By Chin Wei Tan, Kok Hong Tan, Yit Thai Ong, Abdul Rahman Mohamed (auth.), Eric Lichtfouse, Jan Schwarzbauer, Didier Robert (eds.)
Environmental chemistry is a quick constructing technology aimed toward interpreting basic mechanisms ruling the behaviour of toxins in ecosystems. employing this information to present environmental concerns results in the remediation of environmental media, and to new, low power, low emission, sustainable strategies. Nanotechnology functions for replacement energies corresponding to solar energy, gasoline cells, hydrogen and lithium batteries are reviewed within the first part. fresh investigations on carbon nanotubes, nanocatalysts and cyclodextrins reveal remarkable thoughts to watch and fresh toxins resembling greenhouse gases, heavy metals, insecticides, pathogens happening in water, air and soil. the second one part reports the hazards for human well-being of severe toxins similar to endocrine disruptors, dioxins and heavy metals contaminating seafood and sediments. An exhaustive evaluate of DDT isomers finds unforeseen mechanisms of DDT move to fishes. A bankruptcy on pollutant geochronology utilizing river sedimentary records presents novel insights on pollutants historical past because the starting of the anthropocene.
This e-book should be a beneficial resource of data for engineers and scholars constructing novel utilized strategies to observe and fresh pollution in air, wastewater, soils and sediments.
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Additional info for Environmental Chemistry for a Sustainable World: Volume 1: Nanotechnology and Health Risk
CV measurements were performed to investigate the cycling performances of the samples up to 100 cycles. Bare SnO2 electrode showed the highest initial discharge capacity of 1,665 mAhg−1 but poor cycling stability as the capacity gradually decreased until the 60th cycle due to the agglomeration of SnO2 particles and the associated volume change of SnO2 particles. 9 mAhg−1 and capacity retention of 402 mAhg−1 up to the 100th cycle. The improved performances of SnO2/MWCNT composite in terms of reversible capacity and cyclic capacity retention were attributed to CNTs as the intercalation host for SnO2 nanoparticles that reduced the absolute volume change and prevented the agglomeration of SnO2 nanoparticles.
01% CNTs since at higher concentration, CNTs tend to aggregate and block the access of Congo Red to the adsorption sites, (ii) pH value of 4 for Congo Red solution. It was also shown that the equilibrium isotherm of CNTs impregnated with chitosan hydrogel beads best fit the Langmuir isotherm model. Similar observations were obtained by investigating the adsorption efficiency of CNTs towards Procion Red MX-5B, where the adsorption capacity decreased with increased CNTs dosage and pH (Wu 2007). However, the adsorption capacity of CNTs increased with temperature suggesting that the adsorption of dyes into CNTs was an endothermic process.
Both CV and galvanostatic charge/discharge measurements indicated that the energy consumed by the internal resistance is reduced with good rate capability and improved effective energy storage in GNS/CNT/PANI composite electrode. The GNS/CNT/PANI composite exhibited a high specific capacitance of 1,035 Fg−1 but slightly lower than GNS/PANI composite, 1,046 Fg−1 as more PANI agglomerations were observed in GNS/CNT/PANI composite resulted in lower electrochemical utilization of PANI. However, the specific capacitance of GNS/CNT/PANI composite was larger than other porous carbon materials supported PANI composite and it exhibited excellent cycle stability with only 6% lost of initial capacitance up to 1,000 cycles.
Environmental Chemistry for a Sustainable World: Volume 1: Nanotechnology and Health Risk by Chin Wei Tan, Kok Hong Tan, Yit Thai Ong, Abdul Rahman Mohamed (auth.), Eric Lichtfouse, Jan Schwarzbauer, Didier Robert (eds.)