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Latest Sorption Stories

2011-06-16 12:30:19

Researchers analyze data collection methods for examining the environmental impacts of pesticide use Assessing the environmental risk of pesticide use is an important, complex task that requires knowledge of the equilibrium sorption parameter. This helps researchers assess the risk of pesticides leaching into groundwater. For cost-effective assessments, this is usually determined through batch experiments that find the amount of pesticide in test soils as a function of concentration at a...

2008-09-21 03:00:24

By Bakouri, Hicham El Morillo, Jose; Usero, Jose; Ouassini, Abdelhamid ABSTRACT: This work proposes a viable remediation method based on the use of natural organic substances (NOSs) that characterize the Mediterranean region to improve the ecological system. A series of experiments, including variable conditions, such as temperature, pH, contact time, and pesticide concentration, were performed to demonstrate the efficiency of endosulfan sulfate removal from water by NOSs. Experimental...

2008-07-02 06:00:47

By Smith, S Takacs, I; Murthy, S; Daigger, G T; Szabo, A ABSTRACT: A phosphate complexation model is developed, in an attempt to understand the mechanistic basis of chemically mediated phosphate removal. The model presented here is based on geochemical reaction modeling techniques and uses known surface reactions possible on hydrous ferric oxide (HFO). The types of surface reactions and their reaction stoichiometry and binding energies (logK values) are taken from literature models of...

2008-06-14 03:00:15

By Englund, Karl Abstract Wood flour made from maple (Acer sp.) and 4 hybrid poplar (Populus spp.) (HP) clones was blended with polypropylene (PP) and extruded using a conical, twin-screw extruder to produce a profiled wood plastic composite (WPC). Ro-Tap screening and image analysis of the HP and maple flours prior to extrusion showed slight differences within particle size and aspect ratio, while thermogravimetric analysis (TGA) indicated similar thermal stability of the HP as with the...

2007-12-28 06:00:24

By Amuda, Omotayo Sarafadeen Ojo, Olumuyiwa Idowu; Edewor, Theresa Ibibia ABSTRACT The shell of the seed of Chrysophyllum albidum carbon was used to adsorb lead (Pb) from aqueous solution, the sorption process with respect to its equilibria and kinetics as well as the effects of pH, contact time, adsorbent mass, adsorbate concentration, and particle size on adsorption were also studied. The most effective pH range was found to be between 4.5 and 5 for the sorption of the metal ion. The...

2007-08-30 06:19:19

By Zhang, Q L Gao, Nai-Yun; Lin, Y C; Xu, Bin; Le, Lin-sheng ABSTRACT: Removal of arsenic(V) from aqueous solutions was evaluated with the following three different sorption materials: coal-based activated carbon 12 x 40 (activated carbon), iron(II) oxide (FeO)/activated carbon-H, and iron oxide. The apparent characteristics and physical chemistry performances of these adsorbents were investigated by X-ray diffraction, nitrogen adsorption, and scanning electronic microscope. Also, batch...

2007-04-15 03:00:25

By Capasso, S; Colella, C; Coppola, E; Iovino, P; Salvestrini, S ABSTRACT: The ability of the natural zeolited Neapolitan Yellow Tuff (NYT) enriched with calcium ions to remove humic acids from water was evaluated by batch adsorption equilibrium tests and dynamic experiments carried out by percolating humic acid solutions through a small NYT column (breakthrough curves). Under the experimental condition explored, the sorption capacity increases with the ionic strength and has the highest...


Word of the Day
attercop
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'
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