Regeneration of Calcium Alginate and Chitosan Coated Calcium Alginate Sorbents to be Reused for Lead (II) Removal from Aqueous Solutions

2017 ◽  
Vol 68 (9) ◽  
pp. 1992-1996 ◽  
Author(s):  
Noor Edin Mousa ◽  
Claudia Maria Simonescu ◽  
Rodica Elena Patescu ◽  
Vasile Lavric ◽  
Daniela C. Culita
Keyword(s):  
Sorption Capacity ◽  
Calcium Alginate ◽  
Environmental Remediation ◽  
High Selectivity ◽  
Research Study ◽  
Polluted Water ◽  
Chemical Methods ◽  
Fundamental Properties ◽  
Water And Wastewater ◽  
Physical And Chemical

The application of biopolymer-based sorbents in solving some environmental problems such as the removal and recovery of heavy metals from natural polluted water and wastewater has received lately a lot of attention due to their unique characteristics. The fundamental properties that recommend the usage of biopolymers-based sorbents for environmental remediation are: high selectivity and sorption capacity, renewability, safe manipulation, sorption capacity increase through simple physical and chemical methods, easy separation from treated water, and easy regeneration and reuse for repetitive sorption-desorption cycles. Accordingly, this research study has as purpose to present the results related to the usage of two types of alginate sorbents (calcium alginate and chitosan coated calcium alginate) in four repetitive lead(II) ions sorption-desorption cycles and to examine the influence of desorption agents on structural sorbent�s characteristics. The results obtained showed that both calcium alginate and chitosan coated calcium alginate are good stable sorbents to be used in lead(II) ions sorption-desorption cycles.

scholarly journals Detecting Fingerprints of Waterborne Bacteria on a Sensor

Chemosensors ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 33 ◽  
Author(s):  
Saylan ◽  
Erdem ◽  
Cihangir ◽  
Denizli
Keyword(s):  
Large Scale ◽  
High Selectivity ◽  
Chemical Properties ◽  
Surface Proteins ◽  
Polluted Water ◽  
Label Free ◽  
Recognition Element ◽  
Modification Method ◽  
Physical And Chemical ◽  
And Chemical Properties

Human fecal contamination is a crucial threat that results in difficulties in access to clean water. Enterococcus faecalis is a bacteria which is utilized as an indicator in polluted water. Nevertheless, existing strategies face several challenges, including low affinity and the need for labelling, which limit their access to large scale applications. Herein, a label-free fingerprint of the surface proteins of waterborne bacteria on a sensor was demonstrated for real-time bacteria detection from aqueous and water samples. The kinetic performance of the sensor was evaluated and shown to have a range of detection that spanned five orders of magnitude, having a low detection limit (3.4 × 104 cfu/mL) and a high correlation coefficient (R2 = 0.9957). The sensor also designated a high selectivity while other competitor bacteria were employed. The capability for multiple usage and long shelf-life are superior to other modalities. This is an impressive surface modification method that uses the target itself as a recognition element, ensuring a broad range of variability to replicate others with different structure, size and physical and chemical properties.

Modification of Collagen for Biomedical Applications: A Review of Physical and Chemical Methods

2016 ◽  
Vol 20 (17) ◽  
pp. 1797-1812 ◽  
Author(s):  
Xiaoyue Yu ◽  
Cuie Tang ◽  
Shanbai Xiong ◽  
Qijuan Yuan ◽  
Zhipeng Gu ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Chemical Methods ◽  
Physical And Chemical

Biomedical Applications and Patents on Metallic Nanoparticles

2020 ◽  
Vol 10 ◽  
Author(s):  
Geetanjali Singh ◽  
Pramod Kumar Sharma ◽  
Rishabha Malviya
Keyword(s):  
Metallic Nanoparticles ◽  
Biomedical Applications ◽  
Size Range ◽  
Biomedical Application ◽  
Chemical Reduction ◽  
Chemical Methods ◽  
Future Challenges ◽  
Biological Methods ◽  
Cancer Diagnosis And Therapy ◽  
Physical And Chemical

Aim/Objective: The author writes the manuscript by reviewing the literatures related to the biomedical application of metallic nanoparticles. The term metal nanoparticles are used to describe the nanosized metals with the dimension within the size range of 1-100 nm. Methods: The preparation of metallic nanoparticles and their application is an influential area for research. Among various physical and chemical methods (viz. chemical reduction, thermal decomposition, etc.) for synthesizing silver nanoparticles, biological methods have been suggested as possible eco-friendly alternatives. The synthesis of metallic nanoparticles is having many problems inclusive of solvent toxicity, the formation of hazardous byproducts and consumption of energy. So it is important to design eco-friendly benign procedures for the synthesis of metallic nanoparticles. Results: From the literature survey, we concluded that metallic nanoparticles have applications in the treatment of different diseases. Metallic nanoparticles are having a great advantage in the detection of cancer, diagnosis, and therapy. And it can also have properties such as antifungal, antibacterial, anti-inflammatory, antiviral and anti-angiogenic. Conclusion: In this review, recent upcoming advancement of biomedical application of nanotechnology and their future challenges has been discussed.

scholarly journals Decreasing Oxalate Levels in Kimpul Tubers (Xanthosoma sagittifolium) by Physical and Chemical Methods

2021 ◽  
Vol 667 (1) ◽  
pp. 012015
Author(s):  
I Sulaiman ◽  
C Annisa ◽  
Y M Lubis ◽  
Z F Rozali ◽  
S Noviasari ◽  
...  
Keyword(s):  
Chemical Methods ◽  
Xanthosoma Sagittifolium ◽  
Physical And Chemical

COMPARAISON DE DIVERSES METHODES DE CASTRATION ET DE STERILISATION DES AGNEAUX: I. INFLUENCE DE CES METHODES SUR LA CROISSANCE, L’EFFICIENCE ALIMENTAIRE, LE RENDEMENT A L’AHATTAGE ET LA RENTABILITE

1971 ◽  
Vol 51 (3) ◽  
pp. 579-589 ◽  
Author(s):  
J. M. BAILLARGEON ◽  
J. P. LEMAY ◽  
W. B. HOLTMANN ◽  
L. A. CHARETTE
Keyword(s):  
Feed Efficiency ◽  
Intramuscular Injection ◽  
Cadmium Chloride ◽  
Complete Removal ◽  
Chemical Methods ◽  
Treatment Groups ◽  
Dressing Percentage ◽  
Breeding Groups ◽  
Physical And Chemical ◽  
Daily Gain

An experiment was conducted to compare various physical and chemical methods of castration of lambs at 15 and 60 days of age. Their effects on body growth, feed efficiency, dressing percentage and profitability were studied. At birth 100 lambs were divided among the 16 different treatments according to sex and the following breeding groups: Suffolk, North Country Cheviot, two-breed cross and three-breed cross. The different methods of castration were: complete removal of the testicles, Burdizzo, elastrator and partial castration. The sterilization methods consisted of intramuscular, intratesticular and intraveinous injection of cadmium chloride. All lambs were weaned at 30 days of age and placed in individual pens. They were subjected to similar environmental conditions and shipped to slaughter at approximately 45 kg body weight. Significant differences were observed among breeds, sexes and the various castration methods for daily gain, feed efficiency, days required to reach market and profitability. Age at castration did not have any important effect ort the variables measured. Superior gains, feed efficiency and profitability were observed for the partially castrated group, for the lambs that received an intramuscular injection of cadmium chloride and for the non-castrated males. All treatment groups involving males were superior to the females for the characters studied except for dressing percentage.

SUBSTANTIATION OF THE TECHNOLOGICAL SCHEME FOR PRODUCING LIQUID SUGAR FROM SEMI-PRODUCTS OF BEET SUGAR PRODUCTION

2019 ◽  
Author(s):  
Р.С. Решетова ◽  
О.Ю. Бганцева
Keyword(s):  
Food Production ◽  
Technological Scheme ◽  
Preliminary Treatment ◽  
Sugar Solution ◽  
Sugar Production ◽  
Chemical Methods ◽  
Storage Duration ◽  
Number Of Microorganisms ◽  
Permissible Levels ◽  
Physical And Chemical

Разработана технологическая схема получения жидкого сахара из полупродуктов свеклосахарного производства, которая предусматривает получение исходного (концентрированного) сахарного раствора из сиропа после выпарки, некондиционного сахара и желтого сахара последнего продукта с содержанием сухих веществ (СВ) от 68 до 72. Изучено изменение количества микроорганизмов в жидком сахаре в течение 30 сут хранения в закрытых сосудах при температуре окружающей среды без предварительной обработки физическим и химическим способами с целью использования сиропа при производстве пищевых продуктов. Установлено, что в растворе с содержанием СВ 68 72 количество микроорганизмов увеличилось: бактерий с 15 до 60 КОЕ/г, дрожжей и плесневых грибов с 10 до 34 КОЕ/г, что не превышает допустимых уровней СанПиН 2.3.2.1078 01 и ГОСТ Р 53035 2008. Определена длительность хранения жидкого сахара для использования в пищевых производствах не более 15 сут. The technological scheme of obtaining liquid sugar from semiproducts of sugar beet production, which provides for obtaining the initial (concentrated) sugar solution from the syrup after evaporation, substandard sugar and yellow sugar of the last product with a content of dry matters from 68 to 72, has been developed. The change in the number of microorganisms in liquid sugar was studied during 30 days of storage in closed vessels at ambient temperature without preliminary treatment by physical and chemical methods with the aim of using syrup in food production. It was found that in the solution with the content of dry matters 68 72 the number of microorganisms increased: bacteria from 15 to 60 CFU/g, yeast and fungi from 10 to 34 CFU/g, which does not exceed the permissible levels of SanPiN 2.3.2.1078 01 and GOST R 53035 2008. The storage duration of liquid sugar for use in food production was determined no more than 15 days.

scholarly journals Feasibility of nanoscale zero-valent iron loaded sediment-based biochar (nZVI-SBC) for simultaneous removal of nitrate and phosphate: high selectivity towards dinitrogen and synergistic mechanism

2021 ◽  
Author(s):  
Xiaohui Liu ◽  
Jia Wei ◽  
Liangang Hou ◽  
Yuhan Zhu ◽  
Yaodong Wu ◽  
...  
Keyword(s):  
High Selectivity ◽  
Phosphate Removal ◽  
Zero Valent Iron ◽  
Polluted Water ◽  
Nitrogen And Phosphorus ◽  
Nanoscale Zero Valent Iron ◽  
Synergistic Mechanism ◽  
Loading Ratio ◽  
Anoxic Environment ◽  
Complexation Mechanism

Abstract In the process of water treatment, excessive nitrogen and phosphorus pollutants are of great concern. Therefore, we prepared nanoscale zero-valent iron loaded on sediment-based biochar (nZVI-SBC) to conduct nitrate and phosphate removal at the same time. The characterization demonstrated that nZVI-SBC was successfully synthesized, which had obvious advantages for larger specific surface area and better dispersion compared with pure nZVI. The batch experiments indicated that the best loading ratio of nZVI to SBC and optimum dosage for nitrate and phosphate were 1:1and 2 g·L-1, respectively. Their removal by nZVI-SBC was an acid-driven process. Anoxic environment was more conducive to the reduction of nitrate while the phosphate removal was fond of oxygen environment. 77.78% of nitrate and 99.21% of phosphate have been successfully removed, mainly depending on reduction and complexation mechanism, respectively. Moreover, nZVI-SBC had higher N2 selectivity and produced less ammonium than nZVI. The interaction between nitrate and phosphate was studied to manifest that they had different degrees of inhibition during the removal of the other. Our research indicated that nZVI-SBC has great potential for remediation of nitrogen and phosphorus polluted water.

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