` Figure 1. (a) Parabolic concentrator system for glass tubes containing catalyst and contaminated water [6]; (b) photocatalytic decontamination of phenol-contaminated water using different film thickneses [6]; (c) disinfection efficiencies after hundreds of hours of operation [7]; (d) water disinfection in an autonomous recirculating compound parabolic collector system with supported cellulose/TiO₂ and ruthenium-based catalysts, evaluated in Cusco [8]; (e) photocatalytic disinfection of E. coli as a function of catalyst reuse cycles and indicated treatment times [8]; (f) compound parabolic collector system enabling bacteria decontamination from water [9,10]; (g) E. coli concentration as function of time during photocatalytic experiments using the CPC reactor under the shown condition [9]; (h) capacitive deionization (CDI) prototype and electrode for water desalination [11,12]; (l) dynamic response of the CDI system [11]. (c) (d ) (e) (f) (g) (h) (i) (a)
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