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81.
Tyre recycling has become a necessity because of the huge piles of tyres that represent a threat to the environment. The used
tyres represent a source of energy and valuable chemical products. Waste tyres were pyrolysed catalytically in a batch reactor
under atmospheric pressure. Calcium carbide was used as a catalyst to explore its effect on pyrolysis product distribution.
The effect of temperature, amount of catalyst and time on the yields of the pyrolysed products was investigated. Char yield
decreased with increase of pyrolysis temperature while total gas and liquid yields increased. The liquid fraction was obtained
with boiling point up to 320 °C. The physical and chemical properties of the pyrolysed products obtained were characterized.
The catalytic pyrolysis produced 45 wt.% aromatic, 35 wt.% aliphatic and 20 wt.% of polar hydrocarbons.
The distillation data showed that ∼80% of oil has boiling point below 270 °C which is the boiling point for 50% of distilled
product in commercial diesel oil. The oil fraction was found to have high gross calorific value; GCV (42.8 MJ kg−1). Its Specific gravity, viscosity, Kinematic viscosity, freezing point and diesel index were also within the limits of diesel
fuel.
The char residues were studied to investigate their characteristics for use as a possible adsorbent. Surface area of char
before and after acid demineralization was determined to determine the adsorptive features for waste water treatment. 相似文献
82.
Khan Nasir Abbas Gao Qijie Abid Muhammad Shah Ashfaq Ahmad 《Environmental science and pollution research international》2021,28(4):4229-4244
Environmental Science and Pollution Research - In developing countries like Pakistan, agriculture constitutes the primary source of support for the majority of rural and the adjacent urban... 相似文献
83.
84.
Najm us Saqib Rohana Adnan Irfan Shah 《Environmental science and pollution research international》2016,23(16):15941-15951
Titanium dioxide (TiO2) has been considered a useful material for the treatment of wastewater due to its non-toxic character, chemical stability and excellent electrical and optical properties which contribute in its wide range of applications, particularly in environmental remediation technology. However, the wide band gap of TiO2 photocatalyst (anatase phase, 3.20 eV) limits its photocatalytic activity to the ultraviolet region of light. Besides that, the electron-hole pair recombination has been found to reduce the efficiency of the photocatalyst. To overcome these problems, tailoring of TiO2 surface with rare earth metals to improve its surface, optical and photocatalytic properties has been investigated by many researchers. The surface modifications with rare earth metals proved to enhance the efficiency of TiO2 photocatalyts by way of reducing the band gap by shifting the working wavelength to the visible region and inhibiting the anatase-to-rutile phase transformations. This review paper summarises the attempts on modification of TiO2 using rare earth metals describing their effect on the photocatalytic activities of the modified TiO2 photocatalyst. 相似文献
85.
Fozia Batool Shahid Iqbal Kim Wei Chan Muhammad Ilyas Tariq Afzal Shah Muhammad Mustaqeem 《Environmental Forensics》2015,16(1):1-6
Hair and nail samples from young Pakistani adults were separately analyzed for quantification of Cd, Cr, Cu, Ni, Pb, and Zn concentrations. The concentrations of these metals were also analyzed in commonly consumed local foods to evaluate potential correlation of hair and nail concentrations with diet. Pearson correlation coefficients ranged from 0.349 to 0.999, demonstrating diet to be a significant contributor for accumulation of heavy metals in humans. 相似文献
86.
Impacts of continuously regenerating trap and particle oxidation catalyst on the NO2 and particulate matter emissions emitted from diesel engine 总被引:1,自引:1,他引:0
Zhihua Liu Yunshan Ge Jianwei Tan Chao He Asad Naeem Shah Yan Ding Linxiao Yu Wei Zhao 《环境科学学报(英文版)》2012,24(4):624-631
Two continuously regenerating diesel particulate filter (CRDPF) with different configurations and one particles oxidation catalyst (POC) were employed to perform experiments in a controlled laboratory setting to evaluate their effects on NO2, smoke and particle number emissions. The results showed that the application of the after-treatments increased the emission ratios of NO2/NOx significantly. The results of smoke emissions and particle number (PN) emissions indicated that both CRDPFs had sufficient capacity to remove more than 90% of total particulate matter (PM) and more than 97% of solid particles. However, the POC was able to remove the organic components of total PM, and only partially to remove the carbonaceous particles with size less than 30 nm. The negligible effects of POC on larger particles were observed due to its honeycomb structure leads to an inadequate residence time to oxidize the solid particles or trap them. The particles removal efficiencies of CRDPFs had high degree of correlations with the emission ratio of NO2/NOx. The PN emission results from two CRDPFs indicated that more NO2 generating in diesel oxidation catalyst section could obtain the higher removal efficiency of solid particles. However this also increased the risk of NO2 exposure in atmosphere. 相似文献
87.
Song Junxiu Geng Linling Fahad Shah 《Environmental science and pollution research international》2022,29(35):52984-52994
Environmental Science and Pollution Research - Poverty is a significant global ongoing issue that influences a substantial amount of people despite all efforts to eliminate or lessen it. Although... 相似文献
88.
Mehmood Khalid Mushtaq Sana Bao Yansong Saifullah Bibi Sadia Yaseen Muhammad Khan Muhammad Ajmal Abrar Muhammad Mohsin Ulhassan Zaid Fahad Shah Petropoulos George P. 《Environmental science and pollution research international》2022,29(35):52618-52634
Environmental Science and Pollution Research - As a result of extreme modifications in human activity during the COVID-19 pandemic, the status of air quality has recently been improved. This... 相似文献
89.
Romshoo Shakil Ahmad Murtaza Khalid Omar Shah Waheed Ramzan Tawseef Ameen Ummer Bhat Mustafa Hameed 《Environmental science and pollution research international》2022,29(35):52732-52751
Environmental Science and Pollution Research - The Himalayan glaciers provide water to a large population in south Asia for a variety of purposes and ecosystem services. As a result, regional... 相似文献
90.
Iqbal Aamir Jan M. Rasul Shah Jasmin Rashid Bahroz 《Environmental science and pollution research international》2022,29(59):88763-88778
Environmental Science and Pollution Research - Scarcity in mining and geo-political direction diverts attention toward critical metal recycling. Gallium (Ga), indium (In) and germanium (Ge) are... 相似文献