检索结果-内蒙古大学图书馆

Application of fungi as bioflocculant for mine drainage treatment with extra high total suspended solid

AIP Conference Proceedings 2020年第1期2245卷

作者： Reza Adhi Fajar Jayen Aris Kriswantoro Pingkan Aditiawati Lilik Eko Widodo Ahmad Baiquini Post Graduate Program in Mining Engineering ITB Ganesa 10 Bandung Indonesia Department of Civil and Mining Engineering Poliban Kayutangi Banjarmasin Indonesia Graduate Program in Biotechnology School of Life Sciences and Tech. ITB Ganesa 10 Bandung Indonesia Department of Microbiology School of Life Sciences and Technology ITB Ganesa 10 Bandung Indonesia Research Group for Earth Resources Exploration ITB Ganesa 10 Bandung Indonesia Senior Hydrogeology PT.BC Pemuda 40 Tanjung Redeb Berau Indonesia

Liquid waste with a high amount of total suspended solids (TSS) is one of the significant environmental issues from coal mining activities in Kalimantan island under high precipitation in of an extensive zone of coverage. The TSS concentration with Nano-sized particle in mine drainage is caused by clay minerals which are dominated by montmorillonite type. Therefore, a vast chemical agent is usually used to treat TSS concentrations of liquid waste less than 300 mg/L based on government regulation. However, in this case, the chemical flocculant triggers the onset of secondary pollutant because of carcinogenic and non-biodegradable conditions. This study aims to observe specific fungi, Marasmius sp, as bio-flocculant for the treatment of mine drainage with extra high TSS. The fungi can produce a biodegradable polymer that precipitate the montmorillonite with two-mode action, namely bio-flocculant polymerization and mycelial trapping. A role model was performed in a laboratory-scale less than 1 L in several graduated/measuring cylinders under 22-30 °C. The results of clarity and flocculation rate tests indicated that the minerals in the mine drainage samples from *** mining excavation area, had been precipitated rapidly. The clarity test by using spectrophotometer indicated that eighty six percent (86%) clarity value averagely in one-hour treatment, while the TSS concentration amount decreased down to 110.1 mg/L from original measured at 11,000 mg/L based on the flocculation rate test.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Evaluation of phase formation and physical-mechanical properties of Portland cements produced with civil construction waste

引用

CEMENT 2021年 5卷

作者： F.N. Costa D.V. Ribeiro Post-Graduate Program in Civil Engineering (PPEC)/Federal University of Bahia Rua Aristides Novis 02. Federação Salvador BA 40210-630 Brazil Department of Materials Science and Technology Federal University of Bahia Rua Aristides Novis 02. Federação Salvador BA 40210-630 Brazil

Cement is the most widely used building material worldwide. Its production demands a large amount of natural resources, in addition to high energy consumption. Thus, the cement industry has been looking for solutions that effectively reduce the use of these resources as well as greenhouse gas emissions. This research aims to show the technical feasibility of incorporating civil construction waste (CCW) in the production of Portland cement. To this purpose, the physicochemical characterization of the raw materials used was carried out, dosage and manufacture of the raw mix, which were calcined at 1450 °C. Clinkers were characterized mineralogically, by means of XRD, to verify the formation of the crystalline phases. Subsequently, the clinkers were ground, resulting in Portland cements, and their physical-mechanical properties were evaluated. The results showed the potential of using CCW as an alternative raw material, since experimental cements presented performance similar to industrial cements used as a reference.

关键词： civil construction waste (CCW Reuse Environment Cement Compressive strength

来源：评论

学校读者我要写书评

暂无评论

Sustainability assessment of groundwater in south-eastern parts of the western region of Ghana for water supply

Cleaner Water

引用

Cleaner Water 2024年 1卷

作者： Ernest Biney Bernard Akwasi Mintah Ernest Ankomah Albert Elikplim Agbenorhevi Daniel Buston Yankey Ernestina Annan Department of Geomatic Engineering Kwame Nkrumah University of Science and Technology University Post Office Box PMB Kumasi Ghana WASCAL Graduate Research Programme on Climate Change and Land Use Department of Civil Engineering Kwame Nkrumah University of Science and Technology Kumasi Ghana Department of Geological Engineering University of Mines and Technology Tarkwa Ghana Graduate Research Program on Climate Change and Water Resources West African Science Service Center on Climate Change and Adapted Land Use (WASCAL) University of Abomey-Calavi Benin

The study assessed the physicochemical and biological properties of selected groundwater sources in the Southeastern part of the Western Region, to assess the impact on water quality and health risk. The Piper Trilinear plot was used to categorize the water samples into water types based on the dominant anion and cation concentrations. Statistical analysis (One way ANOVA and two sample t-test) was used to determine the sources of variation in the data at 95% confidence interval. The Water Quality Index (WQI) and Hazard Quotient (HQ) were used to estimate the water quality and health risk respectively. TDS and turbidity were above the acceptable WHO guidelines in 16.7% of the samples with a mildly acidic pH in 83.3% of the water samples. Also, 91.7% of the water samples were contaminated with total coliform (TC) and 25% with e-coli. Generally, the groundwater samples were dominated by Ca 2+ and HCO 3- ion water types. The variations between parameters were found not significant for all the parameters (p>0.05). Water samples in the North are of good quality with a mean WQI of 96, but of poor quality in the South with a mean WQI of 144.6. HQ values for all the samples were less than 0.1, suggesting less harmful impacts of the heavy metal concentrations on human health. Overall, the results showed the presence of heavy metals in the groundwater sources sampled, however in quantities with low health risks either through oral or dermal channels. Groundwater within the communities is good for domestic purposes but needs treatment for drinking. To improve upon the study, it is recommended that further studies consider a higher number of samples and include other accessible groundwater stations where possible.

关键词： Health Risk Assessment Groundwater GIS Trace elements Water Quality Index

来源：评论

学校读者我要写书评

暂无评论

COVID-19 pandemic exacerbated food insecurity in South American countries

引用

Food Security 2025年 1-22页

作者： Vasconcelos-Neto, Carlos Frederico A. Jacob, Michelle Tregidgo, Daniel Valle, Denis El Bizri, Hani R. Gomes, Sávio Marcelino Fa, Julia E. Morcatty, Thais Q. Monteiro, Frederico Ozanan Barros Scofield, Alessandra Matte, Alessandra Chaves, Willandia A. Borges, Luiz Henrique Medeiros Silva, Antônia I. A. Santos-Fita, Dídac Silva, Tiago Lucena Lopes-Filho, Isaac Ibernon Silva, Maria Isabel Afonso Barreto, Rebeca Mascarenhas Fonseca Oliveira, Marcela A Ferreira, Felipe Silva Santos, Ricardo Rodrigues Honorato-Júnior, Jaime Brazil, Marilene Vasconcelos Silva Sousa, Shirliane Araújo Oliveira, Deise C. L. Ferreira, Valéria R. F. Soares, Hyago K. L. Pinto, Marcia F. Beltrão-Mendes, Raone Rodrigues, Marcos Paulo Lopes Rocha, Wáldima Alves Gutiérrez Poblete, Roberto Schettini, Francisco Luigi Rojas, Joe S. S. Aspilcueta, Marco A. Zevallos, Justo D. V. Gagliardi-Urrutia, Giussepe Menéndez Delgado, Erick Rodolfo Polit-Vera, Mariela Lissette Rodríguez Ríos, Elvira Carrascal Velásquez, Juan Carlos Forlano Riera, Maria Dalila Perera Romero, Lucy Salas Dueñas, Danilo A. Garin, Daniel Mayor, Pedro Instituto de Desenvolvimento Sustentável Mamirauá GP Ecologia de Vertebrados Terrestres Estrada do Bexiga Amazonas Tefé 258469553 - 225 Brazil Calle Enrique Granados 30 Boadilla del Monte Madrid 28660 Spain Departamento de Saúde Coletiva e Nutrição Centro de Ciências da Saúde Universidade Federal do Rio Grande do Norte Lagoa Nova Rio Grande do Norte Natal 59075000 Brazil University of Florida Gainesville 32611 FL United States School of Science Engineering and Environment University of Salford 43 Crescent Salford M5 4 WT United Kingdom Center for International Forestry Research - CIFOR Bogor Indonesia Department of Nutrition Centre of Health Sciences Universidade Federal da Paraíba R. Tabeliao Estanislau Eloy S/N Paraiba João Pessoa 58050585 Brazil Natural Sciences Faculty of Science and Engineering Manchester Metropolitan University Chester Street Manchester M15 6BH United Kingdom Natural Sciences and Environment Research Hub University of Gibraltar Gibraltar Gibraltar Department of Geography University College London North West Wing Gower Street London WC1E 6BT United Kingdom Institute of Health and Animal Production Federal Rural University of the Amazon Av. Presidente Tancredo Neves 2501 Pará Belém 66077 - 830 Brazil Laboratory of Animal Health Postgraduate Program in Animal Health in the Amazon Institute of Veterinary Medicine Federal University of Pará Universidade Federal do Pará (UFPA) BR 316 Km 61 s/n bairro Saudade II Pará Castanhal 68746360 Brazil Programa de Pós-Graduação Em Agroecossistemas (PPGSI) Universidade Tecnológica Federal Do Paraná (UTFPR) Prolongamento da Rua Cerejeiras S/N Paraná Santa Helena 85892000 Brazil Department of Fish and Wildlife Conservation Virginia Polytechnic Institute and State University 310 West Campus Drive Blacksburg 24061 VA United States Associação SOS Amazônia Rua Pará 61 Acre Rio Branco 69905082 Brazil Universidade Federal do Amazonas Instituto Natureza e Cultura Rua 1º de Mai

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifications, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how different socio-economic groups were affected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South America. We employed the Food Insecurity Experience Scale developed by the FAO. Our results showed that pre-pandemic, 4.5% of the sampled population across the entire continent faced Moderate FI, while 0.6% experienced severe FI. During the pandemic, Moderate FI increased to 16.9% (+ 12.4%), and Severe FI to 2.7% (+ 2.1%). By country, pre-pandemic households in Venezuela had the highest prevalence of Moderate FI (9.7%), with Peru experiencing the highest Severe FI frequency (1.1%). Peru had the greatest rise in Moderate (+ 23.9%) and Severe FI (+ 4.6%) during the pandemic. Low-income households, defined as those earning < 2 minimum wages per month, were most susceptible to FI. Uruguayan low-income families exhibited the most significant rise (+ 40.4%) in Moderate FI, while those in Peru experienced an increase of + 9.1% in Severe FI. This study measures the profound and far-reaching impact of the COVID-19 pandemic on FI in South America. Our findings also emphasise the critical importance of implementing effective public policy interventions to improve resilience against future shocks. This would enable policymakers to develop targeted strategies that address the immediate challenges posed by pandemics as well as laying the groundwork for a more resilient and sustainable food security landscape in the region. © The Author(s) 2025.

关键词： Covid-19 Food security Hunger Nutrition South America

来源：评论

学校读者我要写书评

暂无评论

Gold Nanoparticle Decorated Bismuth Vanadate Casting on Screen-Printed Electrode for Chlortetracycline Detection in Tap Water

SSRN

引用

SSRN 2024年

作者： Ngo, Duy Ba Gopi, Praveen Kumar Rajkumar, Muniyandi Chen, Shen-Ming Rijiravannich, Patsamon Khownarumit, Porntip Somasundrum, Mithran Surareungchai, Werasak Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Analytical Sciences and National Doping Test Institute Mahidol University Rama VI Rd. Bangkok10400 Thailand Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East Rd. Taipei106 Taiwan Bioscience and System Biology Research Team National Center for Genetic Engineering and Biotechnology National Sciences and Technology Development Agency at KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Pilot Plant Development and Training Institute KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Nanoscience and nanotechnology graduate program Faculty of Science KMUTT Pracha Uthit Rd. Bangkok10140 Thailand PSG College of Arts and Science Civil Aerodrome Post Tamil Nadu Coimbatore641014 India Quarter 6 Linh Trung Ward Thu Duc City Ho Chi Minh City720400 Viet Nam

Background Chlortetracycline (CTC) belongs to the class of tetracycline’s compounds, which is known for its antibacterial activity. CTC was largely consumed by farm animals than humans, which leads to the growth antibiotic – resistant bacteria and environmental contamination. So far no one reported the electrochemical detection and determination of CTC by using AuNPs@BiVO4 composite. Some reports have been reported using conventional chromatography which is most expensive, time-consuming and highly equipped method. Results Here, we report a simple method for preparing gold nanoparticle decorated bismuth vanadate (AuNPs@BiVO4), which was dropped cast on a screen-printed carbon electrode (SPCE). The AuNPs@BiVO4 and AuNPs@BiVO4/SPCE materials were characterized using TEM, SEM-EDX, XPS, DLS, ELS, EIS, and CV. The as-prepared AuNPs@BiVO4/SPCE was used to detect and determine chlortetracycline (CTC) by different pulse potentials in phosphate buffer pH 7.0. The electrode possessed a wide linear range of 0.99 – 19.06 µM, with obtained LOD = 0.15 µM, LOQ = 0.49 µM, and sensitivity = 0.059 μA μM-1 cm-2. It also exhibited good selectivity, stability, and repeatability, recovering 87.14% - 100% for detecting CTC in Mili Q and tap water. Significance Facile and rapid synthesis of AuNPs@BiVO4 nanocomposite film modified electrode at physiological pH conditions has been prepared and A highly electrochemical detection and determination of CTC using AuNPs@BiVO4 nanocomposite film has been developed for the first time. Thus, the proposed electrode could be applied for the detection and determination of CTC in water sources and has the potential to be used for real sample analysis. © 2024, The Authors. All rights reserved.

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Retraction: Implementation Method CUSUM To Determine The Accident Prone Areas in Web Based (J. Phys.: Conf. Ser. 1114 012093)

引用

Journal of Physics: Conference Series 2018年第1期1114卷

作者： Rozzi Kesuma Dinata Dahlan Abdullah H Hartono Cut Ita Erliana Berliana Kusuma Riasti Akbar Iskandar Ifit Novita Sari Nurmawati Ricardo Freedom Nanuru Lusi Dwi Putri Rosida Tiurma Manurung S. Sriadhi A A Saleh T Astari Muammar Khaddafi Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Computer Science STMIK IBBI Medan Indonesia Department of Industrial Engineering Universitas Malikussaleh Aceh Indonesia Department of Informatics Universitas Sebelas Maret Surakarta. Indonesia Department of Informatics STMIK AKBA Makassar Indonesia Departement of: Social Science Education Program Post Graduate Program Universitas Kanjuruhan Malang Malang Indonesia Faculty of industry Technique University of 45 Surabaya Indonesia Universitas Kristen Indonesia Maluku Ambon Indonesia Department of Civil Engineering Universitas Lancang Kuning Pekanbaru Indonesia Graduate Program in Scientific Psychology Universitas Kristen Maranatha Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia Statistics Financial & Social Sciences Research Group Indonesia Department of Elementary School Teacher Education STKIP Citra Bangsa Aceh Utara Aceh Indonesia Department of Accounting Universitas Malikussaleh Aceh Indonesia

This paper was retracted by IOP Publishing on 12 December 2018. This paper was published due to a technical error and was not intended to be included in this journal. Retraction published: 8 February 2019

关键词：

来源：评论

学校读者我要写书评

暂无评论

Implementation Method CUSUM To Determine The Accident Prone Areas in Web Based

引用

Journal of Physics: Conference Series 2018年第1期1114卷

At the Unit Laka Lantas Polres Lhokseumawe determining accident-prone areas on roads in Lhokseumawe still using manual systems. Determination of accident-prone areas are less effective because the police Unit Laka Lantas Polres Lhokseumawe just using the data of the last year and had to repeatedly calculate manually accident-prone areas based on the number of human casualties. In this study the system implementation CUSUM method (Cummulative Summary) to determine the accident-prone areas designed using the web-based programming language PHP. In this system there are three processes to determine areas prone to accidents, the accident rate calculations based on the weighted severity, blacksite calculations using the Z-Score method for determining areas prone to accident blackspots and calculations using the CUSUM method to determine the critical points of an accident. The data used are secondary data obtained from the Police Unit Laka Lantas Polres Lhokseumawe years 2009-2013.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Effects of TiO 2 waste on the formation of clinker phases and mechanical performance and hydration of Portand cement

引用

CEMENT 2022年 9卷

作者： José S. Andrade Neto Bruna B. Mariani Nilson S. Amorim Júnior Daniel V. Ribeiro Laboratory of Testing on Materials Durability (LEDMa) / Federal University of Bahia Rua Aristides Novis 02. Federação. 40210-630. Salvador/BA Brazil Post-Graduate Program in Civil Engineering (PPEC) / Federal University of Bahia Aristides Novis 02. Federação. 40210-630. Salvador/BA Brazil Department of Materials Science and Technology / Federal University of Bahia Aristides Novis 02. Federação. 40210-630. Salvador/BA Brazil

The incorporation of different levels of UOW into Portland clinker raw meals and its effects on the clinker and cement properties were evaluated. Clinkers were produced and characterized by X-ray diffractometry (XRD) and optical microscopy; the cements were produced and physically characterized. Finally, pastes were produced and analyzed using isothermal calorimetry, thermogravimetry, XRD, and compressive strength tests. UOW, when added up to 1.29% in Portland clinker raw meal, acts as a mineralizer, increasing the content of alite by 6.44%. The incorporation of UOW reduces the hydration rate in the first days owing to the increase in the size of the alite crystals and delays the point of sulfate depletion due to the increase in the SO 3 content of the clinkers. Owing to the higher content of alite formed, the cement produced from the raw meal with 1.29% of UOW presents the highest early mechanical strength (up to 7 days).

关键词： Portland clinker Unreacted ore waste (UOW) Mineralizer Hydration

来源：评论

学校读者我要写书评

暂无评论

Optimization of parameters in biomethanization process with co-digested poultry wastes and palm oil mill effluents

引用

Cleaner Chemical engineering 2022年 3卷

作者： Emmanuel Ikechukwu Ugwu Juliana Heloisa Pinê Américo-Pinheiro Light Ihenna Nwobia Vineet Kumar Eberechukwu Laura Ikechukwu Egba Chinonso Victor Department of Civil Engineering Michael Okpara University of Agriculture Umudike P.M.B 7267 Umuahia Abia State Nigeria Post-graduate Program in Environmental Sciences Brazil University Street Carolina Fonseca 584 São Paulo SP 08230-030 Brazil Department of Botany School of Life Sciences Guru Ghasidas Vishwavidyalaya (A Central University) Bilaspur Chhattisgarh 495009 India Department of Biochemistry Michael Okpara University of Agriculture Umudike P.M.B 7267 Umuahia Abia State Nigeria

Poultry wastes (PW) and palm oil mill effluents (POME) are thought to be promising starting materials for biogas production. In the present study, the optimization of biomethanization process from co-digested (PW) and POME was investigated. To assist digestion, samples were sun-dried, ground, and mixed with water to form slurry. The central composite design was used in the experimental design, while the desirability function was applied in the process optimization of the co-digestion process. The interactive effects of temperature, pH, and hydraulic retention time were equally studied. The results showed a high co-efficient of determination (R 2 ) value of 0.9920. Also, the predicted and experimental values obtained were 4377.71 ml and 4379.01 respectively, while the optimum conditions obtained were 45 °C, 8.00 and 15 days for temperature, pH, and hydraulic retention time, respectively. This finding shows that the proposed technique is effective and robust in predicting biomethane generation from co-digested POME and PW.

关键词： Biogas yield Bio-methanization Central composite design Co-digestion Co-efficient of determination Interactive effects Process optimization

来源：评论

学校读者我要写书评

暂无评论

THE STRUCTURAL SYNTHESIS DESIGN program - ITS IMPACT ON THE FLEET

引用

NAVAL ENGINEERS JOURNAL 1983年第3期95卷 87-99页

作者： WIERNICKI, CJ GOODING, TG NAPPI, NS Mr. Christopher J. Wiernicki:graduated from Vanderbilt University in 1980 with a B.E. degree in Structural Engineering. Upon graduation he began his professional career at the David Taylor Naval Ship Research and Development Center. As a structural engineer in the Surface Ship Structures Division Mr. Wiernicki was responsible for developing improved methods and procedures for designing and evaluating structural systems for surf ace combatants. Specific projects included design for producibility development and evaluation of automated ship structural design methods and participation in the structural design of the CG 49 Cruiser and the current DDG 51 Destroyer. In 1982 Mr. Wiernicki received his M.S. degree in Ocean Engineering from George Washington University. Mr. Wiernicki is a recipient of the SNAME 1982-82 Graduate Scholarship and is currently doing post graduate work in Naval Architecture at Massachusetts Institute of Technology he is a member of ASNE SNAME ASCE and Chi Epsilon. Mr. Thomas G. Gooding:graduated in 1975 from the University of Michigan with B.S. degrees in Oceanography and Naval Architecture. After graduation he began his professional career at the Naval Ship Engineering Center (NA VSEC) as a structural engineer. From 1975 till 1978 Mr. Gooding worked in the area of ship dry docking and was the structural task leader on the complex overhaul ofUSS Long Beach (CGN-9). Mr. Gooding returned to the University of Michigan to receive a M.S. in Naval Architecture in 1979. Currently Mr. Gooding is the structural task leader on the DDGX/DDG 51 program at the Naval Sea Systems Command (NAVSEA). Mr. Gooding is a member of SNAME and the Naval Institute. Mr. Natale S. Nappi:graduated from City College of New York in 1954 with a Bachelor of Civil Engineering and received his M.S. in Civil Engineering from Polytechnic Institute of Brooklyn in 1959. He began his professional career in 1964 at the New York Naval Shipyard as a Naval Architect (Structure) performing detail structural design and fabrication s

The structural design of a ship's section is a complicated, repetitive and time consuming task. With the advent of new technology, high speed computers have enabled the ship designer to accomplish in a matter of seconds what would formerly take days to accomplish by hand. The Structural Synthesis Design program (SSDP) is a N avy developed computer-aided design tool which is used to design (or to analyze) the longitudinal scantlings for a variety of ship cross sections, consisting of any practical combinations of decks, platforms, bulkheads and materials, i.e., various steel and aluminum alloys. The final hull section design will have the lowest practical weight for the chosen geometric configuration, structural arrangements, and imposed loadings. The scantling developed by the program will satisfy all U.S. N avy ship structural design criteria. An explanation of the objective and design elements of N avy ship structures is included. The rationale behind the SSDP design philosophy is developed along with the significant program capabilities. In an attempt to highlight the influence of automated design procedures on the current naval ship design process, the effect of the SSDP on the DDG 51 destroyer structural development is addressed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：