共查询到19条相似文献,搜索用时 93 毫秒
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主要介绍了壳聚糖的絮凝原理、改性方法及其衍生物对重金属离子的吸附作用,并展望了其在重金属污染废水处理方面的应用前景。 相似文献
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综述了近年来壳聚糖及其衍生物在重金属废水处理、废水脱色及其对废水其它污染组分的吸附处理的研究现状。 相似文献
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介绍了近年来壳聚糖在处理工业废水、生活污水和净化饮用水中的应用。由于壳聚糖具有易分离、絮凝作用强、无污染等特点,因此在废水处理中应用广泛,是一种很有发展前途的高分子絮凝剂。 相似文献
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壳聚糖在水处理中的应用研究进展 总被引:1,自引:0,他引:1
壳聚糖作为一种来源广泛的无毒无害的高分子聚合物,因其在酸性溶液中其氨基可结合H+,是一种典型的阳离子聚电解质,能够吸附絮凝废水中有机物,同时其氨基还能鳌合去除许多重金属离子,是一种优良的水处理剂。本文介绍了它在水处理中的研究和应用情况。 相似文献
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论述了目前壳聚糖这种新型的天然高分子有机物在水处理上的应用,由于壳聚糖具有环保、无毒、资源丰富且具有吸附作用等特点,使得它在水处理中的应用越来越受到重视. 相似文献
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化学絮凝法在工业有机污水处理中的应用 总被引:7,自引:1,他引:6
文章对化学絮凝法处理工业有机污水的理论基础、科研和应用、改进途径和方法等作了介绍和综述,从而阐明了该法具有基建投资省、适应性强,操作管理简单等优点。 相似文献
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A bioflocculant, quaternized carboxymethyl chitosan (QCMC), was developed by the quaternization of N,O‐carboxymethyl chitosan (N,O‐CMC) and characterized by FTIR, 1H‐NMR, GPC, and potentiometry. The efficiency of the removal of chemical oxygen demand (COD) in printing wastewater by this flocculant was further reported. Results indicated that the capacity of QCMC to remove the COD from tested wastewater was the best one among the investigated flocculants. The pH had great influence on this capacity and the suitable pH for QCMC to treat the tested wastewater was about 5.0. The utilization of aid‐flocculant, especially bentonite, could improve this capacity obviously, and the increase of mass ratio of bentonite to QCMC resulted in the increase of the capacities of complex flocculant to remove the COD from the tested wastewater. When the mass ratio of bentonite to QCMC was 40, pH of wastewater was 5.0 and amount of complex flocculant in the wastewater was from 2500 to 3142 mg L?1, the removal ratio of COD was more than 80%. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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氢氧化镁在工业废水处理中应用研究进展 总被引:4,自引:0,他引:4
郭如新 《精细与专用化学品》2010,18(4):42-47
对氢氧化镁在工业废水处理中应用研究进展进行了评述;介绍了环保级氢氧化镁性能特征及其在酸性废水处理、废水中重金属离子脱除、印染废水脱色与有机物脱除以及硫化氢脱除方面的应用;展望了氢氧化镁的发展前景。 相似文献
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Chitosan (an amino‐polysaccharide obtained from deacetylation of chitin, the major constituent of crustaceous shells and insect cuticles) presents a cationic character in acidic media allowing its dissolution, its shaping and possible ion‐exchange interactions with anionic compounds (a property applied in adsorption and coagulation–flocculation processes). In neutral media, non‐protonated amino groups allow complexation of metal cations or organic chemicals. These different properties explain the interest taken by the scientific community in using this biopolymer. In solution it contributes to complex metals and their recovery by complexation‐assisted ultrafiltration. It can also be used to coagulate–flocculate organic compounds (as anionic dyes). In the solid state, it can be used for metal ion adsorption, as well as adsorption of organic compounds (dyes, pesticides, drugs, endocrine disruptors, etc.). The adsorption and coagulation–flocculation processes will be compared and examples considered. Moreover, it is noteworthy that the thermal degradation of this type of material is also more environmentally friendly than that of conventional synthetic resins (production of hazardous by‐products, etc.), a supplementary advantage of these biopolymer‐based sorbents. Combined with its ability to be chemically or physically modified improving the potential and phase separation of chitosan‐based materials, all these properties mean it is an excellent candidate for wastewater treatment. © 2017 Society of Chemical Industry 相似文献
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络合-超滤技术深度处理矿山重金属废水 总被引:1,自引:2,他引:1
采用壳聚糖络合-超滤技术深度处理有色金属矿山重金属废水,考察了pH值、壳聚糖/铅离子质量比(P/M)、离子强度、运行时间等因素对Pb2+、Cd2+截留率和膜通量的影响。结果表明,在原水Pb2+、Cd2+的质量浓度分别为1.0、0.1 mg/L,pH值为7,P/M值为6的条件下,Pb2+和Cd2+的截留率分别达到96.62%和96.26%,出水满足GB 3838—2002《地表水环境质量标准》中Ⅲ类标准的要求。NaCl浓度的增大使重金属离子的截留率有所降低;随着运行时间的延长,膜通量逐渐减小最后趋于稳定,而运行时间对Pb2+、Cd2+的截留率影响不大。 相似文献
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壳聚糖衍生物的合成及其在化妆品中的应用 总被引:8,自引:2,他引:8
综述了目前几类壳聚糖衍生物:羧甲基壳聚糖、羧基壳聚糖、壳聚糖羟烷基衍生物、壳聚糖或酰基化衍生物、壳聚糖磺化衍生物、壳聚糖季铵盐的制备方法.分别介绍了它们的性能和在护肤品、洗发香波、头发调理剂、定型剂以及洗浴剂中的应用,同时举出了较典型的应用实例,为此方面研究工作提供了参考配方。 相似文献