以消化污泥和硫酸亚铁铵为原料快速制备高效稳定的Photo-Fenton反应催化剂

Quick Preparation and Facile Synthesis of an Effective and Stable Heterogeneous Catalyst Combined with Digested Sludge and(NH_4)_2Fe(SO_4)_2 for Photo-Fenton Reaction

厌氧消化因其能将污泥中的有机物转化为沼气而备受关注。然而,经过厌氧消化后的沼渣即消化污泥仍含有高浓度的重金属和其他有害物质,给传统的污泥处理处置带来一系列的困难。该文通过一种简单的合成方法将消化污泥变成稳定高效的非均相催化剂。通过对比消化污泥+(NH4)2Fe(SO4)2和单纯消化污泥对RhB(罗丹明B)降解速率的影响,发现人为添加一定量的(NH4)2Fe(SO4)2,可以有效提高RhB的降解速率,使之在10 min后降解率达到80%,20 min内降解率达到95%,从而大大减少降解有机物所需要的时间。

Anaerobic digestion of sludge has recently received increased interest in many countries for its ability to transform organic matter into methane-rich biogas. However, digested sludge, the residue produced in digestion process, still contains high levels of heavy metals and other harmful substances that might make traditional disposal difficult. An alternative method was devised in the paper, of converting digested sludge into mesoporous material through a facile synthesis method that results in an effective and stable heterogeneous catalyst for photo-Fenton reaction. A comparison of the removal of rhodamine B （RhB） under different conditions showed that digested sludge with 1 mol/L （NH4）2Fe （SO4）2 solution stirred exhibited better catalyst activity. The degradation rate of RhBcan reach 80% in 10 min and 95% in 20 min.