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181.
Tanveer Saee Abdullah Al-Muyee Rumana Afrin Habibur Rahman Guangzhi Sun 《环境科学学报(英文版)》2014,26(4):726-736
This article reports pollutant removal performances of baffled subsurface flow, and integrated surface flow-floating treatment wetland units, when arranged in series for the treatment of municipal wastewater in Bangladesh. The wetland units (of the hybrid system) included organic, inorganic media, and were planted with nineteen types of macrophytes. The wetland train was operated under hydraulic loading fluctuation and seasonal variation. The performance analyses (across the wetland units) illustrated simultaneous denitrification and organics removal rates in the first stage vertical flow wetland, due to organic carbon leaching from the employed organic media. Higher mean organics removal rates (656.0 g COD](m2.day)) did not completely inhibit nitrification in the first stage vertical flow system; such pattern could be linked to effective utilization of the trapped oxygen, as the flow was directed throughout the media by the baffle walls. Second stage horizontal flow wetland showed enhanced biodegradable organics removal, which depleted organic carbon availability for denitrification. The final stage integrated wetland system allowed further nitrogen removal from wastewater, via nutrient uptake by plant roots (along with nitrification), and generation of organic carbon (by the dead macrophytes) to support denitrification. The system achieved higher E. coli mortality through protozoa predation, E. coli oxidation, and destruction by UV radiation. In general, enhanced pollutant removal efflciencies as demonstrated by the structurally modified hybrid wetland system signify the necessity of such modification, when operated under adverse conditions such as: substantial input organics loading, hydraulic loading fluctuation, and seasonal variation. 相似文献
182.
Sludge granulation and e ciency of phase separator in UASB reactor treating
combined industrial e uent 总被引:1,自引:0,他引:1
Abdullah Yasar Nasir Ahm Muhammad Nawaz Chaudhry Aamir Amanat Ali Khan 《环境科学学报(英文版)》2007,19(5):553-558
Sludge granulation and the effect of gas-liquid-solid separator (GLSS) design on the efficiency of upflow anaerobic sludge blanket (UASB) and upflow anaerobic sludge filter (UASF) reactors, operating at HRTs ranging from 3 to 12 h was investigated. VSS/TS ratio gradually increased in both the reactors with increasing sludge age (from 0.5 to more than 0.7 for UASB reactor and 0.012 to 0.043 for UASF reactor). X-Ray diffraction analysis of the UASF sludge showed the presence of expanding clays revealing its additional absorption capability. Fuoraphyllite and albite precipitation related to excellular polymers of the microbial shell structure, showed the extended growth of microorganisms during sludge granulation. A gradual decrease (82%-69%) in COD removal with decreasing HRT was apparent in UASF reactor. In case of UASB reactor, this decrease was marginal because addition of GLSS device significantly improved (14%-20%) the overall efficiency of the UASB reactor. GLSS enhanced the efficiency of the UASB reactor by increasing the settleability of suspended particles and accelerating the coagulation of colloidal particles due to the velocity gradient. 相似文献
183.
184.
Stojanovic Nadica Glisovic Jasna Abdullah Oday I. Belhocine Ali Grujic Ivan 《Environmental science and pollution research international》2022,29(7):9606-9625
Environmental Science and Pollution Research - For achieving the desired vehicle speed, the IC engine is very important, while for further vehicle speed maintaining and adaptation to road... 相似文献
185.
Anarghya Dinesh Sharon Olivera Krishna Venkatesh Mysore Sridhar Santosh Murugesan Geetha Priya Inamuddin Abdullah M. Asiri Handanahally Basavarajaiah Muralidhara 《Environmental Chemistry Letters》2018,16(3):683-694
The development of cost-effective and eco-friendly alternatives of energy storage systems is needed to solve the actual energy crisis. Although technologies such as flywheels, supercapacitors, pumped hydropower and compressed air are efficient, they have shortcomings because they require long planning horizons to be cost-effective. Renewable energy storage systems such as redox flow batteries are actually of high interest for grid-level energy storage, in particular iron-based flow batteries. Here we review all-iron redox flow battery alternatives for storing renewable energies. The role of components such as electrolyte, electrode and membranes in the overall functioning of all-iron redox flow batteries is discussed. The effect of iron–ligand chemistry on the performance of battery is highlighted. Additionally, a brief contextual background and fundamentals of redox flow batteries are provided. The design aspects, progress in research, mathematical modeling, cost estimations and future prospects of using all-iron energy systems are discussed in the context of future grid-level energy storage. 相似文献
186.
Muhammad Wasim Shahrukh Shoaib N. M. Mubarak Inamuddin Abdullah M. Asiri 《Environmental Chemistry Letters》2018,16(3):861-879
Deterioration of buried metal pipes due to corrosive soil environment is a major issue worlwide. Although failures of buried pipe due to corrosive soil is an old problem, yet such failures are still uncontrollable even with the application of advanced corrosion protection technologies. Therefore, understanding factors causing corrosion of buried pipes is necessary. This article reviews factors causing corrosion of buried pipes in soils. Factors include moisture content, soil resistivity, pH, dissolved oxygen, temperature and microbial activity. Moreover, we discuss the influence of manufacturing method and the comparison of corrosion behaviour of cast iron, ductile and mild steel pipes. We found that corrosion rate of pipes increases with moisture contents up to the critical moisture value. Although pH affects corrosion, there is no relationship between corrosion and pH and the corrosion rates of buried pipes are inversely proportional to soil resistivity. Soils containing more organic matter show high resistivity. Dissolved oxygen in soil develops differential cell which accelerates corrosion of metallic pipe. Different types of bacteria present in soil develop biofilms on metallic pipes, which deteriorates pipes with time. 相似文献
187.
Sharon Olivera K. Chaitra Krishna Venkatesh Handanahally Basavarajaiah Muralidhara Inamuddin Abdullah M. Asiri Mohd Imran Ahamed 《Environmental Chemistry Letters》2018,16(4):1233-1246
The presence of contaminants in potable water is a cause of worldwide concern. In particular, the presence of metals such as arsenic, lead, cadmium, mercury, chromium can affect human health. There is thus a need for advanced techniques of water decontamination. Adsorbents based on cerium dioxide (CeO2), also named ‘ceria,’ have been used to remove contaminants such as arsenic, fluoride, lead and cadmium. Ceria and composites display high surface area, controlled porosity and morphology, and abundance of functional groups. They have already found usage in many applications including optical, semiconductor and catalysis. Exploiting their attractive features for water treatment would unravel their potential. We review the potential of ceria and its composites for the removal of toxic metal ions from aqueous medium. The article discusses toxic contaminants in water and their impact on human health; the synthesis and adsorptive behavior of ceria-based materials including the role of morphology and surface area on the adsorption capacity, best fit adsorption isotherms, kinetic models, possible mechanisms, regeneration of adsorbents; and future perspectives of using metal oxides such as ceria. The focus of the report is the generation of cost-effective oxides of rare-earth metal, cerium, in their standalone and composite forms for contaminant removal. 相似文献
188.
Alnawajha Mohammad Mohammad Kurniawan Setyo Budi Imron Muhammad Fauzul Abdullah Siti Rozaimah Sheikh Hasan Hassimi Abu Othman Ahmad Razi 《Environmental science and pollution research international》2022,29(39):58430-58453
Environmental Science and Pollution Research - The increasing intensification of the aquaculture industry requires the development of new strategies to reduce the negative impacts of wastewater on... 相似文献
189.
Entezari Saber Al Mamun Abdullah Mostashari Amir Ganjidoust Hossein Ayati Bita Yang Jun 《Environmental science and pollution research international》2022,29(59):88410-88431
Environmental Science and Pollution Research - Microplastic (MP) pollution is one of the emerging threats to the water and terrestrial environment, forcing a new environmental challenge due to the... 相似文献
190.
Pandiselvam Ravi Kaavya Rathnakumar Khanashyam Anandu Chandra Divya Valarivan Abdullah Sajeeb Khan Aurum Fawzan Sigma Dakshyani Rajendran Kothakota Anjineyulu Ramesh Shunmugiah Veluchamy Mousavi Khaneghah Amin 《Environmental science and pollution research international》2022,29(30):45131-45149
Environmental Science and Pollution Research - The application of pesticides enhances food production vastly, and it cannot be prevented; longer fresh produce is contaminated with... 相似文献