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Strategies for improving extraction capacity through preorganization structure:A novel 5,6-bicyclicmalonamide extractant(THPPD)

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Journal of Rare Earths 2024年第4期42卷 768-774页

作者： Miaomiao Zhang Zhen Yang Yuhua Cui Jianhui Su Heng Zhao Chengjin Xu Xiaolei Liu guoxin sun Xiujing Peng Yu Cui School of Chemistry and Chemical Engineering University of JinanJinan250022China Institute for Smart Materials&Engineering University of JinanJinan250022China Shandong Institute for Food and Drug Control Jinan250101China

Rational design of extractant structure to improve the extraction and separation capacity of rare earth elements(REEs)is a long-standing ***,a new strategy was proposed to improve the stability of the chelating structure formed by malonamide and *** stability of the chelating structure is greatly improved by using a double-ring framework structure which makes the two carbonyl groups of malonamide unable to rotate freely and both of them point to the metal ion *** benzyl groups were used to construct the hydrophobicity of the extractant and the organic shell of the extracted ***-pyrrolo-pyridine-dione(THPPD)was designed and *** structure reduces the energy consumed by rotating carbonyl group in the coordination with metal ions and then improves the extraction ability of *** crystal structure was preorganized as expected,with the two carbonyls pointing in a favorable coordination direction to the structural complement of the metal *** extraction behaviors of REEs with THPPD in a nitric acid medium were *** with N,N’-dibenzyl-N,N’-dimethylmalonamide(DBDM-MA)with a chain structure,the extraction capacity of THPPD is 360 times higher than that of DBDM-MA at 5.0 mol/L sodium ***,the binding energy and Gibbs free energy were investigated by density functional theory(DFT)in conjunction with the *** theoretical results show that THPPD has more effective interaction with Pr(NO_(3))3 than *** construction of chelating groups conformation is a worthy direction to improve the coordination ability and even selectivity of extractant.

关键词： Rare earth elements Extraction separation 5,6-bicyclicdiamide extractant

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黑龙江省黑土区土壤重金属污染及风险评价

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环境科学与技术 2024年第4期47卷 205-216页

作者：包立旭姜杰孙国新北京林业大学环境科学与工程学院北京100091 中国科学院生态环境研究中心城市与区域生态学国家重点实验室北京100093

为探究黑龙江省黑土区土壤重金属污染现状和生态风险,该文采集黑土区农田表层土壤(0~15 cm)样品(N=303),测定土壤重金属含量及p H值。结合地累积指数法、潜在生态风险指数法与地统计学法对研究区土壤重金属污染水平和生态风险进行评价,... 详细信息

为探究黑龙江省黑土区土壤重金属污染现状和生态风险,该文采集黑土区农田表层土壤(0~15 cm)样品(N=303),测定土壤重金属含量及p H值。结合地累积指数法、潜在生态风险指数法与地统计学法对研究区土壤重金属污染水平和生态风险进行评价,利用绝对主成分-多元线性回归(APCS-MLR)模型和正定矩阵因子分解(PMF)模型进行溯源分析。结果表明:研究区土壤以弱酸性为主,Cr、Ni、Cu、Zn、As、Pb、Cd的浓度分别为(50.60±9.16)、(18.35±5.25)、(26.49±6.35)、(55.71±12.26)、(11.73±3.75)、(20.47±5.12)、(0.13±0.077)mg/kg,有3%点位的Cd超过农用地土壤污染风险筛选值,其他重金属均未超标。地累积指数结果表明,研究区以Cd污染为主,污染率达41%;潜在生态风险指数法表明Cd为主要风险因子,RI均值为77.10,属于低风险。APCS-MLR和PMF模型分析结果一致,均解析出3种相同的污染源,分别为自然与交通混合源、农业源、工业源,APCS-MLR模型中3种污染源贡献率分别为42.02%、15.70%、14.82%,而在PMF模型中分别为37.64%、28.82%、33.54%。综上,黑龙江省黑土区土壤环境质量良好,但要注重Cd的潜在污染。

关键词：黑土重金属污染评价生态风险评价

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人工技术土壤研究进展与展望

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土壤学报 2024年第1期61卷 1-15页

作者：郑瑞伦朱永官孙国新北京市农林科学院草业花卉与景观生态研究所北京100097 中国科学院生态环境研究中心城市与区域生态国家重点实验室北京100085 中国科学院城市环境研究所福建厦门361021 中国科学院大学北京100049

城市绿色基础设施可以解决由城市化引发的诸多环境问题,但城市绿色基础设施建设所需要的大量土壤资源却很匮乏。人工技术土壤(ConstructedTechnosols,CT)是利用有机和无机固体废弃物创造的用于种植植物的新土壤,可通过调整组成材料和配... 详细信息

城市绿色基础设施可以解决由城市化引发的诸多环境问题,但城市绿色基础设施建设所需要的大量土壤资源却很匮乏。人工技术土壤(ConstructedTechnosols,CT)是利用有机和无机固体废弃物创造的用于种植植物的新土壤,可通过调整组成材料和配方满足不同的植被类型、土地用途和立地条件等要求,最终回归城市,用于绿色基础设施建设。CT可同时缓解大量城市固废的处置难题和解决城市绿色基础设施建设的土壤缺乏问题,具有低碳、低成本、低影响的特点,还可产生经济效益。本文主要从CT对植物生长、碳捕获、生物多样性保护、径流污染物滤除方面的作用和人为生物调控方面介绍了CT的研究现状及在我国的应用潜力,并对CT的研究发展进行了展望,提出了一些CT研究中需要解决的问题与建议。旨在推动城市固体废物资源化综合利用和绿色基础设施低碳发展,增加城市碳固存,改善城市地区生态环境和增进人民健康福祉。

关键词：人工技术土壤城市绿色基础设施低碳固体废物资源化生物多样性

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基于风光互补发电系统的压缩空气混合储能系统容量优化

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新能源进展 2024年第1期12卷 74-81页

作者：虞启辉高胜昱孙国鑫刘晓辉内蒙古科技大学机械工程学院内蒙古包头014010

压缩空气储能系统可以有效减少因风能和太阳能随机性造成的弃风弃光现象,但其动态响应时间长,且存储规模配置不合理会影响其发展。为此首先提出液流电池与压缩空气储能组成混合储能系统解决并网型风光互补发电系统输出波动不稳定的问题... 详细信息

压缩空气储能系统可以有效减少因风能和太阳能随机性造成的弃风弃光现象,但其动态响应时间长,且存储规模配置不合理会影响其发展。为此首先提出液流电池与压缩空气储能组成混合储能系统解决并网型风光互补发电系统输出波动不稳定的问题;其次基于典型小时负荷、风力机发电功率和光伏发电功率,针对不同场景,以系统最大收益为目标函数,利用猫群算法优化压缩空气储能系统的容量配置;最后分析压缩空气储能系统的额定容量与额定功率对系统最大收益的影响,验证算法可靠性。结果表明,基于风力机与光伏系统的装机功率分别为20 MW和3.42 MW的场景,压缩空气储能系统容量配置为4 MW和46.5 MW∙h时,其经济性最佳,每周可节约购电成本183688.24元,周最大收益为30543.86元。

关键词：压缩空气储能系统混合储能系统猫群算法容量配置经济性

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九种常绿阔叶植物叶片解剖构造的研究

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北方园艺 2024年第5期 53-61页

作者：孙国馨陈帆孟霄哲黄大庄孟庆瑞河北农业大学园林学院河北保定071066 保定市园林绿化中心河北保定070000

以9种常绿阔叶植物叶片为试材,采用人工低温处理测定其叶片相对含水量和相对电导率,并观测越冬前后叶片的微观解剖构造,通过变异系数、相关分析从8项叶片结构指标中筛选具有代表性的指标进行隶属函数分析和抗寒性综合评价,以期为北方树... 详细信息

以9种常绿阔叶植物叶片为试材,采用人工低温处理测定其叶片相对含水量和相对电导率,并观测越冬前后叶片的微观解剖构造,通过变异系数、相关分析从8项叶片结构指标中筛选具有代表性的指标进行隶属函数分析和抗寒性综合评价,以期为北方树种的选育提供参考依据。结果表明:在低温胁迫下,叶片的相对电导率整体表现为升高趋势、相对含水量整体表现为下降趋势。下表皮、栅栏组织较厚的叶片抗寒性较强,栅海比值和组织结构紧密度越大的植物受低温影响越小。越冬前后,阔叶植物的抗寒排序差异较大,较抗寒的树种有大叶女贞、红叶石楠、广玉兰等。

关键词：常绿阔叶植物低温胁迫叶片解剖构造抗寒性

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Room thermal load prediction based on analytic hierarchy process and back-propagation neural networks

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Building Simulation 2022年第11期15卷 1989-2002页

作者： Xin Tan Zhenjing Zhu guoxin sun Linfeng Wu College of Mechanical Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China

Accurate prediction of the heat load is the basic premise of intelligent regulation of the heating system,which helps to realize effective management of heating,ventilation,air conditioning *** the problem that the weight of each influencing factor is not taken into account in the current heat load prediction and is not highly targeted,this article deeply explores the influence of different factors on the room heat load,and we propose a method to calculate room heat load prediction based on the combination of analytic hierarchy process(AHP)and back-propagation(BP)neural ***,eight environmental factors affecting the heat load are selected as prediction inputs through parametric analysis,and then the weights of each input are determined by AHP and normalize the prediction data by combining expert opinions,and finally do one-to-one training the quantified score and the room heat load to predict the future heat load by BP neural *** simulation tests show that the mean absolute relative error(MARE)of the proposed prediction method is 5.40%.This article also verifies the influence of different expert opinions on the stability of the *** results show that the proposed method can guarantee higher prediction accuracy and stability.

关键词： heating system heat load prediction analytic hierarchy process back-propagation neural network

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Preparation of ultra-high pure scandium oxide with crude product from titanium white waste acid

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Journal of Rare Earths 2023年第5期41卷 764-770,I0005页

作者： Xiujing Peng Ling Li Miaomiao Zhang Yu Cui Xuchuan Jiang guoxin sun Institute for Smart Materials&Engineering University of JinanJinan 250022China School of Chemistry and Chemical Engineering University of JinanJinan 250022China

Recovery of scandium from titanium white waste acid is an essential source of *** and economical production of high purity scandium remains a challenge.A new extractant,N,N,N’,N’-tetracyclohexyl-diglycolamide(TCHDGA),was synthesized,and the separation performance of scandium from impurity metal ions(Ti,Mn,Ba,Fe,Al and Mg)was investigated,The effects of mixing time,acid concentration and temperature on the scandium extraction were *** extraction mechanism was studied by infrared spectroscopy and the Equimole Series *** optimized conditions,the extractant shows a strong affinity to scandium in the nitric acid medium and high extraction separation factors between scandium and these impurity metal ions,A process for the purification of scandium was *** crude product obtained from titanium white waste acid,95%purity scandium oxide,can be purified to 99.99%after only one step of extraction,scrubbing,and stripping:This technology is economical and straightforward and can realize the high-value recovery of scandium in the titanium white waste acid.

关键词： TCHDGA Recovery Scandium Ultra-high pure Titanium white waste acid Rare earths

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Evolution features of in-situ permeability of low-maturity shale with the increasing temperature,Cretaceous Nenjiang Formation,northern Songliao Basin,NE China

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Petroleum Exploration and Development 2022年第3期49卷 516-529页

作者： HE Wenyuan MENG Qi'an LIN Tiefeng WANG Rui LIU Xin MA Shengming LI Xin YANG Fan sun guoxin Daqing Oilfield Co.Ltd. PetroChinaDaqing 163712China Exploration and Development Research Institute of Daqing Oilfield Co.Ltd. Daqing 163712China Heilongjiang Provincial Key Laboratory of Shale Oil&Tight Oil Accumulation Daqing 163712China

Temperature-triaxial pressure permeability testing at the axial pressure of 8 MPa and confining pressure of 10 MPa,closed shale system pyrolysis experiment by electrical heating and scanning electron microscopy analysis are used to study the evolution mechanism of in-situ permeability in the direction parallel to bedding of low-maturity shale from Member 2(K_(2)n_(2))of Cretaceous Nenjiang Formation in northern Songliao Basin with mainly Type I kerogen under the effect of *** the increasing temperature,the in-situ permeability presents a peak-valley-peak *** lowest value of in-situ permeability occurs at 375℃.Under the same temperature,the in-situ permeability decreases with the increase of pore *** in-situ permeability evolution of low-maturity shale can be divided into 5 stages:(1)From 25℃to 300℃,thermal cracking and dehydration of clay minerals improve the ***,the value of permeability is less than 0.01×10^(-3)μm^(2).(2)From 300℃to 350℃,organic matter pyrolysis and hydrocarbon expulsion result in mineral intergranular pores and micron pore-fractures,these pores and fractures form an interconnected pore network at limited scale,improving the *** the liquid hydrocarbon,with high content of viscous asphaltene,is more difficult to move under stress and more likely to retain in pores,causing slow rise of the permeability.(3)From 350℃to 375℃,pores are formed by organic matter pyrolysis,but the adsorption swelling of liquid hydrocarbon and additional expansion thermal stress constrained by surrounding stress compress the pore-fracture space,making liquid hydrocarbon difficult to expel and permeability reduce rapidly.(4)From 375℃to 450℃,the interconnected pore network between different mineral particles after organic matter conversion,enlarged pores and transformation of clay minerals promote the permeability to increase constantly even under stress constraints.(5)From 450℃to 500℃,the stable pore system and cro

关键词： Songliao Basin Cretaceous Nenjiang Formation low-maturity shale in-situ conversion pore-fracture structure in-situ permeability shale oil

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Implication of community-level ecophysiological parameterization to modelling ecosystem productivity:a case study across nine contrasting forest sites in eastern China

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Journal of Forestry Research 2024年第1期35卷 1-11页

作者： Minzhe Fang Changjin Cheng Nianpeng He guoxin Si Osbert Jianxin sun School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China Research Institute of Energy Saving Environmental ProtectionOccupational Safety and HealthChina Academy of Railway Sciences Corporation LimitedBeijing 100081China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Parameterization is a critical step in modelling ecosystem ***,assigning parameter values can be a technical challenge for structurally complex natural plant communities;uncertainties in model simulations often arise from inappropriate model *** we compared five methods for defining community-level specific leaf area(SLA)and leaf C:N across nine contrasting forest sites along the North-South Transect of Eastern China,including biomass-weighted average for the entire plant community(AP_BW)and four simplified selective sampling(biomass-weighted average over five dominant tree species[5DT_BW],basal area weighted average over five dominant tree species[5DT_AW],biomass-weighted average over all tree species[AT_BW]and basal area weighted average over all tree species[AT_AW]).We found that the default values for SLA and leaf C:N embedded in the Biome-BGC v4.2 were higher than the five computational methods produced across the nine sites,with deviations ranging from 28.0 to 73.3%.In addition,there were only slight deviations(<10%)between the whole plant community sampling(AP_BW)predicted NPP and the four simplified selective sampling methods,and no significant difference between the predictions of AT_BW and AP_BW except the Shennongjia *** findings in this study highlights the critical importance of computational strategies for community-level parameterization in ecosystem process modelling,and will support the choice of parameterization methods.

关键词： Biome-BGC Community traits Forest Ecosystems Model parameterization

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基于ANFIS的太阳能-空气源热泵供暖系统温度控制研究

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太阳能学报 2024年第2期45卷 16-22页

作者：谭心吴林锋虞启辉刘泽江王亚辉孙国鑫内蒙古科技大学机械工程学院包头014010

针对太阳能-空气源热泵供暖系统运行环境复杂多变,模糊控制器的设计高度依赖人工经验的问题,提出一种基于自适应神经模糊推理系统(ANFIS)改进的模糊控制方法。该方法利用ANFIS在复杂系统建模中的优势,结合供暖系统温度响应特性和实际运... 详细信息

针对太阳能-空气源热泵供暖系统运行环境复杂多变,模糊控制器的设计高度依赖人工经验的问题,提出一种基于自适应神经模糊推理系统(ANFIS)改进的模糊控制方法。该方法利用ANFIS在复杂系统建模中的优势,结合供暖系统温度响应特性和实际运行数据,建立联合供暖系统变工况ANFIS模型,生成与系统性能适配的模糊规则库并传递给模糊控制器执行。Matlab/Simulink仿真对比试验表明,与单一的模糊控制相比,该方法的控制精度提高了17.65%,调节时间缩短了36.4%,具有更高的控制精度和响应速度。

关键词：太阳能空气源热泵联合供暖模糊控制温度控制 ANFIS

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