络合萃取法处理含酚废水技术

本文介绍了络合萃取法处理含酚废水的研究工作。实验研究及工业实施的结果表明,所建立的工业含酚废水络合萃取工艺是可行的、有特色的。采取这一技术,可以通过单一萃取操作使废水含酚量低于国家排放标准,创造直接的社会效益和经济效益。     

我国含酚废水处理技术的应用近况

简要地总结了国国内几种处理含酚废水的物理部法，并进行了比较，可以看出含酚废水处理在萃取法及液膜法方面有了突破性进展，同时建立我国石化行业借鉴先进方法治理废水，得于环境保护。     

乳状液膜法处理鲁奇气化含酚废水的研究

采用乳状液膜法处理鲁奇炉煤气化废水,通过单因素实验,研究了表面活性剂用量、制乳转速、NaOH浓度、乳水比对乳状液膜法处理废水效果的影响。实验还比较了乳状液膜法与二异丙醚、甲基异丁基甲酮两种溶剂萃取法的处理效果。结果表明,表面活性剂用量、制乳转速、NaOH质量分数、乳水比的最优条件分别是4%、5 000r/min、4%、1:1.5。乳状液膜法在脱酚效率上高于以二异丙醚和甲基异丁基甲酮为溶剂的液液萃取,但处理后废水COD较高。     

BPP生产中含酚废水的处理

研究了用活性炭吸附法处理ＢＰＰ生产中的含酚废水,讨论了不同的活性炭,ＰＨ值等对吸附性能的影响。结果表明,该工艺处理效果好,处理后的放心水无色透明,ＣＯＤＣＲ、挥发酚、ＰＨ均达国家污水综合排放标准。     

含酚废水的处理进展

介绍了含酚废水的处理现状及处理方法,着重分析了Fenton法处理含酚废水的影响因素。     

络合萃取法处理高浓度含酚废水的研究

采用我院自行研制的新型高效萃取剂－－HLE处理水杨酸工业废水,一级萃取率＞99．5％,反萃率＞99％,分配比达100以上。     

含酚废水的处理与酚的回收研究

介绍了含酚废水与聚乙烯基吡啶类树脂接触，酚类会吸附在树脂上，使废水得到净化，然后将吸附了酚类的树脂加热处理回收酚，与此同时，对树脂也进行了再生处理，再生后的树脂可循环使用。     

陶瓷业含酚废水的处理与酚的回收研究

采用先加入氢氧化钠反应,再进行蒸馏的方法,对陶瓷业含酚废水进行了处理及酚类物质回收的研究.探讨了氢氧化钠用量、搅拌时间以及蒸出液的体积对酚类物质去除和回收的影响.实验结果表明:对于25 mL的陶瓷业废水,氢氧化钠用量为0.9 g,搅拌10 min,蒸出液体积为15 mL,脱酚率高达96.44％,酚类物质回收率为95.12％.同时进行放大实验,脱酚率可达96.15％,酚类物质回收率仍高达94.96％,说明该方法处理陶瓷业水煤气废水的效果良好.     

含酚废水中酚分离技术研究

酚类物质是工业废水中常见高毒性、难降解的有机污染物,同时,它又是化工生产中重要的原料之一,本文介绍现阶段含酚废水中酚分离的方法———萃取法、吸附法、蒸汽法和过滤法等,阐述了近年来分离方法以及技术进展情况,并对近年来的吸附剂、萃取剂等做出介绍,提出了当前含酚废水中酚分离技术的发展前景和方向,希望可以为我国的环保事业做出一点贡献。     

改性膨润土处理含酚废水的研究

对十六烷基三甲基溴化铵(CTAB)改性膨润土处理含酚废水进行了研究.通过实验考察了吸附温度、吸附时间、废水的pH和改性膨润土加入量对废水中酚去除率的影响.实验结果表明,改性膨润土处理含酚废水的其最佳工艺条件为:吸附温度为25 ℃、吸附时间为60 min、废水的pH为5、改性膨润土加入量为2.5 g.在此条件下可使50 mL模拟含酚废水中酚浓度由1 000 mg/L降到77.9mg/L,酚去除率达92.21％.     

Transfer of Phenolic Compounds from Olive Mill Wastewater to Olive Cake Oil

The transfer of the phenolic compounds from olive mill wastewater (OMW) to oil extracted under microwave from olive cake (OC) was carried out by using the following operations: mixing of the olive mill wastewater with the olive cake, drying of the mixture and recovery by solvent of the olive cake oil enriched by phenolic compounds. In the first part of this work, we made a screening design using a Hadamard matrix to quickly locate the factors influencing the process. Among five potentially influential parameters, we found that only three were actually active (OMW/OC ratio noted R, mixing velocity of mixture Vm and mixing time Tm). In the second part, fractional factorial design (2^5?1) was performed to evaluate the effects of five variables (three of them being selected by screening with exposition time Te and radiation power P) and their eventual interactions. The p value (p < 0.05) indicated that R, P,Te, Vm and Tm had significant effects on the response followed by the interaction effects between R‐P, P‐Te, R‐Vm, Te‐Vm, Te‐Tm, and Vm‐Tm. Under optimal conditions, the addition of OMW to OC increased the phenolic compounds content in the oil from 0.04 ± 0.01 to 0.13 ± 0.02 g/L.     

酚醛树脂废水的工业化处理

用延时缩合—水解（酸化）好氧生物处理酚醛树脂废水实践研究表明,通过优化后的延时缩合,用草酸做催化计,COD-cr去除率达98%,酚、醛去除率达99.9%,可以直接经水解（酸化）好氧生物法处理后达标入管网。     

用溶剂萃取法从ITO膜蚀刻废液中回收金属铟的实验研究

文章对ITO膜蚀刻废液中锱的回收进行了研究。首先采用TBP萃取蚀刻废液,在实验的最优条件下经两次萃取,钢的萃取率可达到96.2％。然后用水反萃TBP有机相,不仅反萃了金属铟,并实现了铟、锡分离。使用P2O4对反萃液萃取及盐酸反萃富集,所得的富钢溶液由NaOH调节pH,用铝片置换,成功回收海绵钢。     

含酚废水治理技术研究现状及其进展

综述了含酚废水的治理研究现状。分析了溶剂萃取法、吸附法、高级氧化技术、生化处理技术、膜分离技术、焚烧法的特点和存在的问题及应用前景。并探讨了含酚废水治理技术的发展趋势     

超声协同其它技术处理含酚废水

超声降解法水处理技术是一种很有发展前途的新兴有机废水处理技术。介绍了超声波技术处理难降解含酚废水的工作原理,以及近几年来超声协同其它技术物理方法(活性炭吸附法、液膜法)、化学方法(电化学法、光化学方法、深度氧化法)以及生物方法(活性污泥法、酶处理法)降解含酚废水的最新研究成果与结论,对其中存在的一些问题进行了讨论,并指出今后的重点研究方向。     

Recovery and Removal of Phenolic Compounds from Olive Mill Wastewater

Food wastes are today considered as a cheap source of valuable components since the existent technologies allow the recovery of target compounds and their recycling inside the food chain as functional additives in different products. Olive mill wastewater (OMW) is generated from olive oil extraction systems. It has high added-value compounds namely phenolics, recalcitrants, pectin, and some important enzymes. It causes a certain amount of toxicity/phytotoxicity because of its phenolic compounds. OMW also has significant impacts when discharged directly into surface waters. Therefore, the treatment of olive mill wastewater is very much needed. Several types of techniques have been investigated for OMW treatment along with recovery and removal of its phenolic compounds. Among these techniques, physical ones are utilized for extraction purposes, while chemical and biological methods are applied in order to diminish organic load. In this review, current status and recent developments in the recovery and removal of phenolic compounds from OMW have been critically examined.     

Recovery of Boric Acid from Wastewater by Solvent Extraction

Abstract

An extraction system for the recovery of boric acid using 2-butyl-2-ethyl-1,3-propanediol (BEPD) as an extractant was studied. Loss of the extractant to the aqueous solution was lowered by using 2-ethylhexanol as a diluent. The extraction equilibrium of boric acid with BEPD was clarified, and the equilibrium constants for various diluents were determined. Furthermore, continuous operation for the recovery of boric acid using mixer-settlers for extraction and stripping was successfully conducted during 100 hours.     

煤焦油在含酚废水治理上的应用

综述了含酚废水治理技术研究现状,特别是溶剂萃取技术的应用现状及发展趋势。介绍了一种新型溶剂萃取剂——煤焦油中油,分析其组成、理化性质及脱酚机理。同时,展望了中油萃取剂在含酚废水治理上的应用前景。     

磷酸三丁酯络合萃取含酚废水的应用研究

利用磷酸三丁酯、三烷基胺为络合剂,分别采用苯、甲苯、正辛醇、煤油作为稀释剂对含酚废水进行络合萃取.实验结果表明,采用磷酸三丁酯一甲苯混合溶剂对含酚废水进行萃取具有相当高的分配系数;同时探讨了络合萃取技术处理含酚废水工业化的可行性,实验结果表明具有工业化应用前景.