代莹,张鑫,陈茜,付影,邵纯红,邹金龙,邢子鹏.表面活性剂对以污泥为铝源制得的纳米Al（OH）3性质的影响研究[J].环境科学学报,2014,34(9):2265-2270
表面活性剂对以污泥为铝源制得的纳米Al（OH）3性质的影响研究
- Effect of surfactant on characteristics of nano-Al(OH)3 obtained from sludge
- 基金项目：黑龙江省教育厅科学技术研究项目面上项目（No.12521450）
- 代莹
- 1. 黑龙江工程学院土木工程系, 哈尔滨 150050;2. 黑龙江大学功能无机材料化学教育部重点实验室, 哈尔滨 150080
- 张鑫
- 1. 黑龙江工程学院土木工程系, 哈尔滨 150050
- 陈茜
- 1. 黑龙江工程学院土木工程系, 哈尔滨 150050
- 付影
- 1. 黑龙江工程学院土木工程系, 哈尔滨 150050
- 邵纯红
- 1. 黑龙江工程学院土木工程系, 哈尔滨 150050
- 邹金龙
- 2. 黑龙江大学功能无机材料化学教育部重点实验室, 哈尔滨 150080;3. 黑龙江大学高效转化的化工过程与技术教育厅重点实验室, 哈尔滨 150080
- 邢子鹏
- 2. 黑龙江大学功能无机材料化学教育部重点实验室, 哈尔滨 150080
- 摘要：以污泥碳（SC）中回收的铝酸钠为铝源，在制备Al（OH）3的过程中加入表面活性剂PEG-1000（比例在0.01%~0.6%变化），考察其对Al（OH）3表面形貌和结构的影响.研究发现，当加入PEG-1000比例较小时，其空间位阻作用抑制了粒子之间的键合作用，使得Al（OH）3的沉淀效率较高、粒子尺寸较小，也能有效地阻止颗粒的团聚，SBET可以达到340 m2·g-1以上.当PEG-1000加入比例较大时，Al3+的沉淀效率逐渐降低，所得Al（OH）3粒子的尺寸变大，Al（OH）3的SBET和孔体积逐渐变小，平均孔径变大；原因是增多的PEG-1000分子会被包进Al（OH）3的结构中，限制了PEG-1000的表面交联和吸附，使空间位阻效应变差.—CH2—振动峰的出现说明PEG-1000是通过形成化学键的方式连接在Al（OH）3的表面基团上.PEG-1000的使用对于以污泥为铝源制备分散性好、尺寸较小和SBET较大的非晶态Al（OH）3具有重要作用.
- Abstract：In this study, surface morphology and structure of Al(OH)3 were investigated by adding a surfactant (PEG-1000, adding ratio of 0.01%~0.6%) into the sodium aluminates reclaimed from the carbonized wastewater treatment sludge. It was found that when adding a smaller proportion of PEG-1000, the cooperation between the particles was inhibited by its steric effect, which contributed to the efficient precipitation, small particle size, and good particles dispersion. SBET of Al(OH)3 could reach more than 340 m2·g-1. When adding a larger proportion of PEG-1000, the Al(OH)3 precipitation efficiency, SBET and pore volume decreased, while the particle size and average pore diameter of Al(OH)3 increased. The reason was that more PEG-1000 was packed into Al(OH)3 structure under this condition, which led to the inhibition of the adsorption and surface cross-linking of PEG-1000. Therefore, the steric effect of PEG-1000 was correspondingly deteriorated. The presence of —CH2— vibration peak indicated that the PEG-1000 was connected with the Al(OH)3 surface groups through the formation of chemical bonds. PEG-1000 has an important role for preparing the dispersive, smaller size, larger SBET and amorphous Al(OH)3 with the use of sludge as the aluminum source.
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