%0 Journal Article %T 柠檬酸改性啤酒糟对Pb2+/Zn2+的吸附分离研究 %A 林海 %J 现代食品科技 %D 2016 %R 10.13982/j.mfst.1673-9078.2016.2.020 %X 以啤酒糟为原材料进行柠檬酸改性，使用BET、FT-IR对改性前后的酒糟进行表征，研究了酒糟改性前后对单组分Pb2+/Zn2+进行动态吸附处理的效果变化，并且以改性酒糟为吸附剂，研究在固定床中对重金属Pb2+、Zn2+吸附分离的各个影响因素，为废水中铅锌分离的实际应用提供了新思路。实验发现，柠檬酸改性啤酒糟的微介孔分布比例和比表面积均有所增大，其羧基基团也有所增加，证明柠檬酸改性基本是成功的。在Pb2+/Zn2+吸附分离体系中，废水pH值、床层高度对改性啤酒糟吸附分离Pb2+、Zn2+影响较大，而两组分初始浓度比对其影响较小。研究发现在铅、锌离子浓度分别为30 mg/L、15 mg/L，pH值为4.5，流速为6 mL/min，床层高度为12 cm时，经改性啤酒糟固定床吸附可以有效实现废水中铅、锌离子分离，吸附后出水铅离子浓度低于国标中规定的0.5 mg/ L，吸附分离操作时间为8.67 h。</br>Brewer’s spent grains (BSGs) were used as the raw material to conduct citric acid modifications. The raw and modified BSGs were characterized by Brunauer-Emmett-Teller (BET) surface area analysis and Fourier transform infrared spectroscopy (FTIR), and the changes in the performance of dynamic adsorption of single component Pb2+ and Zn2+ before and after the BSG modification were studied. Additionally, various factors of the fixed bed on the adsorption and separation of heavy metal ions Pb2+ and Zn2+ were investigated, providing a novel approach for the practical application of BSGs in the separation of Pb2+ and Zn2+ in wastewater. The test results showed that the mesopore/micropore ratio and specific surface area of citric acid-modified BSGs increased to some extent, and the number of carboxyl groups increased, demonstrating that citric acid modification was generally successful. In the Pb2+ and Zn2+ adsorption and separation system, the pH of wastewater and the height of the adsorption column had a relatively large impact on the selective adsorption and separation of Pb2+ and Zn2+ using modified BSGs, while the initial concentration ratio of the two components had a relatively small impact. The results showed that the modified BSG fixed bed could effectively separate lead and zinc ions in wastewater when the lead and zinc ion concentrations were 30 mg/L and 15 mg/L, respectively, pH was 4.5, flow rate was 6 mL/min, and the height of the adsorption column was 12 cm. After adsorption, the concentration of Pb2+ in the effluent was less than the 0.5 mg/L that is required by the national standard (GB), and the operation time for adsorption and separation was 8.67 h. %K 啤酒糟 铅锌离子 动态吸附 吸附分离< %K /br> %K Brewer’s spent grain lead and zinc ions dynamic adsorption adsorption separation %U http://www.xdspkj.cn/ch/reader/view_abstract.aspx?file_no=20160220&flag=1