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71.
This study investigated the ability of fungi isolated from highly contaminated soil to biodegrade polycyclic aromatic hydrocarbon (PAH) compounds, as well as the effect of several parameters on the biodegradation ability of these fungi. The isolated fungi were identified using ITS rDNA sequencing and tested using 2,6‐dichlorophinolendophenol to determine their preliminary ability to degrade crude oil. The top‐performing fungi, Aspergillus flavus and Aspergillus fumigatus, were selected to test their ability to biodegrade PAH compounds as single isolates. After 15 days of incubation, A. flavus degraded 82.7% of the total PAH compounds, with the complete degradation of six compounds, whereas A. fumigatus degraded 68.9% of the total PAHs, with four aromatic compounds completely degraded. We also tested whether different temperatures, pH, and nitrogen sources influenced the growth of A. flavus and the degradation rate. The degradation process was optimal at a temperature of 30°C, pH of 5.5, and with nitrogen in the form of yeast extract. Finally, the ability of the fungal candidate, A. flavus, to degrade PAH compounds under these optimum conditions was studied. The results showed that 95.87% of the total PAHs, including 11 aromatic compounds, were completely degraded after 15 days of incubation. This suggests that A. flavus is a potential microorganism for the degradation of PAH compounds in aqueous cultures. 相似文献
72.
Assadullah Insaaf Zaman M Burhanuz Malik Khurshaid Ahmad Malik Javied Hamid Bhat Aadil Ahmad Tomar Radha 《Environmental science and pollution research international》2021,28(4):3953-3959
Environmental Science and Pollution Research - Chalcogenide nanostructures are the materials with diverse applications. Here, we report rapid hydrothermal synthesis of crystalline ZnSe quantum dots... 相似文献
73.
Bahman Abdolhamidzadeh Che Rosmani Che Hassan Mahar Diana Hamid Sajjad FarrokhMehr Naser Badri Davood Rashtchian 《Process Safety and Environmental Protection》2012,90(5):424-429
On July 24th, 2010, several explosions and fires devastated a hydrocarbon processing plant in Kharg Island, Iran. Four workers were killed and many others were severely injured. The plant became out of service for 80 days. The way the accident happened and its sequence was representing as a domino accident. In this paper, events leading up to the disaster have been analyzed in details. Graphic presentation techniques such as Fish Bone Analysis and Event Sequence Diagram (ESD) have been utilized to enhance the understanding of the accident mechanism. Finally major lessons learnt from this domino accident have been addressed. 相似文献
74.
Marzieh Mokarram Hamid Reza Pourghasemi Huichun Zhang 《Frontiers of Environmental Science & Engineering》2020,14(6):114
75.
Y Kooch SM Hosseini C Zaccone H Jalilvand SM Hojjati 《Journal of environmental monitoring : JEM》2012,14(9):2438-2446
Following the ratification of the Kyoto Protocol, afforestation of formerly arable lands and/or degraded areas has been acknowledged as a land-use change contributing to the mitigation of increasing atmospheric CO(2) concentration in the atmosphere. In the present work, we study the soil organic carbon sequestration (SOCS) in 21 year old stands of maple (Acer velutinum Bioss.), oak (Quercus castaneifolia C.A. Mey.), and red pine (Pinus brutia Ten.) in the Darab Kola region, north of Iran. Soil samples were collected at four different depths (0-10, 10-20, 20-30, and 30-40 cm), and characterized with respect to bulk density, water content, electrical conductivity, pH, texture, lime content, total organic C, total N, and earthworm density and biomass. Data showed that afforested stands significantly affected soil characteristics, also raising SOCS phenomena, with values of 163.3, 120.6, and 102.1 Mg C ha(-1) for red pine, oak and maple stands, respectively, vs. 83.0 Mg C ha(-1) for the control region. Even if the dynamics of organic matter (OM) in soil is very complex and affected by several pedo-climatic factors, a stepwise regression method indicates that SOCS values in the studied area could be predicted using the following parameters, i.e., sand, clay, lime, and total N contents, and C/N ratio. In particular, although the chemical and physical stabilization capacity of organic C by soil is believed to be mainly governed by clay content, regression analysis showed a positive correlation between SOCS and sand (R = 0.86(**)), whereas a negative correlation with clay (R = -0.77(**)) was observed, thus suggesting that most of this organic C occurs as particulate OM instead of mineral-associated OM. Although the proposed models do not take into account possible changes due to natural and anthropogenic processes, they represent a simple way that could be used to evaluate and/or monitor the potential of each forest plantation in immobilizing organic C in soil (thus reducing atmospheric C concentration), as well as to select more appropriate species during forestation plan management at least in the north of Iran. 相似文献
76.
Alemeh Mazangi Hamid Ejtehadi Omid Mirshamsi Fereshte Ghassemzadeh Seyyed Saeed Hosseinianyousefkhani 《Russian Journal of Ecology》2016,47(4):349-354
Ferula xylorhachis Rech.f. is an endemic plant species belonging to the Apiaceae family and distributed in northeastern Iran. In the present study, we attempted to determine the factors with the greatest effects on the distribution of this species and to determine suitable regions for it based on current and future conditions. The Maximum Entropy method was used in the present study and the results indicated that the Mean Temperature of Wettest Quarter (48.2%), Precipitation of Wettest Quarter (49.1%), and Precipitation of Wettest Month (61.4%) are the most important factors in the current and in two future periods (2040 and 2070). The models suggest that suitable regions for the presence of this species will change over time and that the species will encounter limitations through changes such as moisture reduction. According to the A1B scenario, increases in greenhouse gases such as CO2 and CH4 will have direct effects on future precipitation and temperature and these factors will be important in determining species dispersion. Evaluation of important habitat factors using normal ecological methods will help in developing the best conservation programs in the future. Introducing species to new regions will help to protect them from the extinction risk caused by climate change. 相似文献
77.
78.
Ismail Ahmad Safwan Jawaid Mohammad Hamid Norul Hisham Yahaya Ridwan Hassan Azman Asim M. Supian A. B. M. 《Journal of Polymers and the Environment》2022,30(3):878-885
Journal of Polymers and the Environment - Nowadays, researchers continue studies for alternative materials to replace the redundant petroleum-based products. The combination of various polymer... 相似文献
79.
Yatoo Ali Mohd Ali Md. Niamat Zaheen Zarka Baba Zahoor Ahmad Ali Shafat Rasool Saiema Sheikh Tahir Ahmad Sillanpää Mika Gupta Pankaj Kumar Hamid Burhan Hamid Basharat 《Environmental Chemistry Letters》2022,20(4):2573-2596
Environmental Chemistry Letters - Two million tonnes of pesticides are currently used globally to improve crop production, yet these pesticides induce adverse effects on soil quality and... 相似文献
80.
Shabbir Anam Rehman Kanwal Akash Muhammad Sajid Hamid Akbar Moazzama Chaudhary Zunera Panichayupakaranant Pharkphoom Shah Muhammad Ajmal 《Environmental science and pollution research international》2022,29(45):67981-67996
Environmental Science and Pollution Research - Alzheimer’s disease (AD) is a slowly progressive brain degenerative disorder which gradually impairs memory, thinking, and ability to perform... 相似文献