Nonylphenols (NPs), one of the known endocrine disrupting organic pollutants, had received full attention for their estrogenic potency and ubiquitous distribution in the environment. Due to its chemical properties and compositions of technical nonylphenols (tNPs), which was persistent and soil environments for a long time and affect the ecosystem vigorously, degradation behaviour of a nonylphenol isomer (NP₃₈) and the para-substituded nonylphenols (4-NPs) in water and soil was compared in this study. The results showed that the 4-NPs and NP₃₈ could be degraded under the mercury lamp in ultrapure water, 90% of 4-NPs and NP₃₈ were photodegradated in 2 h, but the removal rate of the 4-NPs was slightly faster than the NP₃₈. The NP₃₈ was almost completely decay under the UV in 120 min. The active species (NO₃⁻ and Fe³⁺) were benefit for the photogradation of NP₃₈ and presented higher efficiency under the higher concentration. The biodegradable curves of the 4-NPs and NP₃₈ in the SS (The soil from sewage irrigation area) were similar, 84% of the NP₃₈ was removed after 20 days later in SS, the 62.25% of the NP₃₈ was remained after 60 days later in CS (the soil was from the groundwater irrigation area), but the removal rate of the NP₃₈ was nearly two times to the 4-NPs in the CS, and the structure of the nonylphenol isomers with α-quaternary had influenced on its degradation in soils. The study was helpful for better understanding the migration and transformation behaviour of NPs and provided scientific basis for accurate assessment of environmental risk of NPs from the sewage irrigation area.

中文翻译：

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我国典型污水灌区水体和土壤中壬基酚异构体的降解

壬基酚（NPs）是已知的内分泌干扰有机污染物之一，因其雌激素功效和在环境中普遍分布而受到充分关注。由于技术壬基酚 (tNPs) 的化学性质和成分长期存在于土壤环境中并对生态系统产生强烈影响，壬基酚异构体 (NP ₃₈ ) 和对位取代的壬基酚 (4-NPs)的降解行为）在本研究中比较了水和土壤中的情况。结果表明，4-NPs和NP ₃₈在超纯水中汞灯下可被降解，2 h内90%的4-NPs和NP ₃₈被光降解，但4-NPs的去除率略快于4-NPs。 NP ₃₈。NP ₃₈在紫外线照射下 120 分钟内几乎完全腐烂。活性物质（NO ₃ ^-和Fe ³⁺）有利于NP ₃₈的光分级，并且在较高浓度下表现出较高的效率。4-NPs和NP ₃₈在SS（污水灌区土壤）中的可生物降解曲线相似，SS中20天后84%的NP ₃₈被去除，62.25%的NP ₃₈在SS中残留。 60天后在CS中（土壤来自地下水灌溉区），但NP ₃₈的去除率几乎是CS中4-NPs的两倍，且α-季铵基壬基酚异构体的结构受到影响关于其在土壤中的降解。该研究有助于更好地了解NPs的迁移转化行为，为准确评估污水灌区NPs的环境风险提供科学依据。