scholarly journals Adsorbed Leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

2020 ◽  
Author(s):  
Hans Kristianto ◽  
Edwin Reynaldi ◽  
Susiana Prasetyo ◽  
Asaf K Sugih
Keyword(s):  
Protein Adsorption ◽  
Lower Cost ◽  
Trisodium Citrate ◽  
Settling Time ◽  
Treated Water ◽  
Citrate Concentration ◽  
Dissolved Organics ◽  
Coagulant Dosage ◽  
Before And After ◽  
Natural Coagulants

Abstract Natural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using SEM, XRD, FTIR, and TEM, to observe the characteristics before and after protein adsorption. Furthermore the effect of pH (2.0 to 10.0) and coagulant dosage (60 to 600 mg L-1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3.0 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420 mg L-1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value, indicating lower increase of dissolved organics in the treated water.

scholarly journals Adsorbed Leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

2020 ◽  
Author(s):  
Hans Kristianto ◽  
Edwin Reynaldi ◽  
Susiana Prasetyo ◽  
Asaf K Sugih
Keyword(s):  
Protein Adsorption ◽  
Lower Cost ◽  
Trisodium Citrate ◽  
Settling Time ◽  
Treated Water ◽  
Citrate Concentration ◽  
Dissolved Organics ◽  
Coagulant Dosage ◽  
Before And After ◽  
Natural Coagulants

Abstract Natural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using SEM, XRD, FTIR, and TEM, to observe the characteristics before and after protein adsorption. Furthermore the effect of pH (2.0 to 10.0) and coagulant dosage (60 to 600 mg L-1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3.0 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420 mg L-1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value, indicating lower increase of dissolved organics in the treated water.

scholarly journals Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Hans Kristianto ◽  
Edwin Reynaldi ◽  
Susiana Prasetyo ◽  
Asaf K. Sugih
Keyword(s):  
Electron Microscopy ◽  
Protein Adsorption ◽  
Trisodium Citrate ◽  
Settling Time ◽  
Treated Water ◽  
Citrate Concentration ◽  
Transmission Electron ◽  
Dissolved Organics ◽  
Coagulant Dosage ◽  
Before And After

AbstractNatural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using Scanning Electron Microscopy, X-ray Diffraction, Fourier Transform Infrared Spectroscopy, and Transmission Electron Microscopy to observe the characteristics before and after protein adsorption. Furthermore, the effect of pH (2 to 10) and coagulant dosage (60 to 600 mg L− 1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420 mg L− 1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value, indicating lower increase of dissolved organics in the treated water.

scholarly journals Adsorbed Leucaena Protein on Citrate Modified Fe3O4 Nanoparticles: Synthesis, Characterization, and Its Application As Magnetic Coagulant

2020 ◽  
Author(s):  
Hans Kristianto ◽  
Edwin Reynaldi ◽  
Susiana Prasetyo ◽  
Asaf K Sugih
Keyword(s):  
Protein Adsorption ◽  
Leucaena Leucocephala ◽  
Lower Cost ◽  
Trisodium Citrate ◽  
Settling Time ◽  
Citrate Concentration ◽  
Adsorbed Protein ◽  
Coagulant Dosage ◽  
Before And After ◽  
Natural Coagulants

Abstract Natural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon (DOC) in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using SEM, XRD, FTIR, and TEM, to observe the characteristics before and after protein adsorption. Furthermore the effect of pH (2-10) and coagulant dosage (60-600 mg. L-1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3.0 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420mg. L-1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value.

scholarly journals Adsorbed leucaena protein on citrate modified Fe3O4 nanoparticles: synthesis, characterization, and its application as magnetic coagulant

2020 ◽  
Author(s):  
Hans Kristianto ◽  
Edwin Reynaldi ◽  
Susiana Prasetyo ◽  
Asaf K Sugih
Keyword(s):  
Electron Microscopy ◽  
Protein Adsorption ◽  
Trisodium Citrate ◽  
Settling Time ◽  
Treated Water ◽  
Citrate Concentration ◽  
Transmission Electron ◽  
Dissolved Organics ◽  
Coagulant Dosage ◽  
Before And After

Abstract Natural coagulants from plants resources have gained a lot of attention as it is renewable, biodegradable, non-hazardous, lower cost, and less sludge generated compared to chemical coagulants. However there are still some drawbacks, namely long settling time and possible increase of dissolved organic carbon in the treated water. In this paper we tried to address these drawbacks by utilizing citrate modified Fe3O4 to adsorb protein from Leucaena leucocephala as the active coagulating agent. The effect of trisodium citrate concentration and protein adsorption pH to the adsorbed protein was investigated. It was found that the trisodium citrate concentration of 0.5 M and pH 4.0 gave the highest protein adsorption. The obtained magnetic coagulant was furthermore characterized using Scanning Electron Microscopy, X-ray Diffraction, Fourier Transform Infrared Spectroscopy, and Transmission Electron Microscopy to observe the characteristics before and after protein adsorption. Furthermore, the effect of pH (2 to 10) and coagulant dosage (60 to 600 mg L-1) to the removal of synthetic Congo red wastewater and sludge volume formation was investigated. It was found that pH 3 was the best pH for coagulation due to charge neutralization mechanism of leucaena protein. Furthermore the highest removal was obtained at dosage 420 mg L-1 with 80% removal. This result was comparable with crude extract of leucaena with half settling time (20 min) and lower increase of permanganate value, indicating lower increase of dissolved organics in the treated water.

scholarly journals Performance of Natural Coagulants in the Treatment of Vegetable Oil Industrial Effluent

2020 ◽  
pp. 12-21
Author(s):  
C. F. Okey- Onyesolu ◽  
C. C. Okoye ◽  
C. N. Ude ◽  
O. D. Onukwuli ◽  
O. E. Achugbu
Keyword(s):  
Vegetable Oil ◽  
Industrial Wastewater ◽  
Industrial Effluent ◽  
Chemical Properties ◽  
Proximate Analysis ◽  
Chemical Compositions ◽  
Fish Scale ◽  
Coagulant Dosage ◽  
Natural Coagulants ◽  
Egg Shell

The potentials of natural coagulants (egg shell and fish scale) in the treatment of vegetable oil industrial wastewater were investigated. The coagulants were characterized to determine their chemical compositions, functional groups and morphology using proximate analysis method, Fourier Infra-red spectroscope (FTIR) and Scanning Electron Microscope (SEM) respectively. The industrial wastewater was equally characterized to determine its heavy metal composition and physico-chemical properties. The effects of various process parameters such as pH, coagulants dosage, time and temperature were examined during the treatment of the waste water using the natural coagulants. The proximate analysis shows that Fish Scale Coagulant (FSC) contains more carbohydrate, 42.30% while Egg Shell Coagulant (ESC) has protein content of 39.65%. It was discovered that the coagulating properties of both FSC and ESC improve after extraction due to presence of isocyanates, isothiocyadilimides, azides, ketenes, aldehydes and ketone. The turbidity of the wastewater was very high (365NTU) above the WHO recommended value. The process variables have significant effects on the coagulation with best removal efficiency of 88.54% for ESC and 74.12% for FSC at pH of 4.0 (ESC) and pH of 7.0(FSC); 0.5 g/L (ESC) and 0.04 g/L (FSC) coagulant dosage and temperature of 40°C. Therefore, both coagulants are effective in treating vegetable oil effluent but egg shell coagulant was found to be a better coagulant. Further research on optimization, kinetics and thermodynamics of the coagulation process using ESC and FSC should be carried out.

scholarly journals Variation in the prices of oncology medicines across Europe and the implications for the future

2021 ◽  
Vol 10 (2) ◽  
pp. 72-82
Author(s):  
Brian Godman ◽  
Steven Simoens ◽  
Amanj Kurdi ◽  
Gisbert Selke ◽  
John Yfantopoulos ◽  
...  
Keyword(s):  
Population Size ◽  
Patent Protection ◽  
Lower Cost ◽  
European Countries ◽  
Health Authorities ◽  
Before And After ◽  
Per Capita ◽  
Oral Oncology ◽  
Over Time ◽  
Ageing Populations

Introduction/Objectives: Health authorities are facing increasing challenges to the sustainability of their healthcare systems because of the growing expenditures on medicines, including new, high-priced oncology medicines, and changes in disease prevalence in their ageing populations. Medicine prices in European countries are greatly affected by the ability to negotiate reasonable prices. Concerns have been expressed that prices of patented medicines do not fall sufficiently after the introduction of lower-cost generic oncology medicines. The objective of this study was to examine the associations over time in selected European countries between the prices of oral oncology medicines, population size, and gross domestic product (GDP) before and after the introduction of generic versions. Evidence of periodic reassessments of the price, value, and place in treatment of these medicines was also looked for. The goal of this review was to stimulate debate about possible improvements in approaches to reimbursement negotiations. Methodology: Analysis was performed of reimbursed prices of three oral oncology medicines (imatinib, erlotinib and fludarabine) between 2013 and 2017 across Europe. Correlations were explored between GDP, population size, and prices. Findings were compared with previous research regarding prices of generic oral oncology medicines. Results: The prices of imatinib, erlotinib and fludarabine varied among European countries, and there was limited price erosion over time in the absence of generics. There appeared to be no correlation between population size and price, but higher prices of on-patent oral cancer medicines were seen among countries with higher GDP per capita. Conclusion: Limited price erosion for patented medicines contributed to increases in oncology medicine budgets across the region. There was also a concerning lack of evidence re-assessments of the price, value, and place in treatment of patented oncology medicines following the loss of patent protection of standard medicines. The use of such proactive re-assessments in negotiating tactics might positively impact global expenditures for oncology medicines.

Sensing of Protein Adsorption by Composites Consisting of Silver Nanoparticles and Hydroxyapatite

2010 ◽  
Vol 76 ◽  
pp. 90-99
Author(s):  
Chikara Ohtsuki ◽  
Yuji Ichikawa ◽  
Hiroyuki Shibata ◽  
Tsukasa Torimoto ◽  
Ill Yong Kim
Keyword(s):  
Silver Nanoparticles ◽  
Protein Adsorption ◽  
Phosphate Buffer Solution ◽  
Trisodium Citrate ◽  
Localized Surface Plasmon ◽  
Surface Charges ◽  
Buffer Solution ◽  
Promising Candidate ◽  
Hydroxyapatite Powder ◽  
The Matrix

The sensing of protein adsorption by silver nanoparticles/hydroxyapatite composites was investigated using a phosphate buffer solution containing bovine serum albumin (BSA) or lysozyme (LSZ). The adsorption of BSA and LSZ on the composites prepared without using trisodium citrate was similar to plain hydroxyapatite, whereas composites prepared with trisodium citrate showed lower BSA adsorption and higher LSZ adsorption than plain hydroxyapatite powder. Because the ability of the adsorption is mainly governed by surface charges of the powders, the usage of trisodium citrate during the preparation is assumed to produce high negative charges on the surface. The protein adsorption resulted in peak shifts in localized surface plasmon resonance (LSPR) spectra. The peak shifts clearly corresponded to the concentration of the surrounding proteins up to the point of saturation of adsorption on the hydroxyapatite. The silver nanoparticles/hydroxyapatite composites are promising candidate materials for detection of protein adsorption by measurement of LSPR peak shifts, that may be attributed to changes in the dielectric properties of the matrix fluid surrounding the silver nanoparticles.

Determination of Phenolic Compounds from Jimma Drinking Water Using 4-Aminoantipyrine

2020 ◽  
Vol 12 (5) ◽  
pp. 690-694
Author(s):  
Kassahun Dejene Belayneh ◽  
Khalid Siraj ◽  
Mengesha Tigist
Keyword(s):  
Drinking Water ◽  
Phenolic Compounds ◽  
Disease Transmission ◽  
Raw Water ◽  
Treated Water ◽  
Before And After ◽  
Sulfur Containing ◽  
Jimma Town

The quality of drinking water in Ethiopia is an influential environmental factor of health and water can use as a medium for disease transmission in countries on all continents; all are affected from the poorest to the richest. Moreover, in our globe millions of people are unprotected to unsafe concentration of chemical pollutants in the drinking water. Dichlorohenols are considered as key water pollutants that are destructive to creatures at stumpy concentrations and many of them have been clustered as detrimental pollutants because of their probable to damage human health even in low concentration. This research aimed to determine phenolic compounds from drinking water of Jimma town which is found south west of Ethiopia, by using 4-Aminoantipyridine (AAP). The sample of drinking water before and after treatment was collected for determination of pollutants which classified as raw water (RW), treated water (TW) and system distributed water (SDW). The sample of water was preserved by phosphoric acid and sulfuric acid under pH 4 and distillation was carried out in order to remove sulfur containing compounds by addition of CuSO4 solution. In the analysis of water using 4-Aminoantipyrine the treated water and the system distributed water have been contained 2.73 ppb and 3.64 ppb which had more phenolic compounds as compared to raw water of 1.18 ppb. Therefore, the existence of phenolic compound in both treated and system distributed water of Jimma town drinking water has more phenolic compounds as compared to the permissible level of both Ethiopian Standard, 2 ppb and EPA Standards, 1 ppb.

Preparation of Cellulose Acetate Ultra-Fine Fibers Containing Quasi-Spherical Gold Nanoparticles by Electrospinning Method

2011 ◽  
Vol 391-392 ◽  
pp. 400-403
Author(s):  
Dong Mei Zhao ◽  
Li Guo Sun ◽  
Li Li Lv ◽  
Jian Li
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Cellulose Acetate ◽  
Trisodium Citrate ◽  
X Ray Diffraction ◽  
Au Nps ◽  
Transmission Electron ◽  
Electrospinning Method ◽  
Before And After ◽  
Spherical Gold Nanoparticles

Quasi-spherical gold nanoparticles(Au NPs) prepared by trisodium citrate reduction of HAuCl4were dispersed into cellulose acetate(CA) ultra-fine fibers by electrospinning. The optical properties of Au NPs before and after electrospinning were measured by UV-vis spectrometer. The morphology and distribution of Au NPs in CA ultra-fine fibers were observed by transmission electron microscopy (TEM). The morphology and diameter of Au NPs/CA fibers were studied by scanning electron microscopy (SEM). The crystallinity change of CA fiber before and after adding Au NPs was characterized by X-ray diffraction (XRD).

scholarly journals Studies on the treatment of surface water using rajma seeds

2018 ◽  
Vol 13 (s1) ◽  
pp. 7-13
Author(s):  
S. Babitha Merlin ◽  
M. Abirami ◽  
R. Suresh Kumar
Keyword(s):  
Surface Water ◽  
Settling Time ◽  
Optimum Dose ◽  
Turbidity Removal ◽  
Coagulation Process ◽  
Natural Coagulants ◽  
Indiscriminate Disposal ◽  
Surface Water Samples ◽  
By Products ◽  
Natural Water Bodies

Abstract Indiscriminate disposal of wastewater with suspended solids have led to higher amount of pollution to the natural water bodies. Turbidity removal becomes an essential part in the water treatment when surface water is used for drinking purpose, this can be achieved by means of coagulation process. Coagulation process is the dosing of a coagulant in water, resulting in the destabilization of negatively charged particles. Commercial coagulants which were widely used can synthesize by-products in turn may pollute the environment and deteriorate the ecosystem at a slow rate. So, now-a-days natural coagulants are used as a potential substitute because it’s biodegradable, ecofriendly and non-toxic. In this study, the turbid surface water samples were treated using powdered seeds of Rajma (natural coagulant) followed by variations in dosage, settling time and pH were also studied. From the results obtained, it was found that the Rajma seeds powder achieved 48.80% efficiency for 0.5 g/l of optimum dose at pH 6 for 20 min settling time respectively.

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