The analytical methodology of isomers quantification has been studied and published in former study (Wang et al., 2013). From Figure1 in Supporting Information, it seems that the isomers were not separated, but actually it does not affect the quantification of the isomers. Because the main quantitative ions were used for quantification and the main quantitative ion of each isomer were separated absolutely (Figure 1). Table 1 and Figure 1 were cited from Wang et al (2013). Moreover, series of research about the NP isomers were conducted and published afterwards. The following are the publications. Shiyu Wang, Fei Liu*, Wenyong Wu*, Yaqi Hu, Renkuan Liao, Gaoting Chen, Jiulong Wang, Jialin Li. Migration and health risks of nonylphenol and bisphenol A in soil-winter wheat systems with long-term reclaimed water irrigation. Ecotoxicology and Environmental Safety 158 (2018) 28–36. Shiyu Wang，Wenyong Wu*，Fei Liu, Xiaoou Li. Sorption and desorption behaviours of 4-nonylphenol on reclaimed water-irrigated soils. Environmental Engineering Science. (2019) 36 (9) : 1100-1111。 王世玉，刘菲*，刘玉龙，陈亮. 气相色谱-质谱法检测地下水中12种对壬基酚同分异构体.分析化学，2013，41（11）：1699-1703. 王世玉，刘菲*，吴文勇，尹世洋，刘玉龙，陈亮，张伟，陈会会.影响12种壬基酚同分异构体液液萃取效率的因素研究. 岩矿测试，2014，33（4）：570-577.
Therefore, though some of the organic carbon was adsorbed on the surface of the particle, the amounts of the microorganisms are enough for the degradation of NP.