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Geochemical signatures and human health risk evaluation of rare earth elements in soils and plants of the northeastern Qinghai-Tibet Plateau,China

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Journal of Arid Land 2022年第11期14卷 1258-1273页

作者： LI Leiming WU Jun LU Jian ZHANG Xiying XU Juan Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Yantai Research Institute Harbin Engineering UniversityYantai 264006China CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai 264003China Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes Xining 810008China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China

Information on rare earth elements(REEs)in soils and plants of the Qinghai-Tibet Plateau is very limited.Therefore,in this study,we performed field sampling to explore the geochemical signatures and human health risk of REEs in soils and plants of the northeastern Qinghai-Tibet Plateau,China.A total of 127 soil samples and 127 plant samples were collected from the northeastern Qinghai-Tibet Plateau to acquire the geochemical signatures and related human health risks of REEs.The mean total concentrations of REEs in soils and plants of the study area reached 178.55 and 10.06 mg/kg,respectively.The light REEs in soils and plants accounted for 76%and 77%of the total REEs,respectively.REEs showed significantly homogenous distribution in soils but inhomogeneous distribution in plants of the study area.Characteristic parameters indicated that light REEs were enriched and fractionated significantly,while heavy REEs were moderately fractionated in soils and plants.REEs in soils and plants showed significantly negative Europium anomaly.Cerium showed slightly positive anomaly in plants and slight anomaly in soils.The normalized distribution patterns of REEs were generally similar in the analyzed soils and the corresponding plants of the study area.The average bio-concentration factor of REEs ranged from 0.0478(Scandium)to 0.0604(Europium),confirming a small accumulation of REEs by plants.Health risks caused by REEs in soils and plants were negligible,while risks for adults were lower than those for children.This study provides important information on REEs in soils and plants of the northeastern Qinghai-Tibet Plateau.

关键词： rare earth elements geochemical signatures human health risk carcinogenic risk bio-concentration factor Qinghai-Tibet Plateau

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Health Risks of Trace Metals in Wastewater-Fed Fishes:A Case Study

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Journal of Metallic Material Research 2019年第1期2卷 5-9页

作者： Aslihan Katip Bursa Uludag University Faculty of EngineeringDepartment of Environmental Engineering16059BursaTurkey

In this study,the usage wastewater from secondary treatment in feeding fishes of Carassius gibelio species and suitability of the fishes for human food were evaluated.The metals(Ag,Al,As and B)in treated effluent and skeleton,skin,eyes and brain tissues of fishes were examined seasonally.It was found that treated effluent was not suitable for irrigation and aquaculture in terms of Al according to the Turkish standard values.According to annual averages the size order of Ag and B concentrations were skeleton>skin>eyes>brain and skeleton>skin>brain>eye respectively.Also,skin>brain>eyes>skeleton was for As and Al.TF(Transfer factor)values of all metals examined were determined as>1 in the four tissues and the metals caused bioaccumulation because of treated effluent.concentrations in muscles were found 7 to 6227 times higher than in water.The size order of TF and BCF(bio-concentration factor)values in skin and eye tissue were the same and it was Ag>Al>As>B.It was Ag>Al>As>B in skeleton,Al>As>Ag>B in brain.HQ(Hazard Quotient)of Al in all tissues had carcinogenic risk level.

关键词： Aquaculture bioaccumulation bio-concentration factor Secondary Treatment Transfer factor

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Cadmium Accumulation and Cadmium Stress Response in Elite Chinese Lettuce(Lactuca sativa)Varieties Under Hydroponic System:Focus on root Morphology,Root Hormones and Antioxidant Enzymes Activities

Cadmium Accumulation and Cadmium Stress Response in Elite Ch...

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中国园艺学会2018年学术年会

作者： Mohammed Mujitaba Dawuda LIAO Weibiao HU Linli YU Jihua XIE Jianming Alejandro Calderon-Urrea JIN Xin WU Yue College of Horticulture Gansu Agricultural University Department of biology California State University

Experiments were conducted to determine the cadmium(Cd)accumulation capacities of selected Chinese lettuce varieties and their response to cadmium stress under hydroponic system. In the first experiment,the Cd accumulation capacities of ten Chinese lettuce varieties(Siji,Ouge,Lüsu,Biyuyi,Lümeng,Yidali,Longsheng,Anyan,Meihuizi and Meiguo)and their potentials for phytoremediation and food safety purposes were assessed. Seedlings of them were transferred to normal Hoagland’s nutrient solution(control)and 0.1 μmol · L CdCl treated Hoagland’s nutrient solution,and monitored for 29 days in a controlled room. Two hyper-accumulators(Yidali and Anyan)and two low accumulators(Lüsu and Lümeng)were selected for the second experiment. In the second experiment,28-day old seedlings of the four varieties were transferred to nutrient solutions without Cd(Control)and with 100 μmol · L Cd Cl for 72 h. Results of the first experiment showed that leaves from the control solution contained Cd at levels above the 0.2 mg · kg maximum recommended by the FAO/WHO,suggesting that hydroponically grown lettuce could contain toxic Cd levels. The application of 0.1 μmol · L Cd led to wide and significant variations in leaf and root Cd levels among the varieties. The highest total Cd bio-concentration factor(BCF)of 3 208.84 was found in Longsheng,and this suggested its potential use for phytoremediation purposes. The least leaf Cd BCF of 3.43 was found in the Lüsu and this could be considered for producing relatively safer lettuce under hydroponic condition. Results of the second experiment showed that Cd toxicity significantly decreased all the root morphological indexes across the varieties. However,Yidali exhibited the greatest tolerance to Cd with the highest tolerance index scores for root volume,surface area,projected area,and numbers of root forks and tips at 72 h. A positive correlation occurred among ABA,GA and IAA under Cd stress but these hormones correlated negatively with the root indexes under the stress condition. Moreover,ABA whi

关键词： lettuce bio-concentration factor cadmium hormone antioxidant enzyme root morphology

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