scholarly journals Biomass Accumulation and Water Purification of Water Spinach Planted on Water Surface by Floating Beds for Treating Biogas Slurry

2013 ◽  
Vol 04 (11) ◽  
pp. 1230-1235 ◽  
Author(s):  
Xiaomei Yu ◽  
Zhaohua Li ◽  
Sha Zhao ◽  
Kun Li
Keyword(s):  
Water Purification ◽  
Water Surface ◽  
Biomass Accumulation ◽  
Biogas Slurry ◽  
Water Spinach ◽  
Purification Of Water

scholarly journals Superhydrophobic Sands for the Preservation and Purification of Water

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 151
Author(s):  
Yuyang Liu ◽  
Chang-Hwan Choi
Keyword(s):  
Water Surface ◽  
Particulate Material ◽  
Self Assembled Monolayer ◽  
Hydrophobic Coatings ◽  
Hydrophobic Coating ◽  
Evaporation Loss ◽  
Zno Nanocrystals ◽  
Sand Particles ◽  
Purification Of Water ◽  
Nanoscale Roughness

Sand, a cheap and naturally abundant particulate material, was modified with photocatalytic and hydrophobic coatings to reduce evaporation loss and facilitate the purification of water. The first-level photocatalytic coatings (TiO2 or ZnO nanocrystals) rendered nanoscale roughness on the surface of the sand. The additional second-level hydrophobic coating of a self-assembled monolayer of octyltrimethoxysilane (OTS) made the sand particles superhydrophobic because of the nanoscale roughness imposed by the nanocrystals. The superhydrophobic sand particles, floating on the free surface of water due to their superhydrophobicity, significantly reduced the evaporation loss of water by 60%–90% in comparison to an uncovered water surface. When the outer hydrophobic coatings are weathered or disengaged, the inner photocatalytic coatings become exposed to water. Then, the sand particles act as photocatalysts to degrade the contaminants in water under solar radiation.

scholarly journals Recent Progress in the Membrane Distillation and Impact of Track-Etched Membranes

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2520
Author(s):  
Arman B. Yeszhanov ◽  
Ilya V. Korolkov ◽  
Saule S. Dosmagambetova ◽  
Maxim V. Zdorovets ◽  
Olgun Güven
Keyword(s):  
Water Purification ◽  
Vinylidene Fluoride ◽  
Liquid Radioactive Waste ◽  
Theoretical Models ◽  
Membrane Distillation ◽  
Narrow Pore Size Distribution ◽  
Poly Ethylene Terephthalate ◽  
Poly Vinylidene Fluoride ◽  
Poly Ethylene ◽  
Purification Of Water

Membrane distillation (MD) is a rapidly developing field of research and finds applications in desalination of water, purification from nonvolatile substances, and concentration of various solutions. This review presents data from recent studies on the MD process, MD configuration, the type of membranes and membrane hydrophobization. Particular importance has been placed on the methods of hydrophobization and the use of track-etched membranes (TeMs) in the MD process. Hydrophobic TeMs based on poly(ethylene terephthalate) (PET), poly(vinylidene fluoride) (PVDF) and polycarbonate (PC) have been applied in the purification of water from salts and pesticides, as well as in the concentration of low-level liquid radioactive waste (LLLRW). Such membranes are characterized by a narrow pore size distribution, precise values of the number of pores per unit area and narrow thickness. These properties of membranes allow them to be used for more accurate water purification and as model membranes used to test theoretical models (for instance LEP prediction).

scholarly journals METAL-ORGANIC FRAMEWORKS APPLIED FOR WATER PURIFICATION

2018 ◽  
pp. 1-16
Author(s):  
Open Journal Systems TPU Administrator
Keyword(s):  
Porous Materials ◽  
Water Purification ◽  
Metal Organic Frameworks ◽  
Water Stability ◽  
Inorganic Contaminants ◽  
Ligand Modification ◽  
Metal Organic ◽  
Promising Application ◽  
Adsorbent Materials ◽  
Purification Of Water

Metal-organic frameworks (MOFs) which are materials constructed from metal ions/clusters bridged with organic linkers have emerged as an important family of porous materials for widely varying applications. The purification of water polluted with both of organic and inorganic contaminants is a potentially promising application of MOFs since the chemical and thermal properties of the porous materials are easily tunable, e.g. ligand modification, different metal, etc. The demonstration of alignment and the obtained insights facilitate the direction of designing ideal MOF materials with improved water stability for application in water purification. This review gives a brief overview and will be beneficial to the design, functionalization, and promotion of the development of MOFs as adsorbent materials for applications in water purification.

scholarly journals Research of Oil Product Sorption Processes by Ferromagnetic Sorbents

2015 ◽  
Vol 1 ◽  
pp. 153
Author(s):  
Viktors Mironovs ◽  
Juris Treijs ◽  
Edmunds Teirumnieks
Keyword(s):  
Oil Spill ◽  
Water Purification ◽  
Water Surface ◽  
Oil Products ◽  
Promising Direction ◽  
Oil Sorption ◽  
Electromagnetic Devices ◽  
Composite Sorbents ◽  
Light Oil ◽  
Ferromagnetic Particles

In paper, is given overview of sorbents with ferromagnetic particles. The series of newly designed composite sorbents SOMSOR, are described. Described experiment of oil spill collection from water surface, which comprises of sorbent spreading and collection. Oil sorption by capillary forces, is discussed. Concluded that use of ferromagnetic sorbents a promising direction in the field of water purification from light oil products since it allows expanding the scope of the used powder sorbents, to use the high-mechanized methods of collecting by means of magnetic and electromagnetic devices.

The Effect of Water Purification Ecological Engineering on the Cao Yang Round Creek

1991 ◽  
Vol 23 (1-3) ◽  
pp. 121-131 ◽  
Author(s):  
Wang Chongxiao ◽  
Cai Jie ◽  
Zhou Jiaxin ◽  
Xu Sailan ◽  
Yu Yiping ◽  
...  
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Water Purification ◽  
Water Body ◽  
Vascular Plants ◽  
Water Surface ◽  
Suspended Solids ◽  
Ecological Engineering ◽  
Total Suspended Solids

It nas been proved that planting various aquatic vascular plants with proper arrangements of time and space in tne eutropnic water of tne Cao Yang Round Creek nas formed an effective and stable ecological system for purifying water. Within two years, the water quality of the Round Creek has been improved significantly. The density of algae (content of chlorophyll a) has dropped by 95%, the total suspended solids is decreased by more tnan 90%, and COD is also reduced by 50%. The transparency of the water has increased from 15cm Before treatment to 53cm after treatment. Some parts of tne Creek are clear enough to see the bottom, to count tne fish. At the same time, beautification and planting of plants on the water surface has been carried our, together with the purification of the water. In this way, tne sightseeing value of water body is also increased. The paper intends to probe an efficient way of harnessing the eutropnic water By practicing witn purification, Deautification and plant planting all at one time.

OPTIMIZATION OF REMEDIATION OF WATER AND AIR MEDIUM CONTAMINATED WITH POLYCHLOROBIPHENYL

2021 ◽  
pp. 105-109
Author(s):  
MAMMADLI RASHAD SHOHRAT OGLI MAMMADLI RASHAD SHOHRAT OGLI ◽  
Keyword(s):  
Ultraviolet Radiation ◽  
Environmental Pollution ◽  
Tio2 Nanoparticles ◽  
Waste Disposal ◽  
Water Purification ◽  
Polychlorinated Biphenyl ◽  
Air Purification ◽  
Atmospheric Air ◽  
Air Medium ◽  
Purification Of Water

The article is devoted to measures for the purification of water and air medium from polychlorinated biphenyl wastes by the method of UV radiation and NiO2 nanoparticles, on PCBs (polychlorinated biphenyl) constituting groundwater in PCB waste disposal areas, the possibility of neutralizing PCBs in the atmosphere in industrialized areas. A method for the degradation of polychlorinated biphenyl contained in waste and industrial waters, as well as in atmospheric air, has been proposed. Air purification is carried out with ultraviolet and microwave radiation, and ultraviolet radiation and TiO2 nanoparticles are used for water purification. Based on the analysis performed,the problem of optimizing the purification of groundwater and atmospheric air contaminated with polychlorinated biphenyls has been formulated and solved. An expression is proposed for the dependence of the cleaning time on the distance to the place of initial environmental pollution.

scholarly journals Simulation of the process of water purification in multilayered micro porous media

2019 ◽  
pp. 61-63
Author(s):  
Olena Prysiazhniuk ◽  
Andrii Safonyk ◽  
Anna Terebus
Keyword(s):  
Mathematical Model ◽  
Porous Media ◽  
Boundary Value Problem ◽  
Water Purification ◽  
Asymptotic Approximation ◽  
Boundary Value ◽  
Singularly Perturbed ◽  
The Mathematical Model ◽  
Purification Of Water

The mathematical model of the process of adsorption purification of water from impurities in multilayer microporous filters is formulated. An algorithm for numerically-asymptotic approximation of solution of the corresponding nonlinear singularly perturbed boundary value problem is developed. The developed model allows to investigate the distribution of concentration of pollutant inside the filer.

Characteristics of Nutrients Removal from Stored Algae Anaerobic Biogas Slurry in Artificial Aquatic Vegetable Wetlands

2012 ◽  
Vol 178-181 ◽  
pp. 777-782 ◽  
Author(s):  
Guang Can Zhu ◽  
Jin Wei Zhao ◽  
Xuan Xuan Zhao ◽  
Xi Wu Lu
Keyword(s):  
Flow Direction ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Biogas Slurry ◽  
Water Spinach ◽  
Nitrogen And Phosphorus ◽  
Artificial Wetlands ◽  
Urban Sewage ◽  
Uptake Rates

We constructed artificial aquatic water spinach wetland and studied its characteristics on removing nutrients from stored algae anaerobic biogas slurry. The results showed that, when the hydraulic loading was less than 0.10m3/(m2•d), the removal efficiencies of TN and TP were more than 95%, and the effluent quality met class A standard of Urban sewage treatment plant emission standards(GB18918-2002). The uptake rates of water spinach on TN and TP were 1.31 mg/(g•d) and 0.23mg/(g•d). The uptake by water spinach was the main pathway for artificial wetlands to remove nitrogen and phosphorus. The TN and TP removed by plant uptake accounted for 60% and 98% of the total removal, respectively. The nitrification potential of artificial aquatic vegetable wetland decreased gradually along the flow direction with increasing declination extent, while the denitrification potential first increased and then decreased.

scholarly journals Tailor-made synthesis of an melamine-based aminal hydrophobic polymer for selective adsorption of toxic organic pollutants: an initiative towards wastewater purification

RSC Advances ◽  
2019 ◽  
Vol 9 (13) ◽  
pp. 7469-7478 ◽  
Author(s):  
Debanjan Dey ◽  
Naresh Chandra Murmu ◽  
Priyabrata Banerjee
Keyword(s):  
Waste Water ◽  
Organic Pollutants ◽  
Water Purification ◽  
Water Surface ◽  
Selective Adsorption ◽  
Design And Development ◽  
Wastewater Purification ◽  
Hydrophobic Polymer

Design and development of melamine based polyaminal covalent polymer (CPCMERI-2) for selective adsorption of organic pollutants over water surface: an initiative towards waste water purification.

Nano-Solutions or Macro-Failures? An Application of the Public Values Failure Model to the Purification of Water With Nanotechnologies

2011 ◽  
Author(s):  
Beth-Anne Schuelke-Leech
Keyword(s):  
Water Purification ◽  
Technical Solution ◽  
Failure Model ◽  
Public Values ◽  
The Public ◽  
New Challenges ◽  
Societal Problems ◽  
Purification Of Water

New scientific discoveries and technologies can provide substantial benefits for addressing societal problems. They can also pose new challenges and risks. This paper presents the Public Values Failure Model (PVFM) which can assist engineers, managers, and policymakers in considering the broader implications of their work and technology’s impact on society. This model assists in identifying the public values associated with a problem and evaluating the potential public values failures associated with a proposed technical solution. The PVFM is demonstrated using the case of the application of nanotechnologies to water purification.

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