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Adsorption, separation and recovery properties of blocky zeolite-biochar composites for remediation of cadmium contaminated soil

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Chinese Journal of Chemical Engineering 2023年第2期54卷 272-279页

作者： miaomiao zhao Degang Ma Yu Ye School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China

Cadmium(Cd) contamination in soils is a global ecological threat. Conventional powdered biochar added to soil can temporarily immobilize Cd but is difficult to separate from soil, leading to secondary release of Cd and posing potential ecological and human health risks. The blocky biochar is also difficult to separate from the soil due to its fragile nature. One of the keys to overcome the difficulties in separating biochar from soil is to improve its mechanical strength. Blocky zeolite-biochar composites(ZBC) that have good mechanical strength were obtained after pyrolyzing the mixture of 50% feedstock and 50% zeolite powder at 400 ℃. ZBC and NaOH-activated ZBC(ZBC_a) were applied to remove Cd from soil. After sieving Cd-loaded ZBC and ZBC_a from soil, the bioavailable Cd content in the soil decreased by 59.70% and 68.54%,respectively. Zeolite contributed to improving both adsorption performance and mechanical properties of the composites. After repeating the process of “remediation-sieving-desorption-regeneration” three times, the recoveries of ZBC and ZBC_a were above 97.00%, and regeneration rates were 48.70-83.26%,respectively. Under simulated mechanical sieving conditions, ZBC and ZBC_a lost only 4.06% and 5.40%of their mass and retained their integrity. Remediation of Cd-contaminated soil with blocky zeolitebiochar composite is sustainable and safe because the removal of bioavailable Cd from soil is permanent rather than a temporary decrease of bioavailability. This study provides a reference for the preparation of separable and recyclable adsorbents for the removal of contaminants from soil.

关键词： Zeolite-biochar composite Adsorption Separation Recycling Cd-contaminated soil

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An improved HASM method for dealing with large spatial data sets

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Science China Earth Sciences 2018年第8期61卷 1078-1087页

作者： Na zhao Tianxiang YUE Chuanfa CHEN miaomiao zhao Zhengping DU State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Jiangsu Center for Collaborative Innovation in Geographic Information Resource Development and Application Nanjing 210023 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100101 China Geomatics College Shandong University of Science and Technology Qingdao 266510 China

Surface modeling with very large data sets is challenging. An efficient method for modeling massive data sets using the high accuracy surface modeling method(HASM) is proposed, and HASM_Big is developed to handle very large data sets. A large data set is defined here as a large spatial domain with high resolution leading to a linear equation with matrix dimensions of hundreds of thousands. An augmented system approach is employed to solve the equality-constrained least squares problem(LSE) produced in HASM_Big, and a block row action method is applied to solve the corresponding very large matrix equations.A matrix partitioning method is used to avoid information redundancy among each block and thereby accelerate the *** including numerical tests and real-world applications are used to compare the performances of HASM_Big with its previous version, HASM. Results show that the memory storage and computing speed of HASM_Big are better than those of HASM. It is found that the computational cost of HASM_Big is linearly scalable, even with massive data sets. In conclusion,HASM_Big provides a powerful tool for surface modeling, especially when there are millions or more computing grid cells.

关键词： Surface modeling HASM Large spatial data

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Developmental toxicity assessment of neonicotinoids and organophosphate esters with a human embryonic stem cell-and metabolism-based fast-screening model

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Journal of Environmental Sciences 2024年第3期137卷 370-381页

作者： Shuxian Zhang miaomiao zhao Shichang Li Renjun Yang Nuoya Yin Francesco Faiola State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

In recent years,neonicotinoids(NEOs)and organophosphate esters(OPEs)have been widely used as substitutes for traditional pesticides and brominated fame-retardants,*** studies have shown that those compounds can be frequently detected in environmental and human samples,are able to penetrate the placental barrier,and are toxic to ***,it is reasonable to speculate that NEOs and OPEs may have potential adverse effects in humans,especially during *** employed a human embryonic stem cell differentiation-and liver S9 fraction metabolism-based fast screening model to assess the potential embryonic toxicity of those two types of *** show that four NEO and five OPE prototypes targeted mostly ectoderm specification,as neural ectoderm and neural crest genes were down-regulated,and surface ectoderm and placode markers *** liver S9 fraction's treatment could generally reduce the effects of the chemicals,except in a few specific instances,indicating the liver may detoxify NEOs and *** findings suggest that NEOs and OPEs interfere with human early embryonic development.

关键词： Neonicotinoids Organophosphate esters Human embryonic stem cells Fast screening model Developmental toxicity

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Effects of iron and humic acid on competition between Microcystis aeruginosa and Scenedesmus obliquus revealed by HPLC analysis of pigments

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Journal of Oceanology and Limnology 2021年第2期39卷 525-535页

作者： miaomiao zhao Qiang HE Chongtai CHEN Yaqi TIAN Jing WEI Pengfei DUAN Haiming WU Ming LI College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province Nanyang Normal UniversityNanyang 473061China Scientific Laboratory of Heyang Agricultural Environment and Farmland Cultivation Ministry of Agriculture and Rural Aff airsHeyang 715300China

Iron is a vital micronutrient for growth of bloom-forming Microcystis aeruginosa and competition with other algae,and its availability is affected by humic *** effect of iron and humic acid on growth and competition between *** and Scenedesmus obliquus was *** results showed the growth of *** and *** in mono-cultures was inhibited by humic acid at low iron concentrations(0.01 mg/L);the maximum inhibition ratios were 67.84%and 38.31%,*** inhibition of humic acid on the two species was significantly alleviated when iron concentrations were 1.00 mg/L,with the maximum inhibition rate reduced to 5.82%for *** and to 23.06%for *** was the dominant species in mixed cultures,and the mutual inhibition between *** and *** at low iron concentration was greater than that at high iron *** inhibition of *** on *** was reduced at low iron concentrations;it increased at high iron concentrations,as concentrations of humic acid rose.

关键词： Microcystis Scenedesmus iron humic acid competition pigment

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A new technique for correction of iatrogenic upper eyelid retraction by using a composite flap of the orbicularis muscle and fascia on the anterior surface of the tarsal plate

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期6卷 116-123页

作者： Kaichong Nie Lidan Chen Xinzhu Qi Shiruo Zhang Xuanyu Yin miaomiao zhao Yuanyuan Du Shanghai EyesShine BeauCare Medical Aesthetic Clinic Shanghai201107China

Background:Upper eyelid retraction is a challenging complication of cosmetic upper eyelid *** avoid extra trauma,we developed a new technique for correcting iatrogenic upper eyelid retraction by postmigrating a compound flap of the orbicularis muscle and fascia(OFC)on the anterior surface of the tarsal *** method extends the aponeurosis of the levator palpebrae superioris muscle(LPS),which can achieve a good correction for post-blepharoplasty ***:We collected data from 15 patients with mild to moderate iatrogenic upper eyelid retraction who were treated at our hospital between February 2017 and December *** OFC was used to replace the missing part of the LPS,and post-migration of the LPS and fixation of the OFC to the tarsal margin were *** outcome measurements included postoperative binocular symmetry,double eyelid smoothness,eyelid fullness,margin reflex distance(MRD1),degree of eyelid closure,and exposure *** patients were followed-up at seven days,one month,and six months ***:One patient with moderate eyelid retraction showed undercorrection 6 months postoperatively,with the upper eyelid margin located at the upper edge of the *** remaining patients had the upper eyelid margin stabilized at 1.0–2.0 mm below the upper corneal *** observational indicators were satisfactory,including binocular symmetry,double eyelid fluency,and eyelid *** the follow-up,no exposure keratitis was *** MRD1 indexes after the operation were significantly different(P<0.001)from those before the ***:Extension and post-migration of the LPS using the orbicularis muscle and OFC structure can effectively correct mild iatrogenic eyelid retraction after ptosis with less damage and good postoperative eyelid morphology and closure function.

关键词： Upper eyelid retraction Levator palpebrae superioris Orbicularis muscle and fascia Migration

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Religious Life In China

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The Journal of Human Rights 2002年第5期1卷 31-33页

作者： zhao miaomiao & XIONG LEI

When he returned to China in 2001 three years after he went to the United States as an exchange student at the State University of Colorado, Denver, Xin Min was surprised to find "an increasing number of young Christi... 详细信息

关键词： more In than Religious Life In China

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Community-Based Management and Treatment Services for Psychosis-China, 2019

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China CDC weekly 2020年第41期2卷 791-796页

作者： miaomiao zhao Ning Ma Xun Wang Xiamin Wu Wufang Zhang Runzi Chen Yulu Wang Lili Guan Hong Ma Xin Yu Lin Lu Peking University Sixth Hospital Peking University Institute of Mental HealthNHC Key Laboratory of Mental Health(Peking University)National Clinical Research Center for Mental Disorders(Peking University Sixth Hospital)BeijingChina

Introduction:Community-based services for psychosis are an important part of mental health services in *** analyzed community-based follow-up and treatment services for psychosis in China in 2019 to provide evidence for policymaking and services ***:Data from the National Information System for Psychosis were used to analyze usage of the information system and the registration,management,and treatment situation of patients with psychosis in China in 2019 and compared the results of 2019 with that of ***:In 2019,100%of cities and counties used the information system and 6,230,157 patients were *** 2019,there were 5,944,724 registered patients(94.05%)in China under community-based follow-up services and 5,375,252 patients(85.04%)had regular follow-ups;5,295,657 patients(83.78%)were treated by taking antipsychotics and 3,354,251(53.07%)patients took medication regularly;4,974,314 patients at home(87.81%)were in stable condition;and there was a significant difference in patients’stable condition and medication-taking rates among eastern,central,and western regions(p<0.05).Compared with 2018,the nationwide regular management rate,medication-taking rate,regular medication-taking rate,and patients’stable rate increased by 2.35%,2.48%,11.29%,and 7.21%*** and Implications for Public Health Practice:Compared with 2018,the level of management and treatment improved significantly but still needs to be further strengthened,especially in western China.

关键词： services treatment Services

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Overcoming genotypic dependency and bypassing immature embryos in wheat transformation by using morphogenic regulators

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Science China(Life Sciences) 2024年第7期67卷 1535-1538页

作者： Ziru Zhou Yawen Yang Guo Ai miaomiao zhao Baozhu Han Chunjie zhao Yiqian Chen Yuwei Zhang Hong Pan Caixia Lan Chao He Qiang Li Jieting Xu Wenhao Yan National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China WIMI Biotechnology Co. Ltd.Changzhou 213025China

Dear Editor,Agrobacterium-mediated transformation technology is of vital importance for functional genomics studies and precision breeding in crops due to low cost and clear genetic manifestation.A morphogenic gene pa... 详细信息

关键词： breeding crops transformation

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Comparative genomics analysis of pathogen's mobilomes

Comparative genomics analysis of pathogen's mobilomes

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第五届全国生物信息学与系统生物学学术大会暨国际生物信息学前沿研讨会高通量时代的生物信息学与系统生物学

作者： Guoqing Wang miaomiao zhao Fengfeng Zhou Department of Pathogenobiology Jilin University Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences

Background:Pathogenic bacteria are notorious for their high frequency of exchanging genetic material with other microbes living in the same environment.A few such mobile genetic elements(mobilome) include pathogenicity islands and antibiotic resistance islands. Methods:The mobilomes of three gram-negative bacterium Enterohemorrhagic Escherichia coli(EHEC) O157:H7 were detected by in silico comparative genomic techniques. Results:We constructed a comprehensive map of Insertion Sequence(IS) elements in three completely sequenced strains of EHEC O157:H7,***,EDL933 and EC4115. 13 IS elements are found to have full copies in EHEC O157.H7 and five of them show transpositions after the divergence of the species *** least 20 genes,including transcriptional regulators and transporters,were disrupted by the insertions of IS elements in each of the three strains. Conclusions:EHEC O157:H7 underwent frequent genomic recombinations with multiple mobile genetic element families,and its termination of replication(Ter) region represents a hot region for all these recombinations.

关键词： mobile genetic element(MGE) mobilome recently active insertion sequences EHEC O157:H7 recombination hot region

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A fundamental theorem for eco-environmental surface modelling and its applications

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Science China Earth Sciences 2020年第8期63卷 1092-1112页

作者： Tianxiang YUE Na zhao Yu LIU Yifu WANG Bin ZHANG Zhengping DU Zemeng FAN Wenjiao SHI Chuanfa CHEN Mingwei zhao Dunjiang SONG Shihai WANG Yinjun SONG Changqing YAN Qiquan LI Xiaofang SUN Lili ZHANG Yongzhong TIAN Wei WANG Ying’an WANG Shengnan MA Hongsheng HUANG Yimin LU Qing WANG Chenliang WANG Yuzhu WANG Ming LU Wei ZHOU Yi LIU Xiaozhe YIN Zong WANG Zhengyi BAO miaomiao zhao Yapeng zhao Yimeng JIAO Ufra NASEER Bin FAN Saibo LI Yang YANG John PWILSON State Key L aboratory of Resources and Environment Information System Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China College of Geomatics Shandong University of Science and TechnologyQingdao 266590China College of Forestry Beijing Forestry UniversityBeijing 100083China School of Land and Resources China West Normal UniversityNanchong 637002China College of Geographical Information and Tourism Chuzhou UniversityChuzhou 239000China Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China Department of Information Engineering Shandong University of Science and TechnologyTai'an 271019China College of Resources Sichuan Agricultural UniversityChengdu 611130China College of Geography and Tourism Qufu Normal UniversityRizhao 276828China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100101China School of Geographical Science Southwest UniversityChongqing 400715China National Disaster Reduction Center of China Ministry of Emergency ManagementBeijing 100721China Department for Population Data China Population and Development Research CenterBeijing 100081China Department for Industrial Standard China Standardization AdministrationBeijing 100088China The Academy of Digital China Fuzhou UniversityFuzhou 350002China National Institute of Environmental Health Chinese Center for Disease Control and PreventionBeijing 100021China School of Information Engineering China University of GeoscienceBeijing 100083China Qian Xuesen Laboratory of Space Technology Beijing 100094China College of Architecture and Urban Planning Chongqing Jiaotong UniversityChongqing 400074China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing

We propose a fundamental theorem for eco-environmental surface modelling(FTEEM) in order to apply it into the fields of ecology and environmental science more easily after the fundamental theorem for Earth’s surface system modeling(FTESM). The Beijing-Tianjin-Hebei(BTH) region is taken as a case area to conduct empirical studies of algorithms for spatial upscaling, spatial downscaling, spatial interpolation, data fusion and model-data assimilation, which are based on high accuracy surface modelling(HASM), corresponding with corollaries of FTEEM. The case studies demonstrate how eco-environmental surface modelling is substantially improved when both extrinsic and intrinsic information are used along with an appropriate method of HASM. Compared with classic algorithms, the HASM-based algorithm for spatial upscaling reduced the root-meansquare error of the BTH elevation surface by 9 m. The HASM-based algorithm for spatial downscaling reduced the relative error of future scenarios of annual mean temperature by 16%. The HASM-based algorithm for spatial interpolation reduced the relative error of change trend of annual mean precipitation by 0.2%. The HASM-based algorithm for data fusion reduced the relative error of change trend of annual mean temperature by 70%. The HASM-based algorithm for model-data assimilation reduced the relative error of carbon stocks by 40%. We propose five theoretical challenges and three application problems of HASM that need to be addressed to improve FTEEM.

关键词： HASM FTEEM Spatial upscaling Spatial downscaling Spatial interpolation Data fusion Model-data assimilation Model coupling

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