Removing As, Ba, Cu and Zn from Waste Plasma Display Panel Glass by Electrokinetics

Due to shorter and shorter life span and the rapid development of flat panel display, plasma display panel (PDP) is now becoming a new kind of e-waste. In order to remove heavy metals, such as As, Ba, Cu, Zn, from waste PDP glass, electro-kinetic process was introduced and factors that affect heavy metal removing rate were investigated. Results showed that HNO3 concentration and PDP adding amount could significantly impact heavy metal removing rate, while current density was on the opposite. Heavy metal removing rate increased first and then decreased as the time extension. When PDP powders was 2 g, 9 mL 5 mol/L HNO3 was added, current density was 200 mA/cm2 and time was 6 h, the removal rate of As, Ba, Cu, Zn were 71.02%, 95.87%, 92.50% and 97.70%, respectively. As, Ba, Cu and Zn distributions in the cathode, anode and middle chamber varied as changing particle size, HNO3 concentration, current density. Generally, most Cu was concentrated in cathode chamber, and Zn in the anode chamber, while As and Ba would be in both cathode and anode chamber. As, Ba, Cu and Zn, in the middle chamber, no more than 10%, were the lowest among the three.

Download Full-text

Market adjacency and competing technologies: evidence from the flat panel display industry

Industrial and Corporate Change ◽

10.1093/icc/dtz009 ◽

2019 ◽

Vol 28 (6) ◽

pp. 1429-1447

Author(s):

Derek Lehmberg ◽

Charles Dhanaraj ◽

Rod White

Keyword(s):

Liquid Crystal ◽

Liquid Crystal Display ◽

Cost Advantage ◽

Flat Panel Display ◽

Plasma Display Panel ◽

Flat Panel ◽

End Products ◽

Plasma Display ◽

The Cost ◽

Competing Technologies

Abstract What determines the emergence of a winner between competing technologies? We examine competition between flat panel display technologies, with the purpose of understanding of how liquid crystal display was able to surpass plasma display panel technology despite the initial lack of a convincing technological or cost advantage, and in the absence of network externalities. We propose an explanation whereby the relative availability of pathways of suitable adjacent applications markets provides differential opportunities for technologies to increase their scope and scale of application incrementally, effecting the speed of development as well as the cost effectiveness of the end products. Our findings suggest that these sets of adjacent application markets available can strongly influence which technologies emerge as winners and which are eventually abandoned.

Download Full-text

Heavy metal removal from MSS fly ash by thermal and chlorination treatments

Scientific Reports ◽

10.1038/srep17270 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 12

Author(s):

Jingyong Liu ◽

Jiacong Chen ◽

Limao Huang

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Fly Ash ◽

Evaporation Rate ◽

Metal Removal ◽

Removal Rate ◽

Heavy Metal Removal ◽

Efficient Removal ◽

Waste Sludge ◽

Cu And Zn

Abstract The thermal behavior of heavy metals in the co-incineration of municipal solid waste-sludge incinerator fly ash (MSS fly ash) was studied using a laboratory-scale tube furnace. The results indicate that without the addition of chlorinating agents, temperature was an important parameter and had significantly influenced on heavy metal removal, whereas the residence time had a weak effect. Between 900 and 1000 °C for 60 to 300 min, heavy metals reacted with chloride-inherent in the fly ash and approximately 80 to 89% of Pb, 48% to 56% of Cd, 27% to 36% of Zn and 6% to 24% of Cu were removed. After the adding chlorinating agents, the evaporation rate of the heavy metals improved dramatically, where the evaporation rates of Cu and Zn were larger than that of Pb and Cd. As the amount of added chlorinating agents increased, the removal rate of heavy metals increased. However, the effect of the type of chlorinating agent on the chlorination of heavy metals differed considerably, where NaCl had the weakest effect on the removal rate of Cu, Cd and Zn. In terms of resource recovery and decontamination, MgCl2 and CaCl2 are the best choices due to their efficient removal of Zn.

Download Full-text

Optimization of the Plasma Display Panel Characteristics with PIC-MCC Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.227.148 ◽

2011 ◽

Vol 227 ◽

pp. 148-151

Author(s):

Wafà Benstâli ◽

Ahmed Belasri

Keyword(s):

Monte Carlo ◽

Current Density ◽

Spatiotemporal Variation ◽

Gas Pressure ◽

Plasma Display Panel ◽

Particle In Cell ◽

Cell Discharge ◽

Plasma Display ◽

Energy Dissipated ◽

Optimized Conditions

In this paper, we present Plasma Display Panel (PDP) cell discharge using a 1D Particle in Cell with Monte Carlo Collisions model. The effect of gas pressure on the PDP characteristics including current density, voltage margins and energy balance is then studied in order to show the optimized conditions to obtain more energy dissipated in xenon excitation. The results show, at first, the spatiotemporal variation of the electric field and charges densities. It is also seen that for more important gas pressure, there is an increase of the current density, voltage margins and the energy deposited into xenon excitation and ionization.

Download Full-text

HEAVY METALS IN WATER, SEDIMENTS AND MARINE FISHES FROM BULGARIAN BLACK SEA

Proceedings of International Conference "Managinag risks to coastal regions and communities in a changinag world" (EMECS'11 - SeaCoasts XXVI) ◽

10.31519/conferencearticle_5b1b93d4d78bb6.88545986 ◽

2017 ◽

Author(s):

Katya Peycheva ◽

Mona Stancheva ◽

Stanislava Georgieva ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Black Sea ◽

Fish Species ◽

Distribution Patterns ◽

Marine Fishes ◽

Marine Water ◽

Mean Values ◽

Sprattus Sprattus ◽

Cu And Zn

In this study, the ecosystem marine water-sediment-biota was investigated and the pollution was assessed. The concentrations of eight elements were determined in marine water, sediments and four fish species collected from Black Sea (Varna), Bulgaria during 2013. Marine water recorded the highest concentrations of Zn (15-22 μg/L), As (1.1–1.2 μg/L) and Pb (0.7-0.8 μg/L) while Zn (31-52 μg/g), Pb (21-29 μg/g) and Cu (20-34 μg/g) and show the highest concentrations in sediments. Water and sediments showed similar spatial distribution patterns for the highest mean values of the different metals. In the analysed fish species, the highest concentration of the metals Cu and Zn were found in Trachurus Mediterrneus (0.42 mg/kg w.w) and in Sprattus Sprattus (12.7 mg/kg w.w), respectively while the heavy metals As and Hg were found with maximum values in Pseta Maxima (3.99 mg/kg w.w and 0.08 mg/kg w.w respectively). The results from this study were compared with our data for a previous period (2004-2006) and they show decrease in the levels of heavy metal.

Download Full-text

DETERMINING LIGHTING RELIABILITY OF PLASMA DISPLAY PANEL

Vestnik of Ryazan State Radio Engineering University ◽

10.21667/1995-4565-2017-61-3-124-130 ◽

2017 ◽

Vol 61 ◽

pp. 124-130

Author(s):

A. N. Shesterkin ◽

Keyword(s):

Plasma Display Panel ◽

Plasma Display

Download Full-text

Preparation and Characterization of High-Efficiency Magnetic Heavy Metal Capture Flocculants

Water ◽

10.3390/w13131732 ◽

2021 ◽

Vol 13 (13) ◽

pp. 1732

Author(s):

Yuanyuan Yu ◽

Yongjun Sun ◽

Jun Zhou ◽

Aowen Chen ◽

Kinjal J. Shah

Keyword(s):

Heavy Metal ◽

Reaction Time ◽

High Efficiency ◽

Removal Rate ◽

Low Cost ◽

Monomer Concentration ◽

Synthesis Process ◽

Response Surface Optimization ◽

Metal Capture ◽

Total Monomer Concentration

In this study, a high-efficiency magnetic heavy metal flocculant MF@AA was prepared based on carboxymethyl chitosan and magnetic Fe3O4. It was characterized by SEM, FTIR, XPS, XRD and VSM, and the Cu(II) removal rate was used as the evaluation basis for the preparation process. The effects of AMPS content, total monomer concentration, photoinitiator concentration and reaction time on the performance of MF@AA flocculation to remove Cu(II) were studied. The characterization results show that MF@AA has been successfully prepared and exhibits good magnetic induction characteristics. The synthesis results show that under the conditions of 10% AMPS content, 35% total monomer concentration, 0.04% photoinitiator concentration, and 1.5 h reaction time, the best yield of MF@AA is 77.69%. The best removal rate is 87.65%. In addition, the response surface optimization of the synthesis process of MF@AA was performed. The optimal synthesis ratio was finally determined as iron content 6.5%, CMFS: 29.5%, AM: 53.9%, AMPS: 10.1%. High-efficiency magnetic heavy metal flocculant MF@AA shows excellent flocculation performance in removing Cu(II). This research provides guidance and ideas for the development of efficient and low-cost flocculation technology to remove Cu(II) in wastewater.

Download Full-text