Research on these contaminant effects suggests that the best possible solution to allowing fuel cells to operate in contaminated environments is by filtration of the harmful contaminants from the cathode air.
Nitrate-N is an indicator of contamination from septic systems or wastewater recharge that may include potentially harmful contaminants such as synthetic organic chemicals (Janik 1987).
He said that where dredging was being considered "every case is different"; the cost and the potential for releasing harmful contaminants by dredging are two frequent objections.
Back on Earth, manufactured products are sampled to ensure consumer safety; foods are sampled to assay nutrients and to monitor pesticide residues and other potentially harmful contaminants.
Whether set locally, nationally, or internationally, government standards typically set maximum concentrations of harmful contaminants that can be allowed in safe water.
In 2015, a much stronger regulation, the Effluent Limitations Guidelines rule, set new caps on the amount of toxic metals and other harmful contaminants that coal-fired steam electric power plants could sluice into ponds or discharge into waterways.
They are scientists at the Energy Department's Lawrence Berkeley National Laboratory, and the morning's experiment concerned another kitchen conundrum, a fight against physics: how to remove harmful contaminants caused by cooking.
But like many others here, he worries that treating the water, though it may remove harmful contaminants, will also strip away some of the natural fertilizers that even the authorities here say have helped make this valley so productive.
Potentials of modern water treatment technologies are being explored in the removal of harmful contaminants that have previously made industrial wastewater unfit for reuse to make the water perfectly safe for a variety of reuse purposes.
Larger fish predators may contain significant levels of methyl mercury, and other potentially harmful contaminants, such as polychlorinated biphenyls (PCBs) and dioxins that bioconcentrate in the aquatic food chain.
