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61.
Influence of supports on photocatalytic degradation of phenol and 4-chlorophenol in aqueous suspensions of titanium dioxide 总被引:1,自引:0,他引:1
The photocatalytic degradation of phenol and 4-chlorophenol (4-CP) in aqueous suspensions with the use of titanium dioxide (TiO2 ) under UV irradiation was examined. The effects of different supporting materials mixed physically with TiO2 were studied to achieve maximum degradation efficiency. Among the three supports, namely activated carbon (AC), silica (SiO2 ) and zeolite (ZSM-5), all exhibited paramount efficiency for degradation of phenol and 4-CP and was better than TiO2 alone. The optimum concentration was found to be 50 mg for all supporting materials. The efficiency order of the three supports was as follows: AC > ZSM-5 > SiO2 , respectively. Whilst, the degradation of phenol and 4-CP was improved from 70.6% to 87.6% and 80.6% to 89.7%, respectively, within 120 min photocatalysis in the presence of optimal amount of AC. The degradation was also comparatively enhanced in the presence of cheaper rice husk and the activity was closed to ZSM-5 and lower than AC. 相似文献
62.
Li Wei Ullah Sana 《Environmental science and pollution research international》2022,29(36):54448-54455
Environmental Science and Pollution Research - The main objective of this study is to investigate the impact of research and development (R&D) intensity on renewable energy consumption in... 相似文献
63.
Changing the Course of Rivers in an Asian City: Linking Landscapes to Human Benefits through Iterative Modeling and Design
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Derek Vollmer Diogo Costa Ervine Shengwei Lin Yazid Ninsalam Kashif Shaad Michaela F. Prescott Senthil Gurusamy Federica Remondi Rita Padawangi Paolo Burlando Christophe Girot Adrienne Grêt‐Regamey Joerg Rekittke 《Journal of the American Water Resources Association》2015,51(3):672-688
Concerns over water scarcity, climate change, and environmental health risks have prompted some Asian cities to invest in river rehabilitation, but deciding on the end goals of rehabilitation is a complex undertaking. We propose a multidisciplinary framework linking riparian landscape change to human well‐being, providing information relevant to decision makers, in a format that facilitates stakeholder involvement. We illustrate this through a case study of the densely settled, environmentally degraded, and flood prone Ciliwung River flowing through metropolitan Jakarta, Indonesia. Our methodology attempts to respond to this complexity through an iterative approach, strongly based on conceptualization and mathematical modeling. Nested hydrologic, hydrodynamic, and water quality models provide outputs at catchment‐, corridor‐, and localized site‐scales. Advanced 3‐D landscape modeling is used for procedural design and precise visualization of proposed changes and their impacts, as predicted by the mathematical models. Finally, participatory planning and design methods allow us to obtain critical stakeholder feedback in shaping a socially acceptable approach. Our framework aims at demonstrating that a change in paradigm in river rehabilitation is possible, and providing future scenarios that balance concerns over flooding, water quality, and ecology, with the realities of a rapidly growing megacity. 相似文献
64.
Zarin Riaz Azmat Muhammad Naqvi Salman Raza Saddique Qaisar Ullah Saif 《Environmental science and pollution research international》2021,28(16):19726-19741
Environmental Science and Pollution Research - Rapid population growth integrated with poor governance and urban planning is highly challenging resulting key for the selection of unsuitable... 相似文献
65.
Zhao Weijun Hafeez Muhammad Maqbool Adnan Ullah Sana Sohail Sidra 《Environmental science and pollution research international》2021,28(37):51199-51209
Environmental Science and Pollution Research - With rapid economic growth, BRICS is facing enormous burdens of carbon emission and severe issues of income inequality. However, behind this economic... 相似文献
66.
Sohail Muhammad Tayyab Ullah Sana Majeed Muhammad Tariq Usman Ahmed 《Environmental science and pollution research international》2021,28(23):29046-29055
Environmental Science and Pollution Research - Modern advances in nonlinear modeling have exposed that nonlinear models yield more robust results compared with linear models. Research on the effect... 相似文献
67.
Sohail Muhammad Tayyab Ullah Sana Majeed Muhammad Tariq Usman Ahmed Andlib Zubaria 《Environmental science and pollution research international》2021,28(23):29265-29275
Environmental Science and Pollution Research - This study explores the symmetric and asymmetric effects of the shadow economy on clean energy and air pollution of South Asian countries over the... 相似文献
68.
Naz Saima Hussain Riaz Ullah Qudrat Chatha Ahmad Manan Mustafa Shaheen Ansar Khan Rifat Ullah 《Environmental science and pollution research international》2021,28(6):6533-6539
Environmental Science and Pollution Research - The current study was conducted to assess the hematological and histopathological changes in major carp (Catla catla) exposed to different... 相似文献
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70.
The aim of this research was to determine appropriate treatment technique for effective treatment of heavily polluted landfill leachate. We accomplished several treatment experiments: (i) aerobic biological treatment, (ii) chemical coagulation, (iii) advanced oxidation process (AOP) and (iv) several combined treatment strategies. Efficiency of these treatment procedures were monitored by analysing COD and colour removal. Leachate used for this study was taken from Matuail landfill site at Dhaka city. With extended aeration process which is currently used in Matuail landfill site for leachate treatment, maximum COD and colour removal of 36% and 20%, respectively could be achieved with optimum retention period of 7days. With optimum aluminium sulphate dose of 15,000mg/L and pH value of 7.0, maximum COD and colour removals of 34% and 66%, respectively were observed by using chemical coagulation. With optimum pH of 5.0 and optimum dosages of reagents having H(2)O(2)/Fe(2+) molar ratio of 1.3 the highest removal of COD and colour were found 68% and 87%, respectively with sludge production of 55%. Fenton treatment which is an advanced oxidation process was the most successful between these three separate treatment procedures. Among the combined treatment options performed, extended aeration followed by Fenton method was the most suitable one. 相似文献