Cai Guang-Qiang, Fu Xue-Min, Liu Li-Jun, Lu Xiao-Yan, Zhang Jin-Song, Liu Jia-Qi, Qu Ying
Shenzhen Water Affairs (Group) Co., Ltd., Shenzhen 518031, China.
Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China.
Huan Jing Ke Xue. 2016 Jul 8;37(7):2586-2590. doi: 10.13227/j.hjkx.2016.07.022.
The influences of different chemical pre-oxidants, including sodium hypochlorite (NaClO), chlorine dioxide (ClO), permanganate (KMnO), hydrogen peroxide (HO), ozone (O) and ozone/hydrogen peroxide (O/HO), on chloral hydrate (CH) formation were studied for threonine that has the highest special chloral hydrate formation potential (SCHFP). Suitable pre-oxidants and corresponding optimal doses were determined to provide guidance for controlling chloral hydrate (CH) formation during drinking water treatment. The results indicated that the pre-oxidants that could decrease CH formation for one day incubation time (CH) were HO, ClO, KMnO and NaClO, and the corresponding suitable doses were 3, 0.5, 0.6 and 0.5 mg·L, and the corresponding CH removal rates were 61.54%, 47.63%, 29.77% and 10.94%, respectively. The pre-oxidants that could decrease CH formation potential (CHFP) were KMnO, NaClO, HO and ClO, and the corresponding suitable doses were 0.6 mg·L, 0.5 mg·L, 3 mg·L and 0.5 mg·L, and the corresponding CHFP removal rates were 41.01%, 33.38%, 8.36% and 2.40%, respectively. In addition, O and O/HO were not suitable for controlling CH in the conventional treatment process because they could increase CH and CHFP.
针对具有最高特殊水合氯醛生成潜力（SCHFP）的苏氨酸，研究了不同化学预氧化剂，包括次氯酸钠（NaClO）、二氧化氯（ClO₂）、高锰酸钾（KMnO₄）、过氧化氢（H₂O₂）、臭氧（O₃）和臭氧/过氧化氢（O₃/H₂O₂）对水合氯醛（CH）形成的影响。确定了合适的预氧化剂及其相应的最佳剂量，为饮用水处理过程中控制水合氯醛（CH）的形成提供指导。结果表明，对于一天的孵育时间能降低水合氯醛（CH）形成量的预氧化剂为H₂O₂、ClO₂、KMnO₄和NaClO，相应的合适剂量分别为3、0.5、0.6和0.5mg·L⁻¹，相应的水合氯醛去除率分别为61.54%、47.63%、29.77%和10.94%。能降低水合氯醛生成潜力（CHFP）的预氧化剂为KMnO₄、NaClO、H₂O₂和ClO₂，相应的合适剂量分别为0.6mg·L⁻¹、0.5mg·L⁻¹、3mg·L⁻¹和0.5mg·L⁻¹，相应的水合氯醛生成潜力去除率分别为41.01%、33.38%、8.36%和2.40%。此外，O₃和O₃/H₂O₂不适合在常规处理过程中控制水合氯醛，因为它们会增加水合氯醛及其生成潜力。
