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土霉素结晶母液是一类高浓度有机废水,其中含有残留的土霉素对多种微生物产生了抑制性,对后续的生化处理有很大影响[1]。本文采用离子交换法使母液中残留的土霉素与其它有机污染物分开处生化处理的难度[2]。1试验方法1.1废水水质废水为土霉素结晶母液,取自内蒙古赤峰制药厂土霉素生产车间,废水水质[3]如表1所示,在整个实验过程中,废水的TN、SO42-、草酸浓度较高,土霉素结晶母液的BOD5/CODCr和BOD/N比值都较低。直接生化处理效果较差。表1土霉素结晶母液水质状况g/LpH CODCrBOD5TN NH4 -N SO42-草酸土霉素4~5 15~20 1.5~4.0 2.1… 相似文献
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治理含汞废水是水处理技术的一项重大课题,本文综合评述了阳离子交换树脂、阴离子交换树脂、螫合树脂、离子交换纤维和腐植酸离子交换树脂等离子交换剂治理含汞废水的工艺原理,并介绍了对几种含汞废水的治理实例。 相似文献
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本文采用离子交换法处理含铬(VI)废水。实验结果表明,离子交换法处理含铬废水的最佳条件为:废水pH为4、交换时间为60min、交换温度为45℃、树脂投加量为0.9g。在此条件下,可使50mL废水中铬(VI)浓度由50mg/L降至0.02mg/L,达到了污水综合排放标准。 相似文献
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本文综合介绍了阳离子交换树脂、阴离子交换树脂在处理电镀工业各种含锌废水的应用原理,工艺路线和影响因素。并列举了一些应用实例。 相似文献
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针对硝铵装置目前混合废水排放不达标的现状,对采用阴离子固定床除去NO3-,净水入冷凝液系统和先汽提、后脱盐,净水回收利用两种处理方案进行了分析及成本核算比较,并提出建议。 相似文献
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采用离子交换法分离铜酞菁废水中的钼,筛选出D301树脂分离性能最佳。通过静态吸附实验探讨树脂用量、溶液pH、初始浓度、吸附时间、温度等因素对吸附的影响。结果表明,树脂用量1 mL,pH=3.0,吸附时间18 h更适合作为吸附操作条件,提高初始浓度会使平衡吸附量增加,D301树脂吸附钼的过程符合Langmuir方程,为自发、熵增和吸热的过程。动态吸附实验得出,最佳进液流量为20 BV/h,树脂的饱和吸附量为181 mg/mL,钼的吸附率为31.5%。使用10%的氨水在2 BV/h的流量条件下对饱和树脂进行解吸,解吸剂用量5 BV时,解吸率可达84%,钼的富集倍数为152倍。 相似文献
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离子交换法提取井冈霉素的研究 总被引:5,自引:0,他引:5
本文就不同树脂对井冈霉素的吸附性能及其影响因素作了研究,得到了离子交换法提取井冈霉素较佳工艺条件,从而获得了高单位效价的井冈霉素粉剂。 相似文献
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《分离科学与技术》2012,47(17):2717-2725
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The desalting property of ion-exchange resins in organic solvent is reported by using potassium acetate as a model compound. The experimental results show that the solvability of the solvent, stirring speed, and temperature are the factors which influence the ion-exchange rate. The increase of solvability, stirring speed and temperature will speed up the ion-exchange process. 相似文献
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采用A325树脂对某含钼废水进行吸附,回收废水中的钼并制得了三氧化钼产品。整个过程分为废水中钼的吸附、解吸、除杂净化和三氧化钼的制备等几个步骤。在钼的吸附过程中,当原料液钼浓度2.8g/L时,适宜的工艺条件是:v(料液):v(树脂)=45:1,料液pH值为3.0、料液温度25±2℃、料液流速10mL/min,钼的吸附率可达到94.3%。解吸时,采用10%的氨水溶液作为解吸液,口(解吸液):v(树脂)=2:1进行配料。富钼解吸液再经除杂净化、酸化沉淀、过滤、洗涤、烘干、煅烧,制得三氧化钼产品。 相似文献
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《分离科学与技术》2012,47(7):1025-1042
ABSTRACT A proposed operation of a semicontinuous fluidized-bed ion-exchange system was studied. The system splits a liquid current into two currents, one being more concentrated and the other more depleted. This operating technique has been used to split up a mixture of alkaline ions (Na+, K+) using a strongly acidic resin. The equipment operates simultaneously in two multistage columns, one for loading and the other for elution of the resin. The experimetal testing system employs a hydrometallurgy wastewater containing cobalt and copper as heavy metallic ions, and the resin used was of the chelating iminodiacetic type, Lewatit TP-207. At cyclic steady state, the equipment can split up the wastewater, producing an effluent concentrated in cobalt in the outlet stream of the loading column, and a concentrated stream of copper in the effluent of the elution column. The hydrodynamics and approach to the stationary state of the system were analyzed, and the selective recovery of metals was subsequently tested experimentally. This behavior presents certain similarities with a parametric pumping operation of the system, with the two columns operating at different pH values or temperatures. 相似文献
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The desalting property of ion-exchange resins in organic solvent is reported by using potassium acetate as a model compound. The experimental results show that the solvability of the solvent stirring speed, and temperature are the factors which influence the ion-exchange rate. The increase of solvability, stirring speed and temperature will speed up the ion-exchange process. 相似文献