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Synthesis of a novel ternary HA/fe-mn oxides-loaded biochar composite and its application in cadmium(Ⅱ) and arsenic(Ⅴ) adsorption

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Journal of Environmental Sciences 2019年第11期31卷 168-176页

作者： Jianhua Guo Changzhou Yan Zhuanxi Luo Hongda Fang Shugang Hu Yinglan Cao Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China College of Food and Biological Engineering Jimei University Xiamen 361021 China College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China

Cadmium (Cd) and arsenic (As) are two of the most toxic ***,the chemical behaviors of these two elements are different,making it challenging to utilize a single adsorbent with high adsorption capacity for both Cd(Ⅱ) and As(Ⅴ) *** solve this problem,we synthesized HA/fe-mn oxides-loaded biochar (HFMB),a novel ternary material,to perform this task,wherein scanning electron microscopy (SEM) combined with EDS (SEM-EDS) was used to characterize its morphological and physicochemical *** maximum adsorption capacity of HFMB was 67.11 mg/g for Cd(Ⅱ) and 35.59 mg/g for As(Ⅴ),which is much higher compared to pristine biochar (11.06 mg/g,0 mg/g for Cd(Ⅱ) and As(Ⅴ),respectively).The adsorption characteristics were investigated by adsorption kinetics and the effects of the ionic strength and pH of solutions.X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FT-IR) revealed that chelation and deposition were the adsorption mechanisms that bound Cd(Ⅱ) to HFMB,while ligand exchange was the adsorption mechanism that bound As(Ⅴ).

关键词： Humic acid fe-mn oxides Biochar Adsorption Cd(Ⅱ) As(Ⅴ)

He,Ne and Ar isotopic composition of fe-mn crusts from the western and central Pacific Ocean and implications for their genesis

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Science China Earth Sciences 2007年第6期50卷 857-868页

作者： G. P. GLASBY Department of Geochemistry GZG Goldschmidtstrasse 1 D-37077 Gttingen Germany

The noble gas nuclide abundances and isotopic ratios of the upmost layer of fe-mn crusts from the western and central Pacific Ocean have been determined. The results indicate that the He and Ar nuclide abundances and isotopic ratios can be classified into two types: low 3He/4He type and high 3He/4He type. The low 3He/4He type is characterized by high 4He abundances of 191×10?9 cm3·STP·g?1 on average, with variable 4He, 20Ne and 40Ar abundances in the range (42.8?421)×10?9 cm3·STP·g?1, (5.40?141)×10?9 cm3·STP·g?1, and (773?10976)×10?9 cm3·STP·g?1, respectively. The high 3He/4He samples are characterized by low 4He abundances of 11.7×10?9 cm3·STP·g?1 on average, with 4He, 20Ne and 40Ar abundances in the range of (7.57?17.4)×10?9 cm3·STP·g?1, (10.4?25.5)×10?1 cm3·STP·g?1 and (5354?9050)×10?9 cm3·STP·g?1, respectively. The low 3He/4He samples have 3He/4He ratios (with R/RA ratios of 2.04?2.92) which are lower than those of MORB (R/R A=8±1) and 40Ar/36Ar ratios (447?543) which are higher than those of air (295.5). The high 3He/4He samples have 3He/4He ratios (with R/R A ratios of 10.4?12.0) slightly higher than those of MORB (R/R A=8±1) and 40Ar/36Ar ratios (293?299) very similar to those of air (295.5). The Ne isotopic ratios (20Ne/22Ne and 21Ne/22Ne ratios of 10.3?10.9 and 0.02774?0.03039, respectively) and the 38Ar/36Ar ratios (0.1886?0.1963) have narrow ranges which are very similar to those of air (the 20Ne/22Ne, 21Ne/22Ne, 38Ar/36Ar ratios of 9.80, 0.029 and 0.187, respectively), and cannot be differentiated into different groups. The noble gas nuclide abundances and isotopic ratios, together with their regional variability, suggest that the noble gases in the fe-mn crusts originate primarily from the lower mantle. The low 3He/4He type and high 3He/4He type samples have noble gas characteristics similar to those of HIMU (High U/Pb Mantle)-and EM (Enriched Mantle)-type mantle material, respectively. The low 3He/4He type samples with HIMU-type noble gas isotopic rati

关键词： fe-mn crusts noble gases isotope geochemistry mantle heterogeneity Pacific Ocean

GEOCHEMICAL CHARACTERISTICS OF fe-mn NODULES AND CRUSTS FROM THE MARIANA RIDGE AND THE WEST PHILIPPINE BASIN

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Chinese Science Bulletin 1991年第14期36卷 1190-1193页

作者：何良彪 First Institute of Oceanography State Oceanography Administration Qingdao 266003 PRC

I. INTRODUCTIONA lot of work on marine fe-mn nodules has been done. However, few reports about the study of fe-mn nodules in the Mariana Ridge and the West Philippine Basin are known. The purpose of this note is to re... 详细信息

关键词： the Mariana Ridge the West Philippine Basin fe-mn nodules and crusts the transition of geochemical characteristics.

ACCUMULATION OF TRANSITION METALS IN fe-mn CONCRETIONS FROM SELECTED SOILS IN NORTH HUAI REGION,JIANGSU AND ITS ENVIRONMENTAL-GEO-CHEMICAL SIGNIFICANCE

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Chinese Science Bulletin 1990年第4期35卷 329-333页

作者：潘根兴 Department of Soil Science and Agricultural Chemistry Nanjing Agricultural University Nanjing 210014 PRC

In an attempt to provide more data about the mechanics of transition metal occurrence and translocation in soil environments, fe-mn concretions are separated from bulk samples of representative soil types and the element contents are determined. The results are reported and discussed in the sense of environmental geochemistry in this article.

关键词： pedogenic fe-mn concretion transition metals environmental geochemistry

fe-Cr-Mo、Cu-Zn-Al、fe-mn合金减振性能的研究

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振动与冲击 2007年第9期26卷 24-26页

作者：黄姝珂李宁文玉华胥永刚滕劲丁胜四川大学制造科学与工程学院成都610065 上海交通大学机械系统与振动国家重点实验室上海200240

针对目前不同阻尼合金之间可比性差的问题,采用同种测试方法研究了fe-Cr-Mo、Cu-Zn-Al和fe-mn三种阻尼合金的阻尼性能和力学性能,有利于针对实际应用条件选取合适的合金。利用倒扭摆测试合金阻尼性能,万能实验机测试力学性能。结果表明:... 详细信息

针对目前不同阻尼合金之间可比性差的问题,采用同种测试方法研究了fe-Cr-Mo、Cu-Zn-Al和fe-mn三种阻尼合金的阻尼性能和力学性能,有利于针对实际应用条件选取合适的合金。利用倒扭摆测试合金阻尼性能,万能实验机测试力学性能。结果表明:同18-8不锈钢相比,三种合金都具有显著的高阻尼性能;fe-Cr-Mo合金的阻尼性能随着应变振幅增加而迅速增加,在1×10-4～2×10-4范围内出现峰值,随后又逐渐下降;Cu-Zn-Al合金的阻尼性能随着应变振幅的增加而增加,在2×10-4左右出现平台;fe-mn合金的阻尼性能随应变振幅的增加呈现线性增加趋势。fe-mn合金的综合力学性能最好,fe-Cr-Mo合金次之,Cu-Zn-Al合金最低。

关键词：阻尼合金 fe-Cr-Mo Cu-Zn-Al fe-mn 阻尼机制振幅效应

Mechanical alloying of fe-mn and fe-mn-Si

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同步辐射装置用户科技论文集 1999年第1期 160-165页

The ball milling of fe-24mn and fe-24mn-6Si mixed powders has been performed by the high energy ball milling *** employing X-ray diffraction and Moessbauer *** ccmposition evolution during the milling process has been *** results indicate the formation of paramagnetic fe-mn or fe-mn-Si alloys with a metastable fcc phase as final *** imply that the fe and mn proceed a co-diffusion meenanism through the surface of fragmented *** thermal stability and composition evolution of the as-milled alloys were discussed comparing with the bulk alloy,.

关键词：合金 fe-mn fe-mn-Si 穆斯鲍尔效应

fe-mn催化剂CO+H2两段法合成汽油（Ⅰ）催化剂性能及反应条件的考察

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天然气化工—C1化学与化工 1991年第2期16卷 20-25页

作者：关玉德曾庆健周敬来中国科学院山西煤炭化学研究所

为提高CO+H2合成汽油收率,研制了fe-mn催化剂,考察了合成反应条件对催化剂性能及产物分布的影响。结果证明,fe-mn催化剂具有合成低碳烯烃和缩小F-T反应产物烃碳数分布的特性,对甲烷选择性也有一定的抑制作用。用于两段法合成汽油,能明... 详细信息

为提高CO+H2合成汽油收率,研制了fe-mn催化剂,考察了合成反应条件对催化剂性能及产物分布的影响。结果证明,fe-mn催化剂具有合成低碳烯烃和缩小F-T反应产物烃碳数分布的特性,对甲烷选择性也有一定的抑制作用。用于两段法合成汽油,能明显提高汽油收率。

关键词：汽油合成催化剂 fe-mn 反应条件

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fe-mn晶格反演势的构建与验证

有色金属工程 2021年第6期11卷 24-28页

作者：李宁张兴广吴冰洁李雪洁杨龙龙孙琨张猛中国核动力研究设计院核反应堆系统设计技术重点实验室成都610014 西安交通大学金属材料强度国家重点实验室西安710049

势函数对分子动力学计算的准确性和可靠性具有决定作用,如何获得精确的势函数一直是最受人们关注的问题之一。为了构建fe-mn原子间的势函数,利用基于密度泛函理论的第一性原理方法分别计算了BCC-fe,BCC-mn及L_(10)-femn体系的结合能曲线... 详细信息

势函数对分子动力学计算的准确性和可靠性具有决定作用,如何获得精确的势函数一直是最受人们关注的问题之一。为了构建fe-mn原子间的势函数,利用基于密度泛函理论的第一性原理方法分别计算了BCC-fe,BCC-mn及L_(10)-femn体系的结合能曲线,而后根据Chen-Mobius晶格反演法得到了FCC-fe和FCC-mn的晶格反演势。然后计算出fe-fe原子和mn-mn原子间按L_(10)结构堆垛的结合能,进而求出fe-mn原子间的结合能,再利用Chen-Mobius晶格反演法,获得fe-mn原子间的晶格反演势,最后选择Morse势函数进行拟合。利用构建的fe-mn势函数进行了L_(10)-femn体系结合能计算,与第一性原理计算的结果对比,表明构建的fe-mn势函数满足自洽性。最后利用所得势函数进行了弹性模量、杨氏模量计算,与试验数据对比基本吻合,表明势函数具有有效性。

关键词： fe-mn 晶格反演法 Morse势函数第一性原理

EFfeCT OF COLD DEFORMATION AND TEMPERING TEMPERATURE ON △E/E-T CURVES OF fe-mn BASE ALLOYS

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Chinese Science Bulletin 1990年第9期35卷 513-517页

作者：谭延昌聂旭阳 Department of Materials Science Northeast University of Technology Shenyang 110006 PRC

Ⅰ. INTRODUCTIONBecause fe-mn base alloys have Invar and Elinvar effects below the anti-magnetic transformation point T_N and because the alloys are free of precious elements, more atten-

关键词： fe-mn base alloys △E effect △E′E-T curves.

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