• 关键词：介孔吸附剂  重金属  Cr³⁺  Pb²⁺

• 基金项目：国家科技重大专项(No.2008ZX07421-002)

• 吴胜举
• 同济大学环境科学与工程学院, 上海 200092

• 吴翠荣
• 淄博职业学院化学工程系, 淄博 255013

• 李风亭
• 同济大学环境科学与工程学院, 上海 200092

• 摘要：采用挥发诱导自组装(EISA)技术,以乙醇为溶剂,十六烷基三甲基溴化铵(CTAB)为结构导向剂,合成了孔径为5.4nm的巯基功能化介孔材料,并用FTIR、EA、N₂吸附-脱附和XRD分析技术对介孔材料进行了表征.同时,以Cr³⁺、Pb²⁺为目标污染物,考察了介孔吸附剂对污染物的吸附性能.结果表明,介孔吸附剂的吸附性能受pH值(初始与终态值)、振荡时间、温度和重金属离子初始浓度的影响显著.在T=303K、pH=5、振荡时间为1h,振荡频率为150r·min^-1,污染物初始浓度低于0.4mmol·L^-1时,吸附剂对Cr³⁺、Pb²⁺的去除率分别在85%和90%以上.介孔吸附剂对Cu²⁺、Pb²⁺的等温吸附行为与Langmuir模型相吻合(R²>0.992).

• Abstract：With ethanol as the solven and,hexadecyl trimethyl ammonium bromide(CTAB) as the structure-directing agent,a new kind of mesoporous absorbent was synthesized via integration of a "One-step" procedure and "Evaporation-Induced Self-Assembly". The adsorbent exhibited a pore diameter centered at 5.4 nm. The adsorbent was characterized by elemental analysis,X-ray diffraction(XRD),nitrogen adsorption desorption and FTIR spectroscopy. The adsorption of Cr³⁺、Pb²⁺ as model ions was investigated. The results showed that the adsorption abilities were obviously affected by pH(initial and final),oscillation time,temperature and initial concentration of metal ions. When temperature was 303K,pH was 5.0,oscillation time was 1 hour,oscillation frequency was 150 r·min^-1 and the initial concentrations of Cr³⁺ and Pb²⁺ were lower than 0.4 mmol·L^-1,the removal rates of Cr³⁺、Pb²⁺ were up to 85% and 90%,respectively. The adsorption isotherm mechanism followed the Langmuir model with R²>0.992.

• Key words：mesoporous adsorbent  heavy metal  Cr³⁺  Pb²⁺

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