摘要
制备了负载在Na Y分子筛上的Fe Cu Mn Y复合催化剂,并对其在非均相UV Fe Cu Mn Y H2O2体系中催化氧化4BS染料废水进行了研究.结果表明,非均相UV Fe Cu Mn Y H2O2体系对4BS染料废水的处理具有很高的效率.在基准条件下,反应时间为20min时,废水中4BS的去除率达到了93 7%.与均相UV Fenton体系不同,非均相UV Fe Cu Mn Y H2O2体系在碱性条件下(pH=10 5)仍可高效去除CODCr.动力学研究得到催化氧化4BS废水的模型方程,该模型可以为非均相UV Fe Cu Mn Y H2O2体系处理高色度的实际染料废水提供指导.
The homogeneous UV/Fenton system's pH had to be adjusted to a limited range (3～5) and the Photo-Fenton process requires recovery of iron, so operation cost in chemicals and labor has to be added. In order to widen the application of Fenton-type oxidation processes, these drawbacks have to be overcomed by immobilization of ferric ion. Investigations showed that other transition metal ions, due to their variety of valence could replace ferric ion and serve as a like-Fenton reagent. Furthermore, different kinds of transition metal ions and their ratio in the UV/like-Fenton process will favorably affect the degradation of contamination significantly. In this article, the heterogeneous Fe-Cu-Mn-Y catalyst was developed by immobilizing Fe^(2+), Cu^(2+), Mn^(2+) on Na-Y zeolite. The degradation of 4BS has been investigated by the heterogeneous UV/Fe-Cu-Mn-Y/H_2O_2 process. The results indicated that the heterogeneous UV/ Fe-Cu-Mn-Y/H_2O_2 process shows high proficiency in catalytic oxidizing 4BS, whose 4BS removal rate reached 93.7% when the reaction time is 20 min under the standard experimental conditions (as defined in the article). Deferent from the homogeneous one, the heterogeneous process remains higher efficiency of removal of COD_(Cr) and 4BS, even in alkaline solution (pH reached 10.5). Kinetic model was correlated, which could provide the direction of the practical treatment of such deep color dye effluents.
出处
《环境科学学报》
CAS
CSCD
北大核心
2004年第6期1032-1038,共7页
Acta Scientiae Circumstantiae
基金
国家自然科学基金资助课题(20176053)
