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首页> 外文会议>International Conference on Remote Sensing, Environment and Transportation Engineering >Synthesis of Lignin-base Bead Adsorbent and its Application in Removing Cr (VI) from Aqueous Solution
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Synthesis of Lignin-base Bead Adsorbent and its Application in Removing Cr (VI) from Aqueous Solution

机译：木质素碱珠子吸附剂的合成及其在水溶液中除去Cr（VI）的应用

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A novel spherical lignin-base adsorbent (L-BAA) was prepared by reversed phase suspension polymerization technique. The L-BAA was characterized by element analysis and FTIR spectra. The modified lignin beads (L-BAA) were used to adsorb Cr (VI) from aqueous solution. The effects of the contact time, the pH value, the initial concentration and the temperature on the adsorption were investigated. It was found that Cr (VI) adsorption was greatly dependent on the pH and temperature of the Cr (VI) aqueous solution. When the temperature was 25°C, the maximum capacity of 417.26 mg/g was attained at 0.82 pH. The adsorption capacity is better than other reported adsorbents. All of the end pHs were higher than the initial pHs. The results indicated that the adsorption belongs in ligand exchange mechanism. High temperature promoted adsorption, the high capacity 473.80 mg/g was attained at 35°C and the adsorption efficiency was up to 94.76%. This result indicated that the adsorption was not only physical but also chemical, which could be proved more by the FTIR spectra, and the adsorption was an endothermic progress.
机译：通过反相悬浮聚合技术制备新型球形木质素基质吸附剂（L-BAA）。 L-BAA的特征在于元素分析和FTIR光谱。改性木质素珠粒（L-BAA）用于从水溶液中吸附Cr（VI）。研究了接触时间，pH值，初始浓度和吸附对吸附的影响。发现Cr（vi）吸附极大地取决于Cr（vi）水溶液的pH和温度。当温度为25℃时，最大容量为417.26mg / g，达到0.82 pH值。吸附容量比其他报道的吸附剂更好。所有末端pH值高于初始pH。结果表明，吸附属于配体交换机制。高温促进吸附，高容量473.80mg / g在35℃下达到，吸附效率高达94.76％。该结果表明，吸附不仅是物理而且还可以通过FTIR光谱来证明，吸附是吸热进展。

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