废聚苯乙烯泡沫塑料制取涂料及胶粘剂

阐述了利用废旧泡沫塑料研制和开发各种不同用途涂料的进展，研究了利用废聚苯乙烯泡沫塑料制取涂料的方法，讨论了该涂料的配方选择及性能指标。     

沉淀法回收聚苯乙烯泡沫塑料的工艺研究

研究沉淀法回收聚苯乙烯泡沫塑料(EPS)的工艺,利用石油裂解副产物为溶剂回收废旧聚苯乙烯泡沫塑料,以废治废,回收利用。溶剂低毒,对聚苯乙烯泡沫塑料溶解速度快,溶解量大,价廉易得。采用转式间歇投料并附加溶剂挥发分回收装置的工艺,溶剂回收率高,无二次污染,可循环使用。聚苯乙烯塑料(PS)回收率可达99%。     

沉淀法回收聚苯乙烯泡沫塑料的工艺研究

研究沉淀法回收聚苯乙烯泡沫塑料（EPS）的工艺，利用石油裂解副产物为溶剂回收废旧聚苯乙烯泡沫塑料，以废治废，回收利用。溶剂低毒，对聚苯乙烯泡沫塑料溶解速度快，溶解量大，价廉易得。采用转式间歇投料并附加溶剂挥发分z收装置的工艺，溶剂回收率高，无二次污染，可循环使用。聚苯乙烯塑料（PS）回收率可达99％。     

攻克白色污染取得新突破

中国科学院广州化学所与泰兴市民营企业金龙公司合作,研发成功利用CO2制备脂肪族聚碳酸亚乙酯和降解型聚氨酯泡沫塑料,并通过了国家环保总局的科技成果鉴定。该项目利用泰兴市丰富的CO2资源,生产出脂肪族聚碳酸亚乙酯材料,由此制成聚氨酯泡沫塑料,广泛应用于家电、家具、交通运输、石油化工管道、建筑等行业,可生物降解,对消除白色污染具有重要意义。该产品具有巨大的市场开发前景。     

用开孔泡沫塑料萃取酚的研究

用泡沫塑料从稀水溶液中萃取某些环境污染物,文献上已有过报导.在1971年的一篇美国专利中,Schlicht等研究了用聚醚型泡沫塑料和其它载体对酚的萃取.在他们的实验条件下,泡沫塑料从正庚烷溶液中萃取酚和甲酚的萃取率为50～80％,并随聚氨酯泡沫塑料中氮的含量不同而不同.Bowen1973年在一篇英国专利中报导,用五种不同类型的聚醚泡沫塑料从水溶液中萃取酚时,分配系数为46～416.被萃取物可以用丙酮洗脱. 泡沫塑料对某些有机物萃取性能的研     

生物浮岛治理水体富营养化

湖北大学资源与环境学院，利用白色泡沫塑料作为浮岛载体，将陆生喜水植物连根移植到载体内，浮岛在植物生长过程中，植物不仅吸收水中大量的氮、磷等营养物质，还能释放出抑制藻类生长的化合物，从而达到净化水质的目的。利用废物作生物浮岛，也是开辟水体农业的新途径。     

一种回收废聚苯乙烯（PS）泡沫塑料方法：蒸汽熔融挤压法的工艺分析

本文介绍了一种可在生产厂内回收废聚苯乙烯(PS)泡沫塑料的简单方法。该法将粉碎后的PS泡沫塑料颗粒装填在成型模具内,经蒸汽加热表面熔融后,外力挤压冷却成型。从而在基本不改变废物原料外型的情况下对其进行低能耗回收,获得性能与原产品较为接近的回收产品。文中对该法的原理、设备、操作工序及工艺条件等作了介绍和分析。     

无机抗菌剂在建筑涂料中的应用研究

研究了5种无机抗菌剂:锌型沸石抗菌剂、银型沸石抗菌剂、氧化锌晶须复合抗菌剂、纳米TiO2光催化抗菌剂和Ca10-x-yTixZny(PO4)6(OH)2复合抗菌剂在涂料中的应用。以对大肠杆菌(E.coli)的灭菌效果评价抗菌性能。结果表明:锌型抗菌涂料的抗菌效果较差,后4种类型抗菌涂料具有很好抗菌效果。但是,银型抗菌剂和氧化锌晶须复合抗菌剂在涂料中存在易引起涂料变色和难分散问题;纳米TiO2光催化型抗菌剂在涂料中易加快涂料老化;而Ca10-x-yTixZny(PO4)6(OH)2复合抗菌剂既具有良好的抗菌性能,又对涂料的基本性能没有影响,它能够应用到抗菌涂料中。     

清洁生产在印花行业中的实施

在印花生产过程中强化落实清洁生产的各项措施 ,健全并细化企业管理制度 ,采用低毒的环保型印花涂料 ,高浓度印花废水处理后回收利用。既实现了减污节水降成本的企业目标 ,也达到了社会效益、经济效益和环境效益相统一的宏观目标     

无机抗菌剂在建筑涂料中的应用研究

研究了5种无机抗菌剂：锌型沸石抗菌剂、银型沸石抗菌剂、氧化锌晶须复合抗菌剂、纳米TiO2光催化抗菌剂和Ca10-x-yTixZny（PO4）6（OH）2复合抗菌剂在涂料中的应用.以对大肠杆菌（E.coli）的灭菌效果评价抗菌性能.结果表明：锌型抗菌涂料的抗菌效果较差,后4种类型抗菌涂料具有很好抗菌效果.但是,银型抗菌剂和氧化锌晶须复合抗菌剂在涂料中存在易引起涂料变色和难分散问题;纳米TiO2光催化型抗菌剂在涂料中易加快涂料老化;而Ca10-x-yTixZny（PO4）6（OH）2复合抗菌剂既具有良好的抗菌性能,又对涂料的基本性能没有影响,它能够应用到抗菌涂料中.     

Plastic waste as a valuable resource: strategy to remove heavy metals from wastewater in bench scale application

Environmental Science and Pollution Research - Single-use plastic waste is gradually considered a potential material for circular economy. Ion exchange resin obtained from polystyrene waste by...     

废棉布制备活性炭影响因素与机理研究

研究了采用磷酸活化法制备废棉布活性炭的工艺条件。研究表明,废棉布活性炭吸附能力随着磷酸浓度、浸渍时间、活化温度和活化时间的增加呈现先增加后减小的趋势。最佳制备条件为:磷酸浓度40%,浸渍时间24 h,活化温度500℃,活化时间30 min。此时制备的废棉布活性炭性能优于商品活性炭。另外,通过对最佳浓度磷酸浸渍的废棉布进行热失重分析,对磷酸活化废棉布制备活性炭机理开展了初步研究,研究表明磷酸活化废棉布制备活性炭过程分为水分蒸发阶段、炭化阶段、过渡阶段、活化阶段和煅烧阶段。     

Polycyclic aromatic hydrocarbons in solid residues from waste incineration

Polycyclic aromatic hydrocarbons (PAH) levels in solid residues from clinical waste incineration were measured using HPLC with fluorescence detection. PAH mass emission rates and emission rates as a function of waste burned are also reported. For bottom ash, PAH levels and physical properties were found to be quite consistent. Levels of high molecular mass PAHs were comparable to levels previously reported in the literature when adjusted for differences in sample preparation techniques. However, levels of low molecular mass PAHs were considerably elevated in this study. Possible reasons for this finding include the composition of the waste, combustion conditions and methods of sample preparation. In contrast, no PAHs were found in fly ash, an unexpected finding which is probably attributable to matrix effects resulting from a surfeit of lime in the fly ash. Factors effecting the partitioning of PAHs and their environmental fate are also discussed.     

Acoustic barriers obtained from industrial wastes

Acoustic pollution is an environmental problem that is becoming increasingly more important in our society. Likewise, the accumulation of generated waste and the need for waste management are also becoming more and more pressing. In this study we describe a new material--called PROUSO--obtained from industrial wastes. PROUSO has a variety of commercial and engineering, as well as building, applications. The main raw materials used for this environmentally friendly material come from slag from the aluminium recycling process, dust from the marble industry, foundry sands, and recycled expanded polystyrene from recycled packaging. Some natural materials, such as plastic clays, are also used. To obtain PROUSO we used a conventional ceramic process, forming new mineral phases and incorporating polluted elements into the structure. Its physical properties make PROUSO an excellent acoustic and thermal insulation material. It absorbs 95% of the sound in the frequency band of the 500 Hz. Its compressive strength makes it ideal for use in ceramic wall building.     

CuCl2蚀刻液制备CuCl的研究

以氯化钢蚀刻液废液、粗铜粉等为原料,在常温下反应制备氯化亚铜,工艺简便,产品质量好,具有显著的经济效益和环境效益。     

Novel low density granular adsorbents - properties of a composite matrix from zeolitisation of vermiculite

This paper reports the preparation and properties of a new low density granular absorbent material based on a zeolite/vermiculite composite. The composite prepared addresses a number of important issues relating to the use of zeolites in environmental and waste management applications. The material prepared has large particle size due to binderless adhesion of zeolite crystals within the protective lamellar matrix provided by the vermiculite granule. Additionally, the porous nature of new material ensures that it outperforms natural zeolite grains in ion-exchange tests. The material was shown to have a low bulk density (0.75 g cm(-3)) adding the benefit that the majority of grains float on water for over 15 h. The conclusion of the study is that the use of composite matrices enable the preparation of materials which show the physical properties of the host, (e.g., granular and low density), whilst maintaining the powder-like properties (e.g., high ion-exchange and small crystal size) of the active component. The resulting material can be easily handled and separated from aqueous waste streams using either flotation or exploiting its granular nature.     

Utilization of agricultural waste corn cob for the preparation of carbon adsorbent

In the present study, a series of activated carbons were prepared from agricultural waste corn cob by chemical and physical activations with potassium hydroxide (KOH)/potassium carbonate (K2CO3) and carbon dioxide (CO2). The effect of process variables such as impregnation ratio, impregnation time, activation temperature and soaking time of CO2 was studied in order to relate these preparation parameters with the physical properties of final carbon products. The resulting activated carbons were characterized by nitrogen adsorption-desorption isotherms at 77 K. The surface areas and pore volumes of carbons were estimated by the BET equation, the Langmuir equation and the t-plot method. Under the experimental conditions investigated, the main parameters in the activation of corn cob were found to be the impregnation ratio and activation temperature. The soaking time of CO2 is another important variable, which had a strong effect on the pore volume development. The BET surface area and total pore volume were as large as about 2000 m2/g and about 1.0 cm3/g, respectively. This study showed that the activation of agricultural waste corn cob with KOH/K2CO3 and CO2 was suitable for the preparation of large-surface-area activated carbons.