281 Figure 2. Photocatalytic water decontamination system using different non-recirculating configurations: (a) PET bottle containing contaminated water with composite pellets [13]; (b) a cross section of an activated carbon (AC) and TiO₂ pellet; (c) efficiency for photocatalytic decontamination of phenolcontaminated water using solar energy [13]; (d) public demonstration of household-scale setup for arsenic removal from water; (e) before treatment; (e) after treatment, showing the precipitate containing the contaminant separated from the water [16,17]; (f) design of a portable system for emergency zones, designed for bacterial disinfection[14]; (g) picture of a 20 l prototype; (h) The system achieved disinfection efficiencies of four orders of magnitude under laboratory conditions (i) [15] and (j) with real water in the field [14]. Pilot-scale for arsenic removal using different concurrent technologies were implemented in the Locumba District, funded by Fincyt in 2010 (now Proinnovate) (Figure 3), using a patented technology [18,19] results are presented in (c), shown that from water having 0.5 ppm of arsenic, after the electrochemical treatment [19], the concentration of arsenic decreases to 0.05 ppm of arsenic, and using filtration [19], it could be below 0.2 ppm of arsenic.
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