资源类型

期刊论文 242

年份

2023 29

2022 23

2021 23

2020 17

2019 29

2018 9

2017 14

2016 5

2015 14

2014 11

2013 6

2012 7

2011 6

2010 4

2009 3

2008 5

2007 7

2006 2

2005 3

2004 1

展开 ︾

关键词

增材制造 4

电动汽车 3

回收 2

快速充电 2

植物生长调节剂 2

熔态还原 2

磷肥 2

锂离子电池 2

CO2 加氢 1

Fe、Co、Ru 碳化物 1

HDPE 1

Inconel 718合金 1

K 助剂 1

Mn 助剂 1

MnAl 1

PP 1

Rosenthal方程 1

TA乳粉 1

n 型碳纳米管 1

展开 ︾

检索范围：

排序： 展示方式：

Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

《化学科学与工程前沿（英文）》 2023年 第17卷 第6期   页码 749-758 doi: 10.1007/s11705-022-2261-0

摘要： Since lithium iron phosphate cathode material does not contain high-value metals other than lithium, it is therefore necessary to strike a balance between recovery efficiency and economic benefits in the recycling of waste lithium iron phosphate cathode materials. Here, we describe a selective recovery process that can achieve economically efficient recovery and an acceptable lithium leaching yield. Adjusting the acid concentration and amount of oxidant enables selective recovery of lithium ions. Iron is retained in the leaching residue as iron phosphate, which is easy to recycle. The effects of factors such as acid concentration, acid dosage, amount of oxidant, and reaction temperature on the leaching of lithium and iron are comprehensively explored, and the mechanism of selective leaching is clarified. This process greatly reduces the cost of processing equipment and chemicals. This increases the potential industrial use of this process and enables the green and efficient recycling of waste lithium iron phosphate cathode materials in the future.

关键词： lithium iron phosphate powder     stoichiometric number     selective leaching     lithium recovery    

HTML PDF 收藏

Scrap Iron Filings assisted nitrate and phosphate removal in low C/N waters using mixed microbial culture

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1358-2

摘要：

• Microbes enhance denitrification under varying DO concentrations and SIF dosages.

关键词： Scrap iron filing     Nitrate removal     Phosphate removal     Mixed culture denitrification     Zero valent iron    

HTML PDF 收藏

Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing

Chunlong Zhao, Mingming He, Hongbin Cao, Xiaohong Zheng, Wenfang Gao, Yong Sun, He Zhao, Dalong Liu, Yanling Zhang, Zhi Sun

《化学科学与工程前沿（英文）》 2020年 第14卷 第4期   页码 639-650 doi: 10.1007/s11705-019-1806-3

摘要： In the production of lithium-ion batteries (LIBs) and recycling of spent LIBs, a large amount of low-concentration lithium-containing wastewater (LCW) is generated. The recovery of Li from this medium has attracted significant global attention from both the environmental and economic perspectives. To achieve effective Li recycling, the features of impurity removal and the interactions among different ions must be understood. However, it is generally difficult to ensure highly efficient removal of impurity ions while retaining Li in the solution for further recovery. In this study, the removal of typical impurity ions from LCW and the interactions between these species were systematically investigated from the thermodynamic and kinetics aspects. It was found that the main impurities (e.g., Fe , Al , Ca , and Mg ) could be efficiently removed with high Li recovery by controlling the ionic strength of the solution. The mechanisms of Fe , Al , Ca , and Mg removal were investigated to identify the controlling steps and reaction kinetics. It was found that the precipitates are formed by a zero-order reaction, and the activation energies tend to be low with a sequence of fast chemical reactions that reach equilibrium very quickly. Moreover, this study focused on Li loss during removal of the impurities, and the corresponding removal rates of Fe , Al , Ca , and Mg were found to be 99.8%, 99.5%, 99%, and 99.7%, respectively. Consequently, high-purity Li PO was obtained via one-step precipitation. Thus, this research demonstrates a potential route for the effective recovery of Li from low-concentration LCW and for the appropriate treatment of acidic LCW.

关键词： lithium-containing wastewater     lithium phosphate     precipitation     impurity ion    

HTML PDF 收藏

Arsenic and chromate removal from water by iron chips-Effects of anions

ZHANG Ruihua, SUN Hongwen, YIN Jin

《环境科学与工程前沿（英文）》 2008年 第2卷 第2期   页码 203-208 doi: 10.1007/s11783-008-0036-6

摘要： The purpose of this study is to estimate the removal efficiency of As and Cr (VI) by one kind of industrial waste – iron chips, as well as to estimate the effects of typical inorganic anions (sulfate, phosphate, and nitrate

关键词： phosphate     removal efficiency     industrial     typical inorganic    

HTML PDF 收藏

Selective removal of iron(III) from highly salted chloride acidic solutions by solvent extraction usingdi(2-ethylhexyl) phosphate

Guoping Hu, Yue Wu, Desheng Chen, Yong Wang, Tao Qi, Lina Wang

《化学科学与工程前沿（英文）》 2021年 第15卷 第3期   页码 528-537 doi: 10.1007/s11705-020-1955-4

摘要： Metal ions including Fe , Ca , Mg , Ni , Co and Cu are commonly found in the leaching solution of laterite-nickel ores, and the pre-removal of Fe is extremely important for the recovery of nickel and cobalt. Di(2-ethylhexyl)phosphate acid (D2EHPA) showed high extraction rate and selectivity of Fe over other metal ions. The acidity of the aqueous solution is crucial to the extraction of Fe , and the stoichiometry ratio between Fe and the extractant is 0.86:1.54. The enthalpy for the extraction of Fe using D2EHPA was 19.50 kJ/mol. The extraction of Fe was ≥99% under the optimized conditions after a three-stage solvent extraction process. The iron stripping effects of different reagents showed an order of H C O >NH HCO >HCl>NaCl>NaHCO >Na SO . The stripping of Fe was ≥99% under the optimized conditions using H C O as a stripping reagent.

关键词： solvent extraction     iron     di(2-ethylhexyl)phosphate acid     separation    

HTML PDF 收藏

铁矿粉熔态还原冶炼的新流程

许志宏,王立新,杨章远,谢裕生,胥昌第,招冀

《中国工程科学》 1999年 第1卷 第3期   页码 69-74

摘要：

提出了一种直接用粉矿和煤的熔态还原炼铁新流程，其最大特点是消除污染产生源。为解决过去流化床铁矿粉还原技术中的粘结问题，提出了非等温渗碳的流化移动床的新方法。建议放弃一些工业化国家在熔化气化炉中发展二次燃烧率的指导思想，代之以系统的能量最佳利用原理。提出直接采用粉矿、综合利用尾气和利用高炉下部还原机制的具体建议，用以实现冶金与化工系统的集成，保证系统在技术和经济上成功。为了适应经济全球化的形势发展，建议以自力更生和引进国外技术与资金相结合的方式，促进熔态还原和其他冶金新技术在我国早日成功。

关键词： 熔态还原     粉末     流化移动床     环境保护     技术改造    

HTML PDF 收藏

Enhanced adsorption of phosphate by loading nanosized ferric oxyhydroxide on anion resin

Jing REN,Nan LI,Lin ZHAO,Nanqi REN

《环境科学与工程前沿（英文）》 2014年 第8卷 第4期   页码 531-538 doi: 10.1007/s11783-014-0629-1

摘要： Ferric oxyhydroxide loaded anion exchanger (FOAE) hybrid adsorbent was prepared by loading nanosized ferric oxyhydroxide (FO) on anion exchanger resin for the removal of phosphate from wastewater. TEM and XRD analysis confirmed the existence of FO on FOAE. After FO loading, the adsorption capacity of the hybrid adsorbent increased from 38.70 to 51.52 mg·g . Adsorption processes for both FOAE and anion resin were better fit to the pseudo first order model. Batch adsorption experiments revealed that higher temperature (313K), higher initial phosphate concentration (50 mg·L ) and lower solution pH (pH value of 2) would be more propitious to phosphate adsorption. Competition effect of coexisting anions on phosphate removal can be concluded as sulfate>nitrate>chloride. Freundlich isotherm model can describe the adsorption of phosphate on FOAE more accurately, which indicated the heterogeneous adsorption occurred on the inner-surface of FOAE.

关键词： phosphate removal     adsorption     nanosized ferric oxyhydroxide     anion exchanger    

HTML PDF 收藏

Preparation of lithium ion-sieve and utilizing in recovery of lithium from seawater

Lu WANG, Changgong MENG, Wei MA

《化学科学与工程前沿（英文）》 2009年 第3卷 第1期   页码 65-67 doi: 10.1007/s11705-009-0105-9

摘要： Lithium is one of the most important light metals, which is widely used as raw materials for large-capacity rechargeable batteries, light aircraft alloys and nuclear fusion fuel. Seawater, which contains 250 billion tons of lithium in total, has thus recently been noticed as a possible resource of lithium. While, since the average concentration of lithium in seawater is quite low (0.17 mg·L ), enriching it to an adequate high density becomes the primary step for industrial applications. The adsorption method is the most prospective technology for increasing the concentration of lithium in liquid. Among the adsorbents for lithium, the ion-sieve is a kind of special absorbent which has high selectivity for Li , especially the spinel manganese oxides (SMO), which among the series of ion-sieves, has become the most promising adsorption material for lithium. In this study, the SMO ion-sieve was prepared by a coprecipitation method. The preparation conditions were discussed and the sample characters were analyzed. Recovery of Li from seawater were studied in batch experiments using prepared ion-sieve, and the effect of solution pH and the uptake rates were also investigated in different Li solutions.

关键词： lithium     ion-sieve     seawater     spinel manganese oxide    

HTML PDF 收藏

Capture of carbon dioxide over porous solid adsorbents lithium silicate, lithium aluminate and magnesium

P. V. Korake, A. G. Gaikwad

《化学科学与工程前沿（英文）》 2011年 第5卷 第2期   页码 215-226 doi: 10.1007/s11705-010-1012-9

摘要： The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate, lithium aluminate, and magnesium aluminate at pre- combustion temperatures was studied. Lithium silicate was prepared by the sol gel and solid fusion methods. The lithium silicate adsorbent was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), and surface area. The capturing of carbon dioxide over lithium silicate, lithium aluminate, and magnesium aluminate was explored at different experimental conditions such as exposure time, temperature variation, and exposure carbon dioxide pressure. The capturing process for carbon dioxide was investigated over these adsorbents with variation of their metal mole ratios. The effect of the addition of (promoter) sodium, potassium, and cesium in the lithium silicate adsorbent was explored to investigate the variation of the capture of carbon dioxide over these adsorbents.

关键词： capturing CO2     lithium silicate     lithium aluminate     magnesium aluminate    

HTML PDF 收藏

Lithium-based draw solute for forward osmosis to treat wastewater discharged from lithium-ion battery

《化学科学与工程前沿（英文）》 2022年 第16卷 第5期   页码 755-763 doi: 10.1007/s11705-022-2137-3

摘要： As draw solute is the core element of forward osmosis (FO) technology, here Li-Bet-Tf2N synthesized from a customized ionic liquid betainium bis(trifluoromethylsulfonyl)imide ([Hbet][Tf2N]) and Li2CO3 recovered from lithium-ion battery (LIB) wastes is proposed as a novel draw solute to treat Li+-containing wastewater from LIB manufacturing through FO filtration. Having high dissociation ability and an extended structure, Li-Bet-Tf2N generates a sufficiently high osmotic pressure to drive the FO filtration efficiently along with insignificant reverse solute diffusion. Li-Bet-Tf2N produces a water flux of 21.3 L·(m2·h)−1 at 1.0 mol∙L–1 against deionized water, surpassing conventional NaCl and MgCl2 draw solutes with a higher water recovery efficiency and a smaller solute loss. Li-Bet-Tf2N induces a more stable and higher water permeation flux with a 10.0% water flux decline than NaCl and MgCl2 for which the water fluxes decline 16.7% and 16.4%, respectively, during the treatment of 2000 mg∙L–1 Li+-containing wastewater for 12 h. More remarkably, unlike other draw solutes which require intensive energy input and complicated processes in recycling, Li-Bet-Tf2N is easily separated from water via solvent extraction. Reproducible results are achieved with the recycled Li-Bet-Tf2N. Li-Bet-Tf2N thus demonstrates a novel class of draw solute with great potentials to treat wastewater economically.

关键词： forward osmosis     lithium-ion battery     draw solution     lithium-containing wastewater     water treatment    

HTML PDF 收藏

Orientation effect of electropolishing characteristics of 316L stainless steel fabricated by laser powder

《机械工程前沿（英文）》 2021年 第16卷 第3期   页码 580-592 doi: 10.1007/s11465-021-0633-7

摘要： 3D metal printing process has attracted increasing attention in recent years due to advantages, such as flexibility and rapid prototyping. This study aims to investigate the orientation effect of electropolishing characteristics on different surfaces of 316L stainless steel fabricated by laser powder bed fusion (L-PBF), considering that the rough surface of 3D printed parts is a key factor limiting its applications in the industry. The electropolishing characteristics on the different surfaces corresponding to the building orientation in selective laser melting are studied. Experimental results show that electrolyte temperature has critical importance on the electropolishing, especially for the vertical direction to the layering plane. The finish of electropolished surfaces is affected by the defects generated during L-PBF process. Thus, the electropolished vertical surface has higher surface roughness Sa than the horizontal surface. The X-ray photoelectron spectroscopy spectra show that the electropolished horizontal surface has higher Cr/Fe element ratio than the vertical surface. The electropolished horizontal surface presents higher corrosion resistance than the vertical surface by measuring the anodic polarization curves and fitting the equivalent circuit of experimental electrochemical impedance spectroscopy.

关键词： electropolishing     laser powder bed fusion     316L stainless steel     corrosion resistance     microstructure    

HTML PDF 收藏

A potentiometric cobalt-based phosphate sensor based on screen-printing technology

Lei ZHU,Xiaohong ZHOU,Hanchang SHI

《环境科学与工程前沿（英文）》 2014年 第8卷 第6期   页码 945-951 doi: 10.1007/s11783-013-0615-z

摘要： A potentiometric cobalt-based screen-printing sensor was fabricated by electroplating cobalt on the surface of a screen-printing electrode as the sensitive layer for the determination of dihydrogenphosphate ( ) in wastewater samples. The electrochemical performance of this sensor was fully examined to determine its detection calibration, detection limit, response time, selectivity, and interference with pH, various ions, and dissolved oxygen (DO). The cobalt-based phosphate sensor showed a phosphate-selective potential response in the range of 10 mol·L to 10 mol·L , yielding a detection limit of 3.16 × 10 mol?L and a slope of -37.51 mV?decade in an acidic solution (pH 4.0) of . DO and pH were found to interfere with sensor responses to phosphate. Ultimately, the performance of the sensor was validated for detecting wastewater samples from the Xiaojiahe Wastewater Treatment Plant against the standard spectrophotometric methods for analysis. The discrepancy between the two methods was generally ±5% (relative standard deviation). Aside from its high selectivity, sensitivity, and stability, which are comparable with conventional bulk Co-wire sensors, the proposed phosphate sensor presents many other advantages, such as low price, compactness, ease of use, and the possibility of integration with other analytical devices, such as flow injectors.

关键词： phosphate     cobalt     screen-printing technology     electroplate     wastewater    

HTML PDF 收藏

料浆法磷铵生产工艺发展与五大磷肥工程改造

钟本和

《中国工程科学》 2004年 第6卷 第6期   页码 22-25

摘要：

针对引进磷酸浓缩工艺生产磷铵的技术不适应我国矿产资源具体情况的难题，开发了料浆法磷铵生产工艺技术，已在21个省区布点推广建设了87套装置，形成生产能力279×104 t/a的规模，占全国磷铵生产能力的60%。最近在贵州瓮福实施料浆法磷铵与引进的传统磷酸浓缩工艺联产的成功，为五大磷肥工程的改造提供了一条新的途径。

关键词： 磷肥     磷铵     料浆法磷铵    

HTML PDF 收藏

Advances in polishing of internal structures on parts made by laser-based powder bed fusion

《机械工程前沿（英文）》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0724-0

摘要： The internal structures of metallic products are important in realizing functional applications. Considering the manufacturing of inner structures, laser-based powder bed fusion (L-PBF) is an attractive approach because its layering principle enables the fabrication of parts with customized interior structures. However, the inferior surface quality of L-PBF components hinders its productization progress seriously. In this article, process, basic forms, and applications relevant to L-PBF internal structures are reviewed comprehensively. The causes of poor surface quality and differences in the microstructure and property of the surface features of L-PBF inner structures are presented to provide a perspective of their surface characteristics. Various polishing technologies for L-PBF components with inner structures are presented, whereas their strengths and weaknesses are summarized along with a discussion on the challenges and prospects for improving the interior surface quality of L-PBF parts.

关键词： laser-based powder bed fusion     polishing     internal structures     surface quality     surface features     post process     additive manufacturing    

HTML PDF 收藏

Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

《结构与土木工程前沿（英文）》 2021年 第15卷 第3期   页码 742-753 doi: 10.1007/s11709-021-0732-x

摘要： This study investigates the use of glass fiber-reinforced polyester (GRP) pipe powder (PP) for improving the bearing capacity of sandy soils. After a series of direct share tests, the optimum PP addition for improving the bearing capacity of soils was found to be 12%. Then, using the optimum PP addition, the bearing capacity of the soil was estimated through a series of loading tests on a shallow foundation model placed in a test box. The bearing capacity of sandy soil was improved by up to 30.7%. The ratio of the depth of the PP-reinforced soil to the diameter of the foundation model (H/D) of 1.25 could sufficiently strengthen sandy soil when the optimum PP ratio was used. Microstructural analyses showed that the increase in the bearing capacity can be attributed to the chopped fibers in the PP and their multiaxial distribution in the soil. Besides improving the engineering properties of soils, using PP as an additive in soils would reduce the accumulation of the industrial waste, thus providing a twofold benefit.

关键词： shallow foundation     sandy soil     bearing capacity     soil improvement     pipe powder    

HTML PDF 收藏

标题 作者 时间 类型 操作

Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

期刊论文

Scrap Iron Filings assisted nitrate and phosphate removal in low C/N waters using mixed microbial culture

期刊论文

Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing

Chunlong Zhao, Mingming He, Hongbin Cao, Xiaohong Zheng, Wenfang Gao, Yong Sun, He Zhao, Dalong Liu, Yanling Zhang, Zhi Sun

期刊论文

Arsenic and chromate removal from water by iron chips-Effects of anions

ZHANG Ruihua, SUN Hongwen, YIN Jin

期刊论文

Selective removal of iron(III) from highly salted chloride acidic solutions by solvent extraction usingdi(2-ethylhexyl) phosphate

Guoping Hu, Yue Wu, Desheng Chen, Yong Wang, Tao Qi, Lina Wang

期刊论文

铁矿粉熔态还原冶炼的新流程

许志宏,王立新,杨章远,谢裕生,胥昌第,招冀

期刊论文

Enhanced adsorption of phosphate by loading nanosized ferric oxyhydroxide on anion resin

Jing REN,Nan LI,Lin ZHAO,Nanqi REN

期刊论文

Preparation of lithium ion-sieve and utilizing in recovery of lithium from seawater

Lu WANG, Changgong MENG, Wei MA

期刊论文

Capture of carbon dioxide over porous solid adsorbents lithium silicate, lithium aluminate and magnesium

P. V. Korake, A. G. Gaikwad

期刊论文

Lithium-based draw solute for forward osmosis to treat wastewater discharged from lithium-ion battery

期刊论文

Orientation effect of electropolishing characteristics of 316L stainless steel fabricated by laser powder

期刊论文

A potentiometric cobalt-based phosphate sensor based on screen-printing technology

Lei ZHU,Xiaohong ZHOU,Hanchang SHI

期刊论文

料浆法磷铵生产工艺发展与五大磷肥工程改造

钟本和

期刊论文

Advances in polishing of internal structures on parts made by laser-based powder bed fusion

期刊论文

Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

期刊论文