Daily Archives: June 7, 2017

“Hockey Stick” Global Temperature Increase a Myth

“Just within the last 5 months, 58 more papers and 80 new graphs have been published that continue to undermine the popularized conception of a slowly cooling Earth temperature history followed by a dramatic hockey-stick-shaped uptick, or an especially unusual global-scale warming during modern times. ” click here for the NoTricksZone

Removal of Quinolone Antibiotics from Water Using Activated Carbon

Fu H, Li X, Wang J, Lin P, Chen C, Zhang X, Suffet IHM. Activated carbon adsorption of quinolone antibiotics in water: Performance, mechanism, and modeling. Journal of environmental sciences (China). 2017 Jun;56:145-152. doi: 10.1016/j.jes.2016.09.010.

The extensive use of antibiotics has led to their presence in the aquatic environment, and introduces potential impacts on human and ecological health. The capability of powdered activated carbon (PAC) to remove six frequently used quinolone (QN) antibiotics during water treatment was evaluated to improve drinking water safety. The kinetics of QN adsorption by PAC was best described by a pseudo second-order equation, and the adsorption capacity was well described by the Freundlich isotherm equation. Isotherms measured at different pH showed that hydrophobic interaction, electrostatic interaction, and π-π dispersion force were the main mechanisms for adsorption of QNs by PAC. A pH-dependent isotherm model based on the Freundlich equation was developed to predict the adsorption capacity of QNs by PAC at different pH values. This model had excellent prediction capabilities under different laboratory scenarios. Small relative standard derivations (RSDs), i.e., 0.59%-0.92% for ciprofloxacin and 0.09%-3.89% for enrofloxacin, were observed for equilibrium concentrations above the 0.3 mg/L level. The RSDs increased to 11.9% for ciprofloxacin and 32.1% for enrofloxacin at μg/L equilibrium levels, which is still acceptable. This model could be applied to predict the adsorption of other chemicals having different ionized forms.

Paris Agreement will do Little to Reduce Global Temperatures

“Senator Rand Paul has backed up Trump’s decision to exit Paris by reiterating that the Paris Agreement would do little to reduce global temperatures. His interview however has attracted the expected kickbacks from the alarmist fraternity.” click here