scholarly journals Bioremediation Of Polluted Waters Using Nanoparticles

2022 ◽  
Vol 24 (1) ◽  
pp. 1-33
Author(s):  
M. Meenakshi ◽  
Keyword(s):  
Water Pollution ◽  
Inorganic Compounds ◽  
Cost Effective ◽  
Growth Potential ◽  
Wastewater Remediation ◽  
Plant Laboratory ◽  
Long Term Effect ◽  
Cost Effective Approach ◽  
Polluted Waters

Water pollution is an issue of great concern worldwide, contamination by organic compounds, inorganic compounds and microorganisms. Bioremediation using microorganisms helps in the removal of toxic metals from the environment. The focus is on the heavy metals associated with environmental contamination, lead (Pb), cadmium (Cd), and chromium (Cr) which are potentially hazardous to ecosystems. In the present study textile effluent was collected, and subjected to Physicochemical treatment methods , Herbal-Metal nanocomposite was prepared and used to treat textile effluents. As a bioremediation study, the plant growth potential of treated effluents was evaluated using pot studies of an aquatic plant .Laboratory and field test results confirmed superior bioremediation efficiency and long-term effect. When compared to today’s most-efficient bioremediation technologies there is an efficient, fast, safe, and inexpensive way to clean up polluted waters through acceleration of natural bioremediation process. Nanotechnology provides an economical, convenient and ecofriendly means of wastewater remediation. The results obtained in this study shall be carried out as future studies using different types and concentrations of nanoparticles for the treatment of any types of effluents causing land and water pollution. There is a growing need for the development of novel, efficient, eco-friendly, and cost-effective approach for the remediation of inorganic metals released into the environment and to safeguard the ecosystem. In this regard, recent advances in microbes-base heavy metal have propelled bioremediation as a prospective alternative to conventional techniques.

A cost-effectiveness analysis of social transfers on human capital accumulation

2021 ◽  
Vol 52 (207) ◽  
Author(s):  
Andrés Mideros
Keyword(s):  
Human Capital ◽  
Cost Effectiveness ◽  
Capital Accumulation ◽  
Cost Effective ◽  
Cash Transfers ◽  
Human Capital Accumulation ◽  
Effectiveness Analysis ◽  
Long Term Effect ◽  
Social Transfers

The paper reports on an ex-ante evaluation of the long-term effect of the Ecuadorian social transfer programme called “Bono de Desarrollo Humano (BDH)” on human capital accumulation. A dynamic cohort microsimulation model is used to analyse for cost-effectiveness of different policy scenarios. Results show that cash transfers do promotehuman capital accumulation but with rather small effect. Transfers targeted at critical ages are the most cost-effective to promote human capital accumulation

A Client's Fit for Purpose Solutions in Well Abandonment

2021 ◽  
Author(s):  
Yun Thiam Yap ◽  
Avinash Kishore Kumar
Keyword(s):  
Cost Effective ◽  
Well Design ◽  
Industry Standards ◽  
Cost Effective Approach ◽  
Reservoir Conditions ◽  
Standards And Regulations ◽  
Fit For Purpose ◽  
Well Abandonment ◽  
Oil Company

Abstract Typically, most of the well abandonment practice is reference to the recognized industry standards i.e. NORSOK, UK Oil & Gas and etc, and this is how the wells abandonment was carried out in the past. These practices however evolved/changed over time with lessons learnt and experiences and turn into a fit for purpose solutions for the Client. The shift in international and local standards and regulations for a robust plug and abandonment approach has placed the need for a better and long lasting permanent P&A methodology. Adhering to the existing industry standards in well abandonment is somehow not practical and not cost effective to be implemented in different part of the well, where there are major differences in local regulations, reservoir conditions, caprock thickness, well design philosophy and etc. The magnitude of abandonment cost increase is not at par with the risk reduction in long term hydrocarbon leakage. A fit for purpose solutions is recommended in closing the gap between cost and risk. Due to the extremely varied well architecture between wells, the approach to permanent abandonment varies depending on casing sizes, presence of packers and no of casings present to the caprock area. On top of that, identifying the highest depth for a placement of cement plug will reduce on the amount of plugs to be placed, saving rig time and operational time. So far, 16 idle wells have since been permanently abandoned with the systematic approach of applying caprock restoration concept and reinstating the poor isolation across caprock areas with cement with the assistance of technology to the likes of perf-wash-cement, and hydro mechanical casing cutter. These wells have successfully been abandoned as per host authority standards. This paper will explore a major local oil company’ approach to decommissioning of wells, in line with local regulations enforced, while ensuring a cost effective approach is applied in line with the available technologies.

Farmer Participatory Crop Improvement. I. Varietal Selection and Breeding Methods and Their Impact on Biodiversity

1996 ◽  
Vol 32 (4) ◽  
pp. 445-460 ◽  
Author(s):  
J. R. Witcombe ◽  
A. Joshi ◽  
K. D. Joshi ◽  
B. R. Sthapit
Keyword(s):  
Plant Breeding ◽  
Crop Improvement ◽  
Cost Effective ◽  
Participatory Plant Breeding ◽  
Participatory Varietal Selection ◽  
Farmer Participatory Research ◽  
Long Term Effect ◽  
Impact On Biodiversity ◽  
The Impact

SUMMARYFarmer participatory approaches for the identification or breeding of improved crop cultivars can be usefully categorized into participatory varietal selection (PVS) and participatory plant breeding (PPB). Various PVS and PPB methods are reviewed. PVS is a more rapid and cost-effective way of identifying farmer-preferred cultivars if a suitable choice of cultivars exists. If this is impossible, then the more resource-consuming PPB is required. PPB can use, as parents, cultivars that were identified in successful PVS programmes. Compared with conventional plant breeding, PPB is more likely to produce farmer-acceptable products, particularly for marginal environments. The impact of farmer participatory research on biodiversity is considered. The long-term effect of PVS is to increase biodiversity, but where indigenous variability is high it can also reduce it. PPB has a greater effect on increasing biodiversity although its impact may be limited to smaller areas. PPB can be a dynamic form of in situ genetic conservation.

3414 Cost effective approach to patients on long term anticoagulation who need endoscopy.

2000 ◽  
Vol 51 (4) ◽  
pp. AB86
Author(s):  
Abraham Mathew ◽  
Ann Ouyang ◽  
Thomas R. Riley ◽  
Mark Young
Keyword(s):  
Cost Effective ◽  
Cost Effective Approach

Long-term effects of warren ripping for rabbit control in semi-arid South Australia.

1991 ◽  
Vol 13 (2) ◽  
pp. 96 ◽  
Author(s):  
GJ Mutze
Keyword(s):  
South Australia ◽  
Cost Effective ◽  
Long Term Effects ◽  
Short Term ◽  
Long Term Effect ◽  
Perennial Shrubs ◽  
Control Work ◽  
Semi Arid

Warren ripping and poisoning were used to control rabbits on the flood-out plain of a major creek system on Manunda Station, a sheep-grazing property near Yunta in semi-arid South Australia. Rabbit numbers were initially reduced by >99 per cent, as indicated by the number of active entrances remaining in rabbit warrens. After nearly 10 years without follow-up control work, ripped warrens had only two per cent of the pre-control number of active entrances. Poisoning effectively reduced rabbit numbers in the short-term, but had no long-term effect on the number of active entrances, either in ripped or unripped warrens. Perennial shrubs regenerated on and around ripped warrens. Warren ripping on this part of Manunda is a cost-effective management option.

scholarly journals Electroconductive nanofibrous membranes with nanosheet-based microsphere-threaded heterostructures enable oily wastewater remediation

2021 ◽  
Author(s):  
Jichao Zhang ◽  
Jun Song ◽  
Lifang Liu ◽  
Peng Zhang ◽  
Yang Si ◽  
...  
Keyword(s):  
Water Pollution ◽  
Human Health ◽  
Oily Wastewater ◽  
Wastewater Remediation ◽  
Significant Burden ◽  
Nanofibrous Membranes ◽  
Oil Fouling

Water pollution caused by oil has posed a significant burden on ecosystem and human health. However, the present membranes suffer from serious oil fouling issue during long-term oily wastewater remediation,...

scholarly journals The ongoing battle against COVID-19

2020 ◽  
Vol 2 (4) ◽  
pp. 360-366
Author(s):  
Qurratulain Hyder ◽  
◽  
Khawaja Husnain Haider ◽  
Keyword(s):  
Respiratory Disease ◽  
Health Resources ◽  
Cost Effective ◽  
Face Mask ◽  
Drug Combinations ◽  
World Health ◽  
Recommended Treatment ◽  
Cost Effective Approach ◽  
Term Management

After spillover from Wuhan (China) in December, 2019, SARS-CoV-2 related respiratory disease (COVID-19) has rapidly affected all countries. The pandemic has posed a serious threat to world health resources. At present, there is no recommended treatment or vaccine for SARS-CoV-2. However, various drug combinations are under trial. Reversion to general principles of prevention is the preferred strategy under such circumstances. We discuss the importance of wearing a face mask and present a cost-effective approach for long-term management of COVID-19.

Farmer Participatory Crop Improvement. I. Varietal Selection and Breeding Methods and Their Impact on Biodiversity

1996 ◽  
Vol 32 (4) ◽  
pp. 445-460 ◽  
Author(s):  
J. R. Witcombe ◽  
A. Joshi ◽  
K. D. Joshi ◽  
B. R. Sthapit
Keyword(s):  
Plant Breeding ◽  
Crop Improvement ◽  
Cost Effective ◽  
Participatory Plant Breeding ◽  
Participatory Varietal Selection ◽  
Farmer Participatory Research ◽  
Long Term Effect ◽  
Impact On Biodiversity ◽  
The Impact

SUMMARYFarmer participatory approaches for the identification or breeding of improved crop cultivars can be usefully categorized into participatory varietal selection (PVS) and participatory plant breeding (PPB). Various PVS and PPB methods are reviewed. PVS is a more rapid and cost-effective way of identifying farmer-preferred cultivars if a suitable choice of cultivars exists. If this is impossible, then the more resource-consuming PPB is required. PPB can use, as parents, cultivars that were identified in successful PVS programmes. Compared with conventional plant breeding, PPB is more likely to produce farmer-acceptable products, particularly for marginal environments. The impact of farmer participatory research on biodiversity is considered. The long-term effect of PVS is to increase biodiversity, but where indigenous variability is high it can also reduce it. PPB has a greater effect on increasing biodiversity although its impact may be limited to smaller areas. PPB can be a dynamic form of in situ genetic conservation.

Restored Crossings: When and Where to Apply Stream Restoration Techniques to Protect Exposed Pipelines

2016 ◽  
Author(s):  
Dan Salas ◽  
Aaron Steber
Keyword(s):  
Stream Restoration ◽  
Cost Effective ◽  
Hydraulic Pressure ◽  
Site Conditions ◽  
Cost Effective Approach ◽  
Restoration Techniques ◽  
Habitat Enhancement ◽  
Selection Of ◽  
Pipe Vibration

Maintenance of existing rights-of-way often involve dealing with exposed pipelines near stream crossings. Streams often shift over time. This adjustment can lead to erosion of the streambed and streambanks, exposing pipelines or other infrastructure to threats such as hydraulic pressure, buoyancy, debris collisions, or pipe vibration and fatigue. Under these conditions, managers can be faced with relocating the pipe, performing localized streambank stabilization, or employing stream restoration techniques to provide long-term protection. When localized stabilization is the preferred approach, selection of techniques is often determined by what will protect the pipeline without consideration of the stream context surrounding it. However, due to site conditions, manager preferences, and regulatory considerations, techniques from the disciplines of stream restoration and habitat enhancement can provide cost-effective alternatives to traditional hard-armoring by concrete or stone depending on the site context. Using past experience and a series of decision analysis tools, it was determined that geomorphic context should be factored as a foremost consideration when evaluating the most stable and cost effective approach to correcting exposed pipelines. One of the most critical factors in assessing the feasibility of stabilization options is the height and orientation of exposed pipes relative to the stream’s bankfull elevation.

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