[Research on removal of tetrabromobisphenol A from synthetic wastewater by nanoscale zero valent iron supported on organobentonite].
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.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. yanmengyuedh@163.com
Meng-Yue
MY
Yan
Zhi-Hua
ZH
Pang
Xiao-Ming
XM
Li
Jian-Yu
JY
Chen
Jun
J
Luo
D001546:Bentonite / Q000737:chemistry; D003198:Computer Simulation; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D011075:Polybrominated Biphenyls / Q000737:chemistry / Q000302:isolation & purification*; D062065:Wastewater / Q000737:chemistry*
D001546:Bentonite; D007501:Iron; D011075:Polybrominated Biphenyls; D062065:Wastewater; C020806:tetrabromobisphenol A