%0 Journal Article
%T 微波改性凹凸棒处理含铬废水的研究<br>Study on the Treatment of Chromium Containing Wastewater by Microwave Modified Attapulgite
%A 聂佳慧
%A 陈映全
%A 郑嘉轩
%A 王雨佳
%A 米璇
%A 常国华
%A 高天鹏
%J Advances in Environmental Protection
%P 1163-1172
%@ 2164-5493
%D 2022
%I Hans Publishing
%R 10.12677/AEP.2022.126144
%X 以凹凸棒为吸附材料，在不同微波改性条件下研究其对含Cr<sup>6+</sup>废水的处理效果。分析了不同微波改性时间、温度、Cr<sup>6+</sup>初始浓度、投加量、pH值等因素对含铬废水中Cr<sup>6+</sup>的去除效果，并探讨了相关机理。结果表明：在改性温度为125℃、时间为3 min的条件下对凹凸棒进行微波处理得到改性过的凹凸棒，25℃下，向pH值为1的含Cr<sup>6+</sup>初始浓度为400 mg/L的含铬废液中投加20 g/L的凹土，去除率最高可达97.00%；吸附过程符合Langmuir等温吸附模型，饱和吸附容量为170.26 mg/g。凹凸棒土经过微波改性吸附处理后晶体结构并未发生显著变化，但羟基-OH的数量明显下降，孔隙体积及比表面积显著增大，可供Cr<sup>6+</sup>的结合位点增多。<br />
Using attapulgite as an adsorption material, the treatment effect of Cr<sup>6+</sup> containing wastewater was studied under different microwave modification conditions. The effect of different microwave modification time, temperature, initial concentration, dosage and pH value of Cr<sup>6+</sup> on the removal of Cr<sup>6+</sup> from chromium-containing wastewater was analyzed, and the related mechanism was dis-cussed. The results show that the modified attapulgite is obtained by microwave treatment at 125？C for 3min. At 25？C, 20 g/L of attapulgite is added to the chromium-containing waste liquid containing Cr<sup>6+</sup> at pH 1 and an initial concentration of 400 mg/L. The removal rate of attapulgite can reach 97.00%. The adsorption process was consistent with Langmuir isothermal adsorption model, and the saturated adsorption capacity was 170.26 mg/g. After microwave modification and adsorption, the crystal structure of attapulgite did not change significantly, but the amount of hydroxyl O-H decreased significantly, while the pore volume and specific surface area increased significantly, and the binding sites of Cr<sup>6+</sup> increased.
%K 微波改性，凹凸棒，吸附，含Cr<sup>6+</sup>废水<br>Microwave Modification
%K Attapulgite
%K Adsorption
%K Cr<sup>6+</sup> Containing Wastewater
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=59136