Xu Jie, Yun Xuehai, Li Meng, Tian Ye, Lei Xiaodong, Zhang Fazhi
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology Beijing 100029 China
RSC Adv. 2021 Sep 2;11(47):29537-29542. doi: 10.1039/d1ra05416c. eCollection 2021 Sep 1.
Heterogeneous Fenton systems have great application prospects in the catalytic degradation of organic wastewater; however, they are still not widely used in operation due to the difficulty of preparing catalysts in low yields and the high manufacturing cost. Herein, we report that a pristine iron-containing palygorskite clay can be used as a Fenton catalyst reagent without any retreatment. The composition, morphology, and structure of palygorskite clay, as well as the distribution and content of Fe element in palygorskite, were characterized several physicochemical techniques. The degradation reaction of phenol in water was carried out as a probe reaction for the palygorskite Fenton reagent. The effects of the palygorskite content, pH value, and hydrogen peroxide concentration on the degradation efficiency of phenol were studied. Under optimum operating conditions, the chemical oxygen demand (COD) degradation efficiency of phenol reaches 94% with a reaction temperature of 20 °C and a reaction time of 15 min.
非均相芬顿体系在有机废水的催化降解方面具有广阔的应用前景；然而，由于催化剂制备产率低且制造成本高，它们在实际应用中仍未得到广泛使用。在此，我们报道了一种原始的含铁坡缕石粘土无需任何再处理即可用作芬顿催化剂试剂。采用多种物理化学技术对坡缕石粘土的组成、形态和结构以及坡缕石中铁元素的分布和含量进行了表征。以水中苯酚的降解反应作为坡缕石芬顿试剂的探针反应。研究了坡缕石含量、pH值和过氧化氢浓度对苯酚降解效率的影响。在最佳操作条件下，反应温度为20℃，反应时间为15分钟时，苯酚的化学需氧量（COD）降解效率达到94%。
