scholarly journals Effect of Soil Texture on Remediation of Hydrocarbons-Contaminated Soil at El-Minia District, Upper Egypt

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Th. Abdel-Moghny ◽  
Ramadan S. A. Mohamed ◽  
E. El-Sayed ◽  
Shoukry Mohammed Aly ◽  
Moustafa Gamal Snousy
Keyword(s):  
Contaminated Soil ◽  
Heterogeneous Media ◽  
High Efficiency ◽  
Soil Heterogeneity ◽  
Experimental Models ◽  
Clay Loam ◽  
Water Washing ◽  
Drinking Water Resources ◽  
Washing Process ◽  
Surfactant Flushing

Soils polluted by waste lubricant oils may affect the hydrosphere compromising the quality of drinking water resources and threatening the aquatic ecosystems. The objective of this study focused to remove waste-lubricant oils from different polluted sites in El-Minia governorate. In this respect some samples were collected from four different industrial sites and identified as sand, loamy sand, clay loam and loam. Then the field conditions were simulates using two experimental models packed with contaminated soil. The remediation processes carried out in both models using surfactant enhanced by air injection then by water washing. The parameters such as soil type, soil heterogeneity, time and washing process was investigated. The results indicated that the high efficiency of oil removal is obtained from sand where the clay loam gives the worst results. The results also reveal that, the high flushing and washing duration time can be attributed to the high percentage of mud in some sites over other sites. This means that the performance of surfactant flushing/water washing can be adversely affected by geologic heterogeneity. Finally, it’s suitable to use pressurized liquid technologies in heterogeneous media, but cleanup times will be longer and more difficult than for the other similar homogeneous media.

scholarly journals Tannic acid-functionalized HEPA filter materials for influenza virus capture

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Subin Kim ◽  
Jinhyo Chung ◽  
Sang Hyun Lee ◽  
Jeong Hyeon Yoon ◽  
Dae-Hyuk Kweon ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Tannic Acid ◽  
High Efficiency ◽  
Influenza Viruses ◽  
Capture Efficiency ◽  
Protective Equipment ◽  
Filter Materials ◽  
Washing Process ◽  
Pathogenic Viruses ◽  
Cost Efficient

AbstractInfluenza, one of the most contagious and infectious diseases, is predominantly transmitted through aerosols, leading to the development of filter-based protective equipment. Though the currently available filters are effective at removing submicron-sized particulates, filter materials with enhanced virus-capture efficiency are still in demand. Coating or chemically modifying filters with molecules capable of binding influenza viruses has received attention as a promising approach for the production of virus-capturing filters. For this purpose, tannic acid (TA), a plant-derived polyphenol, is a promising molecule for filter functionalization because of its antiviral activities and ability to serve as a cost-efficient adhesive for various materials. This study demonstrates the facile preparation of TA-functionalized high-efficiency particulate air (HEPA) filter materials and their efficiency in influenza virus capture. Polypropylene HEPA filter fabrics were coated with TA via a dipping/washing process. The TA-functionalized HEPA filter (TA-HF) exhibits a high in-solution virus capture efficiency of up to 2,723 pfu/mm2 within 10 min, which is almost two orders of magnitude higher than that of non-functionalized filters. This result suggests that the TA-HF is a potent anti-influenza filter that can be used in protective equipment to prevent the spread of pathogenic viruses.

scholarly journals Design of a High-Power High-Efficiency Multi-Receiver Wireless Power Transfer System

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1308
Author(s):  
Yuyu Zhu ◽  
Hanyu Zhang ◽  
Zuming Wang ◽  
Xin Cao ◽  
Renyin Zhang
Keyword(s):  
Power Distribution ◽  
Power Flow ◽  
High Efficiency ◽  
Control Method ◽  
Experimental Models ◽  
Wireless Power ◽  
Multiple Receivers ◽  
Combined Operation ◽  
Wireless Power Transfer System ◽  
Good Agreement

This paper proposes a new control method to regulate the power flow into multiple receivers. This system consists of one transmitter controller and three receiver controllers. They work independently to decide the power distribution with their combined operation. The simulated and experimental models have been built, and the experimental results are in good agreement with the theoretical analysis results. The proposed method is robust, flexible, and generalizable, and can be employed under various wireless charging conditions.

Simulated formation and flow of microemulsions during surfactant flushing of contaminated soil

2002 ◽  
Vol 36 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Ying Ouyang ◽  
Jong Soo Cho ◽  
Robert S Mansell
Keyword(s):  
Contaminated Soil ◽  
Surfactant Flushing

Optimizing Water Washing Process for Sunflower Heads before Pectin Extraction

1996 ◽  
Vol 61 (3) ◽  
pp. 608-612 ◽  
Author(s):  
X.Q. SHI ◽  
K.C. CHANG ◽  
J.G. SCHWARZ ◽  
D. WIESENBORN ◽  
M.C. SHIH
Keyword(s):  
Water Washing ◽  
Washing Process

scholarly journals Optimizing soil washing remediation of mercury contaminated soil using various washing solutions and solid/liquid ratios

2020 ◽  
Vol 148 ◽  
pp. 05004
Author(s):  
Agus Jatnika Effendi ◽  
Vina Lestari ◽  
Mohammad Irsyad
Keyword(s):  
Distribution Coefficient ◽  
Potassium Iodide ◽  
Contaminated Soil ◽  
Soil Washing ◽  
Mercury Contamination ◽  
Small Scale ◽  
Gold Extraction ◽  
Washing Process ◽  
Fractionation Analysis ◽  
Solid Liquid

Most of the artisanal and small-scale gold miners in Indonesia as in the case of those who are in Banten Province, still use the amalgamation process in the gold extraction process. Therefore, mercury contamination could not be avoided. As a result, it was found that the concentration of mercury-contaminated soil in Lebak, Banten Province was detected as high as 136,9 mg/kg. Since the contamination process occurred for a long time, making the formation and mobility of complex mercury in soil increased by time. Soil washing is one remediation technology that can be applied in the recovery of mercury-contaminated soil. This study aims to determine the optimum conditions of the soil washing process: effect of pH, the concentration of washing solutions and ratio of solid/liquid. Furthermore, the value of the distribution coefficient, desorption of mercury in the soil and fractionation of mercury in the soil were also observed. Potassium Iodide was found to be the best washing solution among others used in this study. The optimum condition was obtained at pH 2, the concentration of washing solution at 0.25 M and the solid/liquid ratio of 1:15. Under these conditions, mercury desorption efficiency reached 86.9% with the value of the distribution coefficient of 0.185. Mercury fractionation analysis in the contaminated soil showed that the mobile > semi-mobile > non-mobile fractions. Potassium iodide was able to desorb at about 84% of mobile fractions, 97% of semi-mobile and 25% non-mobile mercury.

scholarly journals Chlorides Removal and Control through Water-washing Process on MSWI Fly Ash

2016 ◽  
Vol 31 ◽  
pp. 560-566 ◽  
Author(s):  
Xiongfei Chen ◽  
Yafan Bi ◽  
Hongbo Zhang ◽  
Jia Wang
Keyword(s):  
Fly Ash ◽  
Mswi Fly Ash ◽  
Water Washing ◽  
Washing Process ◽  
And Control

scholarly journals Nicotinamide Riboside for the Prevention and Treatment of Doxorubicin Cardiomyopathy. Opportunities and Prospects.

2021 ◽  
Author(s):  
Ekaterina Podyacheva ◽  
Yana Toropova
Keyword(s):  
High Efficiency ◽  
Experimental Models ◽  
Symptomatic Therapy ◽  
Vitamin B3 ◽  
Nicotinamide Riboside ◽  
Independent Form ◽  
Oncological Diseases ◽  
Hematological Tumors ◽  
Late Stages ◽  
Doxorubicin Cardiomyopathy

Abstract Despite the progress in the development of new anticancer strategies, cancer is rapidly spreading around the world and remains one of the most common diseases. At the same time, oncological diseases are detected in patients with late stages of the course in the overwhelming majority of cases. This fact necessitates chemotherapy both as part of a combination and in the view of an independent form of treatment. For more than 40 years, doxorubicin has been widely used in the treatment of solid and hematological tumors. At the same time, the problem of its cardiotoxicity remains unresolved, despite the high efficiency of this drug. Symptomatic therapy is used as a treatment for side-effects of doxorubicin or pathological conditions that have already appeared on their background. To date, there are no treatment methods for doxorubicin cardiomyopathy as such. A drug such as nicotinamide riboside can play an important role in solving this problem. Nicotinamide riboside is a pyridine nucleoside similar to vitamin B3 that acts as a precursor to NAD+. There are no such works in cardiomyopathy, despite the abundance of works devoted to the mechanisms of realization of the effects of nicotinamide riboside in various pathologies. The review analyzes information about the effects of NR on various experimental models of pathologies, its role in the synthesis of NAD+, and also considers the possibility and prospects of its use for the prevention of doxorubicin cardiomyopathy.

Sign in / Sign up

Export Citation Format

Share Document