Xu Zhuoqi, Guo Haiwei, Liu Tao, Zhang Wangqing, Ma Xiaodong
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
College of Chemistry, Nankai University, Tianjin 300071, China.
ACS Omega. 2019 Oct 29;4(20):18711-18717. doi: 10.1021/acsomega.9b02651. eCollection 2019 Nov 12.
Surfactant-enhanced soil washing is an effective remediation method for petroleum-hydrocarbons-contaminated soil. The residual petroleum hydrocarbons in the washing effluents reduce the elution ability of the washing effluents and cause secondary pollution to the environment. In this work, modified corncobs were prepared and used as selective adsorbents to remove the residual petroleum hydrocarbons in washing effluents. The structure of adsorbent was characterized and the adsorption conditions were optimized. With the adsorption by corncob-based adsorbents, washing effluents can be regenerated and recycled. After five cycles, the recovery efficiency of the washing effluents is still as high as 75.4%. The optimal adsorbent linear alkylbenzene sulfonates (LAS-Cb) also exhibited excellent recyclability, which can be recycled five times. The selective adsorption mechanism of the LAS-Cb for petroleum hydrocarbons in washing effluents, related to its huge hydrophobic core and surface electronegativity, is proposed.
表面活性剂强化土壤淋洗是一种用于修复石油烃污染土壤的有效方法。淋洗废水中残留的石油烃会降低淋洗废水的洗脱能力，并对环境造成二次污染。在本研究中，制备了改性玉米芯并将其用作选择性吸附剂，以去除淋洗废水中残留的石油烃。对吸附剂的结构进行了表征，并优化了吸附条件。通过基于玉米芯的吸附剂进行吸附后，淋洗废水可实现再生和循环利用。经过五个循环后，淋洗废水的回收效率仍高达75.4%。最佳吸附剂直链烷基苯磺酸盐（LAS-Cb）也表现出优异的可循环利用性，可循环使用五次。提出了LAS-Cb对淋洗废水中石油烃的选择性吸附机制，这与其巨大的疏水核心和表面电负性有关。
Zotero 插件
