AI Article Synopsis
- The study examined how different ozone dosages and pH levels influence the formation of nitrogenous and carbonaceous disinfection by-products along with the effects on algae in high-algae water.
- At an ozone concentration of 28.92 mg/L, the reduction of Microcystis aeruginosa reached 36%, with changes in various organic compounds observed—humic acid-like compounds initially increased before declining, while others like aromatic proteins dropped consistently.
- Lower ozone dosages were effective in controlling the formation of dichloroacetonitrile (DCAN) and trichloroacetonitrile (TCAN), but increased the production of trichloronitromethane (TCNM) and 1,1,
Article Abstract
Formation characteristics and transferring feature of nitrogenous/carbonaceous disinfection by-products have been observed under different ozone dosages and pH conditions, and essential nature conversion of Algae organic matters has been also studied concurrently, based on high algae-laden water. The results showed as follows:reduction of Microcystis aeruginosa could reach 36% at the ozonation concentration of 28.92 mg·L. Humic acid-like compounds first increased and then decreased with continuing addition of ozone dosage, whereas soluble microbial products, fulvic acids and aromatic protein substance all diminished. Low dosage of ozone had certain effect on control of dichloroacetonitrile(DCAN) and trichloroacetonitrile (TCAN) formation potential, yet augmented the yield of trichloronitromethane (TCNM) and 1,1,1-trichloroacetone(1,1,1-TCP) precursors, and N-DBPs formation potential was promoted with the increase of ozone dosage. Algae removal efficiency was relatively the best under the acidic condition, meanwhile, UV and DOC increased with the rise of pH, though the change was not outstanding. Humic acid-like compounds decreased with the rise of pH; ozonation could degrade the soluble microbial products and the consequence was affected little by the change of pH. DCAN and TCAN formation potential decreased with the rise of pH; TCNM formation potential appeared to be the highest when the pH was 10, whereas the highest 1,1,1-TCP formation potential was found at pH 7.
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| http://dx.doi.org/10.13227/j.hjkx.201608080 | DOI Listing |
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