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11.
Seyed Hashem Mousavi-Avval Shahin RafieeAli Jafari Ali Mohammadi 《Journal of Cleaner Production》2011,19(13):1464-1470
This study examines energy use patterns and the relationship between energy inputs and yield for canola production in Golestan province of Iran. Data used in this study were obtained from 130 randomly selected canola farms using a face to face survey. The results revealed that total energy of 17,786.36 MJ ha−1 was required for canola production and fertilizer, diesel fuel and electricity were the main energy consuming inputs. Energy use efficiency and energy productivity were 3.02 and 0.12 kg MJ−1, respectively. Moreover, in specifying a functional relationship the Cobb-Douglas production function was applied and the results showed that machinery, fertilizer, diesel fuel and water for irrigation energies significantly contributed to yield. Also, the marginal physical productivity (MPP) technique was applied to analyze the sensitivity of energy inputs. It was found that, canola production had more sensitivity on machinery, fertilizer and water for irrigation energies; so that an additional use of 1 MJ from each of the machinery, total fertilizer and water for irrigation would lead to an increase in production by 0.93, 0.61 and 0.24 kg, respectively. However, electricity and seed energies were contributed negatively to yield, which may result in inverse effect on yield and impose risks to the environment. 相似文献
12.
Nadeem Hashem 《Local Environment》2015,20(3):386-399
Greater Doha is experiencing lack of sufficient urban green spaces (UGS) as a result of rapid urbanisation to cater for the fast population growth in the country. The availability of green spaces and the improvement of the green/built-up area ratio have been recognised by planners as a key factor in improving the life quality of city dwellers. This study aims at addressing the adequacy and spatial distribution of public parks in Greater Doha. The current status of public parks is assessed in relation to the population distribution using GIS and remote sensing techniques. The results show that the majority of administrative zones fell well below the adopted public parks standards. The park provision ratio ranged from 0 and 0.03 through 0.43 and 0.48 to 0.92 and 0.99 hectare (ha) per 1000 population, with an average of 0.37. After quantifying this deficiency in UGS, the study suggest remedy by identifying vacant parcels in each zone to match the adopted standards, taking into consideration their spatial distribution and minimum area criteria. 相似文献
13.
Mostafa Islam Mohamed Nashwa Hashem Mohamed Basant Almeer Rafa Abulmeaty Mahmoud M. A. Bungau Simona G. El-Shazly Assem Mohamed Yahya Galal 《Environmental science and pollution research international》2022,29(18):26775-26791
Environmental Science and Pollution Research - Coronavirus disease 2019 (COVID-19) is a rapidly growing pandemic that requires urgent therapeutic intervention. Finding potential anti COVID-19 drugs... 相似文献
14.
Long-term land application of sewage sludge (SS) has caused concern over the potential release of trace metals into the environment following the degradation of organic matter (OM). This study was performed to assess the impact of OM degradation on the relative distribution of Cu, Zn, Pb, and As in SS and SS-amended soils. Three SSs of different ages and two soils treated with SS were subjected to incubation and direct chemical oxidation using diluted HO, followed by a sequential extraction. The majority of Cu, Pb, and As were bound to OM, whereas the majority of Zn was bound with Fe/Mn oxides for all three SSs. Incubation of SS for 6 mo did not result in a substantial decrease in OM content or a change in the relative distribution of Cu, Zn, Pb, and As. Direct OM oxidation to 30 and 70% by diluted HO resulted in a significant decrease in organically bound Cu but increased its exchangeable, carbonate-bound, and Fe/Mn-bound fractions. Oxidation of OM slightly decreased organically bound Zn but significantly increased exchangeable Zn in all SSs. Oxide- and carbonate-bound Zn also decreased following OM oxidation. Exchangeable fractions of As and Pb were minute before and after OM degradation, indicating that release into the environment would be unlikely. The relative distribution of Cu, Zn, Pb, and As in SS-treated soils was similar to that of SS, suggesting a dominant role of SS properties in controlling metal distribution following OM oxidation. Overall, OM oxidation increased the mobility and bioavailability of Zn and Cu, whereas it had less impact on Pb and As. 相似文献
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Ground and surface water contamination resulting from the leakage of crude oil and refined petroleum products is a serious and growing environmental problem throughout the world. Consequently, a study of the use of electrochemical treatment in the clean-up was undertaken with the aim of reducing the water contamination by aromatic pollutants to more acceptable levels. In the experiments described, water contamination by refined petroleum products was simulated under laboratory conditions. Electrochemical treatment, using aluminium electrodes, has been optimised by full factorial design and surface response analysis in term of BTEX and PAHs removal and energy consumption. The optimal conditions of pH, current density, electrolysis time, electrolyte type, and electrolyte concentration have then been applied in the treatment of real water samples which were monitored as petroleum contaminated samples. Treatment results have shown that electrochemical methods could achieve the concentration of these pollutants to undetectable levels in particular groundwater and surface water, hence, they can be highly effective in the remediation of water contaminated by aromatic hydrocarbons, and the use of these processes is therefore recommended. 相似文献
17.
Hashem Md. Abul Hasan Md. Anik Momen Md. Abdul Payel Sofia Hasan Mehedi Shaikh Md. Zillur Rahaman 《Environmental science and pollution research international》2022,29(21):31278-31292
Environmental Science and Pollution Research - The regular practice of using sodium chloride to preserve raw animal skin triggers increasing salinity and total dissolved solids (TDS) in the surface... 相似文献
18.
Dadashpoor Hashem Panahi Hossein 《Environment, Development and Sustainability》2021,23(9):13628-13649
Environment, Development and Sustainability - Spatial simulation of land-use change scenarios in metropolitan areas is essential for analyzing both the causes and consequences of various future... 相似文献
19.
Hammami Mohammad Bakri Alaa Mohammed Eman Qasem Hashem Anas Mohammad Al-Khafaji Mina Amer Alqahtani Fatima Alzaabi Shaikha Dash Nihar 《Environmental science and pollution research international》2017,24(25):20626-20633
Environmental Science and Pollution Research - Since the industrial revolution in the 1800s, plastic pollution is becoming a global reality. This study aims to assess knowledge and attitude about... 相似文献
20.
Md. Abul Hashem Md. Shahruk Nur-A-Tomal Nil Ratan Mondal Md. Aminur Rahman 《Environmental Chemistry Letters》2017,15(3):501-506
Heavy metals in the environment may be toxic for human and animals. Tanneries are a source of pollution by heavy metals. There is little information on heavy metals pollution in tanneries, especially on metals produced by the process of hair burning and liming. Liming is the first stage of chemical treatment where animal hair or wool is removed with sodium sulphide and calcium oxide. Here we studied cow, goat, buffalo and sheep hair, conventional liming agents and liming wastewaters from several sources. Samples were acid-digested and aliquots were analysed by atomic absorption spectroscopy following APHA standard method to measure concentrations of arsenic, lead, cadmium, zinc, manganese and iron. Results show that the range of metal contents in hair or wool and liming agents are 1.3–8.2 mg/kg for arsenic, 0.02–21.8 mg/kg for lead, 17.7–121.0 mg/kg for manganese, 7.3–141.1 mg/kg for zinc and 119.6–10613.8 mg/kg for iron. Liming wastewaters contain 1.9–5.6 µg/L arsenic, 0.03–6.05 µg/L lead, 38.6–139.0 µg/L manganese, 144.0–171.5 µg/L zinc and 399.5–1069.0 µg/L iron. Cadmium was below detection limits. This is the first investigation that reveals that hair burning liming operation is a potential source of heavy metals in the environment. 相似文献