Elimination of monocyclic aromatic hydrocarbons through a copper-modified bimodal mesoporous silica from aqueous media
محل انتشار: اولین کنفرانس ملی نانو از سنتز تا صنعت
سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 454
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شناسه ملی سند علمی:
NFSI01_157
تاریخ نمایه سازی: 17 آبان 1396
چکیده مقاله:
In recent decades, water pollution has become a serious environmental problem as a consequence of progressive industrialization and the development of civilization. Benzene, toluene and xylene (BTX) compounds are some of the most hazardous water contaminants, since they have toxic and carcinogenic properties. Even at very low concentrations, they may adversely affect the biological functions of terrestrial and aquatic ecosystems. For these reasons, strict limits have been imposed all over the world on their concentrations in water and wastewater, and the removal of BTX has become necessary before water is released into the environment [1-3]. The most common sources of BTX water contamination appear to be petroleum leakages from underground storage tanks, pipelines or tankers [4]. Many conventional methods can be employed to remove BTX from water and wastewater, including adsorption, aeration, biological oxidation and chemical oxidation. Of these, adsorption processes involving porous solids are the most popular, and are widely utilized in engineering practice since they permit the recovery of these compounds [5]. In this study, one type of copper-modified silica based mesoporous adsorbents (Cu-UVM-10) [6], has been synthesized and applied in the adsorptive removal of BTX compounds as representative monocyclic aromatic hydrocarbons over a batch setup. The structural order and textural properties of the synthesized catalysts have been characterized by XRD, N2 adsorption–desorption isotherms, HRTEM, FTIR and FESEM techniques. The influence of process parameters (i.e., pH, temperature and contact time) and their interactional effects on the adsorption of BTX compounds were analyzed using the obtained adsorption experimental data. The maximum adsorption yield is about 97%, which obtained at pH 6.5, 25 °C and 20 minutes.
کلیدواژه ها:
نویسندگان
Arvin Saffarian Delkhosh
Department of Chemistry, Science and Research branch, Islamic Azad University, Tehran, ۱۴۷۷۸۹۳۸۵۵, Iran
Sahar Baniyaghoob
Department of Chemistry, Science and Research branch, Islamic Azad University, Tehran,۱۴۷۷۸۹۳۸۵۵, Iran
Amir Vahid
Research Institute of Petroleum Industry, Tehran, ۱۴۸۵۷۳۳۱۱۱, Iran
Mohammad Saber Tehrani
Department of Chemistry, Science and Research branch, Islamic Azad University, Tehran,۱۴۷۷۸۹۳۸۵۵, Iran