用废干电池制备锰锌铁氧体的方法

该发明提供了一种用废干电池制备锰锌铁氧体的方法：用挤压法使干电池破碎，装入蒸汞炉中热蒸，去除有害杂质汞及有机物后用硫酸浸出，99％以上的汞可以从废料中挥发并被蒸汞炉中的吸收液吸收；浸出液用水解法、置换法及流化法除杂，浸除后的废渣进行安全填埋，除杂后的清液用碳酸盐中和，中和后得到的沉淀经干燥焙烧，即可制得锰锌铁氧体粉体。该法简便易行、费用省、效益高，可有效回收废干电池中各种有价元素，     

从废旧锌锰电池中回收锌和锰的工艺研究

废旧锌锰干电池经过剖开、焙烧处理,去除汞和碳粉,再用硫酸浸取,滤液采用沉淀法分离锌和锰.锌和锰的回收率分别为94.5%和93.6%.     

废旧锌锰电池及其回收过程中汞载体的研究

针对目前一些回收废旧锌锰电池工艺在汞回收处理上存在的问题,集中对废旧锌锰电池中汞的载体以及回收处理废旧锌锰电池过程中汞载体的变化进行了研究,为废旧锌锰电池回收处理中汞的完全回收提供了依据.     

从废旧锌锰电池中回收汞和铵的工艺研究

针对废旧锌锰电池中汞分散存在给回收处理废旧锌锰电池工作完全回收汞所带来的困难,利用汞和铵的性质特点,找到了从废旧锌锰电池中集中回收汞和铵的工艺条件,为废旧锌锰电池的资源化和防止二次污染创造了有利条件.     

利用废锌锰干电池制备纳米氧化锌粉体

废弃的锌锰干电池含有大量的有用元素，尤其是既做电池的负极又兼做容器的锌皮，在电池的电能消耗完后，仍有大量剩余。据相关资料介绍，每节干电池放电完毕后，仍有70％～75％的锌未参加反应，因此，有大量未反应的电解锌(纯度99．9％)残存于干电池中。我们以废锌锰干电池的锌皮为主要     

废干电池处理进展

指出了废干电池对人类和环境的危害及其回收利用的价值;介绍了国内外处理废干电池常用的技术方法;分析了我国在废干电池处理上存在技术落后、政府对市场管理欠缺、废干电池回收力度不足等问题;最后提出我国处理废干电池问题应朝着无害化、减量化和资源化三方面努力。     

专利资讯

<正>专利名称:一种废旧电池回收系统及其回收方法专利申请号:CN201310213322.X公开号:CN104183855A申请日:2013.05.28公开日:2014.12.03申请人:深圳市泰力废旧电池回收技术有限公司本发明公开了一种废旧电池回收系统及其回收方法,该系统和方法是将废旧干电池通过二次破碎,所得成分为碳粉、纸、薄膜、塑料、碳棒、铁、锌、铜,经烘干除汞后,送入振动筛,分离出碳粉,所余之成分送入下一设备的振动筛,同时在     

我国氯碱行业汞污染现状与防治对策

介绍了汞污染的来源、危害及治理现状,分析了氯碱行业的高汞触媒污染严重、汞流失环节多、含汞废触媒回收处理中存在污染隐患等汞污染问题,提出了减少氯碱行业汞消耗与汞污染的对策和措施.     

废无汞碱性电池极性材料制备锰锌铁氧体磁性纳米颗粒

以硝酸浸取废无汞碱性电池极性材料,再加入硝酸铁及蔗糖生成前驱体,最后通过焙烧制得锰锌铁氧体磁性纳米颗粒。优化了酸浸和焙烧条件,采用FTIR和DTA-TG技术研究了前驱体的形成和热解过程,采用XRD、FTIR、TEM技术和振动样品磁强计对锰锌铁氧体进行了表征。结果表明:废无汞碱性电池极性材料酸浸的最佳条件为H_2O_2加入量3%(w)、液固比10 mL/g、稀硝酸浓度4 mol/L、浸取温度40℃,该条件下浸取10 min锰和锌的浸出率均可达100%;所得前驱体为葡萄糖酸盐,其最佳焙烧条件为焙烧温度450℃、焙烧时间2 h;最佳条件下所得锰锌铁氧体为尖晶石型Mn_(0.5)Zn_(0.5)Fe_2O_4,其颗粒为球形、大小均匀,且磁性能优良。     

关于我国废干电池再生利用技术研究的几点思考

对我国废干电池再生利用技术研究提出了几点看法,认为我国废干电池再生利用技术既要注意环境无害化、资源化,还要考虑产业化和适应性问题,使我们的技术既有高的技术含量又符合我国国情.     

电厂建设运行中的水土流失预测与水土保持设计

在燃煤电厂建设运行的同时,将引起一系列的水土流失问题.以四川国电金堂电厂二期扩建工程为例,简要说明项目区水土流失预测的内容和方法,并在其基础上对可能产生的水土流失和危害进行了分析,同时介绍了建设期和运行期采取的综合防治措施,为类似工程的水土保持提供借鉴.     

磷对环境的污染及防治对策

我国水体富营养化严重，其主要控制因子是磷。在分析磷污染的污染状况，污染源的基础上，介绍了防治对策，采用低磷循环冷却水处理剂，减少磷排放，是防止工业磷污染的有效方法。     

Pyrolysis of virgin and waste polypropylene and its mixtures with waste polyethylene and polystyrene

A comparison of waste and virgin polypropylene (PP) plastics under slow pyrolysis conditions is presented. Moreover, mixtures of waste PP with wastes of polyethylene (PE) and polystyrene (PS) were pyrolyzed under the same operating conditions. Not only the impact of waste on degradation products but also impacts of the variations in the mixing ratio were investigated. The thermogravimetric weight loss curves and their derivatives of virgin and waste PP showed differences due to the impurities which are dirt and food residues. The liquid yield distribution concerning the aliphatic, mono-aromatic and poly-aromatic compounds varies as the ratio of PP waste increases in the waste plastic mixtures. In addition to this, the alkene/alkane ratio of gas products shows variations depending on the mixing ratio of wastes.     

北京市居民衣服消费处置及对其回收利用认识调查与分析

首先对北京市居民每年购买新衣服的数量、支出、穿着时间、淘汰原因,以及闲置衣服的处理方式、数量等进行了调查与分析,然后对北京市居民对旧衣物回收利用的认识、回收形式及其处理方式,对旧衣物如何处理回收、再利用的担忧,对希望旧衣物回收箱摆放的场所等进行了调查与分析。其研究结果对废旧纺织品回收体系建设、制度及政策制定具有一定的参考价值。     

Photo-oxidation and Photo-toxicity of Crude and Refined Oils

The fate and effects of an oil spill are effected by solar radiation through the action of photo-oxidation and photo-toxicity. Photo-oxidation, an important process in the weathering of oil, produces a variety of oxidized compounds, including aliphatic and aromatic ketones, aldehydes, carboxylic acids, fatty acids, esters, epoxides, sulfoxides, sulfones, phenols, anhydrides, quinones and aliphatic and aromatic alcohols. Some of these compounds contribute to the marine biota toxicity observed after an oil spill. Photo-toxicity occurs when uptake of certain petroleum compounds, e.g. certain polycyclic aromatic hydrocarbons and benzothiophenes, is followed by solar exposure which results in much greater toxicity than after dark uptake. The mechanism of PAH photo-toxicity includes absorbance of solar radiation by the PAH which produces a free radical and this free radical in turn reacts with oxygen to produce reactive oxygen species that can damage DNA and other cellular macromolecules. While most studies on photo-toxicity have been carried out in the laboratory, there are studies showing that water from an oil spill is photo-toxic to bivalve embryos for at least a few days after the spill. Other studies have found that oil contaminated sediments are photo-toxic to several marine invertebrates. More studies are required to determine if marine fauna at an oil spill site are effected by the action of photo-toxicity and photo-oxidation.     

Synthesis and Characterization of Polyols and Polyurethane Foams from PET Waste and Crude Glycerol

In this study, polyethylene terephthalate (PET) waste from post-consumer soft-drink bottles and crude glycerol from the biodiesel industry were used for the preparation of polyols and polyurethane foams. PET waste was firstly depolymerized by the glycolysis of diethylene glycol. The glycolyzed PET oligomers were then reacted with crude glycerol at different weight ratios to produce polyols via a series of reactions, such as esterification, transesterification, condensation, and polycondensation. The polyols were characterized by titration, viscometry, gel permeation chromatography (GPC), and differential scanning calorimetry. Subsequently, polyurethane (PU) foams were made via the reaction between the produced polyols and polymeric methylene-4,4′-diphenyl diisocyanate and were characterized by mechanical testing, scanning electron microscopy, and thermogravimetric analysis. Polyols from crude glycerol and their PU foams were also prepared to compare properties with those of polyols and PU foams from PET and crude glycerol. The influence of aromatic segments existing in glycolyzed PET and glycerol content on the properties of the polyols and PU foams was investigated. It was found that aromatic segments of polyols from glycolyzed PET helped increase their molecular weights and improve thermal stability of PU foams, while high glycerol content in polyols increased the hydroxyl number of polyols and the density and compressive strength of PU foams.     

Novel and innovative pyrolysis and gasification technologies for energy efficient and environmentally sound MSW disposal

Within the context of European Union (EU) energy policy and sustainibility in waste management, recent EU regulations demand energy efficient and environmentally sound disposal methods of Municipal Solid Waste (MSW). Currently, landfill with its many drawbacks is the preferred option in the EU and many other industrialised countries. Within the waste management hierarchy thermal disposal especially incineration is a viable and proven alternative. But, the dominating method, mass-burn grate incineration has drawbacks as well particularly hazardous emissions and harmful process residues. In recent years, pyrolysis and gasification technologies have emerged to address these issues and improve the energy output. To keep the many players in the field comprehensively informed and up-to-date, novel and innovative technology approaches emphasising European developments are reviewed.     

微生物絮凝剂及其在水处理中的应用

近年来对微生物絮凝剂的研究不断深入，新的高效菌种不断被发现。简要介绍了微生物絮凝剂的絮凝机理、分关、絮凝效果及影响因素，重点介绍了新型微生物絮凝剂在水处理中的应用。     

Laboratory Experiments and Estimation of Cumulative Infiltration and Sorptivity

Soil water cumulative infiltration affects the environment by controlling the irrigation rate and consequently the water and pollutants movement through the ground. In order to study the cumulative infiltration in a sandy soil sample, experiments were performed in the laboratory. The sample was placed uniformly in a transparent column with an inner diameter of 6 cm. A constant head boundary condition of a 2 mm height was applied on the surface of the sample and the cumulative volume of the incoming water was measured. Soil moisture at four locations of the column was measured, by using the TDR method in order to obtain the moisture profiles. By comparing the values of the infiltrated water volumes with those calculated by the integration of the moisture profiles, a good agreement was found out. Also the Parlange theoretical model fitted very well with the infiltration experimental points.