This study examined emissions of unintentionally produced persistent organic pollutants (POPs) from fabric filters in aluminum alloy smelting plants. The results are expected to indicate means of reducing these emissions from sources, such as metal smelting furnaces, where emission control by existing exhaust gas treatments is insufficient. Measurement of dioxins and polychlorinated biphenyl (PCB) concentrations in fabric filters revealed their formation at around 100℃, at which temperatures these by-products were presumed to be formed only slightly. In laboratory experiments using fly ash collected from fabric filters, formation was confirmed below 100℃ by long-term heating of more than 18 hr or preheating above the set temperature. This heating was regarded as necessary for reactivation of the catalysts in fly ash. Comparison of fly ash samples collected from three plants elucidated that water-soluble chlorides such as potassium chloride were the principal source of chlorine during formation at low temperatures. This comparison led to the inference that water spraying of flue gas is effective for reducing dioxins and PCB emissions from aluminum alloy smelting plants.
{"title":"Emission Control of Unintentionally Produced POPs at Low Temperature in Aluminum Alloy Smelting Plants","authors":"T. Hatanaka","doi":"10.3985/jjsmcwm.33.30","DOIUrl":"https://doi.org/10.3985/jjsmcwm.33.30","url":null,"abstract":"This study examined emissions of unintentionally produced persistent organic pollutants (POPs) from fabric filters in aluminum alloy smelting plants. The results are expected to indicate means of reducing these emissions from sources, such as metal smelting furnaces, where emission control by existing exhaust gas treatments is insufficient. Measurement of dioxins and polychlorinated biphenyl (PCB) concentrations in fabric filters revealed their formation at around 100℃, at which temperatures these by-products were presumed to be formed only slightly. In laboratory experiments using fly ash collected from fabric filters, formation was confirmed below 100℃ by long-term heating of more than 18 hr or preheating above the set temperature. This heating was regarded as necessary for reactivation of the catalysts in fly ash. Comparison of fly ash samples collected from three plants elucidated that water-soluble chlorides such as potassium chloride were the principal source of chlorine during formation at low temperatures. This comparison led to the inference that water spraying of flue gas is effective for reducing dioxins and PCB emissions from aluminum alloy smelting plants.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130363357","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}
Material recycling is a meaningful way to reduce environmental impacts and costs simultaneously. Mitsubishi Electric Corporation has realized “closed-loop recycling from household appliances to household appliances” in which polypropylene (PP), polystyrene (PS) and acrylonitrile-butadiene-styrene (ABS) are collected from a mixture of residual plastics contained in discarded household appliances and sorted for recycling. In this research, the dark-colored recycled PP and the light-colored recycled PP were separated from the mixed-colored recycled PP using a color sorter, and the recycled PP was polished using a plastic polisher to remove surface contamination. As the number of surface polishings of the recycled PP increased, the heat life became longer, so a clear correlation was seen between the heat life and the amount of contamination. From the relationship between the amount of residual copper in the recycled PP and the heat life, it is necessary to set the amount of residual copper in light-colored recycled PP to less than 3 ppm in order to obtain a heat resistance comparable to that of virgin PP without adding a metal deactivator.
{"title":"Study on a Method of Contamination Removal for Recycled PP Sorted from Discarded Household Appliances and the Identification of Materials that Accelerated Thermal Oxidation Degradation","authors":"Y. Matsuo","doi":"10.3985/jjsmcwm.31.65","DOIUrl":"https://doi.org/10.3985/jjsmcwm.31.65","url":null,"abstract":"Material recycling is a meaningful way to reduce environmental impacts and costs simultaneously. Mitsubishi Electric Corporation has realized “closed-loop recycling from household appliances to household appliances” in which polypropylene (PP), polystyrene (PS) and acrylonitrile-butadiene-styrene (ABS) are collected from a mixture of residual plastics contained in discarded household appliances and sorted for recycling. In this research, the dark-colored recycled PP and the light-colored recycled PP were separated from the mixed-colored recycled PP using a color sorter, and the recycled PP was polished using a plastic polisher to remove surface contamination. As the number of surface polishings of the recycled PP increased, the heat life became longer, so a clear correlation was seen between the heat life and the amount of contamination. From the relationship between the amount of residual copper in the recycled PP and the heat life, it is necessary to set the amount of residual copper in light-colored recycled PP to less than 3 ppm in order to obtain a heat resistance comparable to that of virgin PP without adding a metal deactivator.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125538812","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}
{"title":"Oxidative Decomposition and Mineralization of Refractory Pharmaceutical Products using Persulfate","authors":"R. Uchida, M. Kubota, H. Matsuda, N. Uemura","doi":"10.3985/JJSMCWM.1130301","DOIUrl":"https://doi.org/10.3985/JJSMCWM.1130301","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125845254","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}
{"title":"Production of Food Resources through the Enzyme Agent Treatment of Scallop Waste","authors":"T. Obara, Momoko Takahashi","doi":"10.3985/JJSMCWM.27.196","DOIUrl":"https://doi.org/10.3985/JJSMCWM.27.196","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121685929","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}
R. Yanase, O. Hirata, Y. Matsufuji, K. Oyamada, S. Ishida
{"title":"Landfill Stabilization Decision Tools with Leachate Quality and Temperature","authors":"R. Yanase, O. Hirata, Y. Matsufuji, K. Oyamada, S. Ishida","doi":"10.3985/JJSMCWM.22.298","DOIUrl":"https://doi.org/10.3985/JJSMCWM.22.298","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126143922","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}
{"title":"Material Recycling Technologies for Mixed Residual Plastics from Waste Household Appliances","authors":"Y. Matsuo, Yasuhiro Endo, A. Fujita, S. Ogasawara, Y. Iseki, Y. Hasebe","doi":"10.3985/JJSMCWM.20.303","DOIUrl":"https://doi.org/10.3985/JJSMCWM.20.303","url":null,"abstract":"特定家庭用機器再商品化法 (家電リサイクル法) の施行により，家電4品目 (冷蔵庫，洗濯機，エアコン，テレビ) に再商品化率が義務付けられ，その再商品化率の向上には，プラスチックのマテリアルリサイクルは重要な技術である。これまで，プラスチックマテリアルリサイクルの推進を目的に，家電リサイクルプラントに回収した手解体可能な部品 (冷蔵庫・野菜ケース，洗濯機・水槽) を用いて，新材相当の物性まで回復させ，家電製品に適用してきた。本研究では，手解体の困難なプラスチック部品であり，埋立あるいは焼却処分されてきた“使用済み家電混合プラスチック”から選別回収したポリプロピレン (PP) リサイクル材の機械的特性および異物量を評価した結果，PPリサイクル材はPP純度99.8%以上で，新材相当の機械的物性値および物性バラツキ (変動係数) を有し，家電製品に適用可能な材料であった。また，PPリサイクル材は，金属成分が微量残留しており，新材相当の耐熱性を得るためには，金属不活性剤の添加が不可欠であった。","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122982755","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}
{"title":"Preparation of a Hot-melt Adhesive from Expanded Polyurethane Waste and Evaluation of its Adhesion Properties","authors":"K. Makabe, Michinori Karikomi, Takao Kimura","doi":"10.3985/JJSMCWM.1111102","DOIUrl":"https://doi.org/10.3985/JJSMCWM.1111102","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"31 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114036583","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}
The Ministry of Environment Notification has defined no analytical method for recycled material resources. However, because an appropriate resource evaluation system is necessary, we compared the contents of WEEE and molten metal found using several methods. The methods included matte fusion, which is used for the evaluation of resources in the field of nonferrous metal smelting, and chemical analysis using test methods outlined in Notification No. 19 of the Ministry of the Environment, provisional analytical methods for precious and rare metals in electric and electronic products (“provisional analysis method”). The content values obtained using the test methods in Notification No. 19 were lower than those obtained using the other method, but the provisional analysis method seems to be suitable for use as a screening test. Although the reproducibility of analysis using the provisional analysis method was lower than that of the matte fusion method, both methods provided comparable content values. Matte fusion is difficult to imple-ment except by the refining industry. For various and diverse metals, provisional analysis is useful by environmental laboratories operated by local governments. Therefore, the provisional analysis method is expected to be used by local governments for analyses conducted in the resource recycling field.
{"title":"Metal Resource Analytical Methods for Environment and Smelting Fields: —Test Methods in Notification No.19 of the Ministry of the Environment, Provisional Analytical Methods for Precious and Rare Metals in Electric and Electronic Products, and Matte Fusion Method—@@@――環告19号試験,レアメタル等暫定分析法,マット融解法――","authors":"S. Iino, S. Mogi, Kentaro Miyawaki","doi":"10.3985/JJSMCWM.27.176","DOIUrl":"https://doi.org/10.3985/JJSMCWM.27.176","url":null,"abstract":"The Ministry of Environment Notification has defined no analytical method for recycled material resources. However, because an appropriate resource evaluation system is necessary, we compared the contents of WEEE and molten metal found using several methods. The methods included matte fusion, which is used for the evaluation of resources in the field of nonferrous metal smelting, and chemical analysis using test methods outlined in Notification No. 19 of the Ministry of the Environment, provisional analytical methods for precious and rare metals in electric and electronic products (“provisional analysis method”). The content values obtained using the test methods in Notification No. 19 were lower than those obtained using the other method, but the provisional analysis method seems to be suitable for use as a screening test. Although the reproducibility of analysis using the provisional analysis method was lower than that of the matte fusion method, both methods provided comparable content values. Matte fusion is difficult to imple-ment except by the refining industry. For various and diverse metals, provisional analysis is useful by environmental laboratories operated by local governments. Therefore, the provisional analysis method is expected to be used by local governments for analyses conducted in the resource recycling field.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124021766","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}
{"title":"Influencing Factors on Household Waste Generation in Local Towns","authors":"T. Sekito, Y. Dote, T. Yoshitake","doi":"10.3985/JJSMCWM.22.243","DOIUrl":"https://doi.org/10.3985/JJSMCWM.22.243","url":null,"abstract":"本研究では，ごみ排出原単位の大きく異なる宮崎県の2つの小都市を対象にフィールド調査を行い，ごみ発生抑制に対する行動や，可燃ごみ組成，ごみ袋重量を調査し，ごみ発生量に影響を与える要因について検討を行った。生活系ごみの中でも大きな割合を占める可燃ごみを中心に調査を行ったところ，自家処理実施割合や可燃ごみ袋あたりの重量，排出個数が異なることがわかった。調査結果をもとにした可燃ごみ排出原単位は両町で異なった。可燃ごみ排出原単位を外的基準とした数量化理論I類を用いた解析では，自家処理の影響が両町で異なることが示され，特に庭ごみの自家処理が可燃ごみ排出原単位の差に寄与していることがわかった。以上より，ごみの排出抑制のためには地方小都市の特徴を生かして，庭などがある家では家庭菜園を行い生ごみを堆肥として用いる等，積極的に自家処理を進めることが効果的である。","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124067075","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}
We devised a new pretreatment to analyze asbestos in gypsum boards that are discarded when building new structures and demolishing old ones. In this pretreatment, crushed gypsum board powder is dissolved in a water solution of ammonium formate. Then, insoluble asbestos can be separated on filter paper for XRD analysis. This pretreatment is simpler than the determination of asbestos in building material products (JIS A 1481), and XRD analysis can confirm chrysotile of 0 . 1 wt% or greater in gypsum. This method can only be applied for the analysis of gypsum, but it can be used effectively for confirming asbestos in amounts of 0 . 1 wt% or greater in the gypsum for the purpose of avoiding asbestos in it.
我们设计了一种新的预处理方法来分析在新建和拆除旧建筑时丢弃的石膏板中的石棉。在这种预处理中，粉碎的石膏板粉末溶解在甲酸铵水溶液中。然后将不溶性石棉用滤纸分离，进行XRD分析。该预处理方法比测定建筑材料制品中石棉(JIS A 1481)简单，XRD分析证实温石棉为0。1 wt%或更大的石膏。本方法仅适用于石膏的分析，但可有效地用于确定0。在石膏中添加1wt %或更大，以避免其中含有石棉。
{"title":"A Simplified Pretreatment for the Detection of Asbestos in Waste Gypsum","authors":"Harada Mihoko, Morio Hiura","doi":"10.3985/JJSMCWM.2120703","DOIUrl":"https://doi.org/10.3985/JJSMCWM.2120703","url":null,"abstract":"We devised a new pretreatment to analyze asbestos in gypsum boards that are discarded when building new structures and demolishing old ones. In this pretreatment, crushed gypsum board powder is dissolved in a water solution of ammonium formate. Then, insoluble asbestos can be separated on filter paper for XRD analysis. This pretreatment is simpler than the determination of asbestos in building material products (JIS A 1481), and XRD analysis can confirm chrysotile of 0 . 1 wt% or greater in gypsum. This method can only be applied for the analysis of gypsum, but it can be used effectively for confirming asbestos in amounts of 0 . 1 wt% or greater in the gypsum for the purpose of avoiding asbestos in it.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129258309","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：