Download Environmental Chemistry for a Sustainable World: Volume 1: by Chin Wei Tan, Kok Hong Tan, Yit Thai Ong, Abdul Rahman PDF

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 technological know-how aimed toward decoding primary mechanisms ruling the behaviour of pollution in ecosystems. employing this information to present environmental matters ends up in the remediation of environmental media, and to new, low strength, low emission, sustainable strategies. Nanotechnology purposes for replacement energies comparable to solar energy, gasoline cells, hydrogen and lithium batteries are reviewed within the first part. fresh investigations on carbon nanotubes, nanocatalysts and cyclodextrins divulge unparalleled concepts to watch and fresh toxins corresponding to greenhouse gases, heavy metals, insecticides, pathogens taking place in water, air and soil. the second one part reports the dangers for human overall healthiness of serious toxins reminiscent of 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 offers novel insights on toxins historical past because the starting of the anthropocene.

This e-book could be a worthwhile resource of data for engineers and scholars constructing novel utilized concepts to observe and fresh toxins in air, wastewater, soils and sediments.

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Extra info for Environmental Chemistry for a Sustainable World: Volume 1: Nanotechnology and Health Risk

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With the rapid development in both nanotechnology and biotechnology, it is now possible to combine these two exciting fields to modulate the physical properties of nanomaterials with the molecular recognition and catalytic functional properties of biomaterials. To date, CNTs have been impregnated with chitosan hydrogel beads for the removal of Congo Red (Chatterjee et al. 2010). The impregnation of CNTs 1 Carbon Nanotubes Applications: Solar and Fuel Cells, H2 Storage, Li Batteries... 29 with chitosan had proven to be an effective biosorbent material with enhanced adsorption capacity for Congo Red as the amino and hydroxyl functional groups of chitosan show high affinity towards many classes of dyes (Bhatnagar and Sillanpää 2009), in addition to the improved mechanical properties of chitosan by adding CNTs.

2005). In addition, the alignment and the length of CNTs also have a significant effect on the electrochemical properties of CNTs, in which aligned CNTs and shorter length of nanotube show better electrochemical properties. Purification of CNTs, such as chemical oxidation or thermal treatment leads to the partial oxidation of CNTs to produce groups at the tube ends and defects along the sidewall (Gong et al. 2005). A pair of redox peaks is observed when the purified CNTs are subjected to cyclic voltammetry (CV) and the peaks are attributed to the redox process of oxygenated functional groups at the CNTs (Luo et al.

Preparation of TiO2-MWCNT composites on an indium-tin oxide (ITO) glass substrate for working electrode in DSSC by using simple direct mixing method has been reported, in which the authors claimed that the technique is suitable for large scale production (Sawatsuk et al. 2009). 025 wt%. The reproducibility of CV measurements up to 50 cycles showed that the direct mixing method is suitable for large scale production of electrodes with sufficient stability for DSSC. Recently, a novel solar cell was reported based on donor-acceptor nanoarchitecture on semiconducting electrodes, where CNTs were used as the electron acceptor material due to the unique one-dimensional nanostructure as the ideal charge transport pathway in the photoactive layer (Imahori and Umeyama 2009; Umeyama and Imahori 2008).

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