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121.
Mohammed J.K. Bashir Mohamed Hasnain Isa Shamsul Rahman Mohamed Kutty Zarizi Bin Awang Hamidi Abdul Aziz Soraya Mohajeri Izharul Haq Farooqi 《Waste management (New York, N.Y.)》2009,29(9):2534-2541
This study investigated the electrochemical oxidation of stabilized leachate from Pulau Burung semi-aerobic sanitary landfill by conducting laboratory experiments with sodium sulfate Na2SO4 (as electrolyte) and graphite carbon electrodes. The control parameters were influent COD, current density and reaction time, while the responses were BOD removal, COD removal, BOD:COD ratio, color and pH. Na2SO4 concentration was 1 g/L. Experiments were conducted based on a three-level factorial design and response surface methodology (RSM) was used to analyze the results. The optimum conditions were obtained as 1414 mg/L influent COD concentration, 79.9 mA/cm2 current density and 4 h reaction time. This resulted in 70% BOD removal, 68% COD removal, 84% color removal, 0.04 BOD/COD ratio and 9.1 pH. Electrochemical treatment using graphite carbon electrode was found to be effective in BOD, COD and color removal but was not effective in increasing the BOD/COD ratio or enhancing biodegradability of the leachate. The color intensity of the treated samples increased at low influent COD and high current density due to corrosion of electrode material. 相似文献
122.
Mashura Shammi Nazmul Hasan Md. Mostafizur Rahman Kohinoor Begum Md. Tajuddin Sikder Mohammad Hossain Bhuiyan Md. Khabir Uddin 《The Environmentalist》2017,37(3):243-260
Pesticides, regardless of their known toxic impacts to human health and environment, are widely used in the rapid growing agricultural sectors of developing countries. As an agricultural country with small lands and enormous population to feed, a developing country like Bangladesh rely heavily on the uses of pesticides to increase crop yields. Nevertheless, during the past decades, Peoples’ Republic of Bangladesh has experienced 26.46% decrease in total pesticide consumption. However, the presence of unregistered pesticides in the environmental samples and agricultural products has pointed out the weakness in the existing legal regime of the pesticide governance. This, in turn, is threatening the livelihood and health of the farmers, food safety and consumer health. This paper reviews the antiquity of the status of pesticide consumption, evolution and drawbacks of pesticide in the context of existing socio-economic position of Bangladesh. A consolidated uniform system is lacking to project pesticide management in the country. Existing legal policy, rules and regulations in the context of international agreements regarding pesticide management have been reviewed and suggested for further amendment. Moreover, role of green microfinance in sustainable management of pesticides and food safety were recommended. A framework is proposed for pesticide governance with a stronger pesticide surveillance program and coordination of ministries interlinking environmental, occupational health and food safety. 相似文献
123.
Xinquan Zhang A. Senthil Kumar Mustafizur Rahman Chandra Nath Kui Liu 《Journal of Manufacturing Processes》2012,14(3):378-387
The elliptical vibration cutting (EVC) technique has been found to be a promising technique for ultraprecision machining of various materials. In each overlapping EVC cycle, the thickness of cut (TOC) of work material, and the tool velocity get continuously varied. These two inherent phenomena, in fact, introduce transient characteristics into its cutting mechanics, which are considered to be different from the one applied for conventional cutting technique. Recently, a few theoretical models have been developed to understand the material removal mechanism with the EVC technique; however, in those studies, the transient phenomena were not considered. In the present research, an analytical force model for the orthogonal EVC process was developed in order to fully understand the EVC mechanism, and to more accurately predict the transient cutting force values. Three important factors: (i) transient TOC, (ii) transient shear angle, and (iii) transition characteristic of friction reversal were investigated and analyzed mainly based on geometric modeling and the Lee and Shaffer's slip-line solution. Mathematical evaluation shows that they may have significant influence on EVC process, and thus on its output performance. In order to validate the proposed force model, a series of low-frequency orthogonal EVC tests were conducted. The experimental transient cutting force values were compared with the predicted values calculated using the proposed model, and they are found to be in a good agreement with each other. 相似文献
124.
Murshed Muntasir Rahman Md. Aminur Alam Md Shabbir Ahmad Paiman Dagar Vishal 《Environmental science and pollution research international》2021,28(36):49967-49988
Environmental Science and Pollution Research - Environmental sustainability has become a major concern for policymakers across the globe. In this regard, understanding the factors responsible for... 相似文献
125.
Nadia Adnan Shahrina Mohammad Nordin Imran Rahman Mohammad Hadi Amini 《Environmental science and pollution research international》2017,24(22):17955-17975
With the rising concern about climate change, there has been an increased public awareness that has resulted in new government policies to support scientific research for mitigating these problems. Malaysia is among the major energy-intense countries and is under an excessive burden to advance its energy efficiency and to also work towards the reduction of its carbon emission. Plug-in hybrid electric vehicles (PHEVs) have the potential to lessen the carbon emission and gasoline consumption in order to alleviate environmental problems. Most of the energy problems linked to the increasing transportation pollution are now being reduced with the solution of the adoption of PHEVs. PHEVs are seen as a solution to cut carbon emission, which prevents environmental damages. Furthermore, PHEVs’ driving range and performance can be comparable to the other hybrid vehicles as well as the conventional IC engines that have gasoline and diesel tanks. Thus, many efforts are being initiated to promote the use of PHEVs as an innovative and affordable transportation system. In order to achieve making the consumers aware of the adoption of PHEVs, we used a model which is based on the extended theory of planned behavior (TPB). This review is based on the factors affecting the adoption of PHEVs among Malaysian consumers. The model takes into account the ten key features that influence the adoption of PHEVs, such as environmental concern, personal norm, attitude, vehicle ownership costs, driving range, charging time, intention, subjective norm, perceived behavioral control, and personal norm. All these constructs are drivers towards the adoption of PHEVs. These factors affect the relationship between the adoption of PHEVs and how consumers intend to protect the environment. This review is based on improving how the “attitude-action” gap is understood as it is an important element for further studies on PHEVs. The aim of the research is to come up with a framework that examines how to modify the consumer’s environmental concerns in acquiring PHEVs. This will pave the way for more academic research and future works that can emphasize how to obtain empirical results. The authors’ recommendation is that, before a consumer’s behavior is assessed and considered, an observation of the current technology is needed with methods and knowledge of the existing technology adoption aspect. 相似文献
126.
Su Teng Ahmad Ishtiaq Qayyum Abdul Yin Weihua Rahman Saeed ur Adeel-Farooq Rana Muhammed 《Environmental science and pollution research international》2021,28(47):66930-66940
Environmental Science and Pollution Research - Energy consumption is widely regarded as the primary driver of economic development and environmental degradation. The current study examines how... 相似文献
127.
Kheng Soo Tay Noorsaadah Abd. Rahman Mhd. Radzi Bin Abas 《Environmental Chemistry Letters》2010,8(4):331-337
Ozone degradation of a mixture containing methylparaben, ethylparaben, propylparaben, butylparaben and benzylparaben was carried
out in aqueous solution. The degradation followed the pseudo-first-order kinetic model and occurs with two ozonation stages
with the observed rate constants of second stage ozonation, k
obs2, being higher than the observed rate constants in first stage, k
obs1. The k
obs1 of parabens was found to increase exponentially whilst k
obs2 was found to maximize at 35°C. Both k
obs1 and k
obs2 were found to decrease exponentially with respect to the initial concentration of parabens. Both pH and ozone dose showed
positive effects on the rate of degradation. It was also observed that an ozone dose of 0.67 g/h resulted in the removal of
99% of parabens in 12 min, and also the removal of 61 and 32% of chemical oxygen demand (COD) and total organic carbon (TOC),
respectively, in 3 h of ozonation time for a 500 μM of solution of parabens. 相似文献
128.
Rahman Zia ur Ahmad Saeed Fidel Rivka Khalid Salma Ahmad Iqbal Humphrey Olivier S. Khan Hizbullah Khan Bushra 《Environmental geochemistry and health》2021,43(9):3615-3624
Environmental Geochemistry and Health - This study aimed to determine the status of groundwater contamination with faecal coliform and nitrate in the rural areas of Mardan district, Pakistan. Both... 相似文献
129.
Implementing inherent safety throughout process lifecycle 总被引:3,自引:0,他引:3
Markku Hurme Mostafizur Rahman 《Journal of Loss Prevention in the Process Industries》2005,18(4-6):238-244
Inherent safety should be implemented as early as possible in the design life cycle, since the changes in process design are easier and cheaper the earlier they are done. The problem is, how to evaluate process alternatives in the terms of inherent safety in the early design phases, when much of the information is missing. In this paper the process life cycle phases and the possibilities of implementing and evaluating inherent safety are discussed. The applicability and accuracy of an inherent safety index method is presented by a case study. 相似文献
130.
Mostafizur Rahman Anna-Mari Heikkil Markku Hurme 《Journal of Loss Prevention in the Process Industries》2005,18(4-6):327-334
In conceptual design, process routes can be compared and ranked by using inherent safety indices. In this paper, some inherent safety index methods presented in literature are compared and their properties and limitations discussed. As a case study, an inherent safety evaluation of methyl methacrylate process routes is presented. Three index based inherent safety evaluation methods are compared with expert evaluations on methyl methacrylate process routes and their subprocesses. Also the index based inherent safety ranking of process routes is compared with an expert ranking. 相似文献