当前位置：
X-MOL 学术
›
Environ. Sci. Technol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Separate Reclamation of Oil and Surfactant from Oil-in-Water Emulsion with a CO2-Responsive Material
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-06-20 , DOI: 10.1021/acs.est.1c08149 Ya Liu 1 , Yunfeng Zhao 2 , Ning Jiang 1 , Wei Cheng 1 , Dongwei Lu 3 , Tao Zhang 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-06-20 , DOI: 10.1021/acs.est.1c08149 Ya Liu 1 , Yunfeng Zhao 2 , Ning Jiang 1 , Wei Cheng 1 , Dongwei Lu 3 , Tao Zhang 1
Affiliation
|
Oil-in-water (O/W) emulsion is one type of oily wastewater produced by many industries. The treatment of and resource recovery from O/W emulsions are very challenging. Unlike bulk or floating oil, which can be successfully abstracted from wastewater by hydrophobic/oleophilic materials, the abstraction of emulsified oil is not easy because of its highly hydrophilic surface composed of dense surfactants. Separate reclamation of miscible oil and surfactant through a green approach is even more difficult. Here, we report that a CO2-responsive material can abstract emulsified oil and demulsify the oil droplets. Moreover, it can release the abstracted oil and surfactant separately. This material exhibited a very high adsorption capacity for emulsified oil (14 g g–1). Upon switching the surface wettability of the material under CO2 or synthetic flue gas sparging, coalesced oil was reclaimed while the surfactant was retained inside the pores. The hydrophobic character of the material was retrieved when CO2 was purged with nitrogen sparging or air heating. Then, the surfactant was reclaimed by elution with diluted alkali/ethanol. Oil and surfactant were thus separately reclaimed from the O/W emulsion. High rates of oil removal, oil recovery, and surfactant recovery were maintained during repeated adsorption/desorption operations. This work provides a potentially sustainable and green way for O/W emulsion treatment and resource recovery.
中文翻译：
使用 CO2 响应材料从水包油乳液中分离回收油和表面活性剂
水包油 (O/W) 乳液是许多行业产生的一种含油废水。O/W 乳液的处理和资源回收非常具有挑战性。与可以通过疏水/亲油材料成功地从废水中提取的散装油或浮油不同，乳化油的提取并不容易，因为它的高亲水性表面由致密的表面活性剂组成。通过绿色方法分离回收混溶油和表面活性剂更加困难。在这里，我们报告了一种 CO 2响应材料可以提取乳化油并破乳油滴。此外，它可以分别释放提取的油和表面活性剂。这种材料对乳化油（14 gg –1）。在 CO 2或合成烟气喷射下切换材料的表面润湿性后，聚结油被回收，而表面活性剂则保留在孔内。当用氮气喷射或空气加热吹扫CO 2时，材料的疏水特性得以恢复。然后，通过用稀碱/乙醇洗脱来回收表面活性剂。因此，油和表面活性剂分别从 O/W 乳液中回收。在重复的吸附/解吸操作过程中，保持了较高的油去除率、油回收率和表面活性剂回收率。这项工作为 O/W 乳液处理和资源回收提供了一种潜在的可持续和绿色途径。
更新日期：2022-06-20
中文翻译：
使用 CO2 响应材料从水包油乳液中分离回收油和表面活性剂
水包油 (O/W) 乳液是许多行业产生的一种含油废水。O/W 乳液的处理和资源回收非常具有挑战性。与可以通过疏水/亲油材料成功地从废水中提取的散装油或浮油不同，乳化油的提取并不容易，因为它的高亲水性表面由致密的表面活性剂组成。通过绿色方法分离回收混溶油和表面活性剂更加困难。在这里，我们报告了一种 CO 2响应材料可以提取乳化油并破乳油滴。此外，它可以分别释放提取的油和表面活性剂。这种材料对乳化油（14 gg –1）。在 CO 2或合成烟气喷射下切换材料的表面润湿性后，聚结油被回收，而表面活性剂则保留在孔内。当用氮气喷射或空气加热吹扫CO 2时，材料的疏水特性得以恢复。然后，通过用稀碱/乙醇洗脱来回收表面活性剂。因此，油和表面活性剂分别从 O/W 乳液中回收。在重复的吸附/解吸操作过程中，保持了较高的油去除率、油回收率和表面活性剂回收率。这项工作为 O/W 乳液处理和资源回收提供了一种潜在的可持续和绿色途径。
京公网安备 11010802027423号