研究报告
陆建,李耀悦,周彦波.改性秸秆材料对高盐废水中染料和重金属的吸附性能研究[J].环境科学学报,2019,39(10):3395-3401
改性秸秆材料对高盐废水中染料和重金属的吸附性能研究
- Adsorption properties of modified straw materials for dye and heavy metals removal in high-salt wastewater
- 基金项目：国家自然科学基金（No.51778230）；上海市青年科技启明星计划（No.17QA1401000）
- 作者
- 单位
- 陆建
- 华东理工大学资源与环境工程学院, 国家环境保护化工过程环境风险评价与控制重点实验室, 上海 200237
- 李耀悦
- 华东理工大学资源与环境工程学院, 国家环境保护化工过程环境风险评价与控制重点实验室, 上海 200237
- 周彦波
- 华东理工大学资源与环境工程学院, 国家环境保护化工过程环境风险评价与控制重点实验室, 上海 200237
- 摘要：高盐印染废水是一种难处理的工业废水，其盐度高、色度高，含有染料、重金属等多种污染物.本文针对高盐印染废水中污染物的特点，设计了一种制备过程简单、成本经济的柠檬酸/丙烯酰胺改性秸秆材料（WA-CA-AM），并通过SEM、FI-IR和DTG等表征手段分别观测材料形貌、测定表面官能团和热稳定性.同时在不同盐度下，考察了单元/多元污染物体系中WS-CA-AM对4种污染物亚甲基蓝（MB）、甲基橙（MO）、铜离子（Cu2+）和铬离子（Cr6+）的吸附效果.结果表明：在单元污染物体系中，WS-CA-AM对污染物的吸附量随盐度的升高而降低；在多元污染物体系中同时存在竞争吸附和协同吸附；通过二元体系得出4种污染物的吸附受盐度影响大小顺序为MO < Cu2+ < Cr6+ < MB.在高盐度下，四元混合体系中MB和Cu2+的吸附量均比染料/重金属二元混合体系的要大，Cr6+的吸附量虽受到一些抑制但依然可观，表明改性秸秆材料在高盐印染废水的处理中具有巨大的应用潜力.
- Abstract：High-salt printing and dyeing wastewater is a kind of refractory industrial wastewater with high salinity, high chroma, and contains many pollutants such as dyes and heavy metals. Aiming at the characteristics of pollutants in high-salt printing and dyeing wastewater, this paper designed a citric acid/acrylamide modified straw material (WA-CA-AM) with simple and green synthesis process and low cost. The morphology of the material, surface functional groups and thermal stability were observed by means of SEM, FI-IR and DTG. The adsorption performance of WS-CA-AM to different pollutants such as Methylene blue (MB),Methyl orange (MO), copper ions (Cu2+) and chromium ion (Cr6+) under different salinity in unit/multi-component pollutant system was studied. The results showed that in a single pollutant system, with the gradual increase of salinity, the adsorption amount of WS-CA-AM to pollutants gradually decreases; competitive adsorption and synergistic adsorption existed in multi-pollutant systems; the salinity resistance of four pollutants was MO>Cu2+ > Cr6+ > MB. Interestingly, under high salinity, the adsorption capacity of MB and Cu2+ in the quaternary mixed system is larger than that of the dye/heavy metal binary mixed system, and the adsorption amount of Cr6+ it is still considerable. WS-CA-AM has great potential in the treatment of high-salt printing and dyeing wastewater.
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