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Conservation & Recycling最新文献

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A model recovery process for scrap polystyrene foam by means of solvent systems 采用溶剂系统回收废旧聚苯乙烯泡沫塑料的工艺模型
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90062-2
E.M. Kampouris, C.D. Papaspyrides, C.N. Lekakou
{"title":"A model recovery process for scrap polystyrene foam by means of solvent systems","authors":"E.M. Kampouris,&nbsp;C.D. Papaspyrides,&nbsp;C.N. Lekakou","doi":"10.1016/0361-3658(87)90062-2","DOIUrl":"10.1016/0361-3658(87)90062-2","url":null,"abstract":"<div><p>A solvent technique is studied for the recovery of polystyrene (PS) foam waste. The model process proposed ensures removal of any impurities present and comprises dissolution of the starting material, filtering, reprecipitation, thorough washing of the polymer grains obtained and drying. The solvent mixtures involved are separated by distillation for re-use. The following criteria are considered: (a) the rheological behaviour of the PS solutions prepared, (b) the yield of the process of polymer of acceptable grain size and (c) sufficient solvent/non-solvent separation. On the basis of these criteria, methyl ethyl ketone/<em>n</em>-hexane or methanol and <em>p</em>-xylene/<em>n</em>-heptane are suggested as effective solvent/non-solvent systems.</p></div>","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90062-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73571616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 34
Utilization of waste concrete for new construction 废弃混凝土在新建工程中的利用
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90127-5
R. Sri Ravindrarajah
{"title":"Utilization of waste concrete for new construction","authors":"R. Sri Ravindrarajah","doi":"10.1016/0361-3658(87)90127-5","DOIUrl":"10.1016/0361-3658(87)90127-5","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90127-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72749712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
An efficient recovery of gold and other noble metals from electronic and other scraps 从电子和其它废料中有效地回收金和其它贵金属
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90055-5
Hidetoshi Baba
{"title":"An efficient recovery of gold and other noble metals from electronic and other scraps","authors":"Hidetoshi Baba","doi":"10.1016/0361-3658(87)90055-5","DOIUrl":"10.1016/0361-3658(87)90055-5","url":null,"abstract":"<div><p>Pure gold is extracted from crude gold by the solvent extraction method in the recovery and refining process for Noble metals recovered from electronic and other scraps. This solvent extraction method is advantageous in that it facilitates rapid processing, thereby reducing the interest burden of gold staying too long in the unit. Therefore, the method is also used in the refining of platinum and palladium. Technological innovation has created more complex and diversified types of scraps, and efforts are being made to accommodate ourselves to such a trend.</p></div>","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90055-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87752021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Pollution effects of fertilizer factory effluent on growth and development of corn and rice seedlings 化肥厂污水污染对玉米和水稻幼苗生长发育的影响
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90005-1
L.C. Mishra, K.K. Singh
{"title":"Pollution effects of fertilizer factory effluent on growth and development of corn and rice seedlings","authors":"L.C. Mishra,&nbsp;K.K. Singh","doi":"10.1016/0361-3658(87)90005-1","DOIUrl":"https://doi.org/10.1016/0361-3658(87)90005-1","url":null,"abstract":"<div><p>Laboratory experiments were conducted to study the impact of various concentrations of fertilizer factory effluent on the germination and growth of corn and rice seedlings. The effluent was found to be rich in various solids, biochemical oxygen demand (13013), N<sup>+</sup>, Ca<sup>2+</sup>, Na<sup>+</sup>, Cl<sup>−</sup>, Co<sub>3</sub><sup>2−</sup> and HCO<sub>3</sub><sup>−</sup>, deficient in dissolved oxygen and highly alkaline in nature.</p><p>Effluent at low concentrations of 2.5 and 5% (v/v) had no significant effect on seed germination but enhanced the growth and development of seedlings of both test crops. Higher concentrations of effluent, however, reduced seed viability and percentage germination and caused deleterious effects on growth and development.</p><p>The greening of the coleoptile was delayed at higher effluent concentrations. The concentrations of Na<sup>+</sup>, Ca<sup>2+</sup>, Na<sup>+</sup> and Cl<sup>−</sup> in the shoot and root systems of control seedlings of corn and rice were similar whereas in effluent-treated seedlings, a relatively high amount of Na<sup>+</sup> and low amount of Cl<sup>−</sup> was found in the roots as compared to the shoots, but the amount of Ca<sup>2+</sup> was similar in both.</p></div>","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90005-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91609041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Copper recovery from secondary materials in the shaft furnace with used automibile-tire additions 用废汽车轮胎添加剂从竖炉二次料中回收铜
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90130-5
Edin Čustović, Günter Fleischer, Roland Kammel, Uwe Lembke
{"title":"Copper recovery from secondary materials in the shaft furnace with used automibile-tire additions","authors":"Edin Čustović,&nbsp;Günter Fleischer,&nbsp;Roland Kammel,&nbsp;Uwe Lembke","doi":"10.1016/0361-3658(87)90130-5","DOIUrl":"10.1016/0361-3658(87)90130-5","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90130-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79087584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A recovery and reuse system for fatty oils from by-products and waste materials of vegetable fatty oil production 一种植物油生产副产物和废料中油脂的回收再利用系统
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90058-0
Moritsugu Daido
{"title":"A recovery and reuse system for fatty oils from by-products and waste materials of vegetable fatty oil production","authors":"Moritsugu Daido","doi":"10.1016/0361-3658(87)90058-0","DOIUrl":"10.1016/0361-3658(87)90058-0","url":null,"abstract":"<div><p>Toei Chemical Co., Ltd. is one of the enterprises that systematically utilises by-products and industrial wastes. Only a few such enterprises are found in Japan. In our company, the crude fatty acids are recovered from the alkali foots (residual phospholipids) which are generated during the refining process for vegetable fats and oils. Moreover, the crude fatty acids are distilled for production of the soybean fatty acids, rapeseed fatty acids, and so forth. In the case of fractional distillation, simple fatty acids are produced. Also, our company has established a system for recovering vegetable fats and oils from the spent clay generated during the above-mentioned refining process. The system is so reliable that the quality of the vegetable fats and oils complies with JAS standards.</p></div>","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90058-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91011778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
8606750 Catalyst recovery process 8606750催化剂回收过程
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90080-4
{"title":"8606750 Catalyst recovery process","authors":"","doi":"10.1016/0361-3658(87)90080-4","DOIUrl":"https://doi.org/10.1016/0361-3658(87)90080-4","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90080-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138241164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
8606646 Recovery of mixed acids from mixed salts 8606646从混合盐中回收混合酸
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90078-6
{"title":"8606646 Recovery of mixed acids from mixed salts","authors":"","doi":"10.1016/0361-3658(87)90078-6","DOIUrl":"https://doi.org/10.1016/0361-3658(87)90078-6","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90078-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138241166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
8704638 Filter, in particular for a paint recycling installation 8704638过滤器，特别用于油漆回收装置
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90118-4
{"title":"8704638 Filter, in particular for a paint recycling installation","authors":"","doi":"10.1016/0361-3658(87)90118-4","DOIUrl":"https://doi.org/10.1016/0361-3658(87)90118-4","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90118-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138259084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
4673492 Gold recovery apparatus 4673492黄金回收装置
Conservation & Recycling Pub Date : 1987-01-01 DOI: 10.1016/0361-3658(87)90102-0
{"title":"4673492 Gold recovery apparatus","authors":"","doi":"10.1016/0361-3658(87)90102-0","DOIUrl":"https://doi.org/10.1016/0361-3658(87)90102-0","url":null,"abstract":"","PeriodicalId":100327,"journal":{"name":"Conservation & Recycling","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0361-3658(87)90102-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138259153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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