铁浆法回收垃圾焚烧飞灰中重金属的实验研究

为考察铁浆法回收生活垃圾焚烧飞尘中重金属的可行性,研究了NaCl浓度、铁粉/飞尘、pH及处理时间对重金属回收率的影响,结果表明:铁浆法回收生活垃圾焚烧飞尘中的重金属是可行的。在最佳参数为NaCl浓度0.5mol/L、pH为4、铁粉/飞尘为2、处理时间2 h条件下,飞尘中Pb、Cu、Zn、Cd等重金属回收率可分别达到88.6%、86.7%、90.3%、83.3%。

含金矿物硫脲铁浆法提金综述

文章阐述了硫脲提金的化学过程及硫脲铁浆法提金原理，介绍了国内几大金矿硫脲铁浆法工业试验情况，同时对硫脲金泥的处理和合质金分离的各种方法进行了分析，提出了硫脲铁浆法尚存在的问题以及解决的办法。

含金矿物硫脲铁浆法提金综述

文章阐述了硫脲提金的化学过程及硫脲铁浆法提金原理，介绍了国内几大金矿硫脲铁浆法工业试验情况，同时对硫脲金泥的处理和合质金分离的各种方法进行了分析，提出了硫脲铁浆法尚存在的问题以及解决的办法。

论朱西宁作品中的传统性与现代化——以《铁浆》为例

山东籍台湾地区作家朱西宁的作品《铁浆》通过描述清末民初一个家族的衰败史,细描了时代变迁中山东下层民众的日常生活,不仅具有原乡书写的文学史价值,而且对“妙趣横生而又意味深长的日常生活史”也同样具有研究价值。朱西宁以《铁浆》为代表的系列原乡书写,并不能仅仅概括为单纯的怀乡之作,这些作品中也蕴含了他在国家动荡与民族危亡中的成长历程,昭示着他对资本主义文明冲击下人性的压抑和冷漠的批驳,展现了他对民间文化的美学取向。

古代茶叶染色的试验研究(续一)

2.2.3染色原理探讨试样经媒染后,色相变为黑色、灰色,洗涤牢度明显增加,这些结果验证了茶叶染皂的基本原理是茶多酚与铁离子之间的络合反应。茶多酚在煮染过程中与试样结合,经后媒染处理,铁离子与附着在试样上的茶多酚络合反应生成黑色产物而使试样显黑色,同时也增强了与纤维的结合牢度,耐洗性增强。茶多酚与蛋白质结合能力强、与纤维素结合能力弱,以及茶品种之间的成分差异是造成丝绸与棉、麻染皂黑度不同的主要原因。

Effects of Surfactant on Zinc Recovery by Solvent Extraction during Leaching in HCl-FeCl_3 Solution

The effects of surfactant on the solvent extraction in leachingsphalerite were investigated. It is found that sodium dodecylsulfonate is the effective surfactant in improving the zinc recoveryfrom sphalerite in the aqueous FeCl_3-HCl-tetrachloroethylene system.Through the measurements of surface tension and viscosity of thesphalerite Slurry modified with different surfactants, it isconcluded that sodium dodecyl sulfonate in the concentration rang Of0.05 to 0.2 g·L^-1 can improve the viscosity of sphalerite slurry inthe water, decrease the surface tension of Leaching solution, preventthe aggregation of ore particles, and give very high zinc extraction.

Study of oxygen fugacity during magma evolution and ore genesis in the Hongge mafic–ultramafic intrusion, the Panxi region, SW China

Economic concentrations of Fe–Ti oxides occurring as massive layers in the middle and upper parts of the Hongge intrusion are different from other layered intrusions(Panzhihua and Baima) in the Emeishan large igneous province, SW China. This paper reports on the new mineral compositions of magnetite and ilmenite for selected cumulate rocks and clinopyroxene and plagioclase for basalts. We use these data to estimate the oxidation state of parental magmas and during ore formation to constrain the factors leading to the abundant accumulation of Fe–Ti oxides involved with the Hongge layered intrusion. The results show that the oxygen fugacities of parental magma are in the range of FMQ-1.56 to FMQ+0.14, and the oxygen fugacities during the ore formation of the Fe–Ti oxides located in the lower olivine clinopyroxenite zone(LOZ) and the middle clinopyroxenite zone(MCZ) of the Hongge intrusion are in the range of FMQ-1.29 to FMQ-0.2 and FMQ-0.49 to FMQ+0.82, respectively.The MELTS model demonstrates that, as the oxygen fugacity increases from the FMQ-1 to FMQ+1, the proportion of crystallization magnetite increases from 11 % to 16 % and the crystallization temperature of the Fe–Ti oxides advances from 1134 to 1164 °C. The moderate oxygen fugacities for the Hongge MCZ indicate that the oxygen fugacity was not the only factor affecting the crystallization of Fe–Ti oxides. We speculated that theinitial anhydrous magma that arrived at the Hongge shallow magma chamber became hydrous by attracting the H_2O of the strata. In combination with increasing oxygen fugacities from the LOZ(FMQ-1.29 to FMQ-0.2) to the MCZ(FMQ-0.49 to FMQ+0.82), these two factors probably account for the large-scale Fe–Ti oxide ore layers in the MCZ of the Hongge intrusion.

Petroqenesis of Subduction Zone and Dunite Bodies

The dunite bodies, which extend as the direction of W-E, are exposed to the southeast of Elazlg located within the Eastern Taurus Belt of Turkey. Mafic-Ultramafic section in the Guleman ophiolite consists ofdunite which containing disseminated chromites, wehrlite, gabbros （isotrope gabbro and layered gabbro） and clinopyroxenite. Dunite blocks above the harzburgite massif have irregular contacts with the enclosing peridotites. Dunite blocks are generally around a few of meters. Dunite blocks consist of gabbro and pyroxenite patches. The origin of dunite blocks are belong to the transition zone of harzburgitic ophiolites which is located at the base of the mafic layered section. They are entirely or largely magmatic formed by olivine and chromite ponds at the base of the crustal magma chamber. The rather around of rock pieces within dunite bodies are foliated such as features have been ascribed to the ophiolite being impregnated by and reacting with a melt. Rocks in the bodies show depleted in incompatible trace elements such as Ba, Nbet al., characteristic of subduction related magma. Furthermore, the high LREE/HREE and high Rb/Th ratios indicates a mantle that has been enrichmented by subduction. As a result, isotopic data, petrographic and geochemical of bodies＇s result suggest a parental magma derived from an enrichmed source of subduction zone. A few meters of the large dunite bodies, and ascribes to the central dunites a cumulative origin by fractionation from a picritic melt.

Co-processing petroleum catalytic slurry with coal

It is studied that reactivity of petroleum catalytic slurry （PCS） and coal with Fe catalyst in 1 L autoclave, the fol- lowing is mainly discussed, coal conversion and asphalt properties, especially related with petroleum cracking slurry （PCS） properties. The results show that co-processing conversion and asphalt yield increase with the increase of PCS ratio. PCS prop- erties have important effect on coal conversion and asphalt properties. One kind of PCS shows negative effect on coal conver- sion. High aromatic PCS can lead to high ductility asphalt with good colloid properties. Coal and the PCS can lead to a strong matching effect.

Bioleaching of pyrrhotite by Sulfobacillus thermosulfidooxidans

The bioleaching of pyrrhotite was investigated using Sulfobacillus thermosulfidooxidans.The effects of pH,pulp concentration,inoculation amount,external addition of ferrous and ferric ions were examined.The pH is found to exert a profound effect on the leaching process for controlling the bacterial activity and precipitation of ferric ions mainly as jarosite.The results show that low pulp content increases the leaching rate of iron.The inoculation amount from 1×107 cell/mL to 1×108 cell/mL has positive effects on the leaching rate.The results also imply that addition of ferrous sulfate(1 g/L) is required for the bacteria to efficiently drive the extraction of iron,however,the leaching efficiency has no obvious enhancement when 2 g/L ferrous sulfate was added.Comparatively,addition of ferric sulfate(2 g/L) significantly inhibits the bioleaching process.At the end of bioleaching,jarosite and sulfur are observed on the surface of pyrrhotite residues by using XRD and SEM.With the passivation film formed by jarosite and sulfur,the continuous iron extraction is effectively blocked.

Deterioration of Concrete by the Oxidation of Sulphide Minerals in the Aggregate

Cases of degradation of concrete associated to iron sulphides in aggregates were recently recognized in the Trois-Rivi6res area, Canada. The aggregate used to produce concrete was an anorthositic gabbro containing various proportions of pyrite, pyrrhotite, chalcopyrite and pentlandite. Quantitative microanalysis on sulphide minerals show that pyrrhotite contains small amount of Ni, Co, Cu and As substituting for Fe in the mineral structure. Considering element substitution, x value in the chemical formula （Fe~.xS） was calculated to 0.099 in the pyrrhotite studied. Petrographic examination of damaged concretes showed the presence of oxidized pyrrhotite. The observation of polished samples shows, in several cases, that the pyrite is intact while the pyrrhotite presents evident signs of oxidation. In the presence of water and oxygen, pyrrhotite oxidizes to form iron oxyhydroxides and sulphuric acid. The acid then reacts with the phases of the cement paste and provokes the formation of gypsum and ettringite. These minerals were observed by SEM-EDS （scanning electron microscope/energy dispersive x-ray spectrometer） and their precipitation causes a volume increase that creates expansion and cracking of the concrete.

Single dose of intra-muscular platelet rich plasma reverses the increase in plasma iron levels in exercise-induced muscle damage:A pilot study

Background:Platelet rich plasma(PRP) therapy is widely used in enhancing the recovery of skeletal muscle from injury.However,the impact of intramuscular delivery of PRP on hematologic and biochemical responses has not been fully elucidated in exercise-induced muscle damage.The purpose of this investigation the effects of intramuscular delivery of PRP on hematologic and biochemical responses and recovery strategy muscle damage induced by high intensity muscle exercise(exercise-induced muscle damage,EIMD).Methods:Moderately active male volunteers participated in this study and were assigned to a control group(control,n = 6) and PRP administration group(PRP,n = 6).The subjects performed exercise with a load of 80% one repetition maximum(1RM) maximal voluntary contraction of the elbow flexors until point of exhaustion of the non-dominant arm was reached.The arms were treated with saline or autologous PRP post-24 h EIMD.Venous blood samples were obtained in the morning to establish a baseline value and 1–4 days post-exercise and were analyzed for serum ferritin,iron,iron binding capacity(IBC),creatinine kinase(CK),lactate dehydrogenase(LDH),aspartate aminotransferase(AST),and alanine aminotransferase(ALT).Results:The baseline levels of plasma iron,ferritin,IBC,CK,LDH,AST,and ALT were similar in both the control and PRP groups.However,24-h following exercise a significant increase in these parameters was observed in both groups between 1 and 4 days during the recovery period.Interestingly,PRP administration decreased plasma iron levels compared to the control on the second day post-exercise.Plasma IBC increased in PRP group from Days 2 to 4 post-exercise compared to the control group whilst PRP administration had no effect on plasma ferritin,CK,AST,ALT,or LDH.Conclusion:Acute exhaustive exercise increased muscle damage markers,including plasma iron,IBC,and ferritin levels,indicating muscle damage induced by exercise.PRP administration improves inflammation by reversing the increase in the iron levels post-exercise without displaying any myotoxicity and may have a role to play in the recovery of exercise-induced muscle damage.

苦中有乐

古人云:“书山有路勤为径,学海无涯苦作舟,近十年的学习生涯,我也多少品尝到了一点儿其中的苦味,然而正和千千万万的人们一样,我却更加热爱学习,甘心情愿地吃苦,这是为什么呢? 要回答这个问题,我想从矛盾谈起。矛盾存在于一切事物之中,并贯串于每一事物发展过程的始终。学习同样也充满了矛盾,其中苦与乐就是一对十分尖锐的矛盾,但它们之间存在着一种辩证的关系:苦中有乐。

铁匠苏希奋:坚守铸造手艺,“铸”就不凡生活

叮叮当当地敲铁、打磨、抛光声回荡在300多平方米的作坊里。56岁的苏着奋正将高温的铁浆注入模具中,待其冷却定型后拆开模具、捣碎泥沙,瞬间一只精巧的香炉便呈现在眼前。最后,打磨抛光、油扫上色作为广东省肇庆市怀集县马宁镇苏沙村小有名气的铸造工匠,苏希奋39年来一直坚守着铸造传统手艺也“铸”就了他的不凡生活。“这一行当确实能够养家糊口,看着火红的铁浆我心里才踏实。”他说。

机器“文明”

曼彻斯特的清晨总是带着薄雾,天空沉郁凝重,压得极低,晨曦就像毛巾里最后的水,怎么使劲也突破不了束缚。近郊的厂房鳞次栉比,城市就像一个病人,脸上总是阴翳。这个时候,马侍恩已经踩着黑乎乎的煤渣铺就的行道,往东边去了。马侍恩如此热爱机器,倒不是爱上其中的奥妙,可能是,可能是因为machine的发音和他的"名字一样。

Compositional dependence of microstructure and tribological properties of plasma sprayed Fe-based metallic glass coatings

Gas-atomized powders of three Fe-based glass-forming alloys were sprayed on mild steel substrates by atmospheric plasma spaying using the same spaying parameters. Microstructures, thermal stabilities and tribological properties of the sprayed coatings were analyzed. The coating performances showed a strong dependence on the intrinsic characters of the compositions, i.e., glass-forming ability （GFA） and supercooled liquid region （ATx）. The coatings tended to exhibit higher amorphous phase fraction for the composition with higher GFA and lower porosity for that with larger ATX. All the coatings exhibited superior wear resistance compared with the substrate. Higher wear resistance could be obtained in coatings with higher amorphous phase fraction, i.e. higher GFA of the composition. This study has important implications for composition selecting and optimizing in the fabrication of metallic glass coatings.

Early Paleozoic granitic magmatism related to the processes from subduction to collision in South Altyn, NW China

Four episodes of granitic rocks at 517, 501-496, 462-451, and 426-385 Ma occurred in the South Altyn subduction-collision complex. The first episode of granite emplacement predates the formation of the ophiolite type mafic rock （〉500 Ma）, and the three subsequent episodes can be temporally correlated to high-pressure （HP） to ultrahigh-pressure （UHP） metamorphism at ca 500 Ma, retrograde granulite-facies metamorphism at ca. 450 Ma, and amphibolite-facies metamorphism at ca. 420 Ma, re- spectively. A comprehensive study of these granitic rocks, along with the regional geological background, mafic-ultramafic rocks, and HP-UHP metamorphism, indicates that the four episodes of granitic magmatism are sequentially derived from the partial melting of the earlier subducted oceanic crust at 517 Ma, the thickened continental crust due to continental subduction at ca. 500 Ma, the mid-upper crust in response to slab breakoff at ca. 450 Ma, and the tectonic transition from contraction to extension at ca. 420 Ma. The formation age of 517 Ma for oceanic adakite provides a direct constraint on the time of the oce- anic subduction in South Altyn. In addition, there is a ca. i0 Myr interval between the oceanic subduction to the continental deep subduction, suggesting that the Early Paleozoic tectonic evolution might have been a successive process in South Altyn. The four episodes of formation of granitic rocks, mafic-ultramafic rocks, and HP-UHP metamorphic rocks have fully recorded the tectonic evolution, beginning with the oceanic subduction, followed by continental subduction, and later exhumation dur- ing the Early Paleozoic in South Altyn.