基于超声耦合Fenton技术,以剩余污泥为载体,同时将污泥活化脱水和金属负载过程整合,成功制备出一种高效稳定的非均相Fenton催化剂,对其结构和性能进行了表征,并探究了所制备催化剂对亚甲基蓝(MB)模拟废水的降解行为。结果表明,Fe元素能有效掺杂于污泥中,并在主要以Fe2O3的形式存在,且负载铁元素和载体中二氧化硅间形成了Si-O-Fe键,保证了催化的稳定性。在初始pH为4,反应时间80 min,H2O2投加量为4 m L/L,催化剂用量0.5 g/L的优化降解条件下,催化剂对MB的降解率可达98.7%;且重复利用5次后仍能保持较好的循环稳定性。体系中H2O2可以产生具有强氧化性的·OH,作用于吸附在催化剂表面的MB生成反应中间产物,后进一步被降解为CO2和H2O。
2-Carbonyl propionic acid-4-methyl benzoyl hydrazone(PAMH) has been synthesized by using 4-methyl benzoyl hydrazine and pyruvic acid as the chemicals and acetic acid as phase transfer catalyst under microwave radiation. Then the PAMH and Tb Cl3·6 H2 O are placed in the methanol/acetone/water(3:2:4) mixture for coordination reaction, getting the Schiff complex Tb(PAMH)3. The crystal structure is characterized by elemental analysis, X-ray Diffraction(XRD) and infrared spectrum. The compound crystallizes in the monoclinic space group P21/n, with a = 1.4770(4), b = 1.2864(3), c = 1.9287(5) nm, β = 92.06(3)o, V = 3.6623(15) nm3 and Z = 4. Tb(III) ion is nona-coordinated by three completely deprotonated PAMH ligands in a tricapped trigonal prism geometry, leaving a zero-dimensional mononuclear configuration. The optical properties and thermal stability are studied by ultraviolet spectrum, fluorescence spectra and thermogravimetric analysis(TGA). The antibacterial activities of the ligand and rare-earth complex are preliminarily studied, and found they have certain antibacterial activity on fusarium solani, and the complex is obviously more effective in suppressing fusarium solani than the ligand.
