The removal mechanism from the reductive dechlorination of trichloroethylene (TCE) by zero valent magnesium (ZVMg) in aqueous solution is systematically studied. Following the preparation and characterization of ball-milled micro ZVMg with graphite (ZVMg/C) particles, this paper evaluated the TCE reaction rates, pathways, utilization rates and aging effects of ZVMg/C particles in aqueous solution under uncontrolled pH conditions. Overall, 38 μM of TCE was transformed by 10 g/L of ZVMg/C to methane (62.51%) and n-hexane (11.86%) and ethane (7.40%) and other alkene and alkyne products through the catalytic hydrogenation pathway. The measured surface area normalized pseudo-first order rate constants (K_SA) were up to 9.31 × 10⁻² L/m²/h and the utilization rate of Mg⁰ accounted for around 60%. The K_SA were decreased to 1.90 × 10⁻² L/m²/h in case of ZVMg/C being exposed in the atmosphere for 6 days due to 7.3% reduction in the utilization rate of Mg⁰ from the initial 85.2%, and 5.11 × 10⁻² L/m² h in case of ZVMg/C aged in water for one day. The removal efficiencies of approximately 56%, 58% and 87% by 10 g/L of ZVMg/C were achieved in the contaminated groundwater comprising 38 μM of TCE, 43 μM of 1,2-dichlorobenzene and 8.12 μM of trichlormethane. Therefore, it is concluded that ZVMg/C is viewed as a potential and effective remediation reagent for the groundwater remediation.

系统研究了零价镁（ZVMg）对三氯乙烯（TCE）还原脱氯的去除机理。在制备并表征了带有石墨（ZVMg / C）颗粒的球磨微型ZVMg之后，本文评估了在不受控制的pH条件下ZVMg / C颗粒在水溶液中的TCE反应速率，途径，利用率和老化效果。总体而言，通过催化加氢途径，通过10 g / L的ZVMg / C将38μM的TCE转化为甲烷（62.51％）和正己烷（11.86％）和乙烷（7.40％）以及其他烯烃和炔烃产物。测得的表面积归一化拟一阶速率常数（K _SA）高达9.31×10 ^-2 L / m ²/ h，Mg ⁰的利用率约为60％。在ZVMg / C暴露于大气中6天的情况下，由于Mg ⁰的利用率从最初的85.2％降低7.3％，因此K _SA降至1.90×10 ^-2 L / m ² / h。ZVMg / C在水中老化一天的情况下为5.11×10 ^-2 L / m ² h。在包含38μMTCE，43μM1,2-二氯苯和8.12μM三氯甲烷的受污染地下水中，按10 g / L ZVMg / C的去除效率约为56％，58％和87％。因此，可以得出结论，ZVMg / C被认为是用于地下水修复的潜在和有效的修复剂。