共查询到20条相似文献,搜索用时 62 毫秒
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Fenton试剂催化氧化法处理离子交换树脂再生废水 总被引:1,自引:0,他引:1
针对离子交换树脂再生废水中的难降解有机物利用Fenton试剂进行催化氧化处理。实验结果表明:当反应条件是H2O2与FeSO4·7H2O摩尔比为5:1、H:O2(30%)投加量为0.35mol/L(4次投加)、pH值为3.5、反应时间为2h时,废水的处理效果最佳;并采用正交实验确定了各反应因素对废水的CODcr去除效果的影响水平。 相似文献
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对亚麻混法纺纱废水的纺纱废水、煮漂废水和空调水3种废水进行分流预处理后废水采用以混凝沉淀法为主体的组合处理工艺,处理后废水COD、SS和色度的去除率分别为87.0%、88.9%和93.5%。处理后水质不仅能达到《污水综合排放标准》(GB8978-96)的要求,且能满足工艺用水要求,可全部回用于生产,实现废水零排放。 相似文献
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本文采用生物吸附再生曝气法处理SMZ、TMP和PNCT混合制药废水,用28升小型曝气装置,活性污泥经培养驯化后,连续稳定运行半年多时间.进水CODcr1200-1700mg/l,BOD_5250-800mg/l,HRT为17-21h,出水CODcr平均去除率81%,BOD_5平均去除率94%;胺基物和硝基物去除率也稳定在90%以上,取得了比较明显的去除效果. 相似文献
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粗纸废水的处理与回用 总被引:3,自引:0,他引:3
本文介绍了采用微滤——混凝沉淀法处理粗低废水的研究和工程实例.该法通过微滤回收纸浆,混凝沉淀去除粗纸废水的主要污染物.悬浮物去除率高达85%以上,COD_(cr)、BOD_5去除率均达75%以上. 相似文献
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矿山酸性废水重金属沉淀分离研究 总被引:3,自引:0,他引:3
矿山酸性废水对环境的污染包括酸性废水和重金属离子两个方面,矿山酸性废水的治理也包括酸性废水和重金属离子处理两方面的内容。重金属沉淀分离是利用重金属离子的氢氧化物和硫化物沉淀溶度积不同,在控制不同的沉淀条件下,进行特定离子的沉淀分离,从而使得废水中的重金属离子得到处理,分步沉淀使得回收沉淀物保持较高的有价金属品位,更易于资源化。分步沉淀反应后,进行相应的固/液分离,并回流部分沉淀物至沉淀反应池,固/液分离后出水,经pH调节,可以达标排放或回用。 相似文献
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试验分别研究了反渗透膜Duraslick RO2540和RE2540-TE对APT冶炼离子交换废水的处理效果。研究结果表明,在最佳压力条件下,Duraslick RO2540膜对Cl-的截留率为91.4%,产水率为16.9%;RE2540-TE膜对Cl-的截留率为93.4%,产水率为17.2%。在压力为1.7MPa,温度为25℃时,浓缩实验结果表明,产水中Cl-浓度和膜的截留率随着时间变化而逐渐增加,但膜通量逐渐减小,且RE2540-TE膜通量下降幅度较大。清洗后,RE2540-TE膜通量损失达到6%,而Duraslick RO2540膜通量恢复幅度为98%。 相似文献
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以Cu 2+-黄连素混合体系的含铜制药废水为研究对象,考察3种离子交换树脂(D152、D113和D401)对含铜废水中Cu 2+和黄连素的吸附性能并对树脂进行了筛选,对D401树脂进行了吸附动力学和吸附热力学拟合分析,同时考察该树脂在黄连素竞争吸附影响下对Cu 2+的去除效果。最后,在静态试验基础上开展了动态试验,考察D401树脂柱在3种流速〔1、2和5 BV(柱体积)/h〕下,进样量为1~20 BV时出水的Cu 2+和黄连素浓度。结果表明:D401树脂的比吸附量随温度升高而增加,随树脂投加量的增加而降低;该树脂在较宽的pH范围内对Cu 2+具有很好的选择吸附性,pH为5.0是最佳吸附条件,此时比吸附量可达39.87 mg/g。吸附过程可以通过Langmuir吸附等温线和伪二级动力学模型进行描述。动态试验中,树脂柱在1 BV/h的流速下,对Cu 2+有较好的去除效果;在3种流速条件下,对黄连素的吸附率均较低,进一步验证了该型树脂对Cu 2+具有很好的选择吸附性。 相似文献
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采用活性炭吸附的方法对锂电池产生的含酯废水进行预处理,研究了吸附时间、初始pH值和活性炭投加量对废水COD去除的影响.吸附饱和后的活性炭用微波进行再生,考察了辐照时间、微波功率及再生次数对活性炭再生效果的影响.结果表明,当活性炭投加量为10g/L时,吸附60min,含酯废水的COD去除率为69.5%,可生化性从原水的0.05提高到0.25.当微波功率为420W、辐照时间为6min时,活性炭可被有效地再生,再生效率高达98.0%,活性炭损失率约为5.2%.再生前后活性炭的红外光谱图表明,活性炭表面官能团发生了变化,促进活性炭对污染物质的吸附. 相似文献
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Electro-assisted regeneration of ion exchange resins 总被引:1,自引:1,他引:0
Zhigang LIU Ying WANG Yansheng LI Hui CHANG 《Frontiers of Environmental Science & Engineering in China》2008,2(4):410-414
Electro-assisted regeneration (EAR) for the mixed bed of strongly acidic cation and weakly basic anion exchange resins with
the Al(OH)3 suspension in a three-compartment cell was investigated. The desalination experiments were carried out to evaluate
the characteristic of the regenerated mixed resins. Experimental results showed that the efficiency of resin regeneration
was strictly dependent on the voltage, regeneration time, and feed regenerant flow rate. The amount of the effluent reached
50 times the volume of the resins bed, and the conductivity was less than 1.0 μs/cm. Compared to the conventional ER, the
total effluent volume of EAR was about 1000 mL more than that of ER under the same conditions, and the outlet conductivity
was significantly lower. The desalination and regeneration reaction mechanisms of the mixed resins indicated the regeneration
efficiency of resin with Al(OH)3 as the regenerant was much higher than that with H2O. 相似文献
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为了缓解油田污水对离子交换膜的污染程度,使电渗析技术更好地用于油田污水处理,从而实现含聚合物采油污水的良性循环,针对含聚采油污水对离子交换膜的污染情况进行了考察.实验考察了相同工况下,淡室溶液电导率下降到0.9mS·cm-1所经历的时间、平均电流和膜面电阻等参数的变化,确定了离子交换膜的污染状况,分别考察了含聚合物采油污水中的固体悬浮物、聚合物和原油对离子交换膜性能的影响.实验结果表明,部分固体悬浮物集聚在阴离子交换膜和阳离子交换膜表面甚至内部从而造成膜污染,但相对于阴膜,悬浮物对阳膜性能的影响更严重;聚合物可聚集在阴膜表面,对于阴膜的透过性有一定的影响;原油在阴膜表面甚至内部形成致密的油膜,对其造成严重污染,但对阳膜的影响较小.利用酸碱液以及非离子表面活性剂(AEO-9)作为清洗剂,并添加少量的助洗剂(如三聚磷酸钠),阴膜过滤能力可以得到有效恢复. 相似文献
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The occurrence of antibiotics in the environment has recently raised serious concern regarding their potential threat to aquatic ecosystem and human health. In this study, the magnetic ion exchange(MIEX) resin was applied for removing three commonly-used antibiotics, sulfamethoxazole(SMX), tetracycline(TCN) and amoxicillin(AMX) from water.The results of batch experiments show that the maximum adsorption capacities on the MIEX resin for SMX, TCN and AMX were 789.32, 443.18 and 155.15 μg/m L at 25°C,respectively, which were 2–7 times that for the powdered activated carbon. The adsorption kinetics of antibiotics on the MIEX resin could be simulated by the pseudo-second-order model(R~2= 0.99), and the adsorption isotherm data were well described by the Langmuir model(R~2= 0.97). Solution p H exhibited a remarkable impact on the adsorption process and the absorbed concentrations of the tested antibiotics were obtained around the neutral p H.The MIEX resin could be easily regenerated by 2 mol/L Na Cl solution and maintained high adsorption removal for the tested antibiotics after regeneration. Anion exchange mechanism mainly controlled the adsorption of antibiotic and the formation of hydrogen binding between the antibiotic and resin can also result in the increase of adsorption capacity. The high adsorption capacity, fast adsorption rate and prominent reusability make the MIEX resin a potential adsorbent in the application for removing antibiotics from water. 相似文献