水成分之间的结合(溶解的有机物,阴离子和阳离子)和药物会影响污染物的迁移和转化。在这里,水基质对药物降解的影响,以及紫外线期间的电能需求,UV/催化剂,UV/O3,UV/H2O2基,对UV/过硫酸盐和UV/氯工艺进行了系统评价。水成分的增强作用是由于强大的反应性物种的形成,催化剂的电子和空穴的复合还原和催化剂的再生;光衰减导致的抑制,目标污染物和活性物质激发态的猝灭效应,稳定的络合生成和催化剂失活。同一污染物在各种AOPs中的转化途径具有很高的相似性。同时,每种氧化剂还可以充当特殊的亲核试剂或亲电试剂,取决于目标化合物的官能团。药物降解的每阶电能(EEO)可以遵循EEOUV>EEOUV/催化剂>EEOUV/H2O2>EEOUV/PS>EEOUV/氯或EEOUV/O3的顺序。同时,平衡成本效益评估和有毒副产品形成至关重要,在存在不同水基质的情况下,污染物降解途径和产量的比较仍然缺乏。
The binding between water components (dissolved organic matters, anions and cations) and pharmaceuticals influences the migration and transformation of pollutants. Herein, the impact of water matrices on drug degradation, as well as the electrical energy demands during UV, UV/catalysts, UV/O3, UV/H2O2-based, UV/persulfate and UV/chlorine processes were systemically evaluated. The enhancement effects of water constituents are due to the powerful reactive species formation, the recombination reduction of electrons and holes of catalyst and the catalyst regeneration; the inhibition results from the light attenuation, quenching effects of the excited states of target pollutants and reactive species, the stable complexations generation and the catalyst deactivation. The transformation pathways of the same pollutant in various AOPs have high similarities. At the same time, each oxidant also can act as a special nucleophile or electrophile, depending on the functional groups of the target compound. The electrical energy per order (EEO) of drugs degradation may follow the order of EEOUV > EEOUV/catalyst > EEOUV/H2O2 > EEOUV/PS > EEOUV/chlorine or EEOUV/O3. Meanwhile, it is crucial to balance the cost-benefit assessment and toxic by-products formation, and the comparison of the contaminant degradation pathways and productions in the presence of different water matrices is still lacking.