磷矿石合成纳米颗粒吸附去除合成液和炼油废水中的酚类化合物

Q4 Materials Science
R. Benaddi, K. E. Harfi, F. Aziz, F. Berrekhis, N. Ouazzani
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引用次数: 6

摘要

本工作采用吸附法对苯酚溶液和炼油厂废水中的酚类化合物进行了去除研究。使用的吸附剂是来自Khouribga磷矿(摩洛哥)的天然磷矿和由这种磷酸盐通过溶解-沉淀反应合成的磷灰石。结果表明,天然磷酸盐和合成磷灰石的结构分别为Ca9.55(PO4)4.96F1.96(CO3)1.283和(Ca10(OH)2(PO4。合成的磷灰石比天然磷酸盐具有更高的比表面积(193.62m2/g)。吸附研究表明,合成的磷灰石可以作为吸附剂去除水中的苯酚,反应动力学非常快(约10分钟),吸附量等于15mg/g。在较低的温度和中性pH下发现了最佳吸附容量。苯酚溶液在两种吸附剂上的吸附动力学可以用一个对应于伪二阶的方程来描述。Freundlich模型比Langmuir模型更符合吸附等温线。对橄榄厂废水的表征表明,苯酚指数为0.39g/l,化学需氧量COD为158g/l。两种吸附剂对OMWW的吸附处理表明,使用天然磷酸盐作为吸附剂,苯酚指数和COD降低了23%,而使用合成磷灰石,苯酚指数降低了30%,COD降低了38%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Removal of Phenolic Compounds from Synthetic Solution and Oil Mill Waste Water by Adsorption onto Nanoparticles Synthesized from Phosphate Rock
In this work, we studied the elimination of phenol compounds from phenolic solutions and Oil Mill Waste Water (OMWW) by adsorption method. The adsorbents used are natural phosphate rock coming from Khouribga phosphate mine (Morocco) and an Apatite synthesized from this phosphate by a dissolution–precipitation reactions. Results obtained showed that the structure of natural phosphate and synthesized apatite are respectively Ca9.55(PO4)4.96F1.96 (CO3)1.283 and (Ca10(OH)2(PO4)6). Synthesized apatite has a higher specific surface than natural phosphate (193.62m2/g). The adsorption study showed that the synthesized apatite can be used as an adsorbent to remove phenol from water with very fast reaction kinetics (about 10 min) and an adsorption capacity equal to 15mg/g. The optimal adsorption capacity was found in low values of temperature and in neutral pH. Adsorption kinetics of phenol solution on the two adsorbents can be described by an equation corresponding to a pseudo second order. Freundlich model fitted well with the adsorption isotherms more than the Langmuir model. Characterization of olive mill wastewater shows that, phenol index equal to 0.39 g/l and chemical oxygen demand COD equal to 158 g/l. The treatment of OMWW by adsorption method on the two adsorbents shows that the use of natural phosphate as adsorbent reduced phenol index by 23% and (COD) by 35% while using synthesized apatite reduced phenol index by 30% and COD by 38%.
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期刊介绍: The Indian Society for Surface Science and Technology is an organization for the cultivation, interaction and dissemination of knowledge in the field of surface science and technology. It also strives to promote Industry-Academia interaction
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