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Research on the trichloroisocyanuric acid (TCCA) and ciprofloxacin (CPFX) of chlorella

Three FAU-structure type zeolites (EMC-1, USY and USY without EFAl) with different Si/Al molar ratio and their pure hexagonal analogue, the EMC-2 zeolite (EMT-structure type) were prepared and thoroughly characterized. Their catalytic properties were examined in the non-conventional gas–solid reaction requiring a strong acidity. A deeper focus was paid to the difference in activity/selectivity of these zeolites toward the continuous chlorination of aromatics (nitrobenzene and toluene) using trichloroisocyanuric acid (TCCA) as chlorination agent.
The trichloroisocyanuric acid (TCCA) is a cheap solid found in commercial products for swimming-pool desinfection. The tribromoisocyanuric acid (TBCA) is easily prepared from cyanuric acid in a green and very convenient route by the reaction of cyanuric acid with KBr/oxone®. These acids are useful reagents from the green chemistry point of view, as they are safe, stable and have an excellent atom economy (46% for TCCA and 66% for TBCA). Besides, the residue formed in their reactions (cyanuric acid) can be recycled to reform the original trihaloisocyanuric acid.
Research on the trichloroisocyanuric acid (TCCA) and ciprofloxacin (CPFX) of chlorella, rare minnow and Daphnia magna acute toxicity. Toxicity test results show that, TCCA and CPFX Chlorella 96hEC50 were 0.31mg · L-1 and 20.61mg · L-1, Daphnia magna 48hLC50 were 0.19mg · L-1 and 135.15mg · L-1, TCCA for rare minnow 96hLC50 1.76 as mg · L-1, CPFX of rare minnow has no acute toxicity. For TCCA, the most sensitive is Daphnia magna, chlorella following. For CPFX, the most sensitive is chlorella, Daphnia magna, following, rare minnow least sensitive.