一种从废水中去除酚的新方法：纳米颗粒辅助纳米过滤（NANF）。
A novel technique for detoxification of phenol from wastewater: Nanoparticle Assisted Nano Filtration (NANF).
机构信息
Department of Chemical Engineering, National Institute of Technology, Tiruchirapalli, 15 India.
Center for Environmental Engineering, PRIST University, Thanjavur, India.
出版信息
J Environ Health Sci Eng. 2016 May 24;14:9. doi: 10.1186/s40201-016-0249-8. eCollection 2016.
BACKGROUND
Phenol is one of the most versatile and important organic compound. It is also a growing concern as water pollutants due to its high persistence and toxicity. Removal of Phenol from wastewaters was investigated using a novel nanoparticle adsorption and nanofiltration technique named as Nanoparticle Assisted Nano Filtration (NANF).
METHODS
The nanoparticle used for NANF study were silver nanoparticles and synthesized to three distinct average particle sizes of 10 nm, 40 nm and 70 nm. The effect of nanoparticle size, their concentrations and their tri and diparticle combinations upon phenol removal were studied.
RESULTS
Total surface areas (TSA) for various particle size and concentrations have been calculated and the highest was 4710 × 10(12 )nm(2 )for 10 nm particles and 180 ppm concentration while the lowest was for 2461 × 10(11) for 70 nm and 60 ppm concentrations. Tri and diparticle studies showed more phenol removal % than that of their individual particles, particularly for using small particles on large membrane pore size and large particles at low concentrations. These results have also been confirmed with COD and toxicity removal studies.
CONCLUSIONS
The combination of nanoparticles adsorption and nanofiltration results in high phenol removal and mineralization, leading to the conclusion that NANF has very high potential for treating toxic chemical wastewaters.
背景
苯酚是用途最广泛和最重要的有机化合物之一。由于其高持久性和毒性，它也成为了越来越受关注的水污染物质。本研究采用一种新型的纳米颗粒吸附和纳滤技术，即纳米颗粒辅助纳滤（NANF），来去除废水中的苯酚。
方法
用于 NANF 研究的纳米颗粒为银纳米颗粒，并合成了三种不同平均粒径的纳米颗粒，分别为 10nm、40nm 和 70nm。研究了纳米颗粒粒径、浓度及其三聚体和二聚体组合对苯酚去除的影响。
结果
计算了不同粒径和浓度的总表面积（TSA），最高值为 10nm 颗粒浓度为 180ppm 时的 4710×10(12)nm(2)，最低值为 70nm 颗粒浓度为 60ppm 时的 2461×10(11)。三聚体和二聚体研究表明，与单个颗粒相比，三聚体和二聚体的苯酚去除率更高，特别是在大膜孔尺寸上使用小颗粒和低浓度下使用大颗粒时。这些结果也得到了 COD 和毒性去除研究的证实。
结论
纳米颗粒吸附和纳滤的结合实现了高苯酚去除和矿化，这表明 NANF 具有处理有毒化学废水的巨大潜力。
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