层状双金属氢氧化物去除活性黑5

EDTACoMgAl Layered Double Hydroxides for Reactive Black 5 Treatment

摘要:

采用共沉淀法制备EDTACoMgAl层状双金属氢氧化物（EDTACoMgAlLDHs），通过X射线衍射仪（XRD）、电感耦合等离子体发射光谱仪（ICP）等对材料进行表征，并以活性黑5为模拟染料废水，研究了污染物浓度、pH、温度等因素对吸附效果的影响，初步探讨了其作为类Fenton催化剂的反应性能.结果表明：常温、中性条件下，其对活性黑5的最大平衡吸附量达到330 mg?g-1；随着污染物浓度的增大，EDTACoMgAlLDHs的吸附和催化H2O2氧化效果呈互补趋势，对于初始质量浓度在120~360 mg?L-1范围内的活性黑5的总去除率均能达到90%以上.

Abstract:

A new nano composite matertal of EDTACoMgAl layered double hydroxides (EDTACoMgAlLDHs) was synthesized in the ways of coprecipitation. Then, Xray diffraction（XRD） and inductively coupled plasma（ICP） were used to characterize the properties of the material. The azo dye reactive black 5 was chosen as a target pollutant to study the effects of initial pH, concentration of target pollutant and temperature on adsorption. Finally, the properties of EDTACoMgAlLDHs as catalyst for Fenton reaction were discussed preliminarily. It is found that the maximum equilibrium adsorption was 330 mg?g-1 under the conditions of normal temperature and neutral pH. The catalytic oxidation and adsorption efficiency was complementary with increasing pollutant concentration. The total removal efficiency reaches up to 90% with the initial pollution concentration range of 120~360 mg?L-1.