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Cadmium found in peanut (Arachis hypogaea L.) kernels mainly originates from root uptake rather than shell absorption from soil

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Pedosphere 2024年第4期34卷 726-735页

作者： Xin TANG Yurong wang Changfeng DING Yuepeng YIN Zhigao ZHOU Taolin ZHANG xingxiang wang CAS Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Ecological Experimental Station of Red Soil Chinese Academy of SciencesYingtan 335211China

Roots and shells are two potential organs through which peanut plants absorb cadium(Cd)from soils;however,the relative contributions of the two uptake pathways(root uptake and shell absorption)to kernel Cd accumulation and their translocation characteristics are poorly *** this study,the relative contributions of the two pathways to Cd accumulation in two peanut cultivars,Xianghua2008(XH)and Yueyou43(YY),were accurately assessed by labeling rooting and podding zone soils with 113Cd and 111Cd isotopes(0.3 mg kg^(-1) dry soil),respectively,in a split-pot *** results showed that approximately 96%of the Cd accumulated in the peanut kernels was derived from root uptake,while only 4%originated from shell *** 1%of the Cd accumulated in whole peanut plants was attributed to shell absorption,of which 41%–44%was retained in shells and 56%–59%was translocated to *** contrast,the Cd absorbed by roots was efficiently translocated into all plant organs,of which 80%–84%was distributed in *** YY accumulated 1.3 times more Cd in whole plants than XH,the relative contributions of the two pathways to Cd accumulation in each plant organ were barely affected by peanut *** to the strong retention effect of shells,shell-derived Cd was approximately 2 times higher than root-derived Cd in *** results would improve the understanding of Cd accumulation processes in peanut plants,revealing that the root uptake pathway contributes predominantly to the Cd concentration in peanut kernels,based on which strategies and technology for the reduction of Cd in peanut plants could be designed and developed.

关键词： contamination heavy metal isotope-labeling technique relative contribution translocation factor uptake pathway

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基于生态安全的我国土壤镉环境基准研究

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地学前缘 2024年第2期31卷 130-136页

作者：丁昌峰周志高王玉荣张桃林王兴祥中国科学院南京土壤研究所江苏南京210008 中国科学院大学北京100049 中国科学院红壤生态实验站江西鹰潭335211

土壤镉(Cd)污染的生态安全问题不容忽视,我国目前尚缺乏基于生态风险的土壤Cd环境基准。本研究通过调研国内外关于土壤Cd的生态毒性研究,收集并筛选基于我国土壤的Cd毒性效应数据,采用物种敏感性分布法并结合Cd的生态毒性预测模型,推导... 详细信息

土壤镉(Cd)污染的生态安全问题不容忽视,我国目前尚缺乏基于生态风险的土壤Cd环境基准。本研究通过调研国内外关于土壤Cd的生态毒性研究,收集并筛选基于我国土壤的Cd毒性效应数据,采用物种敏感性分布法并结合Cd的生态毒性预测模型,推导不同用地方式下的土壤全量和EDTA提取态Cd生态安全环境基准。共收集与筛选出包含13个物种或生态过程的126个土壤Cd生态毒性数据,其中陆生植物毒性数据60个(6个物种)、无脊椎动物毒性数据39个(3个物种)、生态过程毒性数据27个(4种指标)。土壤Cd生态毒性预测模型研究结果表明,土壤pH是影响Cd生态毒性的最重要因子。自然保护地和农业用地、公园用地、住宅用地、商服及工业用地不同土壤pH值范围的土壤全量Cd生态安全基准分别为1.91~5.25、3.94~11.1、7.59~22.0和10.5~30.8 mg·kg^(-1),基于EDTA提取态Cd的生态安全基准分别为1.13~3.12、2.34~6.62、4.51~13.1和6.24~18.4 mg·kg^(-1)。研究结果可为我国土壤污染风险管控标准的制修订提供依据。

关键词：土壤镉生态毒性物种敏感性分布环境基准

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INTERIOR MEHRA-LIKE SOLUTION IN HIGHER DIMENSIONS

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Chinese Physics Letters 1990年第12期7卷 529-532页

作者： wang xingxiang Department of Physics Anhui Normal UniversityWuhu 241000

A new spherically symmetric interior solution in higher dimensions is presented by specifying mass density,Le.k^(2)ρ=A+Br^(2).The solution includes the Schwarzschild-like solution as a,special case and can reduce to ... 详细信息

关键词： interior dimensions dimension

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基于机器学习方法的花生镉富集系数预测

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农业环境科学学报 2024年第6期43卷 1230-1238页

作者：毕卫冬丁昌峰周志高王兴祥土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) 南京210008 中国科学院大学北京100049 中国科学院红壤生态实验站江西鹰潭335211

通过采集我国14个省份花生主产区的100组土壤-花生样品,分析土壤-花生系统镉(Cd)污染特征及土壤理化性质,基于机器学习方法建立花生Cd富集系数预测模型并识别花生富集Cd的重要影响因素。结果表明,采集的全国范围土壤样品总体以酸性为主,... 详细信息

通过采集我国14个省份花生主产区的100组土壤-花生样品,分析土壤-花生系统镉(Cd)污染特征及土壤理化性质,基于机器学习方法建立花生Cd富集系数预测模型并识别花生富集Cd的重要影响因素。结果表明,采集的全国范围土壤样品总体以酸性为主,有60%的土壤pH<6.50,花生籽粒Cd含量均值为0.27 mg·kg^(-1),富集系数均值达到2.42。利用全国以及南北方产区分组数据构建的随机森林模型(R^(2)=0.930~0.966)对花生Cd富集系数的预测性能均明显优于相应的多元线性回归模型(R^(2)=0.471~0.657)。随机森林模型分析结果表明不同区域相对重要性较高的特征变量有所差异,影响北方产区花生Cd富集系数预测最重要的特征变量为土壤游离锰氧化物、游离铁氧化物含量和pH,而影响南方产区花生Cd富集系数预测最重要的特征变量为土壤游离锰氧化物、黏粒、游离铁氧化物和有机质含量。研究表明,相较于传统多元线性回归模型,随机森林模型对花生Cd富集系数的预测性能更为优越,为田间大尺度下土壤-花生系统中Cd的迁移预测提供了新的视角和解决方案。

关键词：土壤花生镉随机森林预测模型

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Effects of several amendments on rice growth and uptake of copper and cadmium from a contaminated soil

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Journal of Environmental Sciences 2008年第4期20卷 449-455页

作者： LI Ping wang xingxiang ZHANG Taolin ZHOU Dongmei HE Yuanqiu Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Heavy metals in variable charge soil are highly bioavailable and easy to transfer into plants. Since it is impossible to completely eliminate rice planting on contaminated soils, some remediation and mitigation techniques are necessary to reduce metal bioavailability and uptake by rice. This pot experiment investigated the effects of seven amendments on the growth of rice and uptake of heavy metals from a paddy soil that was contaminated by copper and cadmium. The best results were from the application of limestone that increased grain yield by 12.5-16.5 fold, and decreased Cu and Cd concentrations in grain by 23.0%--50.4%. Application of calcium magnesium phosphate, calcium silicate, pig manure, and peat also increased the grain yield by 0.3-15.3 fold, and effectively decreased the Cu and Cd concentrations in grain. Cd concentration in grain was slightly reduced in the treatments of Chinese milk vetch and zinc sulfate. Concentrations of Cu and Cd in grain and straw were dependent on the available Cu and Cd in the soils, and soil available Cu and Cd were significantly affected by the soil pH.

关键词： heavy metals amendment bioavailability uptake rice

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A NEW INTERIOR REISSNER-NORDSTRöM SOLUTION

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Chinese Physics Letters 1988年第6期5卷 269-272页

作者： wang xingxiang Department of Physics Anhui Normal UniversityWuhu

A new interior Reissner-Nordstrom solution is presented. The Solution includes the Florides solution as a special case and can reduce to the Wyman's interior solution in the limit of vanishing charge.

关键词： interior vanishing limit

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Highly sensitive luminescent lanthanide metal-organic framework sensor for L-kynurenine

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Journal of Rare Earths 2022年第3期40卷 415-420,I0002页

作者： Ting Tang Min Liu Zhao Chen xingxiang wang Chunguang Lai Liwen Ding Chenghui Zeng Research Center for Ultra Fine Powder Materials College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China

L-kynurenine(L-kyn)is a marker of prostate *** present,the expensive instruments are usually applied to detect L-kyn clinically,which limits its wide application for cancer ***,three lanthanide metal-organic frameworks([Ln(CHO_(2))_(3)]_(n),Ln=Eu,Gd,and Tb)were designed and obtained,and detailly characterized by single crystal X-ray diffraction(SCXRD),powder X-ray diffraction(PXRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA),and luminescence *** study reveals that[Tb(CHO_(2))_(3)]_(n)is a highly selective,ultra-sensitive,of strong anti-interference,highly stable,and non-expensive sensor for prostate cancer marker *** limit of detection(LOD)for L-kyn sensing is a highly sensitive value of 1.0×10^(−9)mol/***,the sensing mechanism is discussed in detail.

关键词： Sensitive Lanthanide metal-organic frameworks(LnMOFs) Sensor Prostate cancer marker L-kynurenine(L-kyn) Rare earths

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Rice(Oryza sativa L.)seedlings enriched with zinc or manganese:Their impacts on cadmium accumulation and expression of related genes

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Pedosphere 2021年第6期31卷 849-858页

作者： Gaoxiang HUANG Changfeng DING Yibing MA Yurong wang Zhigao ZHOU Shun'an ZHENG xingxiang wang Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) School of Geography and Environment Key Laboratory of Poyang Lake Wetland and Watershed ResearchMinistry of EducationJiangxi Normal UniversityNanchang 330022(China) Macao Environmental Research Institute Macao University of Science and TechnologyTaipa 999078Macao(China) Rural Energy and Environment Agency Ministry of Agriculture and Rural AffairsBeijing 100125(China) Ecological Experimental Station of Red Soil Chinese Academy of SciencesYingtan 335211(China) University of Chinese Academy of Sciences Beijing 100049(China)

Cadmium(Cd)contamination in paddy soils means that the rice produced there may be unsafe for human consumption.A hydroponic study was conducted to enrich rice seedlings with zinc(Zn)or manganese(Mn),and the uptake and transport characteristics of Cd in these Zn-and Mn-rich seedlings were subsequently investigated using a greenhouse pot *** results showed that hydroponic cultivation in 10-50μmol L^(-1) Zn(ZnSO_(4)·7 H_(2)O)or50-250μmol L^(-1) Mn(MnSO_(4)·H_(2)O)for 30 d had no significant impact on rice growth,while the accumulation of Zn and Mn was 7.31-18.5 and 25.4-47.7 times higher,respectively,than in the control(no Zn or Mn addition).The accumulation of Cd in the Zn-and Mn-rich rice plants was 26.3%-38.6% and 34.4%-44.5% lower than that in the control,respectively,and the translocation factors of Cd from roots to shoots also decreased by 23.3%-41.3% and 25.3%-37.0%,respectively,after transplanting to Cd-contaminated ***,the relative expression levels of OsIRT1(Oryza sativa iron-regulated transporter 1)were downregulated by 40.1%-59.3% and 16.0%-25.9%,respectively,in the Zn-and Mn-rich seedling *** downregulation may indicate a possible mechanism contributing to the reductions in Cd *** experiments confirmed that the Zn-and Mn-rich seedlings produced brown rice(unpolished rice grains)with significantly decreased concentrations of Cd(34.2%-44.4%).This study provides an innovative method for reducing the food safety risks from rice grown on slightly to moderately Cd-contaminated paddy soils.

关键词： absorption enrichment Cd contamination contaminated paddy soil gene expression hydroponics translocation factor

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Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post in situ mining: a column study and numerical simulation analysis

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环境科学与工程前沿(英文) 2023年第8期17卷 137-151页

作者： Gaosheng Xi Xiaojiang Gao Ming Zhou Xiangmei Zhai Ming Chen xingxiang wang Xiaoying Yang Zezhen Pan Zimeng wang Department of Environmental Science and Engineering Fudan UniversityShanghai 200438China School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China CAS Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Shanghai 202151China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200001China

Ion-absorbed rare earth mines,leached in situ,retain a large amount of ammonium nitrogen(NH4–N)that continuously releases into the surrounding ***,quantitative descriptions and predictions of the transport of NH4–N across mining area with hill slopes are not fully ***,laboratory column experiments were designed with an inclined slope(a sand box)to examine the spatial temporal transport of NH4–N in soils collected from the ionic rare earth elements(REE)mining *** HYDRUS-2D model simulation of the experimental data over time showed that soils had a strong adsorption capacity toward NH4–*** non-equilibrium model(CNEM)could well simulate the transport of NH4–N through the soil-packed *** simulation of the transport-adsorption processes at three flow rates of leaching agents revealed that low flow rate enabled a longer residence time and an increased NH4-N adsorption,but reduced the extraction efficiency for *** the subsequent rainwater washing process,the presence of slope resulted in the leaching of NH4–N on the surface of the slope,while the leaching of NH4–N deep inside the column was ***,the high-intensity rainfall significantly increased the leaching,highlighting the importance of considering the impact of extreme weather conditions during the leaching ***,our study advances the understanding of the transport of NH4–N in mining area with hills,the impact of flow rates of leaching agents and precipitation intensities,and presents as a feasible modeling method to evaluate the environmental risks of NH4–N pollution during and post REE in situ mining activities.

关键词： Ion-absorbed rare earth Ammonium nitrogen transport HYDRUS-2D Numerical simulation

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室性心动过速非药物治疗的研究进展

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心脑血管病防治 2024年第7期24卷 35-39页

作者：施滔俞东霞史嘉然王兴祥浙江大学医学院附属第一医院杭州310016 浙江省慈溪市中医医院心内科 315300 浙江省青春医院心电图室杭州310016

室性心动过速(VT)是心脏病患者不良预后的重要原因之一,且药物疗效有限。近年来,随着植入式心律转复除颤器和导管消融技术等非药物治疗手段的发展,临床中VT患者的预后有了明显改善。目前,非药物治疗成为了临床治疗VT的主要手段,本文结... 详细信息

室性心动过速(VT)是心脏病患者不良预后的重要原因之一,且药物疗效有限。近年来,随着植入式心律转复除颤器和导管消融技术等非药物治疗手段的发展,临床中VT患者的预后有了明显改善。目前,非药物治疗成为了临床治疗VT的主要手段,本文结合目前国内外相关研究和指南共识,围绕这一治疗手段的发展趋势做一综述。

关键词：室性心动过速非药物治疗植入式心律转复除颤器导管消融

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