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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Textural and adsorption characteristics of carbon xerogel adsorbents for removal of Cu (II) ions from aqueous solution
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Textural and adsorption characteristics of carbon xerogel adsorbents for removal of Cu (II) ions from aqueous solution

机译：碳干凝胶吸附剂从水溶液中去除Cu（II）离子的质构和吸附特性

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摘要

Resorcinol-formaldehyde (RF) carbon xerogels were synthesized using different resorcinol/sodium carbonate catalyst molar ratios (R/C = 50, 200, 500 and 1000) and heat treatment temperatures (HTT = 500, 600 and 700) under no external gas flow. The carbon adsorbents were extensively characterized by CHO content, FTIR, TEM and nitrogen adsorption isotherm at 77 K. The effect of R/C, HTT and oxygen content on the development of porosity within carbons was studied. Also, the adsorption capacity of these adsorbents was investigated by the removal of copper (II) ions from aqueous solution using single bottle test. The produced carbon xerogels exhibit a micro-mesopore character, but with different extents depending on the mechanism of porosity generation in relation to R/C, HTT and oxygen functional groups. Results show that the optimum conditions to obtain porous carbon xerogels were the highest R/C = 500-1000 in combination with carbonization preferably at 600 or 700 °C. Single bottle removal of Cu (II) ions indicated the developed carbons with appreciable capacity (q _u = 32-130 mg/g) which are controlled by the surface area and surface chemical nature (acidic O-functional groups). Finally, the present investigation provides a new, nanoporous type of porous carbon adsorbents with high adsorption capacity for removal of heavy metals from wastewater media.
机译：在没有外部气流的情况下，使用不同的间苯二酚/碳酸钠催化剂摩尔比（R / C = 50、200、500和1000）和热处理温度（HTT = 500、600和700）合成间苯二酚-甲醛（RF）碳干凝胶。通过77 K下的CHO含量，FTIR，TEM和氮吸附等温线对碳吸附剂进行了广泛表征。研究了R / C，HTT和氧含量对碳内孔隙率发展的影响。同样，通过使用单瓶测试从水溶液中去除铜（II）离子来研究这些吸附剂的吸附能力。产生的碳干凝胶表现出微介孔特性，但取决于与R / C，HTT和氧官能团相关的孔隙生成机理，其程度不同。结果表明，获得多孔碳干凝胶的最佳条件是最高R / C = 500-1000，最好在600或700°C下碳化。单瓶去除Cu（II）离子表明已形成的碳具有明显的容量（q_u = 32-130 mg / g），这些碳由表面积和表面化学性质（酸性O-官能团）控制。最后，本研究提供了一种新型的，具有高吸附能力的纳米多孔类型的多孔碳吸附剂，用于从废水介质中去除重金属。

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