零价铁渗透性反应墙长期性能的影响因素

INFLUENCE FACTORS ON LONG-TERM PERFORMANCE OF ZERO-VALENT IRON PERMEABLE REACTIVE BARRIERS

介绍了零价铁渗透性反应墙(ZVI-PRB)长期性能的影响因素和潜在失效机理。指出设计缺陷、反应材料活性损失和不可逆的水力变化是ZVI-PRB失效的主要原因;而次生矿物沉淀、生物淤积、气体堵塞、氧化剂竞争和地球化学条件是ZVI-PRB潜在失效机理。

The factors influencing the long-term performance and potential failure mechanisms of zero-valent iron permeable reactive barriers（ZVI-PRB） were briefly summarized. Loss of reactivity,design flaws and adverse hydraulic change were pointed out to be the most common causes of the ZVI-PRB failures. Precipitation of secondary minerals,biofouling,gas clogging,competing of oxidizing agents and geochemical condition were pointed out as the potential failure mechanisms of long performance of ZVI-PRB.