Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei City, 10617, Taiwan.
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei City, 10617, Taiwan.
Chemosphere. 2018 Jun;200:419-426. doi: 10.1016/j.chemosphere.2018.02.123. Epub 2018 Feb 22.
Hexabromocyclododecane (HBCD), a commonly used brominated flame retardant (BFR), has been listed as a persistent organic pollutant (POP). In order to remediate HBCD in the environment, the influence of microscale zerovalent iron (MZVI) on the HBCD degrading microcosm was evaluated. In the acclimated microcosm collected from river sediment, 49% of HBCD was initially removed through adsorption and then 30% of HBCD was biodegraded through non-debromination processes. In contrast to MZVI only, over 60% of HBCD was gradually degraded by MZVI through a debromination reaction. In the microcosm-MZVI combined system, the biodegradation ability of the microcosm was inhibited. The aqueous chemistry was changed by the addition of MZVI, which led to the alteration of microbial composition and biodegradation ability. These better understandings can facilitate an evaluation of the impact of MZVI on HBCD biodegradation when ZVI was used to remediate this BFR.
六溴环十二烷（HBCD）是一种常用的溴系阻燃剂（BFR），已被列为持久性有机污染物（POP）。为了修复环境中的 HBCD，评估了微尺度零价铁（MZVI）对 HBCD 降解微环境的影响。在从河底沉积物中采集的驯化微环境中，HBCD 通过吸附作用去除了 49%，然后通过非脱溴过程生物降解了 30%。与仅使用 MZVI 相比，超过 60%的 HBCD 通过脱溴反应逐渐被 MZVI 降解。在微环境-MZVI 联合系统中，微环境的生物降解能力受到抑制。添加 MZVI 会改变水相化学性质，从而导致微生物组成和生物降解能力的改变。这些更好的理解可以促进评估 MZVI 对 HBCD 生物降解的影响，当使用 ZVI 修复这种 BFR 时。
