| 陈 劲，蒋新元，杨振飞，张 舸，贾继朝.高锰酸钾改性山棕丝对Pb（Ⅱ）吸附性能的研究[J].广东农业科学,2017,44(7):53-58 |
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高锰酸钾改性山棕丝对Pb（Ⅱ）吸附性能的研究 |
| Modification of palm by potassium permanganate and its adsorption of Pb（Ⅱ） |
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| DOI：10.16768/j.issn.1004-874X.2017.07.009 |
| 中文关键词: 山棕丝 Pb（Ⅱ） 吸附材料 吸附性能 |
| 英文关键词: palm Pb（Ⅱ） adsorbing material adsorption property |
| 基金项目:湖南省高等学校木竹资源高效利用协同创新中心项目（ 湘教通［2015］351 号） |
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| 中文摘要: |
| 以山棕丝为原料，采用高锰酸钾回流氧化法对其改性，通过单因素实验及正交实验优化确定最
优改性工艺，制备对Pb（Ⅱ）具有良好吸附能力的生物吸附材料。结果表明，高锰酸钾改性山棕丝最优工
艺为：反应温度60℃，反应时间4 h，高锰酸钾溶液浓度0.08 mol/L，pH 值3；吸附性能研究表明，由最优工
艺制备的改性山棕丝在常温下对400 mg/L Pb（Ⅱ）溶液的最大吸附量为85.85 mg/g，为未改性山棕丝的8.42
倍；吸附动力学研究表明，改性山棕丝对Pb（Ⅱ）的吸附符合准二级动力学方程，为速率受限过程。采用傅
立叶红外光谱（FT-IR）对改性前后山棕丝结构进行表征，结果表明：高锰酸钾的强氧化性使得山棕丝纤维
表面产生了较多的羧基，增加了其表面的吸附位点，从而使改性山棕丝对 Pb（Ⅱ）的吸附能力大幅提高。 |
| 英文摘要: |
| In order to obtain adsorption material with excellent adsorption properties for Pb（ II），palm
was used as raw material，and its structure was modified by refluxing of potassium permanganate. The optimum
experiment was carried out by single factor experiments and orthogonal experiment. The biological adsorbent with
great adsorption capacity of Pb（Ⅱ） was prepared. The results showed that the optimum conditions of modification
were as follows：the reaction temperature was 60℃，the reaction time was 4 h，the concentration of potassium
permanganate solution was 0.08 mol/L，pH value was 3. Study on adsorption performance showed that，at ordinary
temperature，the maximum adsorption capacity of the modified palm by the optimum preparation process of Pb（Ⅱ）
was 85.84 mg/g in 400 mg/L Pb（Ⅱ） solution，which was 8.42 times of the unmodified palm’s adsorption capacity.
The results of dynamic adsorption experiment indicated that the adsorption process of Pb（Ⅱ） by modified palm was
in accordance with the pseudo two order kinetic equation model，which was a rate limited adsorption process. The
structure was characterized by Fourier transform infrared（ FT-IR），the analysis of FT-IR showed that the strong
oxidizing property of potassium permanganate produced a lot of carboxyl groups on the surface of palm and increased
the adsorption sites，so that the adsorption capacity of modified palm for Pb（Ⅱ） was improved significantly. |
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