应用突破性生物吸附剂在实验室规模连续固定床柱中从合成和实际废水中去除重金属。
Application of a breakthrough biosorbent for removing heavy metals from synthetic and real wastewaters in a lab-scale continuous fixed-bed column.
机构信息
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
出版信息
Bioresour Technol. 2017 Apr;229:78-87. doi: 10.1016/j.biortech.2017.01.016. Epub 2017 Jan 10.
A continuous fixed-bed study was carried out utilising a breakthrough biosorbent, specifically multi-metal binding biosorbent (MMBB) for removing cadmium, copper, lead and zinc. The effect of operating conditions, i.e. influent flow rate, metal concentration and bed depth was investigated at pH 5.5±0.1 for a synthetic wastewater sample. Results confirmed that the total amount of metal adsorption declined with increasing influent flow rate and also rose when each metal concentration also increased. The maximum biosorption capacities of 38.25, 63.37, 108.12 and 35.23mg/g for Cd, Cu, Pb and Zn, respectively, were achieved at 31cm bed height, 10mL/min flow rate and 20mg/L initial concentration. The Thomas model better described the whole dynamic behaviour of the column rather than the Dose Response and Yoon-Nelson models. Finally, desorption studies indicated that metal-loaded biosorbent could be used after three consecutive sorption, desorption and regeneration cycles by applying a semi-simulated real wastewater.
采用突破型生物吸附剂（多金属结合生物吸附剂，MMBB）进行了连续固定床研究，用于去除镉、铜、铅和锌。在 pH 值为 5.5±0.1 的条件下，考察了操作条件（即进水流量、金属浓度和床层深度）对合成废水样品的影响。结果证实，随着进水流量的增加，金属吸附总量减少，而每种金属浓度的增加也导致吸附总量增加。在床层高度为 31cm、流速为 10mL/min 和初始浓度为 20mg/L 的条件下，Cd、Cu、Pb 和 Zn 的最大生物吸附容量分别为 38.25、63.37、108.12 和 35.23mg/g。Thomas 模型比 Dose Response 和 Yoon-Nelson 模型更能描述整个柱的动态行为。最后，解吸研究表明，在经过三次连续的吸附、解吸和再生循环后，应用半模拟实际废水可以使用负载金属的生物吸附剂。
Zotero 插件