PSJD - Yadda

1

Production of suspension fertilizers as a potential way of managing industrial waste

100%

Mikła D., Hoffmann K., Hoffmann J.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 3

9-11

EN

Research on the possibilities of utilizing several waste substances for the production of suspension fertilizers has been carried out. The substances were: sludge from the ALWERNIA S.A. Chemical Plant - a potential source of phosphorous (~20% by wt. P2O5) and waste sludge from the production of magnesium sulphates and nitrates in the Złotniki S.A. Chemical Plant - a substance aiding the stability of suspension and magnesite (a source of magnesium). The possibility of chemical activation of clayey minerals through ion exchange was investigated. Na2CO3 was used for this purpose. Fertilizer samples PK and NPK were found to be highly stable (syneresis < 25%). The NPK +3% MgO sample was found to have particularly good properties. The activation of the clayey materials by Na2CO3 resulted in an increase in the stability coefficient in the case of bentonite SN and clay TIK by 0.88964 and 0.516304, respectively.

2

The use of GIS in the design of location of objects for management of mixed municipal waste of the Sądecko-Gorlicki region

100%

Malinowski M., Petryk A., Rybiński J., Malinowski M., Petryk A., Rybiński J.

Biuletyn KPZK

|

2018

|

issue 272

3

Radiation levels of dumpsites within Imo State University, Owerri, Imo State, Nigeria

100%

Wirnkor V. A., Ebere E. C., Chukwunonso O. F., Ngozi V. E.

World News of Natural Sciences

|

2017

|

vol. 11

45-64

EN

With increasing population and human activities, dumpsites experience diverse sources of waste with potential radiation hazards. Ionizing radiations have often been overlooked amongst researchers in third world countries, hence, information in this regard is lacking. In this study, nine dumpsites within Imo State University (IMSU) grounds were assessed for radiation levels using Geiger Muller counter Tube Mullard type ZP 1481 with assisted scalar and stopwatch. After calibration, the instrument was placed one meter above ground level and count rates recorded at 10 minutes interval for each location once in the morning, the afternoon and the evening for seven days. Results reveal higher dose equivalents in some morning periods than in the afternoon and evening. Site ETF2 had highest value of 0.69±0.08 mSv·yr-1, while Extension gate had lowest value of 0.56±0.01 mSv·yr-1. Compared to National Council for Radiation Protection maximum permissible level, these values are quite low. In conclusion, ionizing radiations levels at the studied dumpsites in Imo State University grounds are low and may not pose a threat to persons within the university.

4

Mass transfer in the bath reactor of the adsorption process of 1,2-dichloropropane from aqueous solution onto the activated carbon

88%

Pełech R.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 2

30-33

EN

A pseudo-second order rate equation describing the kinetics of the adsorption of 1,2-dichloropropane from aqueous solution onto the activated carbon at different initial concentrations, adsorbent dose, temperature, particle diameter and the rate of stirring have been developed. The rate constant was calculated. The rate constant correlation in a good mixing conditions was described as a function of the temperature.

5

Recovery of bis(1-chloro-2-propyl) ether from aqueous solution onto activated carbon

88%

Pełech R.

Polish Journal of Chemical Technology

|

2010

|

vol. 12

|

issue 4

11-14

EN

The results of the studies of bis(1-chloro-2-propyl) ether adsorption from aqueous solution onto AG5 activated carbon were presented here. Dynamic adsorptivity, mass transfer zone and the velocity of the adsorption front of the 10cm adsorption bed depth for the velocity of flow 9 and 25 cm/min were determined. For the regeneration of the adsorption bed, acetone rinsing was used. Total washout of adsorbed bis(1-chloro-2-propyl) ether from the bed was obtained. After the regeneration the adsorbent has not shown deterioration of adsorption properties. To isolate bis(1-chloro-2-propyl) ether from acetone, distillation was used.

6

Phosphorus recovery from waste - methods review

88%

Wzorek Z., Gorazda K.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 2

57-60

EN

According to sustainable development principles, searching for alternative phosphorus sources, especially possible ways of its recycling from waste, should be treated as a preferential problem of the phosphorus industry. The ways admitted as most important are:- phosphorus recovery from municipal and industrial sewage and from sewage sludge,- utilization of phosphorus from manure- management of waste from meat industryThe forecasts elaborated at the end of the last century, indicate that over 50% of the world phosphorus resources in use today will be depleted during the next 60 - 70 years. That fact contributes to increase of market prices of phosphorus products.This work presents possible directions for the recovery and management of sewage sludge, meat meal and manure as a phosphorus source for chemical industry.

7

Adsorption of 1,2-dichloropropane from aqueous solution

88%

Pełech R., Milchert E.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 2

34-36

EN

In this study dependences of the adsorption equilibrium of 1,2-dichloropropane in aqueous solution for six activated carbons (A, AG, AG5, DTO, WD-ekstra, CWZ-22) and four polymeric adsorbents (XE-563, XE-572, XE-340, XE-348) were presented. All the adsorption isotherms onto activated carbons were described by the Freundlich equation. To analyze the isotherms on the polymeric adsorbents the Langmuir-Freundlich equation was used. It was found that in the low range of the concentrations the adsorptive properties of the activated carbons are reduced in the following direction DTO>WD-ekstra>CWZ-22>AG>A>AG5. Reducing the adsorptive properties of the polymeric adsorbents states was carried out in the following order: XE-340> XE-572>XE-563>XE-348. The adsorbents XE-340, XE-572 and XE-563 have much more higher adsorptive properties than the applied activated carbons. Lower adsorptive properties of XE-348 are the result of its high surface polarity.

8

Energy Balance Sheet of a Semi Operational Thermic System

88%

Honus S., Sassmanová V., Frantík J., Bukowsk P., Juchelková D.

Chemical and Process Engineering

|

2014

|

vol. 35

|

issue 3

317-329

EN

The article is focused onthe energetical balance of a technical system for the conversion of crushed tyres by pyrolysis. Process temperatures were set in the range from 500 to 650°C. Mass input of the material was 30 kg per hour. The aim of the article is to answer the following questions as regards the individual products: Under which process conditions can the highest quality of the individual products related to energy be reached? How does the thermal efficiency of the system change in reaction to various conditions of the process? On the basis of the experimental measurements and calculations, apart from other things, it was discovered that the pyrolysis liquid reaches the highest energetic value, i.e. 42.7 MJ.kg-1, out of all the individual products of the pyrolysis process. Generated pyrolysis gas disposes of the highest lower calorific value 37.1 MJ.kg-1 and the pyrolysis coke disposes of the maximum 30.9 MJ kg-1. From the energetic balance, the thermal efficiency of the experimental unit under the stated operational modes ranging from about 52 % to 56 % has been estimated. Individual findings are elaborated on detail in the article.

9

Modification of Salix americana willow bark for removal of heavy metal ions from aqueous solutions

88%

Rypińska I., Biegańska M.

Polish Journal of Chemical Technology

|

2014

|

vol. 16

|

issue 4

41-44

EN

Salix americana willow bark is a waste arising in the process of wicker decortication that so far has not found any practical application. The bark can adsorb metal ions, because in its composition among others are phenolic groups which may be involved in the removal of metal ions from water solutions. The results of sorption of copper(II) and zinc(II) on modified willow bark of Salix americana were presented. The bark was modified with nitric and sulfuric acids at concentrations ranging from 5 to 15%. The best adsorption results were obtained using 15% nitric acid for modification. Adsorption of metal ions from aqueous solutions at concentrations raging from 20 to 100 mg/dm3 was studied. It was found that an increase in the initial concentration of copper(II) and zinc(II) resulted in an increase in their adsorption on the modified cortex.

10

Storage of dangerous medical wastes in medical service institutions

88%

Furtak-Niczyporuk M.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

|

2017

|

vol. XIV

11

Utilization of agricultural and industrial wastes for metal removal from aqueous solutions

75%

Biegańska M., Cierpiszewski R.

Polish Journal of Chemical Technology

|

2011

|

vol. 13

|

issue 1

20-22

EN

In this study a possibility of obtaining sorbents from basketry wastes has been investigated. Therefore, adsorption of cadmium ions on wicker bark of Salix americana has been studied. The obtained experimental results were described by the Freundlich equation and adsorption kinetics by the pseudo-second order equation. The effect of pH on cadmium ions adsorption by S. americana was also investigated. It has been found that for the pH values ranging from 2 to 7 cadmium removal from the solution was held at almost constant level.

12

Optimization of chemical aids in the process of deinking sludge thickening

75%

Czechowski J., Olejnik K.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 4

121-123

EN

The authors have analyzed a modern technological line of the latest chemicals for the recovered paper processing and de-inking in terms of reducing the amount of wastes arising during the production. The authors have also investigated the effectiveness of selected chemical aids (coagulants and flocculants) supporting the process of sludge dewatering. 12 different types of flocculants were tested. The best chemical agent was selected as well as its optimal dosage. The highest dynamics of sludge dewatering improvement (expressed by the dewatering time under standard conditions) was observed with the ECR3 agent dosage of 6 - 6.5 kg per tonne of the absolutely dry sludge. Long-term analyses of the tested line have proved that the retention aid and its dosage were selected correctly.

13

Energy Balance Sheet of a Semi Operational Thermic System

75%

Honus S., Sassmanová V., Frantík J., Bukowski P., Juchelková D.

Chemical and Process Engineering

|

2014

|

issue 3

14

Utilization of waste gypsum in fertilizer production

75%

Malinowski P., Borowik M., Wantuch W., Urbańczyk L., Dawidowicz M., Biskupski A.

Polish Journal of Chemical Technology

|

2014

|

vol. 16

|

issue 1

45-47

EN

The results of the study regarding utilization of the waste gypsum formed as a by-product during the production of the magnesium sulphate from dolomite have been presented. The use of this waste have been proposed for the production of granulated multi-component fertilizers containing 25% N; 8% S; 14% CaO and 3.5% MgO. In the process of fertilizer production, the urea which will be bounded with the calcium and magnesium sulphate from the waste in the form of adducts of CaSO4 . 4CO(NH2)2 and MgSO4 . CO(NH2)2 . 3H2O will be the source of nitrogen in the fertilizer. It has been stated on the basis of the laboratory tests that the fertilizer with the assumed composition can be obtained by means of granulation of the raw material pulp, along with the dried and ground product return. The possibility of the production of the fertilizer with good physical properties according to the assumed concept has been confirmed in the pilot scale

15

Seasonal Distribution of Benthic Foraminifera in Pangandaran Waters, Indonesia

75%

Yuliadi L. P. S., Nurruhwati I., Astuty S.

World News of Natural Sciences

|

2020

|

vol. 29

|

issue 3

225-239

EN

The rapid development of tourism in Pangandaran causes various problems such as environmental degradation, environmental pollution and waste problems. Environmental changes can be detected using the foraminifera community. The reasearch aims to analyze seasonal distribution of foraminifera in Pangandaran waters. This research uses the survey method and descriptive data analysis. Ecological factors (salinity, temperature, sediment, depth, pH, DO, clarity, waves and currents) have affected their distribution. Temperature values ranged between 26 to 30 ºC. Salinity values ranged between 15.6 to 31 ‰. The pH ranged from 5.47 to 8.75. The DO concentration varied between 5.43 and 9.7 ppm. The average clarity of Pangandaran waters in the west season ranges from 56 to 104.5 cm. In Pangandaran waters, the abundance of the Rotaliina sub-order reaches between 75% to 86.5%, Miliolina 11.6% to 19%, and Textulariina 0.05% to 13.4%.

16

The content of heavy metals in foundry dusts as one of the criteria for assessing their economic reuse

75%

Bożym M., Klojzy-Karczmarczyk B., Bożym M., Klojzy-Karczmarczyk B.

Gospodarka Surowcami Mineralnymi

|

2020

|

vol. 36

|

issue 3

17

From sewage sludge ash to calcium phosphate fertilizers

75%

Gorazda K., Kowalski Z., Wzorek Z.

Polish Journal of Chemical Technology

|

2012

|

vol. 14

|

issue 3

54-58

EN

Our work presents the results of the research on the utilization of ashes after sewage sludge combustion comprising phosphorus recovery in the form of useful products. The investigations were divided into three parts: selecting the combustion parameters of sewage sludge, examining ash leaching with mineral acids (nitric and phosphoric) to high phosphorus selectivity assuring a low content of iron and heavy metals in the extracted solutions and precipitation of CaHPO4 .2H2O. Suitable temperature of a sewage sludge combustion enables selective extraction of phosphorus compounds from ash because of hematite phase forming, insoluble in mineral acids. The extracts from phosphoric acid leaching, where the extraction of phosphorus compounds was 96.1%, have very good properties for its further use as the initial solution for CaHPO4 .2H2O with 6% lime milk. The obtained product is characterized by high purity and phosphorus availability compatible even with the feed phosphate standard.

18

Acoustic Absorption of Mortar Composites with Waste Material

75%

González M. A. S., Flach F., Pires J. R., Kulakowski M. P.

|

19

The Materials Resistant to High Temperatures Obtained from Post-Production Fibrous Waste

75%

Kogut K., Kasprzyk K., Kłoś R., Kogut K., Kasprzyk K., Kłoś R.

|

20

Effect of Addition Glycerol Plasticizer to the Characteristics of Catfish (Pangasius sp.) Surimi Protein Edible Film

75%

Frasisca S., Rostini I., Suryana A. A. H., Pratama R. I.

World News of Natural Sciences

|

2020

|

vol. 30

|

issue 2

243-256

EN

Catfish (Pangasius sp.) is a freshwater fish commodity that is processed into filet. The development of the catfish fillet industry has generated a lot of waste. One of the uses is making surimi, but not all surimi produced is of high quality. Surimi is an intermediate product that has undergone a process of washing, pressing, and freezing. Surimi with low quality can be improved as raw material for making edible films. Edible film is a thin layer made of material that is safe for consumption and biodegradable. This research aims to determine the best concentration of glycerol as a plasticizer in the catfish surimi protein edible film and to determine the characteristics of the edible film produced. The method that was used in this research is the experimental method with Completely Randomized Design (CRD) with three treatments and three repeats of addition glycerol plasticizer concentrations are 0.6%, 0.8%, and 1.0%. The parameters observed were thickness, tensile strength, elongation, transparency, and solubility. The resulting data were analyzed using ANOVA and continued with the Duncan test (α = 5%). The results showed that edible film with the addition of 1.0% glycerol plasticizer concentration has the best characteristics based on Japanese Industrial Standard (JIS) and statistic analysis with a thickness of 0.068 mm, tensile strength of 402.02 kgf / cm2, elongation of 33.3%, clarity of 98.06% and transparency of 1.94.

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Production of suspension fertilizers as a potential way of managing industrial waste

The use of GIS in the design of location of objects for management of mixed municipal waste of the Sądecko-Gorlicki region

Radiation levels of dumpsites within Imo State University, Owerri, Imo State, Nigeria

Mass transfer in the bath reactor of the adsorption process of 1,2-dichloropropane from aqueous solution onto the activated carbon

Recovery of bis(1-chloro-2-propyl) ether from aqueous solution onto activated carbon

Phosphorus recovery from waste - methods review

Adsorption of 1,2-dichloropropane from aqueous solution

Energy Balance Sheet of a Semi Operational Thermic System

Modification of Salix americana willow bark for removal of heavy metal ions from aqueous solutions

Storage of dangerous medical wastes in medical service institutions

Utilization of agricultural and industrial wastes for metal removal from aqueous solutions

Optimization of chemical aids in the process of deinking sludge thickening

Energy Balance Sheet of a Semi Operational Thermic System

Utilization of waste gypsum in fertilizer production

Seasonal Distribution of Benthic Foraminifera in Pangandaran Waters, Indonesia

The content of heavy metals in foundry dusts as one of the criteria for assessing their economic reuse

From sewage sludge ash to calcium phosphate fertilizers

Acoustic Absorption of Mortar Composites with Waste Material

The Materials Resistant to High Temperatures Obtained from Post-Production Fibrous Waste

Effect of Addition Glycerol Plasticizer to the Characteristics of Catfish (Pangasius sp.) Surimi Protein Edible Film