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Polychlorinated biphenyls (PCBs) remain a significant environmental threat even though manufacturing of PCBs was discontinued 30 years ago. PCBs are toxic and suspected to be carcinogenic to humans and therefore are monitored carefully. Because of the chemical and thermal stability of PCBs in the environment and the continued use of transformers containing these chemicals, very sp ...

Conventionally, deep desulfurization in a refinery is accomplished by a multistep process including hydrodesulfurization (HDS) over CoMo/Al2O3 and NiMo/Al2O3 catalysts and subsequent removal of the H2S. The HDS process, however, is not suited well to produce ultraclean (essentially sulfur free) transportation fuels. At the severe reaction conditions required for deep desulfurization, the olefins a ...

Finite supplies of increasingly dirty petroleum, climate changes as a result of carbon dioxide emissions, and communities choking in pollution caused by manufacturing as well as their own solid wastes are pressing environmental problems. Because of these problems, sustainability is becoming a leading issue in the plastics industries; disposal options increasingly are limited in major markets such ...

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Polychlorinated biphenyls (PCBs) remain a significant environmental threat even though manufacturing of PCBs was discontinued 30 years ago. PCBs are toxic amd suspected to carcinogenic to humans and are therefore carefully monitored. Due to the chemical and thermal stability of PCBs in the environment and the continued use of rtansformers containing these chemicals, very specific regulations are ...

THE FEASIBILITY OF AMULTI-STAGED DIFFUSED AERATION TREATMENTSYSTEM FOR GASOLINE REMOVAL FROM CONTAMINATED HOUSEHOLD GROUND WATER SUPPLIES WILL BE STUDIED. EXPERIMENTS IN THE LABORATORY AND FIELD WILL IDENTIFY THE CONTROLLING GASOLINE COMPONENT COMPOUNDS FOR THE SYSTEM. THESE ADDITIVES ARE LIKELY TO INCLUDE METHYL TERTIARY BUTYL ETHER (MTBE) AND OTHER HIGHLY SOLUBLE AND POORLY ADSORBED COMPOUNDS. E ...

Finite supplies of increasingly dirty petroleum, climate changes due to carbon dioxide emissions and communities choking in pollution caused by manufacturing as well as their own solid wastes are pressing environmental problems. Because of these problems, sustainability is becoming a leading issue in the plastics industries - disposal options are increasingly limited in major markets such as Cali ...

Conventionally, deep desulfurization in a refinery is accomplished by a multi-step process including, hydrodesulfurization (HDS) over CoMo/Al203 and NiMo/AL203 catalysts and subsequent removal of the H2S. However, the HDS process is not suited well to produce ultra clean (essentially sulfur free) transportation fuels. At he severe reaction conditions required for deep desulfurization, the olefin ...

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