scholarly journals Separation efficiency of two waste polymer fibers for oily water treatment

2016 ◽  
pp. 167-174
Author(s):  
Dunja Sokolovic ◽  
Tatjana Vulic ◽  
Arpad Kiralj ◽  
Milica Hadnadjev-Kostic ◽  
Srdjan Sokolovic
Keyword(s):  
Textile Industry ◽  
Separation Efficiency ◽  
Fluid Velocity ◽  
Polymeric Materials ◽  
Flow Mode ◽  
Chemical Characteristics ◽  
Oily Wastewater ◽  
Mineral Oils ◽  
Physico Chemical ◽  
Wide Range

This work is concerned with the efficiency of two different waste polymeric materials as the filter media in a laboratory-scale bed coalescer in the horizontal fluid flow mode, operating in a steady-state regime. The applied materials are: waste polyethylene terephthalate from textile industry, BA1 and waste polypropylene from carpet industry, PP. Using these compressible fiber polymeric materials, high bed porosity (up to 98%) could be obtained. The investigation was carried out over a wide range of working conditions. Bed permeability was varied in the range from 0.18?10-9 to 5.389?10-9 m2. Operating fluid velocity was varied from 19 to 80 m/h, until the critical velocity was reached. Different oily wastewaters were used in the experiments. Oily wastewater is defined as the oil-inwater emulsion model prepared using mineral oils of different physico-chemical characteristics: crude oil (A) from Vojvodina region, two vacuum distillation fractions (A1, A4), and blended petroleum product with a high paraffinic content (P1). Both applied polymeric materials, BA1 and PP, showed high separation efficiency for treatment of all investigated oily wastewater. However, the BA1 material showed higher efficiency in a wider range of bed permeability and physico-chemical characteristics of oil.

scholarly journals Separation of mineral oil droplets using polypropylene fibre bed coalescence

2015 ◽  
Vol 69 (4) ◽  
pp. 339-345 ◽  
Author(s):  
Dragan Govedarica ◽  
Radmila Secerov-Sokolovic ◽  
Arpad Kiralj ◽  
Olga Govedarica ◽  
Dunja Sokolovic ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Polypropylene Fibre ◽  
Polypropylene Fibres ◽  
Mineral Oils ◽  
Dispersed Oil ◽  
Fluid Velocities ◽  
Physico Chemical ◽  
Oil In Water ◽  
Wide Range ◽  
Emulsion Oil

This paper investigates the separation possibilities of model emulsion oil-in-water using polypropylene fibre bed coalescence. Experiments were carried out over a wide range of physico-chemical characteristics of mineral oils, bed permeability and operating fluid velocities. The aim of this study was to analyse the influence of the dispersed oil phase nature and of the bed geometry on the separation efficiency. From the obtained results, it can be concluded that polypropylene fibres in the broadest studied range of bed permeabilities and fluid velocities, effectively separate oil that is highly polar. On the contrary, for the other two investigated oils at low values of bed permeability a region was detected in which the coalescer is incapable to operate. It has to be emphasized that the polypropylene fibres efficiently separate all three investigated oils at the highest studied bed permeability.

scholarly journals Physico-chemical characteristics of textile effluent collected from Erode, Pallipalayam and Bhavani polluted regions, Tamilnadu, India

2017 ◽  
Vol 9 ◽  
Author(s):  
Ganesan Sathiyaraj ◽  
K. Chellappan Ravindran ◽  
Zakir Hussain Malik
Keyword(s):  
Environmental Protection Agency ◽  
Textile Industry ◽  
Skin Irritation ◽  
Textile Effluent ◽  
Chemical Characteristics ◽  
Textile Dye ◽  
Protection Agency ◽  
Huge Amount ◽  
Physico Chemical ◽  
Calcium Magnesium

<p>Present study perceives that textile dye effluents of Erode, Pallipalayam and Bhavani region have substantial volume of EC, pH, TDS, COD, BOD, Sodium Chloride, Calcium, Magnesium, Potassium and heavy metals. Results point out that irrespective of the source, effluent properties exceeded permissible limits by WHO/ FAO/Federal Environmental Protection Agency for irrigation. The textile industry consumes a mixture of chemicals and huge amount of water during the production process. About 200 L of water are used to produce 1 kg of textile. The textile effluent can cause several health infections like haemorrhage, ulceration of skin, nausea, skin irritation and dermatitis. <br /><br /></p>

scholarly journals Study on the physico-chemical characteristics of longan (Euphoria longana) germplasm

2012 ◽  
Vol 37 (3) ◽  
pp. 441-447
Author(s):  
MM Khatun ◽  
MR Karim ◽  
MM Molla ◽  
MM Khatun ◽  
MJ Rahman
Keyword(s):  
Agricultural Research ◽  
Soluble Solids ◽  
Research Centre ◽  
Chemical Characteristics ◽  
Central Laboratory ◽  
Agricultural Research Institute ◽  
Physico Chemical ◽  
Wide Range ◽  
Different Characteristics ◽  
Physical And Chemical

A study on the physico-chemical characteristics of 15 promising longan germplasm was carried out at the fruit Research Farm of Horticulture Research Centre (HRC) as well as laboratory of Post harvest Technology Section of HRC and the Central Laboratory of Bangladesh Agricultural Research Institute, Joydebpur, Gazipur. The experiment was conducted during the fruiting season of 2010. Fifteen promising lines of longan germplasm including BARI Anshphal-1, BARI Anshphal-2, EL-Joy 003 to EL-Joy 015 of 12 years old were included in this experiment. A wide range of variations were observed among the germplasm in respect of different characteristics under the present study. Per cent edible portion was the highest in EL-Joy 010 (76.57 %), EL-Joy 006 (74.55%), EL-Joy 003 (74.20 %) and the lowest in EL-Joy 012 (65.10 %). Total reducing and non-reducing sugar was the maximum in EL-Joy 009 (6.94 %) and BARI Anshphal-2 (16.50 %), respectively. BARI Anshphal-1 contained the highest amount of ascorbic acid (13.00 mg/100 g) and EL-Joy 009 possessed the maximum total soluble solids (22.30 %). The study revealed that BARI Anshphal-1, BARI Anshphal-2, EL-Joy 003, EL-Joy 006, EL-Joy 009, EL-Joy 010 were the best in respect of physical and chemical characteristics of fruits. Bangladesh J. Agril. Res. 37(3): 441-447, September 2012 DOI: http://dx.doi.org/10.3329/bjar.v37i3.12087

scholarly journals Pearson's Correlation Between Physico-chemical Aspects of Wheat Flour and Quality Attributes of Cookies

2020 ◽  
Vol 63 (1) ◽  
pp. 1-8
Author(s):  
Ayesha Riaz ◽  
Imran Pasha ◽  
Mian Kamran Sharif
Keyword(s):  
Water Absorption ◽  
Positive Relationship ◽  
Chemical Properties ◽  
Chemical Characteristics ◽  
Wheat Varieties ◽  
Correlation Studies ◽  
Damaged Starch ◽  
Physico Chemical ◽  
Wide Range ◽  
Spread Factor

In this study, we investigated various physico-chemical properties of wheat and evaluated their correlation with cookie attributes. Results showed that damaged starch in wheat varieties ranged from 6.28 to 10.97%. SDS-sed. and AWRC values were recorded as 18.20-30.50 mL and 43.91-66.85%, respectively. WSRC, SOCSRC, SUCSRC and LASRC values varied over a wide range as 50.83-69.64%, 56.66-82.03%, 75.79-106.97% and 79.43-121.20%, respectively. Physical analyses of cookies made with wheat varieties indicated 25.20-26.60 cm width, 5.80-6.40 cm thickness and 39.38-45.86 spread factor and 2.17-3.91 kg hardness. Important correlations were reported between water absorption and SDS sedimentation (r= 0.912*). Likewise, a positive relationship was found between damaged starch and SUCSRC (r=  0.985**).Spread factor was found to be negatively correlated to ash (r= -0.977**), protein(r= -0.892*), SOCSRC (r= -0.952*), WSRC (r= -0.892*) and hardness (r= -0.990**).Correlation studies indicated that physico-chemical characteristics of flour are imperative in the evaluation of cookie making quality.

scholarly journals Dendrimers: properties and applications.

2001 ◽  
Vol 48 (1) ◽  
pp. 199-208 ◽  
Author(s):  
B Klajnert ◽  
M Bryszewska
Keyword(s):  
Chemical Properties ◽  
Polymeric Materials ◽  
Industrial Applications ◽  
New Class ◽  
Research Technology ◽  
Concise Review ◽  
Physico Chemical ◽  
Wide Range ◽  
Physical And Chemical ◽  
And Chemical Properties

Dendrimers are a new class of polymeric materials. They are highly branched, monodisperse macromolecules. The structure of these materials has a great impact on their physical and chemical properties. As a result of their unique behaviour dendrimers are suitable for a wide range of biomedical and industrial applications. The paper gives a concise review of dendrimers' physico-chemical properties and their possible use in various areas of research, technology and treatment.

scholarly journals Separation of oil drops from water using stainless steel fiber bed

2017 ◽  
Vol 23 (2) ◽  
pp. 269-277 ◽  
Author(s):  
Arpad Kiralj ◽  
Tatjana Vulic ◽  
Dunja Sokolovic ◽  
Radmila Secerov-Sokolovic ◽  
Pero Dugic
Keyword(s):  
Stainless Steel ◽  
Steel Fiber ◽  
Separation Efficiency ◽  
Filter Material ◽  
Superficial Velocity ◽  
Mineral Oils ◽  
Bed Porosity ◽  
Lower Viscosity ◽  
Stainless Steel Fiber ◽  
Wide Range

This study is focused on the separation of oil droplets from water by applying a stainless steel fiber bed. The separation efficiency was followed by monitoring the oil concentration of three mineral oils that have a wide range of viscosity from 10 to 170 mP s, as well as neutralization number from 0.10 to 1.70 mg KOH/l. The bed properties were varied by altering the bulk density of the filter material, which resulted in a change of bed permeability from 0.7?10-9 to 5.389?10-9 m2 and bed porosity from 91 to 98%. All experiments were conducted in a wide range of superficial velocity from 10 to 50 m/h. It can be concluded that high separation efficiency was achieved using stainless steel fibers, reaching values over 90%. Low bed permeability is most favorable for work at the selected conditions for the separation. The operation of stainless steel fiber bed is very sensitive to changes in the properties of oils. For lower viscosity of oily contaminants, the required efficiency of separation is achieved at lower superficial velocity through the fibrous bed. This phenomenon can be considered as a serious drawback since the bed coalescers often have to separate oils of different quality over time.

Solution chemistry effects on the solvation shell of metal ions

2020 ◽  
Author(s):  
Xiangwen Wang ◽  
Dimitrios Toroz ◽  
Seonmyeong Kim ◽  
Simon Clegg ◽  
Gun-Sik Park ◽  
...  
Keyword(s):  
Metal Ions ◽  
Pure Water ◽  
Solvation Shell ◽  
Solution Chemistry ◽  
Chemical Characteristics ◽  
Velocity Autocorrelation Function ◽  
Ionic Solvation ◽  
General Terms ◽  
Alkaline Earth Metal Ions ◽  
Wide Range

<div> <p>As natural aqueous solutions are far from being pure water, being rich in ions, the properties of solvated ions are of relevance for a wide range of systems, including biological and geochemical environments. We conducted ab initio and classical MD simulations of the alkaline earth metal ions Mg<sup>2+</sup> and Ca<sup>2+</sup> and of the alkali metal ions Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup> and Cs<sup>+</sup> in pure water and electrolyte solutions containing the counterions Cl<sup>–</sup> and SO<sub>4</sub><sup>2–</sup>. Through a detailed analysis of these simulations, this study reports on the effect of solution chemistry (composition and concentration of the solution) to the ion–water structural properties and interaction strength, and to the dynamics, hydrogen bond network, and low-frequency dynamics of the ionic solvation shell. Except for the ion–water radial distribution function, which is weakly dependent on the counter-ions and concentrations, we found that all other properties can be significantly influenced by the chemical characteristics of the solution. Calculation of the velocity autocorrelation function of magnesium ions, for example, shows that chlorine ions located in the second coordination shell of Mg<sup>2+</sup> weaken the Mg(H<sub>2</sub>O)<sub>6</sub><sup>2+</sup> hydration ‘cage’ of the cation. The result reported in this study suggest that ionic solvation shell can be significantly influenced by the interactions between other ions present in solution ions, especially those of opposite charge. In more general terms, the chemical characteristics of the solution, including the balance between ion-solvent and ion-ion interactions, could result in significant differences in behavior and function of the ionic solvation shell.</p> </div>

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