RSM法优化氧化锆纳米颗粒对水中除氟的影响

IF 0.4 Q4 ENVIRONMENTAL SCIENCES

Asian Journal of Water, Environment and Pollution Pub Date : 2022-11-14 DOI:10.3233/ajw220091

Poornima G. Hiremath, G. Prashanth, Abdul Bais Kadli, Sheril Varghese, Vishnu V. Bhaskar

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引用次数: 0

摘要

本文研究了氧化锆纳米颗粒对水中氟化物的吸附。采用基于中心复合设计(CCD)的响应面法(RSM)研究了初始氟浓度、吸附剂用量、pH、接触时间等因素对氟离子吸附的影响及其相互作用。在pH为7、初始氟浓度为10 ppm、吸附剂用量为12.5 g/L、接触时间为105 min的条件下，氟的去除率最高可达95%左右。为了解氟在纳米颗粒上的吸附机理，研究了吸附等温线和吸附动力学。Langmuir等温吸附模型和拟二级动力学模型对氧化锆纳米颗粒除氟具有较好的拟合性。采用x射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和扫描电镜(SEM)对纳米颗粒吸附前后进行了表征。

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Optimisation of Defluoridation of Water by Zirconia Nanoparticles Using RSM

In the present work, zirconia nanoparticles were investigated for the adsorption of fluoride from water. The effect of the factor variables viz., the effect of initial fluoride concentration, adsorbent dosage, pH, and contact time and their interactions on adsorption of fluoride ion were investigated by response surface methodology (RSM) based on central composite design (CCD). The maximum fluoride removal was around 95% at 7 pH, initial fluoride concentration of 10 ppm, adsorbent dosage of 12.5 g/L, and contact time at 105 min. To understand the adsorption mechanism of fluoride on to the nanoparticles, adsorption isotherms and adsorption kinetics were studied. The Langmuir isotherm adsorption model and pseudo-second-order kinetics model fitted well for the fluoride removal using zirconia nanoparticles. The nanoparticles were characterised before and after for their adsorption using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and SEM analysis.

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.