Sunlight photodegradation of 2,4,5-trichlorophenoxy-acetic acid and 2,4,5,trichlorophenol on TiO2. Identification of intermediates and degradation pathway

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

“…With sufficient investment other Me/MeO ENM compounds may reach similar prices, although this estimate may not hold true for more exotic formulations (e.g., [43]) as titanium is the 9th most abundant element in the Earth's crust [485] and is cheaply available. Since photocatalysts are not degraded in the production of oxidizing radicals, the possibility of regeneration and reuse exists and has indeed been proven for these materials [282,404,486,487], which has the potential to further decrease the overall costs associated with using photocatalytic Me/MeO ENMs in water treatment.…”

Photocatalytic degradation of organic water contaminants: Mechanisms involving hydroxyl radical attack

“…Intermediates detected during the photocatalytic degradation of aromatic compounds are~typically hydroxylated structures (8,(36)(37)(38)(39)(40). These intermediates are consistent with those found when similar aromatics are reacted with a known source of hydroxyl radicals (28,(41)(42)(43), further suggesting that OH.…”

Design and Cost of Solar Photocatalytic Systems for Groundwater Remediation

“…The feasibility of using sunlight in conjunction with a photocatalyst to destroy organic water pollutants was demonstrated by researchers in the mid-1980s [1,2,3]. By directing the ultraviolet (UV) portion of sunlight onto a catalyst immersed in contaminated water, solar detoxification systems break down toxic organic chemicals into nontoxic compounds.…”