工业化发展导致废水中含有大量重金属离子,去除重金属离子成为水质净化的研究热点。以活性炭(AC)为主体吸附剂,进行三氯化铁改性,制备出三氯化铁改性活性炭吸附剂(Fe3+-AC),通过X射线衍射(XRD)、红外光谱(FT-IR)和扫描电镜(SEM)对其结构进行表征。结果表明:三氯化铁已成功改性活性炭,改性后吸附剂Fe3+-AC孔径较AC有所增大,更有利于离子吸附。进一步探究Fe3+-AC对Cr(Ⅵ)的吸附能力,吸附时间为300min,吸附剂投加量为0.2g,pH为6时,吸附效果最好,在此条件下,Fe3+-AC对Cr(Ⅵ)的去除率接近90%,为后续循环吸附研究奠定基础。
Industrial development has led to a large number of heavy metal ions in wastewater,and the removal of heavy metal ions has become a research focus of water purification.In this paper,activated carbon (AC) was used as the main adsorbent,and modified by ferric chloride to prepare ferric chloride modified activated carbon adsorbent (Fe3+-AC).Its structure was characterized by XRD,FT-IR and SEM.The results showed that the activated carbon had been successfully modified by ferric chloride,and the pore diameter of the modified adsorbent Fe3+-AC was larger than that of AC,which was more conducive to ion adsorption.The experiment further explored the adsorption capacity of Fe3+-AC for Cr(Ⅵ).The results showed that the adsorption effect was best when the adsorption time was 300 min,the dosage of adsorbent was 0.2g,and the pH was 6.Under this condition,the removal rate of Cr(Ⅵ) by Fe3+-AC was close to 90%,laying a foundation for subsequent cyclic adsorption research.
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基金资助
国家自然科学基金面上项目(51778397)
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