。总之，这项研究揭示了FeS的良好功能和基本的协同机制。此外，TCE在实际地下水中的降解证实了在ISCO实践中，nCP / Fe（II）/ FeS技术在TCE污染的地下水修复中具有巨大的优势和潜力。