Resources Processing最新文献_第8页

Hydraulic Activity and Synthetic Characteristics of Precipitated Calcium Carbonate according to Geological Properties of Limestone 从石灰岩地质性质看沉淀碳酸钙的水力活性及合成特性

Resources Processing Pub Date : 2014-01-01 DOI: 10.4144/RPSJ.61.26

Ye-Jin Yang, Jung-Ah Kim, Seong-Young Nam, Jin Kim, Ji-Whan Ahn

引用次数: 3

Rare Metals and Possibility for Recycling 稀有金属及其回收利用的可能性

Resources Processing Pub Date : 2014-01-01 DOI: 10.4144/RPSJ.61.83

S. Nishimura, J. Shibata, M. Sano

引用次数: 0

Sulfuric Acid Leaching Behavior of Nickel, Cobalt and Aluminum from Alkaline Leaching Residue of Spent Hydrodesulphurization Catalysts 废加氢脱硫催化剂碱浸渣中镍、钴和铝的硫酸浸出行为

Resources Processing Pub Date : 2014-01-01 DOI: 10.4144/RPSJ.61.170

K. Manabe, A. Fuji, Tasuma Suzuki, Masakazu Niinae, J. Shibata

{"title":"Sulfuric Acid Leaching Behavior of Nickel, Cobalt and Aluminum from Alkaline Leaching Residue of Spent Hydrodesulphurization Catalysts","authors":"K. Manabe, A. Fuji, Tasuma Suzuki, Masakazu Niinae, J. Shibata","doi":"10.4144/RPSJ.61.170","DOIUrl":"https://doi.org/10.4144/RPSJ.61.170","url":null,"abstract":"Catalysts are widely used in petroleum refining and chemical industries. Hydrodesulphurization (HDS) catalysts account for about one third of the total worldwide catalyst consumption. Spent HDS catalysts contain rare metals such as molybdenum, vanadium, nickel and cobalt on an alumina carrier. Among secondary resources, spent HDS catalysts are regarded the most important catalysts for recycling these metals due to not only their large amounts and economic values, but also the environmental concerns if disposed of. In most cases, spent catalysts are treated with hydrometal lurgical leaching processes such as caustic leaching and acid leaching with roasting as a pre-treatment step. In the alka line leaching processes such as sodium carbonate roasting followed by water leaching, most of the molybdenum and vanadium are selectively leached and most of nickel and cobalt are left in the residue after the alkaline leaching of spent HDS catalysts. Therefore, it is important to recover nickel and cobalt from the residue. The main form of nickel and co - balt in the residue is spinel, therefore, it is difficult to extract nickel and cobalt from the residue using mineral acids. In the present study, the effect of grinding, acid concentration, leaching temperature and stirring speed on the leaching efficiency of nickel and cobalt from the residue after sodium carbonate roasting followed by water leaching of spent HDS catalysts with sulfuric acid was investigated. The grinding, sulfuric acid concentration and leaching temper ature significantly affected the leaching efficiency of nickel, cobalt and aluminum. However, the extraction of nickel and cobalt was ca. 80% and ca. 60%, respectively. The spinel was not affected by only mechanical grinding, therefore, it was considered that the extraction of nickel and cobalt was relatively low.","PeriodicalId":20971,"journal":{"name":"Resources Processing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78829164","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

Mechanism of As(V) Removal in Wastewater Treatment Using Fe(III)-Supported Exchange Resins Fe(III)负载交换树脂处理废水中As(V)的去除机理

Resources Processing Pub Date : 2014-01-01 DOI: 10.4144/RPSJ.61.3

F. Futami, C. Tokoro, Sayaka Izawa, S. Owada

引用次数: 3

Removal of Harmful Anions in Aqueous Solution with Various Layered Double Hydroxides 不同层状双氢氧化物对水溶液中有害阴离子的去除

Resources Processing Pub Date : 2013-01-01 DOI: 10.4144/RPSJ.60.131

N. Murayama, D. Sakamoto, J. Shibata, M. Valix

{"title":"Removal of Harmful Anions in Aqueous Solution with Various Layered Double Hydroxides","authors":"N. Murayama, D. Sakamoto, J. Shibata, M. Valix","doi":"10.4144/RPSJ.60.131","DOIUrl":"https://doi.org/10.4144/RPSJ.60.131","url":null,"abstract":"Four types of layered double hydroxides (LDHs) were synthesized by a co-precipitation method. The ability of various LDHs to remove anionic species including As(III), As(V), B, Cr(VI) and Se(IV) was investigated. Removal tests were performed primarily by a batch operation. The Cr(VI) removal was conducted by both batch and column studies. For the column removal tests, LDH pellets were prepared using a granulator and 5% poly-vinyl alcohol solution as binder. Among the LDHs tested, Mg-Al-NO 3 − LDH showed the optimal removal of anionic species, and it demonstrated excellent removal of As(V), Se(IV) and Cr(VI) particularly at the low anionic con- centrations. The order of anionic removal by the LDHs is as follows; Mg-Al-NO 3 − LDH > Mg-Al-Cl − LDH >> Mg-Al-SO 42 − LDH > Mg-Al-CO 32 − LDH. The selective uptake of anion had the following order; As(V) > Se(IV) > Cr(VI) > As(III) > B. This study has demonstrated the uptake of harmful anions is influenced by the two specific factors, (1) the originally intercalated anions in the LDH, and (2) valency of anionic target species in aqueous solution. Column study also demonstrated that about 350 times Cr(VI) in solution per unit volume of LDH pellet can be removed, though this resulted in minor change in pH of the solution and greater NO 3 − elution. This study has revealed the ability of LDH to remove harmful anionic species and its practical application in wastewater treat- ment.","PeriodicalId":20971,"journal":{"name":"Resources Processing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73992625","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: 6

A Study on Precipitation Recovery of Molybdenum from Aqueous Solutions of Ammonium Chloride 从氯化铵水溶液中沉淀回收钼的研究

Resources Processing Pub Date : 2013-01-01 DOI: 10.4144/RPSJ.60.151

Masakazu Niinae, Tasuma Suzuki, A. Fuji, Nanae Matsunaga, J. Shibata

{"title":"A Study on Precipitation Recovery of Molybdenum from Aqueous Solutions of Ammonium Chloride","authors":"Masakazu Niinae, Tasuma Suzuki, A. Fuji, Nanae Matsunaga, J. Shibata","doi":"10.4144/RPSJ.60.151","DOIUrl":"https://doi.org/10.4144/RPSJ.60.151","url":null,"abstract":"Catalysts are widely used in petroleum refining and chemical industries. Hydrodesulphurization (HDS) catalysts account for about one third of the total worldwide catalyst consumption. Spent HDS catalysts contain rare metals such as molybdenum, vanadium, nickel and cobalt on an alumina carrier. Among secondary resources, spent HDS catalysts are regarded the most important catalysts for recycling these metals due to not only their large amounts and economic values, but also the environmental concerns if disposed off. In most cases, spent catalysts are treated with hydromet- allurgical leaching processes such as caustic leaching and acid leaching with roasting as a pre-treatment step. In the alkaline leaching processes, most of the molybdenum and vanadium are selectively leached over aluminum, nickel and cobalt. Vanadium can be separated from molybdenum with a two stage process based on solvent extraction and precipitation stripping. Molybdenum and vanadium are simultaneously extracted with tri-n-octylamine (TOA) at around pH 4 followed by stripping of molybdenum and vanadium with ammonium salt solutions. In the stripping process, vanadium alone is precipitated as ammonium salts of tetraammonium disodium decavanadate decahydrate at pH > 8. In the present study, precipitation method was carried out to recovery of molybdenum from aqueous solutions of ammonium chloride. Molybdenum could be precipitated as tetraammonium octamolybdate pentahydrate with ammo- nium chloride at the pH below 4 and the pH region of precipitation increased with increase of temperature. And also, the precipitation of molybdenum with barium chloride and calcium chloride was also investigated.","PeriodicalId":20971,"journal":{"name":"Resources Processing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74137783","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

Galvanic Leaching of Copper in Waste Printed Circuit Boards Using Manganese Dioxide in Spent Zinc-Carbon Batteries 用废锌碳电池中的二氧化锰电浸废印刷电路板中的铜

Resources Processing Pub Date : 2013-01-01 DOI: 10.4144/RPSJ.60.174

H. Nakazawa, Naofumi Hayashi, Wataru Hareyama

引用次数: 1

Environmental Impact Assessment for Various Feed Processes of Shochu Distillery By-product 烧酒副产各种饲料工艺的环境影响评价

Resources Processing Pub Date : 2013-01-01 DOI: 10.4144/RPSJ.60.72

K. Shimizu, K. Omura, Y. Kitamura, H. Onoda, K. Nagata

引用次数: 0

鉄粉，レモン汁および太陽光による細菌の殺菌・不活化利用铁粉、柠檬汁及太阳光杀灭、灭活细菌

Resources Processing Pub Date : 2013-01-01 DOI: 10.4144/RPSJ.60.138

祐麻鈴木, Noor Diyana Binti Jamil, 正和新苗