摘要
为研究多相Fenton体系降解有机污水过程的放热规律,为污水处理的能源化利用提供技术支撑,本文以半焦(SCe)为载体,制备了Fe2O3@SCe新型复合材料,并对复合材料进行了BET、FTIR、XRD、SEM表征,研究了Fe2O3@SCe/H2O2多相Fenton体系处理邻苯二胺(OPD)模拟废水的降解性能和放热规律.结果表明,Fe2O3均匀负载于SCe颗粒表面,Fe2O3@SCe复合材料保留了改性SCe的多孔形态和强吸附性,在3.1~8.9的pH值范围内均表现出较高的催化活性;Fe2O3@SCe/H2O2多相Fenton体系在去离子水中自身分解和在邻苯二胺模拟废水的降解反应都释放了大量的热量,在[OPD]=0.04mol/L;pH=7.8;T0=30℃;[H2O2]=0.25mol/L;[Fe2O3@Sce]=533g/L;t=180min反应条件下的溶液温度升高数值为7.1℃,降解率为88.2%;H2O2的投加浓度是影响反应放热量的主要因素.
Exothermic laws of a heterogeneous Fenton system in the degradation of organic sewage were investigated to facilitate the energy utilization in sewage treatment practices.In this study,semicoke(SCe)was used as the carrier to prepare a novel Fe2O3@SCe composite material,which was then characterized by Brunauer,Emmett,and Teller surface area analysis,Fourier-transform infrared spectroscopy,x-ray diffraction,and scanning electron microscopy.The degradation performance and exothermic laws of the Fe2O3@SCe/H2O2 heterogeneous Fenton system for the treatment of o-phenylenediamine(OPD)organic sewage were studied.The results showed that Fe2O3 was uniformly loaded on the surface of the SCe particles.The Fe2O3@SCe composite material retained its porous form and exhibited strong adsorption capacity and high catalytic activity over a wide pH range(3.1~8.9),an effective broadening of the pH range of the classic homogeneous Fenton reaction.Both the dissolution reactions in Fe2O3@SCe/H2O2 heterogeneous Fenton and the degradation reactions of Fe2O3@SCe/H2O2 and simulated OPD sewage released large amounts of heat.The temperature of the solution reached 7.1℃higher and was accompanied by a degradation efficiency of 88.2%under the following experimental conditions:[OPD]=0.04mol/L,pH=7.8,T0=30℃,[H2O2]=0.25mol/L,[Fe2O3@SCe]=533g/L,and t=180min.The concentration of H2O2 was found to be the dominant factor affecting exothermic heat release during the heterogeneous Fenton reaction.
作者
闫云涛
张柯
毛岩鹏
董勇
YAN Yun-tao;ZHANG Ke;MAO Yan-peng;DONG Yong(National Engineering Laboratory for Reducing Emissions from Coal Combustion,Engineering Research Center of Environmental Thermal Technology of Ministry of Education,Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization,School of Energy and Power Engineering,Shandong University,Jinan 250061,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2020年第8期3375-3384,共10页
China Environmental Science
基金
国家自然科学基金资助项目(U1906232)
山东省自然科学基金资助项目(ZR2018MEE030)。
关键词
芬顿
热能
催化剂
吸附
降解
污水
fenton
thermal energy
catalyst
adsorption
degradation
sewage
