Correlations that allow determination of gas film mass transfer coefficients (kGat , kGaw) and liquid film mass transfer coefficients (kLaw) for packing materials used in biofilters and biotrickling filters for air pollution control are presented. Lava rock, polyurethane foam cubes (PUF), Pall rings, porous ceramic beads, porous ceramic Raschig rings, and various compost–woodchips mixtures were...

Background: In order to protect the environment, humans are required to comply with environmental ethics, as set forth in environmental laws. Unfortunately, oil pollution has had many negative impacts on the Earth's environment in recent years, so various countries have been examining and deciding on new environmental laws over many years. Many decisions overlap with international law and have ...

Colloidal semiconductor nanocrystals have attracted continuous worldwide interest over the last three decades owing to their remarkable and unique size- and shape-, dependent properties. The colloidal nature of these nanomaterials allows one to take full advantage of nanoscale effects to tailor their optoelectronic and physical-chemical properties, yielding materials that combine size-, shape-,...

This research was motivated by the existence of environmental pollution problems caused manufacturing activities that use styrene plastic materials as part packaging for electronic products. To solve these problems, innovative uses environmentally-friendly from natural resources are necessary. The substitution synthetic used in is vitally important effort to eliminate negative effects pollution...

Plastic waste is a serious problem for the survival of all creatures on Earth. Recycling one solution to reduce negative impact environmental pollution caused by plastic waste. A lot that pollutes Earth comes from bottle (PET). There had been many studies discussed use (PET); however, this research used (PET) as geocell subgrade reinforcement. To date, still rare. The main purpose study was det...

There has been considerable interest in the development and production of biodegradable polymer to solve the current problem of pollution caused by the continuous use of synthetic polymer of petroleum origin. Polyhydroxyalkanoates (PHAs) are known to be accumulated as intracellular inclusion in some bacteria. The materials properties exhibited by PHAs, ranging from stiff, brittle to rubber-like...

This research was motivated by the existence of environmental pollution problems caused manufacturing activities that use styrene plastic materials as part packaging for electronic products. To solve these problems, innovative uses environmentally-friendly from natural resources are necessary. The substitution synthetic used in is vitally important effort to eliminate negative effects pollution...