Platinum group metals, such as Pd and Pt, found in three-way catalyst converters were recycled a two-step method: hydrodynamic cavitation followed by sonoelectrochemical dissolution. High shear forces obtained using convergent nozzle with throat diameter of 0.2 mm, feeded plunger pump at pressure 60 MPa. Cavitating submerged jets acted locally on the water dispersed waste catalyst. As-obtained ...

The crystal structure of katayamalite has been determined by Patterson method and refined by the least-squares method using single crystal diffractometer data, giving R = 0.057 for 5785 reflections. Formula: (K,Na)Li.Ca,(Ti,Fe'+,Mn)2[Si60'8].(OH,F)2' Cell dimensions: a 9.721(2), b 16.923(3), c 19.942(3)A, a 91.43(10t, iJ 104.15(11t, 'Y 89.94(10t, space group Cl, Z = 4; or a 9.763(2), b 9.721(2)...

The catalytic ozonation of the herbicide metolachlor (MTLC) was tested using carbon nanomaterials as catalysts. Multiwalled carbon nanotubes were used in semi-batch experiments and carbon nanofibres grown on a honeycomb cordierite monolith were tested in continuous experiments. The application of the carbon catalyst was shown to improve the mineralization degree of MTLC and to decrease the toxi...