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Fe-Al based nanocomposite reinforced hydrothermal carbon: Efficient and robust absorbent for anionic dyes.
Chemosphere ( IF 8.1 ) Pub Date : 2020-06-22 , DOI: 10.1016/j.chemosphere.2020.127421
Vibha T Sharma 1 , Manohara Halanur M 1 , Smitha V Kamath 1 , Dibyendu Mondal 1 , Nataraj Sanna Kotrappanavar 2
Affiliation  

Nanocomposites with ultrahigh adsorption capabilities are highly desired for efficient wastewater remediation. Unfortunately, most of the nanomaterial based adsorbents showing inevitable limitation such as leaching and agglomeration led to the emerging field of carbonaceous hybrid materials with nanocomposites. Herein, we demonstrated a simple and low-temperature hydrothermal assisted preparation of Fe–Al based nanocomposites immobilized using carbon spheres. Towards this, we have approached two different routes one is hybridizing with nanocomposite and another is doping on the surface of the carbon spheres. Iron doping played a dual-faceted role of active site for robust adsorption as well as induce magnetic property to the composites. The micro-cleaners have been extensively characterized for their physicochemical properties and adsorption capacities using FTIR, Raman, XRD, BET isotherms and XPS techniques. Remarkably, microcleaners shows robust adsorption where >99% removal was obtained within 10 min for 50 mg L−1 concentrated Eriochrome Black T (EBT) dye using 0.01 g of materials. Further, adsorption data followed the pseudo second order kinetics while the equilibrium data fitted perfectly into the Langmuir adsorption equation. As synthesized user friendly microcleaner (HTC-2) exhibits maximum adsorption capacity (qmax) of 564.97 mg g−1 for EBT dye at pH 4. Hence, the preliminary results highlight the potential of the composites to be used in pretreatment steps of industry effluents.



中文翻译:

Fe-Al基纳米复合增强水热碳:高效且坚固的阴离子染料吸收剂。

对于高效的废水修复,非常需要具有超高吸附能力的纳米复合材料。不幸的是,大多数基于纳米材料的吸附剂显示出不可避免的局限性,例如浸出和团聚,导致了含碳纳米复合材料与纳米复合材料的出现。在这里,我们展示了一种简单而低温的水热辅助制备方法,用碳球固定化了Fe-Al基纳米复合材料。为此,我们采用了两种不同的途径,一种是与纳米复合材料杂交,另一种是在碳球表面掺杂。铁掺杂在活性位点的双重作用中起到了强大的吸附作用,并诱导了复合材料的磁性。使用FTIR,拉曼,XRD,BET等温线和XPS技术对微清洁器的理化性质和吸附能力进行了广泛表征。值得注意的是,微型清洁剂显示出强大的吸附能力,其中50 mg L在10分钟内去除率> 99%-1使用0.01 g的材料浓缩的Eriochrome Black T(EBT)染料。此外,吸附数据遵循伪二级动力学,而平衡数据则完全符合Langmuir吸附方程。由于合成的用户友好型微清洁剂(HTC-2)在pH 4下对EBT染料的最大吸附容量(q max)为564.97 mg g -1。因此,初步结果突显了该复合材料在工业预处理步骤中的潜力。废水。

更新日期:2020-06-27
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