FeOOH@沙棘炭非均相Fenton降解盐酸四环素

Heterogeneous Fenton Degradation of Tetracycline Hydrochloride by FeOOH@Seabuckthorn Branches Carbon

废弃沙棘枝条经热解碳化制得沙棘炭,以沙棘炭为生物质载体,经一步水热负载FeOOH,获得FeOOH@沙棘炭复合催化剂。采用SEM和XRD对复合催化剂结构进行了表征;研究了FeOOH@沙棘炭非均相Fenton降解盐酸四环素(HCl-TC),考察了pH值、H_2O_2浓度、FeOOH@沙棘炭用量和HCl-TC的初始浓度对降解反应的影响。结果表明,纺锤形的FeOOH成功负载到沙棘炭生物质表面,增加了沙棘炭的粗糙度,构建起非均相Fenton体系。当pH值为2、H_2O_2浓度为3.5mol·L^(-1)、催化剂用量为3.0g·L^(-1)时,FeOOH@沙棘炭非均相Fenton降解HCl-TC废水表现出较好的降解效率。FeOOH@沙棘炭复合催化剂具有较好的重复使用性。

FeOOH@Seabuckthorn branches carbon composites were prepared by using seabuckthorn bran-ches carbon obtained by pyrolysis as bio-template through hydrothermal method. The obtained products werecharacterized by SEM and XRD. The Fenton degradation of tetracycline hydrochloride（HC1-TC） was examinedin the presence of FeOOH@seabuckthorn branches carbon. Effects of pH value, H20z concentration, dosage ofFeOOH@seabuckthorn branches carbon and initial concentration of HC1-TC on the degradation reaction wereinvestigated. Results indicated that the loading of many spindle-like FeOOH nanorods resulted in a rough sur-face togographic features of FeOOH@ seabuckthorn branches carbon, building up heterogeneous Fenton sys-tem. Moreover, the composite catalysts demonstrated better catalytic performance for removal of HC1-TCwastewater under the optimal operational parameters of pH value 2, H2Oz concentration 3.5 mol. L-1, anddosage of catalysts 3.0 g · L-1. FeOOH@Seabuckthorn carbon composite catalysts also possessed good repeat-able practicality.