This work aimed at developing a natural compound-based hydrogel adsorbent to remove diclofenac as a model pharmaceutical from water.

In this study, we improved the catalytic performance of manganese porphyrin encapsulated HY zeolite for alkene epoxidation reaction. For this purpose, Manganese tetra pyridyl porphyrin encapsulated into modified dealuminated Y zeolite (MnTPP-MDAZY) was synthesized using zeolite template synthesis method. This heterogenized catalyst was characterized by FT-IR, UV-Vis, XRD and atomic absorption spectra (AAS) technique. Catalyst loading was 0.263 mmol/g support. In this way, high catalyst loading is probably related to the decrease of the size of metalloporphyrin and the post-synthesis treatment. The latter one causes the increase of the diameter of the mesoporous structure as a result of the dealumination of zeolite with EDTA treatment. High catalyst loading efficiently enhances the epoxidation of alkenes.

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Chemical accidents are going more frequent with increasing industrialization and increased measured handling of large quantities of chemicals. They can cause major life and property losses and environmental impact if proper safety considerations are neglected. This emphasizes the importance of the consequence analysis of the risks involved with the chemical plants. The purpose of this study is to analyze the consequence of major accidents of a case study in a spherical butane tank in the port of Bandar Imam (Iran). In this work, three possible failure scenarios were studied including (a) leakage from the loading line, (b) leakage from the tank manhole (outlet line), (c) rupture in the spherical butane tank in order to model the incidents. The detailed analysis of the results provided essential and important recommendations that should be taken into account including minimum safe distance from the rupture center for different types of fire. The established recommendations of this work can be used for an effective preparedness of people for relevant risks and could be employed to increase the awareness of possible risks and major accidents.