排序方式: 共有39条查询结果,搜索用时 15 毫秒
11.
Usman Muhammad Murtaza Behzad Natasha Natasha Imran Muhammad Abbas Ghulam Amjad Muhammad Shahid Muhammad Ibrahim Sobhy M. Owens Gary Murtaza Ghulam 《Environmental monitoring and assessment》2022,194(2):1-30
Environmental Monitoring and Assessment - Few estuaries remain unaffected by water management and altered freshwater deliveries. The Caloosahatchee River Estuary is a perfect case study for... 相似文献
12.
Afify Marwa Adel Ahmed Iman Gamal Ghareeb Alkahtani Theeb Ayedh Altulayhi Raed Ibrahim Alrowili Amjad Saud Mhrb Ghozy Sherief Bin-Jumah May Abdel-Daim Mohamed M. 《Environmental science and pollution research international》2021,28(9):10576-10588
Environmental Science and Pollution Research - This research aims to study the safety and efficacy of doravirine in the treatment of HIV-1 (human immunodeficiency virus) patients. We conducted an... 相似文献
13.
nSiO_2纳米颗粒是一种广泛应用的工程纳米材料,为增加其对水溶液中Cd~(2+)的吸附性能,采用接枝改性的方法制备出乙二胺四乙酸(EDTA)改性nSiO_2纳米颗粒(EDTA-nSiO_2),并用透射电镜、氮气吸附-解吸、红外光谱和差热分析等手段对其进行了结构表征,同时以其为吸附剂,通过批处理实验法探讨了体系pH、吸附时间、温度、离子强度等因素对Cd~(2+)吸附的影响,并结合X射线能谱(XPS)分析对其吸附机制进行了分析.结果表明,以EDTA为改性剂,可以成功制备出稳定性良好的EDTA-nSiO_2纳米颗粒,其对Cd~(2+)的吸附受体系p H控制;nSiO_2对Cd~(2+)的吸附量较小,EDTA改性可增加nSiO_2对Cd~(2+)的吸附作用,随着p H的升高,Cd~(2+)的吸附效果逐渐增强,在p H大于4.0后逐渐趋于稳定.EDTA-nSiO_2对Cd~(2+)的吸附速率较快,可在1 h内达到吸附平衡.EDTA-nSiO_2对Cd~(2+)的吸附为吸热的自发过程,吸附等温线可用Langmuir模型描述.NaCl浓度增加会导致Cd~(2+)的吸附量下降,当体系Na Cl浓度从0增加到100 mmol·L~(-1),Cd~(2+)的最大吸附量从0.433 mmol·g-1降低至0.294mmol·g-1.0.1 mol·L~(-1)HCl是较为合适的吸附剂再生液,Cd~(2+)洗脱率约94.36%.结合pH、温度、离子强度、再生和XPS分析结果,可以推测出EDTA-nSiO_2对Cd~(2+)的吸附是包含有简单的物理吸附和离子交换过程,并以化学络合为主的吸附过程.EDTA-nSiO_2是一种对水体Cd~(2+)具有较好吸附能力的工程纳米材料吸附剂. 相似文献
14.
Amjad Ahmad Abbass Kashif Hussain Yasir Khan Farina Sadiq Shahzad 《Environmental science and pollution research international》2022,29(44):66622-66639
Environmental Science and Pollution Research - The idea of sustainable development and green supply chain management is considered at the underlying stage in the research and academic fields,... 相似文献
15.
Zooplankton samples from the North Arabian Sea Environment and Ecosystem Research (NASEER) cruises were analyzed to determine
the basic taxonomic composition, biomass (standing stock) and the total and copepod numeric abundance; these characteristics
are discussed with reference to the different monsoon periods. Cruises carried out during March 1993 and May 1994, categorized
as pre-southwest monsoon periods, and a cruise in December 1994, categorized as a northeast monsoon period, are discussed
in detail. The biomass of January 1992 versus August 1992 and August 1992 versus March 1993 differed significantly (F = 6.44, P≤ 0.05). Ranges of highest and lowest biomass from each cruise are also given. Distinct “high” and “low” production areas
of statistically significant difference (F = 12.67, P≤ 0.05) were observed. The “high” and “low” production areas were mobile and followed the surface wind circulation patterns
(wind reversal pattern) during the northeast and southwest monsoon periods. Overall zooplankton showed a patchy distribution.
The overall zooplankton abundance and total copepod counts differed significantly between the Cruises 3 versus 4 and 4 versus
5 (F = 15.67, P≤ 0.05 and F = 34.39, P≤ 0.05, respectively). There was no significant difference (P≥ 0.05) in biomass, between eutrophic and oligotrophic stations, suggesting no difference between near shore and offshore
waters. Thirty-eight taxonomic groups were identified from the samples, with copepods being the most dominant group, followed
by chaetognaths and siphonophores. Copepods constitute an average of 52.50 to 74.93% of the total zooplankton count and reach
maxima of 92.14% of the total zooplankton count at the outset of the southwest monsoon (March 1993) and 91.39% at the outset
of the active northeast monsoon (December 1994).
Received: 27 February 1998 / Accepted: 8 October 1999 相似文献
16.
Saeed Usman Khan Asim Laeeq Gilani Mazhar Amjad Aslam Muhammad Khan Asad Ullah 《Environmental science and pollution research international》2021,28(26):33994-34008
Environmental Science and Pollution Research - Betaine-based natural deep eutectic solvents (NADESs), a new class of green solvents, were immobilized into a porous polyvinylidene fluoride (PVDF)... 相似文献
17.
Chhay Leaksmy Reyad Md Amjad Hossain Suy Rathny Islam Md Rafiqul Mian Md Manik 《Journal of Material Cycles and Waste Management》2018,20(3):1761-1770
Journal of Material Cycles and Waste Management - In the developing countries, the inadequacy of basic waste data is a significant obstacle for municipal solid waste management. To evaluate an... 相似文献
18.
Hassan Taghipour Zahra Amjad Mohamad Asghari Jafarabadi Akbar Gholampour Parviz Nowrouz 《Waste management (New York, N.Y.)》2014,34(7):1251-1256
From environmental viewpoint, the most important advantage of compact fluorescent lamps (CFLs) is reduction of green house gas emissions. But their significant disadvantage is disposal of spent lamps because of containing a few milligrams of toxic metals, especially mercury and lead. For a successful implementation of any waste management plan, availability of sufficient and accurate information on quantities and compositions of the generated waste and current management conditions is a fundamental prerequisite. In this study, CFLs were selected among 20 different brands in Iran. Content of heavy metals including mercury, lead, nickel, arsenic and chromium was determined by inductive coupled plasma (ICP). Two cities, Tehran and Tabriz, were selected for assessing the current waste management condition of CFLs. The study found that waste generation amount of CFLs in the country was about 159.80, 183.82 and 153.75 million per year in 2010, 2011 and 2012, respectively. Waste generation rate of CFLs in Iran was determined to be 2.05 per person in 2012. The average amount of mercury, lead, nickel, arsenic and chromium was 0.417, 2.33, 0.064, 0.056 and 0.012 mg per lamp, respectively. Currently, waste of CFLs is disposed by municipal waste stream in waste landfills. For improving the current conditions, we propose by considering the successful experience of extended producer responsibility (EPR) in other electronic waste management. The EPR program with advanced recycling fee (ARF) is implemented for collecting and then recycling CFLs. For encouraging consumers to take the spent CFLs back at the end of the products’ useful life, a proportion of ARF (for example, 50%) can be refunded. On the other hand, the government and Environmental Protection Agency should support and encourage recycling companies of CFLs both technically and financially in the first place. 相似文献
19.
Imran Muhammad Islam Azhar Ul Tariq Muhammad Adnan Siddique Muhammad Hussnain Shah Noor Samad Khan Zia Ul Haq Amjad Muhammad Din Salah Ud Shah Ghulam Mustafa Naeem Muhammad Asif Nadeem Muhammad Nawaz Muhammad Rizwan Muhammad 《Environmental science and pollution research international》2019,26(24):24489-24502
Environmental Science and Pollution Research - The present study aims at evaluating the batch scale potential of cotton shell powder (CSP), Moringa oleifera leaves (ML), and magnetite-assisted... 相似文献
20.
Yin Liu Matthias C. Rillig Quan Liu Jingjing Huang Muhammad Amjad Khan Xiaohui Li Qin Liu Qingqing Wang Xuesong Su Linyi Lin Yang Bai Genmao Guo Yi Huang Yong Sik Ok Shan Hu Junfeng Wang Honggang Ni Qing Huang 《Frontiers of Environmental Science & Engineering》2023,17(9):110