scholarly journals BIOREMEDIATION: THE ECO-FRIENDLY SOLUTION TO THE HAZARDOUS PROBLEM OF ENVIRONMENTAL POLLUTION

2021 ◽  
Vol 29 (4) ◽  
pp. 477-483
Author(s):  
Susmita Mukherjee ◽  
Rajiv Narula ◽  
Shreya Bhattacharjee ◽  
Debankita Dutta ◽  
Indrani Bose ◽  
...  

Bioremediation is a technique to enhance natural biological processes to rectify polluted groundwater, soil, and even entire habitats. Bioremediation techniques use biological agents to act upon hazardous, toxic materials and subsequently convert them into less toxic substances. Microbes are organisms ubiquitously present in the biosphere. These microorganisms are the main agents that remediate toxic and polluted environmental conditions. Highly polluted areas can be rectified using proper bioremediation procedures and interventions. In this review we have studied the different bioremediation techniques which can be utilized to correct the harmful effects of environmental pollution. In this study we have also emphasized on the benefits of adopting bioremediation as an efficient alternative technique in comparison to the traditional physical and chemical methods to restore the healthy environmental conditions.

2020 ◽  
pp. 465-470
Author(s):  
Hutoryanina ◽  
Dumbadze ◽  
Dimidova

The problem of environmental pollution has now acquired global significance. Helminth eggs in liquid manure laid in open-type sedimentation tanks in October-November, remain viable for 12 months or more, and in spring-summer manure for 4–5 months. Therefore, uninfected liquid manure in both winter and summer poses a serious threat of contamination of reservoirs, soil, groundwater, feed and pastures with dangerous pathogens for humans and animals. This circumstance makes it necessary to carry out disinfestation of manure of all categories. Based on the above, the purpose of the work was to analyze existing methods of manure disinfection and manure effluents. All methods of deworming (disinvasion) of manure and its fractions can be divided into three groups: biological, physical and chemical. It is generally recognized that biological methods for decomposing organic waste are considered environmentally acceptable and cost-effective. Some of the analyzed physical and chemical methods also have a certain effectiveness of disinfection. When using these groups of disinfectants, constant monitoring and compliance with technological parameters is necessary, as well as the norms for the consumption of disinfectants and the exposure time must be observed.


2016 ◽  
Vol 20 (17) ◽  
pp. 1797-1812 ◽  
Author(s):  
Xiaoyue Yu ◽  
Cuie Tang ◽  
Shanbai Xiong ◽  
Qijuan Yuan ◽  
Zhipeng Gu ◽  
...  

Author(s):  
Geetanjali Singh ◽  
Pramod Kumar Sharma ◽  
Rishabha Malviya

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.


2021 ◽  
Vol 667 (1) ◽  
pp. 012015
Author(s):  
I Sulaiman ◽  
C Annisa ◽  
Y M Lubis ◽  
Z F Rozali ◽  
S Noviasari ◽  
...  

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
M Company-Morales ◽  
A Fontalba-Navas ◽  
M F Rubio-Jimenez ◽  
V Gil-Aguilar ◽  
J P Arrebola

Abstract Introduction Persistent Toxic Substances (PTS) are substances that are characterized by the cumulative effect at low doses inside the body. Exposure to PTS in pregnant and breastfeeding women, through food consumption, shows various harmful effects on the health of the mother, the fetus and the baby. The objective of this article is to analyze how pregnant and breastfeeding women perceive the presence of chemical substances in food and reflect on the accumulation, transmission and elimination of these substances. Methodology Descriptive and interpretive study under the qualitative research paradigm following a phenomenological and ethnographic perspective. As instruments to obtain the primary data we rely on 111 semi-structured interviews with pregnant and breastfeeding women, 4 focused ethnographies, 8 focus groups (63 women), 71 feeding diaries, 71 free listings. To encode the content of the speeches of pregnant and nursing women we rely on the N-Vivo 12 software. Results Pregnant and breastfeeding women are concerned about food quality controls. Women trust on local and seasonal foods such as fresh fruits and vegetables from non-extensive crops and close to their home. Foods that produce distrust in women are processed, packaged foods, red meat and large fish. The latter foods promote in women a perception of risk of contamination by chemical substances, manifesting a defenseless situation to maintain a diet without contaminants. Conclusions Pregnant and breastfeeding women in Spain have no information on the risk and danger of synthetic chemicals or PTS, with the exception of certain toxic substances such as mercury present in large fish. Women maintain a duality in their own care and that of the fetus or child. This circumstance implies that the women interviewed believe that PTS and synthetic chemicals may have different harmful effects on the mother and the degree of growth of the fetus and, subsequently, of the baby. Key messages Future mothers are worried about the type of product they eat, knowing that food influences healthy growth and development of the fetus. Pregnant and breastfeeding women often distrust “processed” or “industrial” foods, which they tend to associate with low quality and large amounts of additives and chemical substances.


1971 ◽  
Vol 51 (3) ◽  
pp. 579-589 ◽  
Author(s):  
J. M. BAILLARGEON ◽  
J. P. LEMAY ◽  
W. B. HOLTMANN ◽  
L. A. CHARETTE

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.


Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Máté Osvald ◽  
Gergely Maróti ◽  
Bernadett Pap ◽  
János Szanyi

Reinjection of heat-depleted thermal water has long been in the center of scientific interest in Hungary regarding around 1000 operating thermal wells. While the physical and chemical aspects of reinjection have partly been answered in the past years, the effects of biological processes are still less known. We carried out our investigations in the surface elements of the Hódmezővásárhely geothermal system which is one of the oldest operating geothermal systems in Hungary. About one-third of the used geothermal water has been reinjected since 1998 by two reinjection wells at the end of the thermal loops. During the operation, plugging of the surface system was experienced within a few-day-long period, due to biological processes. The goal of our research was to find the dominant species of the microbial flora and to make a proposal to avoid further bacterial problems. We found that the reinjected, therefore the produced, water’s chemical oxygen demand, phenol index, and BTEX composition basically determine the appearing flora on the surface. When the concentration of these compounds in the thermal water is significant and residence time is long enough in the buffer tank, certain bacteria can be much more dominant than others, thus able to form a biofilm which plugs the surface equipment much more than it is expected.


Author(s):  
Р.С. Решетова ◽  
О.Ю. Бганцева

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.


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