Stabilization of Soil Arsenic with Iron and Nano-Iron Materials: A Review

2021 ◽  
Vol 21 (1) ◽  
pp. 10-21
Author(s):  
Changsheng Yue ◽  
Huili Du ◽  
Yan Li ◽  
Naiyi Yin ◽  
Ben Peng ◽  
...  
Keyword(s):  
Chemical Stabilization ◽  
Environmental Friendliness ◽  
Factors Affecting ◽  
Binary Oxides ◽  
Soil Arsenic ◽  
Coprecipitation Process ◽  
Iron Iron ◽  
High Reduction ◽  
Capacity Cost ◽  
Reduction Capacity

Soil arsenic (As) contamination is an important environmental problem, and chemical stabilization is one of the major techniques used to remediate soil As contamination. Iron and iron nanoparticle materials are widely used for soil As stabilization because they have one or more of the following advantages: high adsorption capacity, high reduction capacity, cost effectiveness and environmental friendliness. Therefore, this review introduces the stabilization of soil As with iron and iron nanoparticles, including zero-valent iron, iron oxides/hydroxides, some iron salts and Fe-based binary oxides and the nanoparticles of these iron materials. The mechanism of chemical soil As stabilization, which involves adsorption and the coprecipitation process, is discussed. The factors affecting the chemical stabilization process are presented, and challenges to overcome in the future are also discussed in this review.

Study on damping characteristic of honeycomb paperboard and vibration reduction mechanism of packaging system

2019 ◽  
Vol 25 (9) ◽  
pp. 1536-1542 ◽  
Author(s):  
Dongmei Wang ◽  
Rui Yang
Keyword(s):  
Vibration Reduction ◽  
Cell Length ◽  
Face Sheet ◽  
Damping Capacity ◽  
Reduction Mechanism ◽  
Packaging System ◽  
Environmental Friendliness ◽  
Paper Honeycomb ◽  
Compression Resistance ◽  
Reduction Capacity

Honeycomb paperboard has been widely used in transportation and packaging of electronic instruments and furniture owing to the advantages of light weight, good compression resistance, environmental friendliness, and easy degradation. As a common cushioning material in transportation, it is worth studying the damping characteristic and vibration reduction mechanism of honeycomb paperboard. Based on the basic principles of vibration mechanics, the damping of honeycomb paperboard was proposed. Then the influences of cell length, paperboard thickness, grammage of core paper, and the honeycomb structures with face sheet or without face sheet on the damping characteristic of honeycomb paperboard were analyzed. Finally, the vibration reduction mechanism of packaging system with honeycomb paperboard and block was discussed briefly. The results show that the damping value of honeycomb paperboard decreases with the increase of cell length and paperboard thickness. The honeycomb paperboard with large grammage of core paper has high damping value, and yet paper honeycomb core structure without face sheet has poor damping capacity. What's more, the vibration reduction capacity of packaging system is influenced by the deformation and damping characteristic of honeycomb paperboard, among which material damping and structural damping contribute more, honeycomb deformation and air damping contribute less. The weight of block does not affect the damping characteristic of honeycomb paperboard, but affects the vibration reduction capacity of the whole system.

Serum pro-hepcidin concentrations and their responses to oral iron supplementation in healthy subjects manifest considerable inter-individual variation

2006 ◽  
Vol 44 (11) ◽  
Author(s):  
Susanna Luukkonen ◽  
Kari Punnonen
Keyword(s):  
Individual Variation ◽  
Healthy Subjects ◽  
Serum Iron ◽  
Iron Supplementation ◽  
Iron Homeostasis ◽  
Normal Serum ◽  
Serum Samples ◽  
Physiological Factors ◽  
Factors Affecting ◽  
Iron Iron

AbstractHepcidin participates in the regulation of iron homeostasis and its precursor pro-hepcidin can be measured in serum. We evaluated pro-hepcidin serum concentrations in healthy subjects and the possible effects of iron supplementation on the results. The results suggest extensive physiological variation in serum pro-hepcidin concentrations between healthy subjects with no symptoms or signs of anaemia, infections, inflammations, chronic disease or other interpretative factors. Before pro-hepcidin measurements can be used in clinical practise, further investigations are required to identify the physiological factors affecting normal serum pro-hepcidin variations in healthy subjects. The responses of serum pro-hepcidin to a 100-mg oral dose of iron also showed considerable inter-individual variation. In male subjects, no systematic changes in serum pro-hepcidin concentrations were found and the increase in serum iron was fairly modest. In nine out of the ten female subjects who had rather low amounts of storage iron, iron supplementation was followed by an increase in both serum iron and serum pro-hepcidin concentrations. There were considerable inter-individual differences in the timing and magnitude of the response. We also evaluated the conceivable influences of sample storage and freeze-thaw cycles on the results of serum pro-hepcidin ELISA. We did not observe any changes in the results after serum samples were frozen and thawed up to four times and/or stored at room temperature for up to 6h.Clin Chem Lab Med 2006;44:1361–2.

scholarly journals Tüketicilerin Sosyo-ekonomik Nitelikleri ile Çevre Bilinci Düzeyleri Arasındaki İlişki ve Çevre Dostu Gıda Ürünlerini Satın Almalarında etkili olan Faktörler

2021 ◽  
Vol 9 (7) ◽  
pp. 1297-1303
Author(s):  
Yusuf Çakmakçı ◽  
Harun Hurma
Keyword(s):  
Environmentally Friendly ◽  
Food Products ◽  
Point Of View ◽  
Legal Regulations ◽  
Chi Square ◽  
Environmental Friendliness ◽  
Frequency Distributions ◽  
Factors Affecting ◽  
Label Information ◽  
Data Frequency

This study examined whether there is a relationship between the socio-economic and demographic characteristics of consumers while purchasing food products and the level of environmental awareness and environmental consciousness. In addition, the factors affecting consumers' trust in environmentally friendly food products were examined. The data of the study were obtained from the questionnaires made with 171 people in the district of Süleymanpaşa in Tekirdağ. In the evaluation of the obtained data, frequency distributions, chi-square, and factor analyses were used. In the results of the research, it determined that the level of environmental friendliness of consumers in their general consumption habits differs according to their age, education, having children under the age of 10, monthly income level, monthly food expenditure level. Consumers over the age of 36 were found to be more environmentally sensitive than other consumers. Similarly, consumers with undergraduate and higher education were found to be more environmentally friendly than those who have under undergraduate education. On the other hand, factor analysis was applied to 11 variables that affect the confidence level of consumers for food products produced with environmentally friendly and human health sensitive production methods. 11 variables were grouped under 3 factors as “Legal regulations and promotion efforts”, “Certificates and label information” and “Product awareness”. When evaluated from this point of view, it revealed that certificates and label information are very important as well as legal regulations in increasing the reliability of environmentally friendly food products in the eyes of consumers. However, it is understood that the environmental attitudes of consumers should also be taken into account in consumer-oriented studies in the food products market today.

scholarly journals INCREASING THE ECOLOGICAL LEVEL OF PUBLIC TRANSPORT IN THE CITY OF SOFIA

2020 ◽  
Vol 1 ◽  
pp. 57-61
Author(s):  
Iliya Gatovski
Keyword(s):  
Rolling Stock ◽  
Transport Sector ◽  
Environmental Friendliness ◽  
Factors Affecting ◽  
Research And Innovation ◽  
Alternative Sources ◽  
Major Factors ◽  
The Cost ◽  
The City ◽  
Bus Transport

The paper explores some of the major factors affecting the environmental friendliness of urban bus transport, with a focus of the modernization of rolling stock and alternative sources of fuel. The surveys are based on an 11-year period, from 2008 to 2019, for which an analysis was made of how much emission reductions in buses with a higher Euro standard are being followed, as in the case of Sofia Motor Transport EAD in Sofia, Bulgaria. As a result, we conclude that transport research and innovation are crucial to ensuring fast, safe and clean transport for citizens and businesses in big cities. The transport sector is more than ever in need of innovative solutions, as the cost of transporting passengers will increase in value and time. This is especially urgent for Bulgaria as the available rolling stock is outdated and in need of renovation.

scholarly journals A NANOCOMPOSITE BASED ON MICROBIAL SYNTHESIS OF HUMIC PRECURSORS AND OF METAL NANOPARTICLES USED AS AN ANTIMICROBIAL COMPOUND IN SOIL

2019 ◽  
Vol 13 (2) ◽  
pp. 201-210
Author(s):  
Sorin Matei ◽  
Gabi-Mirela Matei ◽  
Gina Cogălniceanu ◽  
Alexandru Brînzan
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Antimicrobial Agents ◽  
Antimicrobial Effect ◽  
Microbial Consortia ◽  
Biochemical Processes ◽  
Mobile Fraction ◽  
High Reduction ◽  
Reduction Capacity

Soil humic precursors could be considered the most active and mobile fraction and are highly significant to a series of biochemical processes in all types of soil. The microbial biosynthesized humic precursors attracted increasing attention on green synthesis of nanocomposite compounds realized between biopolymers and metal nanoparticles. Silver nanoparticles are the most used engineered nanocomposite serving as antimicrobial agents. In the present study we used aqueous solution of humic precursors synthesized by four microbial consortia (C1-C4) and selected on the basis of high quantities of exometabolites with structural similarities to soil humic acid fraction. The humic precursors were used as capping agents of silver nanoparticles in the nanocompozite synthesis. Biosynthesized humic precursors act as reductive and stabilizative agents of nanoparticles which are found between 5-300nm in size and with spherical preponderant shape. The presence of humus precursors and the biosynthesized silver nanoparticles was confirmed by FTIR and UV-Vis. At a given precursor concentration, the efficiency of nanocomposite synthesis increased with particle concentration and time of reaction, property which can be attributed to the high reduction capacity of humic precursors. The induced antimicrobial effect of exposure to nanocomposites differs due to the size, time of preparation and stability. Stabilization of nanocomposite by specific metal-ligand bonds was obtained in the solution for three months without any precipitate. The antimicrobial effect of nanocomposites was estimated under laboratory agar well diffusion tests against mycotoxigenic soil fungal isolate Aspergillus niger (A27). The green synthesis of nanocomposite material with the best antimicrobial effect against test fungus was realized by microbial consortium C3and C4.

scholarly journals Does Information about Personal Emissions of Carbon Dioxide Improve Individual Environmental Friendliness? A Survey Experiment

2021 ◽  
Vol 13 (4) ◽  
pp. 2284
Author(s):  
Hideki Yamashita ◽  
Shinsuke Kyoi ◽  
Koichiro Mori
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Co2 Emissions ◽  
Threshold Value ◽  
Survey Experiment ◽  
Environmental Friendliness ◽  
Factors Affecting ◽  
Carbon Dioxide Co2 ◽  
Aggregate Amount ◽  
And Behavior

The purpose of this study is to identify factors that can change the environmental friendliness of individuals in the context of climate change issues in terms of values, beliefs, controllability, concern, attitude, intention, and behavior through a survey experiment, and to test the hypothesis that providing information about the amount of carbon dioxide (CO2) emissions attributable to an individual with its threshold value motivates him/her to reduce that amount using statistical analyses (the Mann–Whitney test) and multivariate regressions (the ordered logit model). It is crucial to change the behavior of individuals as well as organizations to reduce the emissions of CO2 for solving climate change issues, because the aggregate amount of individual CO2 emissions is too large to ignore. We conducted a survey experiment to detect factors affecting the environmental friendliness of individuals. Subjects of the experiment were 102 students at Shiga University in Japan. They were randomly provided with communication opportunities, information about individual or group CO2 emissions, and information about their threshold value. The finding is that provision of information about the amount of individual and group CO2 emissions may be able to improve that person’s environmental friendliness in terms of values, beliefs, concern, attitude, intention, and behavior.

scholarly journals A STUDY ON THE FACTORS CONSIDERED BY BUYERS WHILE PURCHASING ECO-FRIENDLY HOMES

2021 ◽  
pp. 641-644
Author(s):  
Mrs. Sanjeevani Pandey
Keyword(s):  
Global Warming ◽  
Empirical Study ◽  
Carbon Footprint ◽  
Selection Criteria ◽  
Rainwater Harvesting ◽  
Statistical Tool ◽  
Environment Friendly ◽  
Environmental Friendliness ◽  
Factors Affecting ◽  
Energy Plants

Home buying is a very thought-intensive process that entails several factors like budget, locality, amenities, commutation & communication facilities etc. Lately, along with these factors, there has been a sought after “Environmental Friendliness & Sustainability of Homes”. People have started looking for properties that are built with a eco-friendly approach, such that it gave rise to a new niche of homes in the arena of homebuying called “Eco-Friendly Houses”. An Eco-Friendly House, or an Eco-House as it is called, is basically a low-impact & environment friendly construction built with the intent of lessening pollution, reducing the carbon footprint, & thus global warming contribution, of the property, & having a sustainable endurance. To study the factors that influence purchase of Eco-Houses, 478 eco-home buyers were interviewed, out of which the researcher with 430 respondents, conducted an empirical study using percentage analysis as a statistical tool and concluded that there are various factors affecting the selection criteria out of which the most effective ones are features of eco-homes like solar energy plants & wind turbines, rainwater harvesting, planting trees & saplings all across the premises of then property.

Sign in / Sign up

Export Citation Format

Share Document