Reclamation of Military Areas Polluted with Traces of Ammunition and Heavy Metals — Using a new Technology and Subhydric Sediments

1995 ◽  
pp. 1207-1208
Author(s):  
D. Freese ◽  
F. Riesbeck
Keyword(s):  
Heavy Metals ◽  
New Technology

scholarly journals Biosorption of Cu(II) Metal ions in Fixed Column by using Coconut Husk Waste

2018 ◽  
Vol 34 (4) ◽  
pp. 2192-2196 ◽  
Author(s):  
Harmiwati N.H ◽  
Khairul Akli ◽  
Rita Youfa ◽  
Maria Isfus Senjawati ◽  
Miftahul Khairati
Keyword(s):  
Heavy Metals ◽  
Continuous Flow ◽  
New Technology ◽  
Liquid Waste ◽  
Optimum Flow Rate ◽  
Coconut Husk ◽  
Bed Height ◽  
Optimum Flow ◽  
Heavy Metal Waste ◽  
Continuous Flow Method

A new technology has been currently developed for the removal of heavy metal waste in water, called biosorption. Biosorption technology has been widely used to remove heavy metals from liquid waste. The potential biomass which can be used as bio sorbent was activated coconut husk waste. By using the continuous flow method and activated coconut husk as bio sorbent, the obtained optimum flow rate and bed height of bio sorbent were 2 mL/min and 0.1 g with adsorption capacity of 188.322 mg/g.

HIGH-pH Coagulation-Adsorption: A New Technology for Water Treatment and Reuse

1989 ◽  
Vol 21 (6-7) ◽  
pp. 511-517 ◽  
Author(s):  
A. M. Dziubek ◽  
A. L. Kowal
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Water Treatment ◽  
Treatment Process ◽  
New Technology ◽  
Treatment Technology ◽  
High Ph ◽  
Optimum Ph ◽  
Turbidity Level ◽  
Partial Inactivation

A novel high-pH water treatment technology with processed dolomite as coagulant is proposed. The technology has been developed on the basis of laboratory-scale experiments with model solutions and a variety of natural water samples. Treatment effects are assessed in terms of colour, turbidity, TOC and COD removal. The technology is successful when applied to the treatment of surface water, irrespective of the influent concentration of pollutants. The effluent is clear and colourless, displaying a high removal of organic matter and heavy metals, as well as a partial inactivation of viruses and bacteria. Following a single-stage recarbonation process, water treated via this technology exerts no corrosive action. The optimum dolomite coagulant dose depends exclusively on the influent alkalinity, provided that turbidity level and colour concentration are moderately high. The optimum pH for the treatment process approaches 10.5. The technology proposed is an advantageous combination of three unit processes: decarbonation, coagulation and adsorption.

A literature based study of stormwater harvesting as a new water resource

2009 ◽  
Vol 60 (5) ◽  
pp. 1327-1339 ◽  
Author(s):  
Sami M. Hamdan
Keyword(s):  
Heavy Metals ◽  
Water Resources ◽  
Water Resource ◽  
Rainwater Harvesting ◽  
New Technology ◽  
Quality Parameters ◽  
Point Of View ◽  
Positive Contribution ◽  
Co Precipitation ◽  
Water Scarce

Rainwater harvesting is an important new water resource that participates in bridging the deficit in the water resources in water scarce countries. It is not a new technology but it has been practiced in many countries for many years. From a quantitative point of view it makes a positive contribution to the water resources balance. However, the quality of this new water resource was under the subject of this study in addition to the historical and international experiences carried out in stormwater management. Rainwater harvested from rooftops was noted to be much cleaner than that coming from urban stormwater runoff. The water quality parameters in stormwater were examined with a focus on heavy metals such as Cd, Zn, Pb and Cu which are released in low pH values. Fortunately, heavy metals like other ionic bounds and metal oxide bounds are removed by precipitation or co-precipitation at high values of pH.

scholarly journals Photocatalysis for Heavy Metal Treatment: A Review

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1729
Author(s):  
Xinyu Gao ◽  
Xiangchao Meng
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Environmental Remediation ◽  
New Technology ◽  
Comprehensive Review ◽  
Metal Treatment ◽  
Oxidation Technology ◽  
Low Efficiency ◽  
Future Work ◽  
By Products

Environmental and human health are threatened by anthropogenic heavy metal discharge into watersheds. Traditional processes have many limitations, such as low efficiency, high cost, and by-products. Photocatalysis, an emerging advanced catalytic oxidation technology, uses light energy as the only source of energy. It is a clean new technology that can be widely used in the treatment of organic pollutants in water. Given the excellent adaptability of photocatalysis in environmental remediation, it can be used for the treatment of heavy metals. In this comprehensive review, the existing reported works in relevant areas are summarized and discussed. Moreover, recommendations for future work are provided.

Experimental Study on New Technology for Solidifying/Stabilizing Papermaking Sludge

2010 ◽  
Vol 156-157 ◽  
pp. 84-89
Author(s):  
Xu Nan Ning ◽  
Shi Wen Li ◽  
Jing Yong Liu ◽  
Zuo Yi Yang ◽  
Zhu Ying
Keyword(s):  
Mechanical Properties ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Compressive Strength ◽  
New Technology ◽  
Oxygen Demand ◽  
Heavy Metal Concentration ◽  
National Standards ◽  
Curing Time ◽  
Water Ratio

For better harmlessly treatment of papermaking sludge, a new technology for solidifying and stabling of sludge was studied. Papermaking sludge was solidified and stabilized by the solidifying agents including cement, powder fly ash (PFA) and cinder. The mechanical properties of solidified sludge block were evaluated by compressive strength, chemical oxygen demand (COD) and heavy metals concentration in the leachate from the solidified block were tested as well. When the solidifying agents has the following composition (cement 0.12kg/kg, PFA 0.02kg/kg and cinder 0.10kg/kg respectively), and the curing time was 6ds, the compressive strength of the solidified sludge blocks reached 360kPa. The results showed that cement and cinder were all positive in the compressed strength of sludge block. If they were mixed with PFA together, they could enhanced the solidification of organic and heavy metals in the sludge. Under this conditions, the COD in leachate from the solidified block was 115.7 mg/L, and the heavy metal concentration had reached the related national standards, after 6ds of curing time, water ratio of the solidified block kept from 35% to 40%, which met the prescribed standards of landfill.

Characterization and Optimization of Heavy Metals Biosorption by Fish Scales

2013 ◽  
Vol 795 ◽  
pp. 260-265 ◽  
Author(s):  
Nabilah Zayadi ◽  
Norzila Othman
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Contact Time ◽  
Biological Treatment ◽  
New Technology ◽  
Synthetic Wastewater ◽  
Fish Scale ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Maximum Removal

The pollution of water with heavy metals has been a great concern due to their toxic nature and adverse effect. Various techniques were employed to remove heavy metal namely physical, chemical, and biological treatment. Biosorption is one of the biological treatment that has emerged as a new technology for the removal and recovery of metal ions from aqueous solutions which is more environmental friendly. Biosorption using Tilapia fish scale was studied with the intention to remove zinc, plumbum, and ferum ions from synthetic wastewater. The optimum adsorption capacities of fish scale was investigated under several condition namely, pH, biosorbent dosage, initial heavy metals concentration, and contact time while final concentration was obtained by using Inductively Coupled Plasma-Mass (ICP-MS). The results revealed that 92.3% of zinc, 89.33% of plumbum, and 64.2% of ferum able to be sequestered under best adsorption conditions. The maximum percentage removals were observed at pH 6, 5.5, 4.5 and dosage 0.02 g, 0.001 g, 0.8 g at concentration 10 ppb, 0.3 ppb, 300 ppb for zinc, plumbum, and ferum ions, respectively. Maximum removal achieved at 3 hours contact time for ferum and zinc while 2 hours for plumbum. The results indicate that Tilapia fish scale is a promising method in removing ferum, zinc, and plumbum ions from aqueous solution.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

Characterization of RF Sputtered ZnO Piezoelectric Films Using Transmission Electron Microscope

1975 ◽  
Vol 33 ◽  
pp. 86-87
Author(s):  
Kemining W. Yeh ◽  
Richard S. Muller ◽  
Wei-Kuo Wu ◽  
Jack Washburn
Keyword(s):  
Integrated Circuit ◽  
Acoustic Waves ◽  
New Technology ◽  
Surface Acoustic Waves ◽  
Electromechanical Properties ◽  
Leading Role ◽  
Saw Devices ◽  
Transmission Electron ◽  
High Degree

Considerable and continuing interest has been shown in the thin film transducer fabrication for surface acoustic waves (SAW) in the past few years. Due to the high degree of miniaturization, compatibility with silicon integrated circuit technology, simplicity and ease of design, this new technology has played an important role in the design of new devices for communications and signal processing. Among the commonly used piezoelectric thin films, ZnO generally yields superior electromechanical properties and is expected to play a leading role in the development of SAW devices.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

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