Release Text on the Humus Soil Pellets

2012 ◽  
Vol 610-613 ◽  
pp. 3096-3101
Author(s):  
Jun Yin ◽  
Lei Wu ◽  
Zhi Sheng Liu ◽  
Jian Hui Wang ◽  
Hai Lu ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Complex Structure ◽  
Chemical Properties ◽  
Hydroxyl Groups ◽  
High Concentration ◽  
Weight Percentage ◽  
Highly Active ◽  
Oxygen Conditions ◽  
Physical And Chemical ◽  
Humus Soil

In this article, texted the humus soil pellets by means of SEM-EDAX. Analyze the release of organic matter at different dissolved oxygen conditions and the content of TOC changes after being used for different duration. Systematically studied on the physical and chemical properties of the filler and it’s released highly active organic nutrient composition. Further reveals the principle of humus activated sludge process how to deal with the high concentration organic wastewater. The results show that the humus soil pellets has a complex structure and irregular, containing large quantities of animal bone debris and plant fragments, and its main elements are C, Si, O. Three elements of the weight percentage reached 88.69%, atomic hundreds of content reached 93.52%.The humus soil pellets released organic substances at different dissolved oxygen conditions are different. Released substance under low dissolved oxygen conditions are mostly short-chain polar organic functional groups such as methyl, carboxyl and hydroxyl groups.

scholarly journals Potential of Biochar Derived from Agricultural Residues for Sustainable Management

2021 ◽  
Vol 13 (15) ◽  
pp. 8147
Author(s):  
Sasiwimol Khawkomol ◽  
Rattikan Neamchan ◽  
Thunchanok Thongsamer ◽  
Soydoa Vinitnantharat ◽  
Boonma Panpradit ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Agricultural Residues ◽  
Hydroxyl Groups ◽  
Asian Countries ◽  
Heating Value ◽  
Coconut Husk ◽  
High Heating Value ◽  
Horizontal Drum ◽  
Physical And Chemical ◽  
And Chemical Properties

A horizontal drum kiln is a traditional method widely used in Southeast Asian countries for producing biochar. An understanding of temperature conditions in the kiln and its influence on biochar properties is crucial for identifying suitable biochar applications. In this study, four agricultural residues (corncob, coconut husk, coconut shell, and rice straw) were used for drum kiln biochar production. The agricultural residues were turned into biochar within 100–200 min, depending on their structures. The suitability of biochar for briquette fuels was analyzed using proximate, ultimate, and elemental analysis. The biochar’s physical and chemical properties were characterized via bulk density, iodine number, pHpzc, SEM, and FTIR measurements. All biochars had low O/C and H/C ratios and negative charge from both carbonyl and hydroxyl groups. Coconut husk and shell biochar had desirable properties such as high heating value and a high amount of surface functional groups which can interact with nutrients in soil. These biochars are thus suitable for use for a variety of purposes including as biofuels, adsorbents, and as soil amendments.

scholarly journals Waste Tire Particles and Gamma Radiation as Modifiers of the Mechanical Properties of Concrete

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Eduardo Sadot Herrera-Sosa ◽  
Gonzalo Martínez-Barrera ◽  
Carlos Barrera-Díaz ◽  
Epifanio Cruz-Zaragoza
Keyword(s):  
Mechanical Properties ◽  
Gamma Radiation ◽  
Chemical Properties ◽  
Plain Concrete ◽  
Cement Matrix ◽  
Portland Cement Concrete ◽  
High Concentration ◽  
Good Tool ◽  
Waste Tire ◽  
Physical And Chemical

In polymer reinforced concrete, the Young’s modulus of both polymers and cement matrix is responsible for the detrimental properties of the concrete, including compressive and tensile strength, as well as stiffness. A novel methodology for solving such problems is based on use of ionizing radiation, which has proven to be a good tool for improvement on physical and chemical properties of several materials including polymers, ceramics, and composites. In this work, particles of 0.85 mm and 2.80 mm obtained from waste tire were submitted at 250 kGy of gamma radiation in order to modify their physicochemical properties and then used as reinforcement in Portland cement concrete for improving mechanical properties. The results show diminution on mechanical properties in both kinds of concrete without (or with) irradiated tire particles with respect to plain concrete. Nevertheless such diminutions (from 2 to 16%) are compensated with the use of high concentration of waste tire particles (30%), which ensures that the concrete will not significantly increase the cost.

Physical and Chemical Deterioration of Reinforced Concrete Reefs in Tongyeong Reefs Coastal Waters, Korea

2008 ◽  
Vol 42 (3) ◽  
pp. 110-118 ◽  
Author(s):  
H. S. Kim ◽  
C. G. Kim ◽  
W. B. Na ◽  
J. Woo ◽  
J. K. Kim
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Dissolved Oxygen ◽  
Extreme Event ◽  
Chemical Properties ◽  
Chloride Concentration ◽  
Concrete Cover ◽  
Marine Habitat ◽  
Seawater Salinity ◽  
Physical And Chemical

As part of a marine habitat enhancement project, the physical and chemical deterioration of reinforced concrete reefs that were fully immersed in Tongyeong waters of Korea was investigated. For the investigation, marine environmental factors such as seawater, salinity, pH, dissolved oxygen, sea-bottom materials, and water depth of the targeted sites were surveyed from 1997 to 2001. Then, four reinforced concrete reefs from four different sites were recovered and tested by using various destructive and nondestructive methods. Based on the observations and test results, it was seen that the reinforced concrete reefs have sound physical and chemical properties, except for chloride concentration and its associated factors. However, because of the lack of dissolved oxygen in the targeted seawaters and its continuous supply, it is concluded that the originally designed service life will be achieved, and in fact the concrete reefs will have an even longer service life than expected. By considering an extreme event such as impact loading under installation and construction, a new minimum concrete cover depth of 40 mm is introduced into practice.

scholarly journals Surface microtopography modulates sealing zone development in osteoclasts cultured on bone

2017 ◽  
Vol 14 (127) ◽  
pp. 20160958 ◽  
Author(s):  
Michal Shemesh ◽  
Lia Addadi ◽  
Benjamin Geiger
Keyword(s):  
Dynamic Properties ◽  
Complex Structure ◽  
Chemical Properties ◽  
Bone Diseases ◽  
Bone Homeostasis ◽  
Native Bone ◽  
Surface Microtopography ◽  
Significant Enrichment ◽  
Sealing Zone ◽  
Physical And Chemical

Bone homeostasis is continuously regulated by the coordinated action of bone-resorbing osteoclasts and bone-forming osteoblasts. Imbalance between these two cell populations leads to pathological bone diseases such as osteoporosis and osteopetrosis. Osteoclast functionality relies on the formation of sealing zone (SZ) rings that define the resorption lacuna. It is commonly assumed that the structure and dynamic properties of the SZ depend on the physical and chemical properties of the substrate. Considering the unique complex structure of native bone, elucidation of the relevant parameters affecting SZ formation and stability is challenging. In this study, we examined in detail the dynamic response of the SZ to the microtopography of devitalized bone surfaces, taken from the same area in cattle femur. We show that there is a significant enrichment in large and stable SZs (diameter larger than 14 µm; lifespan of hours) in cells cultured on rough bone surfaces, compared with small and fast turning over SZ rings (diameter below 7 µm; lifespan approx. 7 min) formed on smooth bone surfaces. Based on these results, we propose that the surface roughness of the physiologically relevant substrate of osteoclasts, namely bone, affects primarily the local stability of growing SZs.

Structural Defect Formation in Inorganic Sol-Gel Derived Oxides

2005 ◽  
Vol 242-244 ◽  
pp. 143-158 ◽  
Author(s):  
Elena V. Frolova ◽  
Mariya I. Ivanoskaya
Keyword(s):  
Defect Formation ◽  
Complex Structure ◽  
Sol Gel ◽  
Chemical Properties ◽  
Reduction Process ◽  
Molar Ratios ◽  
Glass Forming ◽  
Structural Peculiarities ◽  
Complex Metal Oxides ◽  
Physical And Chemical

The advantages and uniqueness of the Inorganic modification of the Sol-Gel method have already been described. Homogeneous nano-composites as well as some exotic glasses, complex-metal-oxides systems with little glass-forming ability, can be produced by this method. Thus, the obtained materials are characterized by a complex structure that leads to the wide variety of physical and chemical properties. Zirconia-containing materials are of utmost interest because of the mechanical toughness and chemical resistance provided by the presence of ZrO2. In the present work, we report on unusual structural peculiarities of the Zr-O, two types of Zr-Ge-O systems (with Zr>Ge and Zr<Ge molar ratios) and Zr-Ce-Al-O glassy samples, successfully prepared by inorganic modification of the Sol-Gel technique. We tried to elucidate the cause of a self-reduction process in those oxides systems under thermal treatment in air and the way in which structural imperfections impact upon some properties of the materials obtained.

Preparation of Calcium Oxide/Zeolite Nanocomposite and its Application to Improve the Quality of Patchouli Oil

2020 ◽  
Vol 849 ◽  
pp. 119-124
Author(s):  
Karna Wijaya ◽  
Maisari Utami ◽  
Akhmad Syoufian ◽  
Luthfan Hidayatullah
Keyword(s):  
Chemical Properties ◽  
Acid Number ◽  
National Standard ◽  
Highly Active ◽  
Oil Purification ◽  
The Fourier Transform ◽  
State Mixing ◽  
Fluorescence Spectrometer ◽  
Physical And Chemical

The synthesis of CaO/zeolite nanocomposite as a highly active and effective adsorbent for patchouli oil purification has been developed. This research aims to improve the quality of patchouli oil by synthesizing CaO/zeolite nanocomposites using a solid-state mixing method. The used mass ratios of zeolite:CaO were 0:100, 20:80, 40:60, 60:40, 80:20 and 100:0 (w/w), then nanocomposites with various zeolite-to-CaO ratios were then calcined at various temperature of 300°C, 400°C and 500°C. The zeolite, CaO and nanocomposites were characterized by using the Fourier-transform infrared (FTIR), X-ray fluorescence spectrometer (XRF) and surface area analyzer (SAA). The nanocomposites were then applied to patchouli oil and the assessment results of physical and chemical properties of patchouli oil were determined according to Indonesian National Standard (SNI) 06-2385-2006. After patchouli oil purification using ZECA nanocomposite, the acid number decreased from 5.42 to 0.39 mg KOH/g oil, the patchouli alcohol (PA) content increased from 33.08 to 34.27% and the Fe level decreased from 1.39 to 0.31 ppm.

scholarly journals Diel vertical migration of Cladocera in a compartment of a tropical reservoir

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Erika dos Santos Silva ◽  
Odete Rocha ◽  
Maria José dos Santos-Wisniewski
Keyword(s):  
Dissolved Oxygen ◽  
Water Column ◽  
Chlorophyll A ◽  
Vertical Migration ◽  
Variable Temperature ◽  
Chemical Properties ◽  
Migration Pattern ◽  
Limiting Factor ◽  
Tropical Reservoir ◽  
Physical And Chemical

Abstract Aim This study seeks to analyze the vertical migration pattern of Cladocera species as related with the physical and chemical parameters of the water. Methods Samplings were carried out at 3-h intervals for 24 h in January 15 on the Sapucaí River compartment of Furnas reservoir, Minas Gerais State, Brazil. These samples were taken at five depths, from the surface to the near-bottom layer (0, 2, 4, 6, 8, and 9 m) totalizing 54 samplings for each limnological variable (temperature, pH, dissolved oxygen, electrical conductivity, chlorophyll-a content, Index of Trophic State, water transparency and Cladocera populations abundance). The samplings were performed at the limnetic region at a point with total depth of 9 meters. Results Water column thermal and chemical stratifications and thermocline occurrences were registered in the middle of the day. Among the 14 Cladocera species, only Ceriodaphnia cornuta and C. silvestrii displayed a significant migration pattern, which was mainly related to chlorophyll-a and dissolved oxygen concentrations. Diaphanosoma birgei and D. spinulosum are found at high densities near the surface and low ones in depth. The migration of Diaphanosoma was directly related to the concentration of chlorophyll a and pH, thus acting as a limiting factor. Feeding at high temperatures in the surface layer and assimilating at lower ones in depth, usually confer metabolic advantages to the vertically migratory species. Conclusions In this study, a well-defined pattern of vertical migration was found for two Cladocera species and its possible causes were hypothesized. To the species with less locomotory capacity, thermal and chemical stratifications can act as barriers to migration and distribution through the water column. This pattern may probably be found for zooplankton species in other compartments of Furnas reservoir, with similar physical and chemical properties.

Effect of Nickel on Living Organism and the Research Progress

2013 ◽  
Vol 726-731 ◽  
pp. 310-314
Author(s):  
Ming Da Liu ◽  
Xiao Ming Ji ◽  
Yao Jing Wang
Keyword(s):  
Growth And Development ◽  
Chemical Properties ◽  
Living Organism ◽  
Rare Metal ◽  
Research Progress ◽  
Physical And Chemical Properties ◽  
High Concentration ◽  
Relevant Research ◽  
Physical And Chemical ◽  
And Chemical Properties

Nickel is a kind of rare metal which is widely distributed in the earth's crust, and is mainly used in manufacturing alloy. Nickel is a trace element essential to animals and plants growth and development, but high concentration of nickel will hamper the growth of plants and animals, and even produce toxic effects. This paper summarizes the physical and chemical properties of nickel, the sources of organisms exposed to nickel and the influence of different concentrations of nickel on animal and plant, and summarizes the relevant research progress.

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