Political Ecology

Carbon nanotubes (CNTs) were synthesized from polyethylene using a pyrolysis–combustion technique. Pre- or post-consumer polyethylene (in strips, pellets or ground particles) was pyrolyzed to gaseous products, which were then combined with an oxygen-containing gas and auto-ignited to create a fuel-rich flame. The combustion effluent was used to synthesize multi-wall CNTs using stainless-steel wire mesh as [...]

Managed Aquifer Recharge (MAR) is becoming an attractive option for water storage in water reuse processes as it provides an additional treatment barrier to improve recharged water quality and buffers seasonal variations of water supply and demand. To achieve a better understanding about the level of pathogenic microorganisms and their relation with microbial indicators in [...]

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Waste polyethylene terephthalate (PET) bottles collected by source-segregation recycling schemes can be treated by mechanical and chemical means to remove any contaminants. The cleaned PET can then be melted and formed into pellets with the same physical properties as virgin PET. Full-scale trials have shown that this reprocessed material can be used with virgin PET [...]

We find that total consumption of PET resin grew at 2.7% per year over the period of the study, reaching 5.01 million metric tons in 2007. This growth was driven largely by the beverage packaging market, which accounted for 55% of consumption in 2007. About a quarter of PET bottles are collected for recycling, a [...]

Solid waste management is gaining significant importance with the ever-increasing quantities of waste materials generated these days. With increased environmental awareness and its potential hazardous effects, recycling/utilization of these materials have become an attractive alternative to disposal. Some of these waste and hazardous materials could possible be used in cement-based materials. One of such waste [...]

The team for the first time isolated sufficient quantities of purified vanadium nitrogenase to subject it to comprehensive tests. One of these involved exposing the enzyme to carbon monoxide – a potent inhibitor of nitrogen fixation in the molybdenum version of the enzyme. They discovered by chance that in a total atmosphere of carbon monoxide, [...]