Interrelated effects of soils and compounds on persulfate oxidation of petroleum hydrocarbons in soils
Interrelated effects of soils and compounds on persulfate oxidation of petroleum hydrocarbons in soils
复制标题
土壤和化合物对土壤中石油烃过硫酸盐氧化的相互影响
DOI：
10.1016/j.jhazmat.2020.124845
复制
发表时间：
--
影响因子：
13.6
通讯作者：
Cai Xiyun
中科院分区：
文献类型：
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作者：
Wang Yaling;Huang Yi;Xi Puyu;Qiao Xianliang;Chen Jingwen;Cai Xiyun
土壤中石油烃(TPHs)的过硫酸盐化学氧化通常因土壤位置的不同而有很大的不同。土壤成分对TPHs过硫酸盐氧化的复杂影响仍然知之甚少，阻碍了对实际系统中过硫酸盐氧化的理解。在这里，我们为天然土壤成分和目标TPHs对TPHs过硫酸盐氧化的相互作用提供了经验证据。TPHs的输入导致了土壤有机质、矿物质和pH的显著变化，进而影响了土壤中TPHs的分布和有效性。这些土壤/TPH性质和氧化剂剂量构成了五个相互关联的术语，用于建立过硫酸盐氧化TPHs的预测模型。这些关系分别与过硫酸盐氧化的钛铁矿-碱耦合活化、过硫酸盐氧化的铁/锰矿物活化、土壤对化学氧化剂的需求、TPHs的传质-反应活性限制以及过硫酸盐氧化的适用参数有关。尽管污染场地和适用参数有很大差异，但基于相关性的TPHs过硫酸盐氧化模型对理想拟合值上下0.3倍的预测准确率高达43%。这一发现可能对过硫酸盐氧化的优化具有实际意义。
Persulfate-based chemical oxidation of petroleum hydrocarbons (TPHs) in soils usually varies drastically with soil sites. Complex effects of soil components on persulfate oxidation of TPHs remains poorly understood, impeding the understanding of persulfate oxidation in practical systems. Here we provided empirical evidence for the interrelated effects of natural soils components and target TPHs on persulfate oxidation of TPHs. Inputs of TPHs led to notable alterations of organic matter, minerals and pH of soils, which in turn influenced distributions and availability of TPHs in soils. These soil/TPH properties and oxidant dose constituted five interrelated terms that were used to develop a predictive model of persulfate oxidation of TPHs. Such interrelation accounted for ilmenite-base coupling activation of persulfate oxidation, Fe/Mn mineral activation of persulfate oxidation, chemical oxidant demand of soils, mass transfer-reactivity limiting of TPHs, and applicable parameters of persulfate oxidation, respectively. The interrelation-based model of persulfate oxidation of TPHs displayed high predictive accuracy of 43% for a factor of 0.3 above and below the ideal fit, despite large differences in contaminated sites and applicable parameters. This finding may have practical interests in the optimization of persulfate oxidation.