Yan Meng-Yue, Pang Zhi-Hua, Li Xiao-Ming, Chen Jian-Yu, Luo Jun
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
Huan Jing Ke Xue. 2013 Jun;34(6):2249-55.
The removal of tetrabromobisphenol A (TBBPA) in methanol aqueous solutions by nanoscale zero valent iron supported on organobentonite (NZVI-CMT) was studied. The effects of temperature, initial concentration of TBBPA and the dose of NZVI-CMT on the degradation and debromination of TBBPA were investigated. The removal rate by NZVI-CMT reached 97.5% within 12 hours at 25 degrees C, when the initial concentration of TBBPA was 10 mg x L(-1). And the removal rate of NZVI-CMT was higher than those of two simple materials, namely organobentonite (CMT) and nanoscale zero valent iron (NZVI), as well as the sum of those two simple materials. In addition, NZVI-CMT exhibited a better reusable attribute, and the rate of the materials remained above 90% after being used for 3 times. Based on the identification of degradation products and analysis of the TBBPA removal by NZVI-CMT, the main reaction mechanism was suggested as adsorption and debromination, and higher reaction temperature was preferable for debromination.
研究了有机膨润土负载纳米零价铁（NZVI-CMT）对甲醇水溶液中四溴双酚A（TBBPA）的去除效果。考察了温度、TBBPA初始浓度和NZVI-CMT投加量对TBBPA降解和脱溴的影响。当TBBPA初始浓度为10 mg·L⁻¹时，在25℃下，NZVI-CMT在12小时内的去除率达到97.5%。且NZVI-CMT的去除率高于两种单一材料，即有机膨润土（CMT）和纳米零价铁（NZVI），也高于这两种单一材料去除率之和。此外，NZVI-CMT表现出较好的可重复使用性，使用3次后材料去除率仍保持在90%以上。基于降解产物的鉴定和NZVI-CMT对TBBPA去除的分析，提出主要反应机理为吸附和脱溴，较高的反应温度有利于脱溴。
