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Prediction of Extractable Cd,Pb and Zn in Contaminated Woody Habitat Soils Using a Change Point Detection Method

Pedosphere 2016年第3期26卷 282-298页

作者： Christophe WATERLOT Christelle PRUVOT géraldine bidar Clémentine FRITSCH Annette DE VAUFLEURY Renaud SCHEIFLER Francis DOUAY groupe ISA Laboratoire Genie Civil et geo-Environnement(LGCgE)Lille 59046(France) Departement Chrono-Environment UMR UFC/CNRS 6249 USC INRAUniversite Bourgogne Franche-ComteBesancon 25030(France)

Accumulation of heavy metals in soils poses a potential risk to plant production, which is related to availability of the metals in soil. The phytoavailability of metals is usually evaluated using extracting solutions such as salts, acids or chelates. The purpose of this study was to identify the most significant soil parameters that can be used to predict the concentrations of acetic and citric acidextractable cadmium(Cd), lead(Pb) and zinc(Zn) in contaminated woody habitat topsoils. Multiple linear regression models were established using two analysis strategies and three sets of variables based on a dataset of 260 soil samples. The performance of these models was evaluated using statistical parameters. Cation exchange capacity, CaCO_3, organic matter, assimilated P, free Al oxide,sand and the total metal concentrations appeared to be the main soil parameters governing the solubility of Cd, Pb and Zn in acetic and citric acid solutions. The results strongly suggest that the metal solubility in extracting solutions is extractable concentrationdependent since models were overall improved by incorporating a change point. This change point detection method was a powerful tool for predicting extractable Cd, Pb and Zn. Suitable predictions of extractable Cd, Pb and Zn concentrations were obtained, with correlation coefficient(adjusted r) ranging from 0.80 to 0.99, given the high complexity of the woody habitat soils studied. Therefore,the predictive models can constitute a decision-making support tool for managing phytoremediation of contaminated soils, making recommendations to control the potential bioavailability of metals. The relationships between acetic and/or citric acid-extractable concentrations and the concentrations of metals into the aboveground parts of plants need to be predicted, in order to make their temporal monitoring easier.

关键词： acetic acid citric acid contaminated soil extractability metals multiple linear regression model soil parameters

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A new solution to estimate the time delay on the topographic site using time domain 3D boundary element method

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Earthquake Engineering and Engineering Vibration 2020年第3期19卷 611-623页

作者： Reza Tarinejad Mohsen Isari Abdollah Sohrabi-bidar Faculty of Civil Engineering University of TabrizTabrizIran School of geology College of ScienceUniversity of TehranTehranIran

This study focuses on investigating spatial variation of ground motion that has great influence on the dynamic behavior of the large structures located on the surface *** of the most effective parameters on the spatial variation of ground motion is the difference between the arrival time of seismic waves in different points located on the *** this research,a three-dimensional model of the Pacoima Dam site is *** time domain 3 D boundary element method is used to apply non-uniform excitation at the dam *** model is subjected to vertically propagating incident SH and P *** time delay can be characterized by calculating the value of the time delay for which the cross-correlation between two records is ***,to obtain the time delay in a topographic site,a function considering effective parameters such as the height from the canyon base,wave velocity and predominant frequency,is ***,a code was developed for generating the spatially variation of seismic ground *** results show that the proposed functions have an acceptable accuracy in estimating the time delay to generate non-uniform ground motion.

关键词： delay boundary element

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A procedure to predict the precise seismic response of arch dams in time domain using boundary element formulation

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Journal of Rock Mechanics and geotechnical Engineering 2019年第4期11卷 790-803页

作者： Abbasali Taghavighalesari Mohsen Isari Reza Tarinejad Abdollah Sohrabi-bidar Center for Transportation Infrastructure Systems University of Texas at El PasoEl PasoTX79968USA Faculty of Civil Engineering University of TabrizTabriz***Iran School of geology University College of ScienceUniversity of TehranTehran14155-6619Iran

In this context,a new boundary element algorithm based on the time-convoluted traction kernels is employed to evaluate the spatially varying earthquake ground motions of the Pacoima dam in the USA subjected to SH,SV and P incident *** accurate three-dimensional (3D) model of the dam canyon is implemented into the computer code BEMSA to investigate the seismic response of the *** analyses are performed in time domain with a linearly elastic constitutive model for the *** modeling procedure has been validated by the results reported in the existing *** to the results of this study,the response of the dam to earthquake waves is generally influenced by predominant frequency of the incident motion,surface topography,relative distance of observation points,and type of the incident seismic *** the cases considered,the incident SV wave has led to the maximum amplification of incident motions,especially at the left side of the *** results indicate that the proposed procedure can be employed for accurate prediction of a dam response during an earthquake.

关键词： Boundary element method Spatially varying earthquake ground motion Pacoima dam Topography Incident wave

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Contamination,Fractionation and Availability of Metals in Urban Soils in the Vicinity of Former Lead and Zinc Smelters,France

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Pedosphere 2013年第2期23卷 143-159页

作者： C.WATERLOT g.bidar A.PELFRNE H.ROUSSEL H.FOURRIER F.DOUAY Université Lille Nord de France groupe ISA Equipe Sols et Environnement Laboratoire Génie Civil et géoEnvironnement (LGCgE) Lille Nord de France (EA 4515) Département des Sites et Sols Pollués Agence de I'Environment et de la Matrise de I'Energie (ADEME)

Soil contamination by metals from anthropogenic activities （e.g., mining and smelting） is a major concern for the environment and human health. Environmental availability of cadmium （Cd）, lead （Pb）, zinc （Zn）, copper （Cu）, and indium （In） in 27 urban soils located around two former Pb and Zn smelters in Northern France were studied by analysing the chemical forms of these metals and evaluating their phytoavailability. These metals were determined using flame or electrothermal absorption atomic spectrometry （FAAS or ETAAS）, depending on their concentration levels. After optimisation of the ETAAS method, characteristic mass of In in water and aqua regia were 9.9 and 18 pg, respectively, showing the high sensitivity of the analytical procedure. Metal partitioning was conducted using a four-step sequential extraction procedure. The results showed that Cd and Zn were mainly in the acid-extractable and reducible forms in the urban soils studied. In contrast, Pb and In were largely in the reducible fraction. However, in some samples, the amount of In extracted in the residual or exchangeable fraction was higher than that in the reducible fraction. Copper was mainly found in the reducible and residual fractions. A pot experiment was conducted in a glasshouse with seven soils （six contaminated and one uncontaminated） and two plant species, ryegrass and lettuce. The results showed transfer of metals from the contaminated soils to the shoots of ryegrass and the edible part of lettuce. The metal bioconcentration factor was in the order of Cd 〉〉 Cu 〉 In 〉 Zn 〉〉 Pb for lettuce leaves, whereas for ryegrass shoots, three orders were found, Cd 〉 Zn 〉 Cu 〉〉 In 〉 Pb, Cd 〉〉 In 〉 Zn 〉 Cu 〉〉Pb, and Zn 〉 Cd 〉 Cu 〉 In 〉〉 Pb, depending on the physico-chemical properties of the soils, such as pH, cation exchange capacity, carbonates, and organic matter. It was established that the metal toxicity was related to the contamination levels and the physico-chemical properties, including pH, organi

关键词： bioconcentration factor environmental availability metal toxicity sequential extraction soil physico-chemical property

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Analysis of Cadmium in Water Extracts from Contaminated Soils with High Arsenic and Iron Concentration Levels

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Journal of Environmental Science and Engineering 2011年第3期5卷 271-280页

作者： C. Waterlot g. bidar C. Pruvot F. Douay groupe ISA Equipe Sols et Environnement Laboratoire Gdnie Civil et geo-Environnement （LGCgE） Lille Nord de France EA 4515 48 Boulevard Vauban Lille Cedex 59046 France

Cadmium （Cd） concentrations in the water extracts of ten contaminated soils by arsenic （As） with various iron （Fe） contents were measured using inductively coupled plasma atomic emission spectrometry （ICP-AES） and electrothermal atomic absorption spectrometry （ETAAS）, Due to the potential spectral interferences of As and Fe in the quantification of Cd, two methods were used for the background compensation. The first method was based on the use of a deuterium lamp （BgCD2 mode）. The second one required a Cd hollow cathode lamp pulsated with a current for which the intensity varies in the course of time （BgCSR mode）. The results showed that the choices of the analytical technique and the method used for the background compensation depend on the Cd, As and Fe concentrations in the solution and the concentration ratios As/Cd or/and Fe/Cd. In comparison with the ICP-AES and the ETAAS in combination with the BgCD2 mode, it was shown that the high-speed self-reversal method （HSSR） was a more appropriate method to correct As and Fe spectral interferences during the Cd measurements. On the other hand, depending on the Cd concentration, it was established that no significant Fe interference occurred during the Cd determination even if Fe concentration was 50 mg/L, reflecting the efficiency of the HSSR method to overcome the Fe interferences in the determination of Cd concentration by ETAAS without any matrix modifier in water extracts.

关键词： ETAAS cadmium arsenic iron interference.

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Climate Change and Food Price: A Systematic Review and Meta-Analysis of Observational Studies, 1990-2021

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American Journal of Climate Change 2022年第2期11卷 103-132页

作者： Ramesh Allipour Birgani Ali Kianirad Sakineh Shab-bidar Abolghasem Djazayeri Hamed Pouraram Amirhossein Takian Department of Community Nutrition School of Nutritional Sciences and Dietetics Tehran University of Medical Sciences Tehran Iran Agricultural Planning Economic and Rural Development Researches Institute Tehran Iran Department of global Health & Public Policy School of Public Health Tehran University of Medical Sciences Tehran Iran Department Health Management Policy & Economics School of Public Health Tehran University of Medical Sciences Tehran Iran Health Equity Research Center (HERC) Tehran University of Medical Sciences Tehran Iran

Climate extreme events have threatened food security and the second Sustainable development goals (SDgs) “zero hunger” both directly via agricultural food loss and indirectly through rising food prices. We systematically searched and used a combination of results from various models, which play a crucial role in predicting the potential impact of climate change on agricultural production and food price. Therefore, we searched online databases including EMBASE, Web of Science, Scopus, google Scholar, and grey literature. Then observational studies were included from January 1990 to August 2021, which reported food price proportion under climate disturbances. Results showed that 22 out of 26 studies from 615 articles, identified in the meta-analysis predicted the food price ratio would be fluctuated up to 28% before 2020, while the ratio will be marked up at 31% from 2020 to 2049 and then will scale down during 2050-2100. The compiled ratio was estimated at 26% in the long period between 2000 until 2100 under climatic weather events. Drought was a significant weather disturbance with a 32% increase in food prices. Consequently, the Food price increase will significantly affect food accessibility in lower-income countries, primarily until 2050. Policymakers should prioritize and act through redesigning food security policies according to climatic extremes in their settings.

关键词： Climate Change Food Security Food Price Extreme Weather Events Systematic Review

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Urgent need of vitamin D supplementation among Iranian elderly:a cross-sectional study

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The Journal of Biomedical Research 2014年第6期28卷 509-512页

作者： Rezvan Hashemi Sakineh Shab bidar Moloud Payab Ahmad Reza Dorosty-Motlagh Ramin Heshmat Department of Community Nutrition School of Nutritional Sciences and Dietetics School of Public Health and Institute of Public Health Research Tehran University of Medical Sciences Endocrinology and Metabolism Research Center Tehran University of Medical Sciences

Dear Editor：Fortification programs are not established for nutrients like vitamin D among other nutrients in *** is reported that approximately 80%of Iranians do not meet the estimated average requirement for calcium and vitamin *** Iranian Multicenter Osteoporosis Study（IMOS）has shown that more than 80%of Iranians have vitamin D ***,currently,there is no data on vitamin D supplementation in elderly adults in *** carried out a secondary analysis of a bigger population-based cross-sectional study,which was conducted among elderly men and women in the 6^th district of Tehran to determine the frequency of sarcopenia.

关键词： BMD Urgent need of vitamin D supplementation among Iranian elderly

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膳食钠摄入与全因及心血管病死亡率的剂量反应关系

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中华预防医学杂志 2019年第5期53卷 463-463页

作者： Milajerdi A Djafarian K Shab-bidar S 张继国(编译) 黄绯绯(编译) 不详中国疾病预防控制中心营养与健康所

高钠摄入可以导致不同的健康问题。但是,钠摄入与全因及心血管病死亡率之间的关系仍然存在严重争议。这篇文章首次对前瞻性研究中膳食钠摄入与全因及心血管病死亡率的剂量反应关系进行了系统评价和荟萃分析。

关键词：剂量反应关系心血管病膳食钠死亡率健康问题荟萃分析

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Need of Calcium and Vitamin D in Patients after a Recent Fracture

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Food and Nutrition Sciences 2012年第4期3卷 539-547页

作者： Joop J. P. W. van den Bergh Sakineh Shab bidar Sandrine Bours Tineke A. C. M. van geel Piet P. M. M. geusens Department of general Practice Maastricht University Maastricht The Netherlands Department of Internal Medicine Subdivision Rheumatology Maastricht University Medical Centre Maastricht The Netherlands Department of Nutrition and Biochemistry School of Public Health and Institute of Public Health Research Tehran University of Medical Science Tehran Iran VieCuri MC Noord Limburg Venlo The Netherlands

Adequate calcium and vitamin D intake is advocated in guidelines of osteoporosis. However, the dosage needed to achieve an optimal calcium intake and vitamin D status is still a point of debate. Of 902 consecutive patients older than 50 years presenting at the time of fracture, 502 were evaluable for measurement of calcium intake and serum 25(OH)D concentration. We calculated the percentage of patients who needed calcium supplements to achieve intake of ?1000 mg/d and who needed cholecalciferol supplementation to achieve serum levels of ?50 nmol/l. Calcium intake ranged between 250 and 2050 mg/d and serum 25(OH)D between g/d and serum 25(OH)D concentration of ?50 nmol/l was present in 11% of patients. To achieve 1000 mg/d of calcium, 57% of patients needed supplementation of 500 mg/d and 12% needed 1000 mg/d. Systematic calcium supplements of 500 mg/d would achieve an intake of 1000 mg/d in 88%. To achieve serum 25(OH)D concentrations of 50 nmol/l, 41% of patients needed a supplement of 800 IU D3/d and 25% needed higher doses. Systematic supplementation of 800 IU/d would achieve 50 nmol/l in 75% of patients. Calcium intake and vitamin D status vary considerably between fracture patients. Conclusion: calcium supplements need to be titrated individually to achieve desirable levels. Most patients achieved 50 nmol/l of 25(OH)D with 800 IU D3/d. Prospective studies are needed to study how to achieve and maintain optimal serum vitamin D levels and adequate calcium intake.

关键词： Fracture Osteoporosis Secondary Fracture Prevention Calcium Supplementation Vitamin D Supplementation

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Need of Calcium and Vitamin D in Patients after a Recent Fracture

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Food and Nutrition Sciences（食品与营养科学） 2012年第4期

作者： Joop J. P. W. van den Bergh Sakineh Shab bidar Sandrine Bours Tineke A. C. M. van geel Piet P. M. M. geusens

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