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Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar

Journal of Environmental Sciences 2015年第1期27卷 225-231页

作者： Pengjie Hu Younan Ouyang Longhua Wu Libo Shen Yongming Luo Peter christie Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Chinese National Rice Research Institute Yantai Institute of Coastal Zone Research Chinese Academy of Sciences

Pot and field experiments were conducted to investigate the effects of water regimes on the speciation and accumulation of arsenic（As） and cadmium（Cd） in Brazilian upland rice growing in soils polluted with both As and Cd. In the pot experiment constant and intermittent flooding treatments gave 3–16 times higher As concentrations in soil solution than did aerobic conditions but Cd showed the opposite trend. Compared to arsenate, there were more marked changes in the arsenite concentrations in the soil solution as water management shifted, and therefore arsenite concentrations dominated the As speciation and bioavailability in the soil. In the field experiment As concentrations in the rice grains increased from 0.14 to 0.21 mg/kg while Cd concentrations decreased from 0.21 to 0.02 mg/kg with increasing irrigation ranging from aerobic to constantly flooding conditions. Among the various water regimes the conventional irrigation treatment produced the highest rice grain yield of 6.29 tons/ha. The As speciation analysis reveals that the accumulation of dimethylarsinic acid（from 11.3% to 61.7%） made a greater contribution to the increase in total As in brown rice in the intermittent and constant flooding treatments compared to the intermittent-aerobic treatment. Thus, water management exerted opposite effects on Cd and As speciation and bioavailability in the soil and consequently on their accumulation in the upland rice. Special care is required when irrigation regime methods are employed to mitigate the accumulation of metal（loid）s in the grain of rice grown in soils polluted with both As and Cd.

关键词： Arsenic Cadmium Dimethylarsinic acid(DMA) Rice Speciation Water management

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Ulcerative colitis and bullous pemphigoid:Direct association or a medication side effect:A case report

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World Journal of Clinical Cases 2025年第9期13卷 47-52页

作者： Gaelle-christie Haddad Anthony El Dada Sergio Sbeih Tony Kazzi Karam Karam Louis A Chaptini Department of Internal Medicine University of BalamandBeirut 100Lebanon Department of Medicine GastroenterologyUniversity of BalamandBalamand 100Lebanon Department of Medicine Digestive DiseasesYale School of MedicineNew HavenCT 06510United States

BACKGROUND Bullous pemphigoid(BP)is an autoimmune blistering skin *** is associated with other autoimmune disorders and the use of certain *** describe a case of BP in a patient with ulcerative colitis(UC)treated with *** SUMMARY A 38-year-old male patient with UC and a history of multiple flares was maintained on mesalamine with good clinical *** year after starting mesalamine,he sought medical care following the onset of a severe itchy rash of several weeks’duration with a recent appearance of skin bullae.A biopsy of the skin revealed subepidermal blistering dermatitis with focal eosinophilic *** immunofluorescence studies revealed linear IgG and C3 immune reactant deposits at the dermoepidermal junction,consistent with the diagnosis of *** therapy alleviated his ***,tapering prednisone led to re-eruption of the *** BP should be considered when patients with UC develop skin *** BP is not one of the extraintestinal manifestations of UC,there may be an association between these two *** treatment with mesalamine or other therapeutic agents plays a role in the development of BP remains unclear.

关键词： Bullous pemphigoid Ulcerative colitis Autoimmune disorders Skin manifestations in inflammatory bowel diseases Mesalamine Case report

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Effects of long-term fertilizer applications on peanut yield and quality and plant and soil heavy metal accumulation

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Pedosphere 2020年第4期30卷 555-562页

作者： Xiaobing WANG Wuxing LIU Zhengao LI Ying TENG Peter christie Yongming LUO College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225127(China) Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization Nanjing 210095(China)

The status of essential and potentially toxic trace elements in soils and crops can be affected by long-term fertilization practices. This study aimed to investigate changes in peanut (Arachis hypogaea L.) yield and kernel quality, and changes in copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd)concentrations in soil and peanut kernels after 16 years of continuous cropping with different fertilization treatments. Five fertilization treatments were applied at a red soil site in Southeast China:chemical fertilizer (F) containing nitrogen, phosphorus, and potassium, F+trace elements (FT), pig manure (M), M+effective microorganisms (MB), and MB+trace elements (MBT). Properties of soil and pig manure, heavy metal contents in soil and peanut kernels, and the compositions of amino and fatty acids in kernels were determined. Application of pig manure significantly increased peanut biomass, kernel yield, and crude protein and total amino acid contents in kernels, but led to higher amounts of Cu, Zn, and Cd in soil and higher amounts of Zn and Cd in peanut kernels compared with that of chemical fertilizer. There should be greater concern about potential kernel Cd and Zn contaminations resulting from long-term application of pig manure contaminated with potentially toxic metals as an organic fertilizer.

关键词： amino acid chemical fertilizer fatty acid pig manure potentially toxic metal

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Physiological and Antioxidant Responses of Germinating Mung Bean Seedlings to Phthalate Esters in Soil

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Pedosphere 2014年第1期24卷 107-115页

作者： MA Ting-Ting P.christie LUO Yong-Ming TENG Ying Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of Sciences University of Chinese Academy of Sciences Agri-Environment Branch Agri-Food and Biosciences Institute Yantai Institute of Costal Zone Research Chinese Academy of Sciences

Single phytotoxicity of two representative phthalate esters(PAEs),di-n-butyl phthalate(DnBP)and bis(2-ethylhexyl)phthalate(DEHP),was tested in mung bean(Vigna radiata)seedlings germinated for 72 h in soils spiked with varying concentrations(0-500 mg kg^(-1)soil)of DnBP or *** added at up to 500 mg kg^(-1)soil exerted no significant effect on germination but both pollutants significantly inhibited root elongation(P<0.01),DEHP inhibited shoot elongation(P<0.01)and DnBP depressed biomass on a fresh weight basis(P<0.05).Seedling shoot and root malondialdehyde(MDA)contents tended to be stimulated by DnBP but inhibited by ***,increases in superoxide dismutase,peroxidase,ascorbate peroxidase and polyphenol oxidase activities,as well as glutathione(GSH)content,were induced at higher concentrations(e.g.,20 mg kg^(-1))of both *** of proline in both roots and shoots and the storage compounds,such as free amino acids and total soluble sugars,in whole plant was induced under the stress exerted by both *** general responses of mung bean seedlings indicated higher toxicity of DnBP than DEHP on primary growth,during which root elongation was a more responsive *** and GSH were more sensitive parameters in the roots than in the shoots and they might be recommended as physiologically sensitive parameters to assess the toxicity of PAE compounds in soils in future long-term studies.

关键词： glutathione malondialdehyde phytotoxicity root elongation storage compounds

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“Goals Give You Hope”:An Exploration of Goal Setting in Young People Experiencing Mental Health Challenges

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International Journal of Mental Health Promotion 2022年第5期24卷 771-781页

作者： Jamie Penno Sarah Hetrick Grant christie Department of Psychological Medicine The University of AucklandAuckland0626New Zealand

The mental health of New Zealand’s adolescents is,by global standards,remarkably *** such mental health needs is not only pertinent with regards to the quality of life of our young people,but also the health of our society as a whole,with current unmet youth mental health needs becoming future adult population health *** an array of evidence-based psychotherapies are available as treatment,our knowledge of the mechan-ism of actions underlying each of these is *** propose that the practice of goal setting as a therapeutic technique may represent not only a common element across these therapies,but may also signiﬁcantly contribute to their relative efﬁ*** a fuller understanding of goal setting’s usefulness and efﬁcacy,as perceived by youth with mental health difﬁculties,may serve to aid in the development and deployment of more effective interventions,providing a small stepping-stone on the path towards addressing our current youth mental health *** a series of semi-structured interviews with nine young people aged 16–24 years old in New Zeal-and,we strive to create a nuanced understanding of young people’s perception and use of goal setting,and its potential signiﬁcance both within and beyond the realm of *** themes derived from the data include(1)motivation for goal setting and achieving;(2)barriers to goal setting and achieving;(3)strategies for goal achievement;(4)the role of self-efﬁcacy;(5)the role of support;and(6)beneﬁts of goal ***ﬁnd-ings generated from this study suggest that goal setting as a therapeutic technique,when used appropriately,can have signiﬁcant positive impacts on the emotional state,productivity,and view of the future for young people experiencing mental health challenges.

关键词： Mental health mental wellbeing adolescent psychology adolescent wellbeing adolescent medicine mental health recovery

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Gondwana Terrane Assembly in Northern Mozambique:A Snapshot of Crustal Processes in the Monapo Klippe

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地学前缘 2009年第S1期16卷 210-211页

作者： Meagan Webster Jodie Miller christie Rowe Department of Geology Stellenbosch Universityc/o Merriman & Ryneveld Str. Department of Geological Sciences University of Cape Town13 University Avenue

The Nampula Subprovince in Northern Mozambique is a Mesoproterozoic gneiss terrane with a Pan-African(523-550 Ma)amphibolite-facies met- amorphic *** province forms a pivotal part of the evolution and final assembly o... 详细信息

关键词： Monapo Complex Mozambique Gondwana

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Refinement of Methodology for Cadmium Determination in Soil Micro-Arthropod Tissues

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Pedosphere 2017年第3期27卷 491-501页

作者： ZHU Dong KE Xin WU Longhua HUANG Yujuan Peter christie LUO Yongming Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Key Laboratory of Coastal Zone Environmental Processes Yantai Institute of Coastal Zone Research Chinese Academy of Sciences

Highly precise and reliable determination of heavy metals in soil micro-arthropod tissues remains a challenge because of the small size of the animals and their typical low abundance in metal-contaminated agricultural soils. The present study sought to develop a method for cadmium （Cd） determination in soil micro-arthropods by optimizing the sample digestion procedure, reducing sample weight, modifying sample pre-treatment and validating the methodology with field samples. The optimized digestion conditions comprised a sample mass of 50-150 μg, digestion reagent of nitric acid：hydrogen peroxide （3：1）, digestion temperature of 105 ℃, digestion period of 3 h and digestion volume of 30 μL. Defecation of the standard Collembola Folsomia candida （92 h） and the indigenous Collembola Onychiurus yodai （42 h） and ultrasonic cleaning of F. candida increased the accuracy of Cd determination. The recovery of Cd using the refined procedure was 98.9% and the limits of detection and quantification were 0.002 and 0.008 μg L-1, respectively. The within-batch precision values were 〈 3%. The Cd concentrations in the tissues of the Collembola Isotorna sp. collected from a range of metal-contaminated fields determined by the improved method were consistent with the Cd concentrations in the field soils. The results indicate that the optimized method can be used for more accurate or reliable determination of Cd concentrations in soil micro-arthropod tissues.

关键词： digestion defecation Folsomia candida micro-samples predatory mite sample pre-treatment ultrasonic cleaning

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A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid esters in contaminated soils

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Frontiers of Environmental Science & Engineering 2013年第1期7卷 31-42页

作者： Tingting MA Ying TENG Peter christie Yongming LUO Yongshan CHEN Mao YE Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China Graduate University of the Chinese Academy of Sciences Beijing 100049China Agri-Environment Branch Agri-Food and Biosciences Institute Newforge Lane Belfast BT9 5PX United Kingdom State key Laboratory of Environment Simulation and Pollution control (Jomt) Tsinghua University Beijing 100084 China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China

An optimized procedure based on gas chromatography-mass spectrometry (GC-MS) combined with accelerated solvent extraction (ASE) is developed for the analysis of six phthalic acid esters (PAEs), which are priority soil pollutants nominated by United States Environmental Protection Agency (USEPA). Quantification of PAEs in soil employs ultrasonic extraction (UE) (USEPA 3550) and ASE (USEPA 3545), followed by clean up procedures involving three different chromatography columns and two combined elution methods. GC-MS conditions under selected ion monitoring (SIM) mode are described and quality assurance and quality control (QA/QC) criteria with high accuracy and sensitivity for target analytes were achieved. Method reliability is assured with the use of an isotopically labeled PAE, di-n-butyl phthalate-d4 (DnBP-D4), as a surrogate, and benzyl benzoate (BB) as an internal standard, and with the analysis of certified reference materials (CRM). QA/QC for the developed procedure was tested in four PAE-spiked soils and one PAE-contaminated soil. The four spiked soils were originated from typical Chinese agricultural fields and the contaminated soil was obtained from an electronic waste dismantling area. Instrument detection limits (IDLs) for the six PAEs ranged 0.10–0.31 μg·L?1 and method detection limits (MDLs) of the four spiked soils varied from a range of 20–70 μg·kg?1 to a range of 90–290 μg·kg?1. Linearity of response between 20 μg·L?1 and 2 mg·L?1 was also established and the correlation coefficients (R) were all>0.998. Spiked soil matrix showed relative recovery rates between 75 and 120% for the six target compounds and about 93% for the surrogate substance. The developed procedure is anticipated to be highly applicable for field surveys of soil PAE pollution in China.

关键词： phthalic acid esters quality assurance and quality control soil type accelerated solvent extraction certified reference materials

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Optimization of Ex-Situ Washing Removal of Polycyclic Aromatic Hydrocarbons from a Contaminated Soil Using Nano-Sulfonated Graphene

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Pedosphere 2017年第3期27卷 527-536页

作者： GAN Xinhong TENG Ying REN Wenjie MA Jun Peter christie LUO Yongming Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences University of Chinese Academy of Sciences College of Materials and Chemistry Tongren University

Ex-situ soil washing technology offers advantages such as speed and efficiency of remediation and range of application and has been developed to conform with legal requirements and best management practices in USA and some European countries. In this study, nano-sulfonated graphene （SGE） was used as a washing agent to evaluate different processing （washing） parameters for the ectopic leaching removal of polycyclic aromatic hydrocarbons （PAHs） from a coking plant soil. X-ray photoelectron spectroscopy （XPS） and fourier transform infrared spectroscopy （FTIR） were used to analyze the characteristics of the SGE tested. The results showed that SGE had a strong adsorption capacity for PAHs through the role of π-π, H-π, and anion-π interactions. The washing parameters, an SGE concentration of 2000 mg L-1, a liquid/soil （L/S） ratio of 10：1, and 4 cycles of successive washing, were set to arrive to the optimum condition for achieving more than 80% of PAH removal. Under the optimum condition, the PAH removal rate decreased with increasing ring numbers. After one washing cycle at SGE concentration of 2000 mg L-1 and L/S ratio of 10：1, the PAH removal rate of the SCE tested was much higher than that of Tween 80 （TW80） or methyl-β-cyclodextrin （MCD）（P 〈 0.01）. Therefore, SGE is a promising material for the nanoremediation of PAH-contaminated soils.

关键词： adsorption capacity leaching mechanism nanoremediation optimum condition washing agent washing parameter

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Effect of Long-Term Fertilization on Organic Nitrogen Forms in a Calcareous Alluvial Soil on the North China Plain

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Pedosphere 2006年第2期16卷 224-229页

作者： JU Xiao-Tang LIU Xue-Jun ZHANG Fu-Suo P. christie Key Laboratory of Plant-Soil Interactions Ministry of Education College of Agricultural Resources and Environmental Sciences China Agricultural University Beijing 100094 （China） Agricultural and Environmental Science Department The Queen＇s University of Belfast Belfast BT9 5PX （UK）

In order to illustrate the change of nitrogen （N） supply capacity after long-term application of manure and chemical fertilizer, as well as to properly manage soil fertility through fertilizer application under the soil-climatic conditions of the North China Plain, organic N forms were quantified in the topsoil with different manure and chemical fertilizer treatments in a 15-year fertilizer experiment in a Chinese calcareous alluvial soil. Soil total N （TN） and various organic N forms were significantly influenced by long-term application of chemical fertilizer and manure. TN, total hydrolysable N, acid-lnsoluble N, amino acid N and ammonium N in the soil increased significantly （P 〈 0.05） with increasing manure and fertilizer N rates, but were not influenced by increasing P rates. Also, application of manure or N fertilizer or P fertilizer did not significantly influence either the quantity of amino sugar N or its proportion of TN. Application of manure significantly increased （P 〈 0.05） hydrolysable unknown N, but adding N or P did not. In addition, application of manure or N fertilizer or P fertilizer did not significantly influence the proportions of different soil organic N forms.

关键词： chemical fertilizer long-term fertilization manure North China Plain soil organic nitrogen forms

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