Study of DDT and its derivatives DDD, DDE adsorption and degradation over Fe-SBA-15 at low temperature.
Mesoporous SBA-15 with different Fe2O3 loading were synthesized by an in-situ coating progress for removals of dichlorodiphenyltrichloroethane (DDT) and its derivatives, i.e., 1,1-dichloro-2,2-bis-(p-chlorophenyl)ethane (DDD) and 1,1-dichloro-2,2-bis-(4-chloro -phenyl) ethane (DDE). The results from XRD (X-ray diffractometer), TEM (transmission electron microscopy) indicated that the iron could be well dispersed on SBA-15 within 6 wt.% Fe2O3 loading. Nitrogen adsorption-desorption tests indicated that the synthesized materials were characterized by ordered meso-structure, high surface area and large pore volume. DDTs were removed from aqueous media in 12-hr treatment and high removal efficiency of DDTs was achieved at over 94%. DDTs could be completely degraded at 350 degrees C under the existence of SBA-15 with 4 wt.% Fe2O3 loading. The final degradation products of DDT were dichlorobenzophenone (DCB) and bis-(4-chloro-phenyl) methane (DDM), suggesting a complete dechlorination from trichloromethyl.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. wanghailin@rcees.ac.cn
Hailin
H
Wang
Hua
H
Tian
Zhengping
Z
Hao
D002254:Carbonates / Q000737:chemistry*; D002384:Catalysis; D003634:DDT / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry; D005019:Ethyl Ethers / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D010575:Pesticides / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
D002254:Carbonates; D004785:Environmental Pollutants; D005019:Ethyl Ethers; D005290:Ferric Compounds; D010575:Pesticides; C509969:SBA-15; D013440:Sulfides; C482610:diethyldithiodicarbonate disulfide; C052560:bis(2-chloro-1-methylethyl) ether; C000499:ferric oxide; D012822:Silicon Dioxide; D003634:DDT