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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 被引量:20

Adsorption properties of modified straw materials for dye and heavy metals removal in high-salt wastewater
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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(Cu^2+)和铬离子(Cr^6+)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<Cu^2+<Cr^6+<MB.在高盐度下,四元混合体系中MB和Cu^2+的吸附量均比染料/重金属二元混合体系的要大,Cr^6+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. 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(Cu^2+) and chromium ion(Cr^6+) 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>Cu^2+>Cr^6+>MB. Interestingly, under high salinity, the adsorption capacity of MB and Cu^2+ in the quaternary mixed system is larger than that of the dye/heavy metal binary mixed system, and the adsorption amount of Cr^6+ it is still considerable. WS-CA-AM has great potential in the treatment of high-salt printing and dyeing wastewater.
作者 陆建 李耀悦 周彦波 LU Jian;LI Yaoyue;ZHOU Yanbo(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237)
出处 《环境科学学报》 CAS CSCD 北大核心 2019年第10期3395-3401,共7页 Acta Scientiae Circumstantiae
基金 国家自然科学基金(No.51778230) 上海市青年科技启明星计划(No.17QA1401000)
关键词 改性秸秆 高盐印染废水 吸附 modified straw high-salt printing and dyeing wastewater adsorption
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