地下水酚类污染严重威胁水资源及饮用水安全，开展高效地下水原位修复技术研究尤为重要和迫切。目前，零价铁活化过硫酸盐（PS）被用于原位修复地下水有机污染，但因实际应用中非目标物（水分子等）消耗电子、次生矿物生成以及污染捕获效率低下等问题，降低了零价铁的利用效率。为了提高零价铁实际应用效率，本项目拟采用介孔碳包埋零价铁，以及还原改性炭壳表面官能团，制备具有高吸附性能的改性核壳化炭-零价铁材料（Fe0@HC），提高材料表面对苯酚和过硫酸根吸附，形成局部高浓度区，促进有效电子传递，并深入、系统的研究Fe0@HC活化PS降解地下水中苯酚的电子利用效率及作用机理，揭示炭层表面结构特征与活化性能间构效关系，洞悉Fe0@HC对动态环境下苯酚的捕获效率，阐明地下水环境下炭壳增强零价铁活化PS去除污染的内在机制，为发展零价铁活化PS原位修复地下水有机污染提供科学理论依据和方法支持，利于地下水饮用水安全保障。

Phenols pollution is a serious threat to groundwater resources and the safety of drinking water. To ensure the utilization of groundwater, a effective remediation technology to remove nitrobenzene is needed urgently. It has proved that the persulfate activated by zero-valent iron (ZVI) could remediate organic polluted groundwater efficiently. However, the utilization efficiency of ZVI is fairly low due to the consumption of electrons by non-target substances (H2O, etc.), the formation of secondary minerals and the low efficiency of pollution capture in situ remediation of groundwater. In the proposed research project, we aimed to tackle the problem by mesoporous carbon embedded ZVI and reduction-modified carbon shell surface functional groups. We hope to obtain modified core-shell carbon-ZVI materials (Fe0@HC) with high adsorption performance for activation persulfate degradation of phenol in groundwater. The adsorption, redox and electron transfer processes of phenol in the oxidation system will be systematically studied to clarify the structure activity relationships of Fe0@HC for the removal of pollutants. It will Further insight into the interception efficiency of Fe0@HC with pollutants in groundwater. In addition, It will help to reveal the internal mechanism of carbon shell to enhance the performance of ZVI activation PS to remove organic pollution in groundwater environment. This study could provide a theoretical supports for the remediation of organics contaminated groundwater, and improve the utilization efficiency of ZVI electron, which benefit to the safety of groundwater and drinking water.