施氏矿物对液相和土壤中苯酚的芬顿催化氧化效果

PERFORMANCE OF SCHWERTMANNITE IN FENTON-LIKE OXIDATION OF PHENOL IN LIQUID PHASE AND SOIL

施氏矿物(Sch)因其独特的高铁含量和结构特性,在类芬顿反应过程中对苯酚(C_(6)H_(5)OH)催化氧化过程表现出潜在的高反应性能。通过化学氧化方法合成多相类芬顿型催化剂Sch,并用于液相及污染土壤中的C_(6)H_(5)OH催化氧化降解过程。该合成矿物具有典型海胆状结构、有序形貌特征和特定孔径尺寸的微纳孔结构。研究Sch材料在水相和不同pH乙醇相中对C_(6)H_(5)OH氧化过程的催化效果发现,当pH<7时,C_(6)H_(5)OH去除率可达到98%。当Sch材料以1.25%或2.5%的质量分数添加到中性或近酸性C_(6)H_(5)OH污染土壤时,可使C_(6)H_(5)OH含量由初始值6.052 mg/kg降至0.2 mg/kg以下。该材料在苯酚污染土壤的实际治理修复工程中具有极大的应用前景。

Schwertmannite(Sch)presents high catalytic properties potential for phenol oxidation in a Fenton-like mechanism,because of its unique combination of Fe composition and structure characteristics.In this study,Sch was fabricated as a heterogeneous Fenton-like catalyst through chemical oxidation,for phenol degradation in polluted water and soil.The synthetic minerals have a typical sea-urchin-like structure and ordered morphology with unique channels of a specific size range.The catalytic performance of Sch for phenol oxidation in water and alcohol with various pH values was investigated.Under an acidic pH,nearly 98%of phenol was successfully removed.When Sch material was added to neutral or nearly acidic C_(6)H_(5)OH contaminated soil at a mass ratio of 1.25%or 2.5%,the concentration of C_(6)H_(5)OH could be reduced from 6.052 mg/kg to less than 0.2 mg/kg.The material had great potential application prospect in actual remediation projects of phenol polluted soil.