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Exchange capacity of water
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Due to its rising accumulation in the food chain and ongoing presence in ecosystems, metal contamination has piqued the curiosity of experts from all over the world. Environmentally hazardous heavy metal removal is being pursued utilizing a variety of techniques, such as ion exchange and precipitation, as well as chemical oxidation or reduction, electrochemistry, and filtration.
8p
vimulcahy
18-09-2023
6
3
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As a result, starch treated by solvent with different concentrations tended to form wrinkles and pore from the surface to the inside of the starch granules during ethanol immersion. Therefore, the oil and water holding capacity, solubility, swelling and viscosity of the solvent-treated starch samples increase as the concentration of ethanol increases.
8p
paddington36
04-01-2022
11
0
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In many places around the world, the fluoride concentration in ground water as raw water is higher than the threshold standard for healthy drinking water. The aim of this work is to study the characteristics of an anionic membrane that will be the subject of an application for defluoridation by electrodialysis. The first objective of this work is to evaluate the physicochemical characteristics of the membrane used in experiments by determination of the exchange capacity, water uptake, ionic conductivity, and transport number (Hittorf method).
11p
tudichquannguyet
29-11-2021
10
1
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An efficient and inexpensive monolithic stationary phase (PHEMA-HA) has been prepared through an easy process comprising addition of humic acid (HA) to a mixture of 2-hydroxyethyl methacrylate (HEMA) and N,N’- methylenebisacrylamide (MBAAm) and subsequent radical-polymerization at –20 ◦ C. The prepared monolithic material was characterized in terms of various techniques and methods such as elemental analysis, FTIR spectroscopy, scanning electron microscopy, mercury porosimetry, hydrolytic stability tests, pHpzc measurements, water-holding capacity, and water permeability.
16p
tudichquannguyet
29-11-2021
10
1
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This work reports the synthesis and properties of a new membrane based on polyvinyl chloride (PVC) grafting with polyacrylic acid (PAA) using argon (Ar) plasma. The membranes of PVC were synthesized by solutioncasting method, where PAA was deposited as an ultrathin film onto PVC using dielectric barrier discharge at atmospheric pressure with Ar gas. The surface characteristics and chemical composition of the modified membranes were analyzed by water contact angle, scanning electron microscopy, and Fourier transform infrared spectroscopy.
11p
tudichquannguyet
29-11-2021
12
2
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This study presents the results of research on water exchange and the environmental capacities of total suspended sediment (TSS), inorganic nutrients (PO4 3- , NO3 - and NH4 + ), and heavy metals (As, Hg, Cu, Cd, Pb, and Zn) in the receiving water of the Bach Dang estuary area.
3p
viwendy2711
05-10-2021
10
1
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The research goals of the thesis: Preparation and characterization of activated carbon products denaturated by surface oxidation technics. Determination of cation exchange capacity of the materials. Investigation of Mn and Fe linking on surface of prepared materials to form a new adsorption material for effective removing hazard anions in water environment.
26p
extraenglish
24-05-2021
23
2
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The performance and water use efficiency (WUE) of Chrysanthemum var. Marigold was evaluated under two moisture regimes, i.e., 100 % FC and 70 % FC imposed and maintained using gravimetric method. At 100 % FC, the plant height (30.33 cm), average plant spread (38.21 cm), number of primary branches/plant (5.67) and secondary branches/plant (4.67), number of leaves/plant (71.67), number of flowers/plant (136.75), average weight of individual flowers (7.21g), RWC (94.29%), root: shoot ratio (0.42), total fresh bio mass (153.09 g), flower yield (881.67 g / plant) and shelf life of 7.
14p
angicungduoc6
22-07-2020
10
2
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A field study was carried out on Alluvial soils of Varanasi to analyse the short term impacts of replacing mineral by organic fertilizers on the physico-chemical properties and enzyme activities relevant for soil fertility and crop production. Three types of fertilization regimes were tested viz., no fertilizer, conventional as 100% RDF by inorganic fertilizer and combined integrated fertilizer in which 70% RDF with 30% of the nitrogen were supplied by either FYM or pressmud or vermicompost or combination of these two or all.
10p
nguaconbaynhay6
24-06-2020
41
0
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Role of vermicompost in nourishing agricultural crops has attracted the attention of researchers throughout the globe in past few decades. Vermicompost is the method of using earthworms to transform organic waste into nutrient rich compost. The earthworms’ casting is nutritive organic manure rich in humus, NPK, micronutrients, beneficial microbes, antibiotics, enzymes, growth hormones, etc. There are many reports in literature showing beneficial effects of imbedding vermicompost in soil.
14p
nguathienthan5
04-06-2020
18
0
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Field experiments was conducted during 2015 on clay loam, sandy loam soil evaluate “to study the Effect of different levels of NPK and Vermicompost on physico-chemical properties of soil” comparison to inorganic fertilizers nitrogen, phosphorous, potassium.
6p
kethamoi4
16-04-2020
17
1
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Soil organic carbon (SOC) and Soil inorganic carbon (SIC) are important as it determine ecosystem and agro-ecosystem functions influencing soil structure, soil fertility, water holding capacity, cation exchange capacity and other soil characteristics. It is also of global importance because of its role in the global carbon cycle(GCC). The understanding of soil carbon in terms of its amount and quality is essential to sustain the quality and productivity of soils.
11p
caygaocaolon4
04-04-2020
13
0
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Wadi El Raiyan is a great depression located southwest of Cairo in the Western Desert of Egypt. Lake Qarun, located north of the study area, is a closed basin with a high evaporation rate. The source of water in the lake is agricultural and municipal drainage from the El Faiyum province. In 1973, Wadi El Raiyan was connected with the agricultural wastewater drainage system of the Faiyum province and received water that exceeded the capacity of Lake Qarun. Two hydrogeological regimes have been established in the area: (i) higher cultivated land and (ii) lower Wadi El Raiyan depression lakes.
14p
trinhthamhodang1
16-11-2019
19
0
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The paper represents some aspects of the water quality in O Loan lagoon. Two surveys were performed in March and July, 2014 - dry season, and October and November, 2014- rainy season. Due to specificity of O Loan lagoon with narrow estuary, capacity of water exchange is low. A shortage of dissolved oxygen (DO) has led to the pollution of lagoon water quality (4.4.mg/l in dry season and 5.5 mg/l in rainy season).
4p
vidanh27
08-12-2018
19
1
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This paper reports the influence of crystallization temperature and time on transformation of phlogopite to NaP1 and NaA zeolites. Samples were aged at room temperature within 96 hours, crystallized at 90 ÷ 140o C for 48 ÷ 96 hours in the presence of complexon (Co.) and NaOH and continuously stirred. The samples were estimated by X-ray diffraction (XRD), cation exchange capacity (CEC) and water adsorption.
5p
uocvong03
24-09-2015
66
5
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Zeolit từ khoáng sét cấu trúc 2 : 1 kiểu mica: 1-Nghiên cứu tổng hợp zeolit NaP1 và Naa từ phlogopit
NaP1 and NaA zeolites were synthesized from phlogopite taken in Yen Bai, Vietnam in the presence of organic complexons and NaOH. Samples were aged at room temperature in 96 hours, crystallized at 90 ÷ 140o C in 48 ÷ 72 hours and continuously stirred. The products were estimated by X-ray diffraction (XRD), scanning electron microscope (SEM), cation exchange capacity (CEC) and water adsorption.
6p
uocvong01
24-09-2015
59
4
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The Clean Water and Drinking Water State Revolving Funds are provided $2 billion in FY 2013. As part of the Administration’s long-term strategy, the EPA is implementing a Sustainable Water Infrastructure Policy that focuses on working with states and communities to enhance technical, managerial and financial capacity. Important to the enhanced technical capacity will be alternatives analyses to expand "green infrastructure" options and their multiple benefits.
0p
nhacsihuytuan
13-04-2013
42
2
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Nitrogen contamination may come from a variety of sources: municipal sewage, animal manure, atmospheric deposition, biological N fixation, soil organic N, and/or nitrogen fertilizers. The consequences of contamination in a specific water body will depend upon the amount of contamination from all sources and characteristics of the receiving waters. Shallow rivers, wetlands, lakes, and reservoirs, have some capacity to remove nitrogen by microbial denitrification.
12p
tainhacmienphi
19-02-2013
46
4
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The Evinox ModuSat satellite heating system has been designed to provide apartments and communal housing developments with independent fast recovery hot water and high efficiency heating. With a large range of models available, the system suits a variety of applications, from single occupancy apartments to groups of family homes. Consisting of a fast recovery hot water tank or high capacity heat exchanger, with either a hydraulic header or plate heat exchanger, pump and mixing valve set for the heating the ModuSat offers a total heating solution.
7p
connhobinh
07-12-2012
48
2
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Finally, the review in its concluding chapter looked at the future of so- cial funds. Broadly, three alternative paths were considered: The first was to focus on the question of transition. Because social funds are strong at demonstrating good practices and good governance, they can be im- portant in drawing best practices from other sectors. For example, there are some best practices in the water and sanitation and in the rural trans- port sectors. More experiences need to be exchanged outside social funds with some of the better programs in other sectors.
21p
thangbienthai
23-11-2012
57
7
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