INFLUENCE OF HOUSEHOLD AND INDUSTRIAL EFFLUENTS OF AGLOMERATION PETROPAVLOVSK-KAMCHATSKY-ELIZOVO-VILYUCHINSK ON ENVIRONMENTAL SAFETY IN AVACHINSKAYA GOBA (SOUTH-EAST KAMCHATKA)

2021 ◽  
pp. 8-20
Author(s):  
A.N. Kashutin
Keyword(s):  
Industrial Effluents ◽  
Environmental Safety

scholarly journals Amine-grafted Walnut Shell for Efficient Removal Phosphate and Nitrate from Aqueous Solution

2021 ◽  
Author(s):  
Evans Dovi ◽  
Aaron Albert Aryee ◽  
Jianjun Li ◽  
Zhaohui Li ◽  
Lingbo Qu ◽  
...  
Keyword(s):  
Electrostatic Interactions ◽  
Industrial Effluents ◽  
Environmental Safety ◽  
Water Bodies ◽  
Walnut Shell ◽  
Uptake Capacity ◽  
Effective Removal ◽  
Characterization Studies ◽  
Lower Temperature ◽  
The Individual

Abstract The presence of emerging pollutants such as PO43− and NO3− in water bodies has attracted worldwide concern about their severe effects on water bodies and the health of humankind in general. Therefore, to preserve the health of humankind and environmental safety, it is of the essence that industrial effluents are treated before they are discharged into water bodies. To accomplish this, the walnut shell was functionalized (ACWNS) with amine for effective removal of PO43− and NO3−. Characterization studies of ACWNS were conducted using FTIR, XRD, XPS and BET techniques. Removal of both ions was enhanced at lower temperature (293 K). The maximum uptake capacity of phosphate and nitrate, at 293 K, was 82.2 and 35.7 mg g− 1, respectively. The primary mechanism by which these ions were uptaken onto ACWNS could be electrostatic interactions and hydrogen bonding.Pseudo-second-order kinetics fitted the PO43̶ and NO3− adsorption, while Freundlich and Langmuir models best fitted the PO43̶ and NO3̶ adsorption, respectively. Furthermore, in the binary system, the uptake capacity of phosphate decreased by 14.4% while nitrate witnessed a reduction in its uptake capacity by 10.4 %. So ACWNS has a higher attraction towards both ions and this could be attributed to the existence of a variety of active areas on ACWNS that exhibit a degree of specificity for the individual anions. Results obtained from real water samples analysis confirmed ACWNS as highly efficient to be utilized for practical remediation processes.

scholarly journals Fixed-bed Adsorption of Congo red dye and Bisphenol A from solution onto surfactant modified walnut shell

2021 ◽  
Author(s):  
Evans Dovi ◽  
Aaron Albert Aryee ◽  
Alexander Nti Kani ◽  
Farid Mzee Mpatani ◽  
Jianjun Li ◽  
...  
Keyword(s):  
Flow Rate ◽  
Endocrine Disrupting Chemicals ◽  
Fixed Bed ◽  
Industrial Effluents ◽  
Environmental Safety ◽  
Low Flow ◽  
Walnut Shell ◽  
Synthetic Dyes ◽  
Living Organisms ◽  
Agricultural Byproduct

Abstract Wastewater stemming from industries may contain pollutants such as synthetic dyes and endocrine-disrupting chemicals which are known to be harmful to living organisms. Therefore, to safeguard the wellbeing of humankind and environmental safety, it is imperative for industrial effluents to be sanitized before their discharged into water bodies. Furthermore, to explore the utilization of agricultural byproduct is valuable to study. To achieve this, a Cetyltrimethylammonium bromide functionalized Walnut shells (WNS-CTAB) were prepared to remove pollutants in column approach. The column work was carried out for diverse working conditions. There is in favor of adsorption at low influent pollutant concentration, low flow rate or high bed depth. As the highest breakthrough time of 113 and 23 min at flow rate 6 mL min −1 was recorded for both CR and BPA, respectively, the Yan’s kinetic model best described the breakthrough curve. The adsorbent showed better regeneration capabilities; accordingly can offer practical use for adsorption of CR and BPA from wastewaters.

scholarly journals Improving the efficiency of technological processes for the treatment of highly concentrated wastewater to ensure environmental safety

2021 ◽  
Vol 274 ◽  
pp. 06007
Author(s):  
Svetlana Andreeva
Keyword(s):  
Industrial Effluents ◽  
Environmental Safety ◽  
Treated Wastewater ◽  
Organic Substances ◽  
Oxidation Index ◽  
Separate Layer ◽  
Organic Impurities ◽  
Final Treatment ◽  
Wastewater Pollution ◽  
Biological Methods

The complexity of biochemical wastewater treatment is most often due to the presence of a large number of organic impurities, causing the death of the biological community of activated sludge microorganisms. Application of the method of lowering the pH of industrial effluents to minimum value reduces the solubility of organic substances in water, separating them into a separate layer of emulsified wastewater. In this case, the process of removing organic impurities from treated wastewater becomes the most accessible, but also requires solving the problems of technological and environmental safety. Dissolution of wastewater organic impurities separated into a separate layer a solvent – the extractant followed by the extraction of organic components extracted from it, reduces the level of wastewater pollution with organic substances according to the oxidation index (COD) to an acceptable level. The technology of the applied method allows for the final treatment using biological methods; and practically constructively mounts and build a new modernized technological line.

scholarly journals Nutrient removal capacity of wood residues for the Agro-environmental safety of ground and surface waters

2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Paulo A. Dumont ◽  
David. R. Chadwick ◽  
Steve Robinson
Keyword(s):  
Municipal Wastewater ◽  
Industrial Effluents ◽  
Environmental Safety ◽  
Exchange Capacity ◽  
Removal Capacity ◽  
N Removal ◽  
Wood Residues ◽  
Wide Range ◽  
And Performance ◽  
Desorption Capacity

Abstract   The aim of this study was to determine the effectiveness of wood residues in the removal of nutrients (ammonium-N; NH4-N) from nutrient-rich (NH4-N) waters. The water holding capacity of the wood materials was also determined. Carried out at Rothamsted Research, North Wyke, UK, this controlled laboratory experiment tested two wood residues; in length, one being 1-2cm and the other from 150 µm (microns) to 9.5mm. Although a wide range of studies have shown the effectiveness and performance of various absorbent materials as animal beddings, such as straw (cereal straw), woodchip (sawdust, bark or wood shavings), bracken and rushes, only few have focused on the NH4-N sorption/desorption capacity. The depuration capacity of wood residues from nutrient-rich effluents such as those from cattle bedded on woodchip or straw will be controlled by processes such as sorption (adsorption-absorption) and desorption of nutrients. Studies have reported the nitrogen removal capacity of woodchip materials and biochar from woodchip as well as removal of NH4+-N from domestic and municipal wastewater, farm dirty water, landfill and industry effluents. These studies have observed that the mechanism of removal of nitrogen is by either increasing NO3--N removal form leachate by enhancing N2O losses via denitrification (biochar as carbon source for denitrifiers) or by decreasing NH4+-N in leachate through adsorption to negatively charged sites. Results showed that although the cation exchange capacity (CEC) and surface area (SA) are both fundamental properties of adsorbent materials, no correlation was found with CEC and adsorption or desorption. Nor did changes in pH appear to be sufficiently important to cause changes in CEC. For this reason, osmotic pressure appeared to be a more predominant parameter controlling processes of adsorption and desorption of NH4+-N in both wood residues. Thus, wood residues high in NH4+-N should be avoided, as they could have an opposite effect in the adsorption of nutrients from nutrient-rich effluents. The results also showed that some wood residues (G30) had great capacity to adsorb NH4+-N to levels up to nearly 90% whilst demonstrating low desorption capacity of NH4+-N (less than 1%). These are ideal relevant features for an adsorbent material for the removal of nutrients (or heavy metals) from contaminated waters such us farm o industrial effluents, or for the depuration of eutrophic watercourses. This could help reduce the concentration of farm effluents making them more manageable, subsequently contributing towards the compliance of new environmental regulations. Keywords: nutrients, nitrogen, ground and surface water

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

Resilience among adolescents within the child protective services system: A focus on environmental safety

2008 ◽  
Author(s):  
Sofia R. Pannia ◽  
Christine M. Wekerle ◽  
Randy Waechter ◽  
Eman Leung ◽  
Maria M.N. Chen
Keyword(s):  
Child Protective Services ◽  
Environmental Safety ◽  
Protective Services ◽  
System A

THE NATURE OF LEGAL RESTRICTIONS IN ENVIRONMENTAL LAW

2019 ◽  
pp. 142-150
Author(s):  
Galyna Moroz
Keyword(s):  
Environmental Law ◽  
Functional Results ◽  
Environmental Safety ◽  
Educational Process ◽  
Practical Significance ◽  
Practical Implementation ◽  
The Status ◽  
Environmental Requirements ◽  
Content System ◽  
Legal Restrictions

Purpose. The article is aimed at analyzing the general theoretical principles and the essential characteristics of legal restrictions in environmental law; defining category of “environmental legal restrictions”, their content, system and the status of the respective legislation. Methodology. The methodology consists in carrying out a comprehensive analysis of the provisions of environmental legislation and formulating relevant conclusions on this basis. During the research, the following methods of scientific research were used: terminological, systemic and structural, comparative legal, structural and functional. Results. The objectively determined necessity of unconditional adherence to the legally established environmental requirements, prohibitions and restrictions as well as their potential scientifically substantiated enhancement in order to achieve environmentally significant goals oriented towards the priorities of sustainable development is substantiated. Restrictive mechanisms are scattered across statutory and regulatory acts of different legal force and even different branches of law, therefore, the need for their systematization and unification as well as generalization of the experience of their practical implementation in order to establish a comprehensive system of environmental restrictions is discussed. In our opinion, the conceptual basis and general essential characteristics of public environmental requirements and restrictions should be reflected in the future Environmental Code of Ukraine. Scientific novelty. In the course of the research, the author defines restrictions in environmental law as a specific sectoral imperative mechanism for regulating relations in the field of environmental safety, which consists in systematically introducing legislation on imperative provisions of environmental law as well as establishing specific legal regimes and mechanisms for their application and implementation. Practical significance. The main conclusions can be used in law-making and law-enforcing activities, as well as in further theoretical and legal research and in the educational process.

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