黄磷炉渣制备SiO_2基复合吸附剂试验研究

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英文篇名：Experimental Study on Preparation of SiO_2 Based Composite Adsorbent from Yellow Phosphorus Slag 作者：王华丹 ; 贡纬华 ; 苏毅 ; 李国斌 英文作者：Wang Huadan;Gong Weihua;Su Yi;Li Guobin;College of Chemical Engineering, Kunming University of Science and Technology; 关键词：吸附剂 ; 六价铬 ; 氨基改性 ; 黄磷炉渣 英文关键词：adsorbent;;hexavalent chromium;;amino modification;;yellow phosphorus slag 中文刊名：FJSK 英文刊名：Non-Metallic Mines 机构：昆明理工大学化学工程学院; 出版日期：2019-05-20 出版单位：非金属矿 年：2019 期：v.42;No.254 基金：国家自然科学基金(21666015) 语种：中文; 页：FJSK201903007 页数：4 CN：03 ISSN：32-1144/TD 分类号：30-33

摘要

以固体废弃物黄磷炉渣为原料,经酸浸得到高比表面积二氧化硅载体,在不同溶剂(异丙醇、乙醇、甲醇、醇/水和纯水)中通过氨基硅烷改性制得SiO_2基复合吸附剂(SiO_2+NH_2)。并以Cr(VI)去除率为性能评价指标,优化了氨基硅烷的复合条件。采用扫描电子显微镜、激光衍射、比表面积测定、红外测定和元素分析对吸附剂的形貌结构、粒径分布及氨基硅烷在载体上固定化程度进行表征。结果表明,复合过程中反应溶剂的选择和温度的控制是影响Cr(VI)去除效果的重要因素,最佳工艺条件为:复合过程溶剂为纯水、氨基硅烷投入量3 mL、复合时间1 h、复合温度70℃,在100 mL、50 mg/L模拟废水中对Cr(VI)的去除率达到97.31%,对应吸附容量为32.44 mg/g。
        The solid waste yellow phosphorus furnace slag is used as raw material, and the high specific surface area silica carrier is obtained by acid leaching. The SiO_2 group is prepared by aminosilane modification in different solvents(isopropyl alcohol, ethanol, methanol, water/alcohol and pure water). Composite adsorbent(SiO_2+NH_2). The Cr(VI) removal rate was used as the performance evaluation index, and the composite conditions of aminosilane were optimized. Scanning electron microscopy, laser diffraction, specific surface area measurement, infrared measurement and elemental analysis were used to characterize the morphology and pore size distribution of the adsorbent and the degree of immobilization of the aminosilane on the support. The experimental results show that the selection of reaction solvent and temperature control in the compounding process are important factors affecting the removal efficiency of Cr(VI). The optimum process conditions are as follows: the solvent in the compounding process is pure water, the input amount of aminosilane is 3 mL, compound The time was 1 h and the composite temperature was 70 ℃. The removal rate of Cr(VI) in the simulated wastewater of 100 mL and 50 mg/L reached 97.31%, and the corresponding adsorption capacity was 32.44 mg/g.

引文

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