排序方式: 共有39条查询结果,搜索用时 15 毫秒
1.
Athar Habib-ur-Rehman Ambreen Sarah Javed Muhammad Hina Mehwish Rasul Sumaira Zafar Zafar Ullah Manzoor Hamid Ogbaga Chukwuma C. Afzal Muhammad Al-Qurainy Fahad Ashraf Muhammad 《Environmental science and pollution research international》2016,23(18):18320-18331
Environmental Science and Pollution Research - Maize tolerance potential to oil pollution was assessed by growing Zea mays in soil contaminated with varying levels of crude oil (0, 2.5 and... 相似文献
2.
Effluents collected from tanneries in Sialkot showed considerably higher levels of heavy metals. Sodium (12 660.91 mg/L) among macronutrients and Cr (592.20 mg/L) among heavy metals were found in the highest concentrations. Effluent parameters, i.e. biological oxygen demand (BOD; 12.40), chemical oxygen demand (COD; 16.53), Cd (5.90), Cr (592.20) and Fe (18.59) were the respective times higher than Pakistan National Environmental Quality Standards and their continuous unchecked discharge into agricultural soils poses a potential risk. Mean concentrations (mg/L) of Cr (592.20), Ni (2.66), Mn (1.16), Fe (37.17), Zn (0.90), Cd (0.59) and Pb (1.18) in this study exceeded levels recorded to date from different tanning hubs in Pakistan. Factor analysis/principal components analysis (FA/PCA) for the effluent parameters resulted in six varimax factors, i.e. VF1 (salinity, electrical conductivity, total dissolved solids, chloride, phosphate, BOD and COD; including characteristic tannery effluent features), VF2 (pH, Cr and alkalinity; tanning operations), VF3 (Cd and Pb; dyeing processes), VF4 (Mn and Fe; finishing operations), VF5 (Ni; retaining processes) and VF6 (hardness, Ca and Cu; bating processes). Cluster analysis performed on metal data resulted in three clusters confirming metal–metal relations obtained either from FA/PCA or a correlation matrix. The results of this study are useful for heavy metal source apportionment, assessment of risk to peripheral soils and the future management of environments around tanneries. 相似文献
3.
Ashraf Mahsoon Zeshan Muhammad Hafeez Sadia Hussain Rahib Qadir Abdul Majid Muzaffar Ahmad Farman Ahmad Sajid Rashid 《Environmental science and pollution research international》2022,29(25):37129-37143
Environmental Science and Pollution Research - This study investigated the seasonal and temporal variations in the extent and source of physiochemical and toxic trace elements in the Lakhodair... 相似文献
4.
Javid Manzoor Mamta Rayavarapu Jaganadha Rao 《International journal of occupational safety and ergonomics》2016,22(4):473-478
Aim. The aim of the present study was to identify and evaluate predominant noise sources in the cricket bat industry of Kashmir, India. Methods. Sound levels were measured at operator’s ear level in the working zone of the workers of seven cricket bat factories. The impact assessment was made through personal interviews with each worker separately during their period of rest. Results. On average, 62.5% of the workers reported difficulty in hearing and 24.1% of the workers have become patients for hypertension. Only 58.1% of the workers complained of headache due to high noise level. Conclusions. The workers engaged in the cricket bat industry of Kashmir are exposed to high noise levels. It is suggested that personal protective equipment like ear plugs and ear muffs be used by these workers as a protection against this hazard. 相似文献
5.
Naqvi Anber Qadir Abdul Mahmood Adeel Baqar Mujtaba Aslam Iqra Sajid Farhan Mumtaz Mehvish Li Jun Zhang Gan 《Environmental science and pollution research international》2018,25(15):14551-14562
Environmental Science and Pollution Research - The present study biomonitored the placental polychlorinated biphenyl (PCB) concentrations in women from Punjab Province, Pakistan, that provides the... 相似文献
6.
Ahmad Manzoor Khattak Shoukat Iqbal Khan Anwar Rahman Zia Ur 《Environmental and Ecological Statistics》2020,27(2):203-232
Environmental and Ecological Statistics - The paper proposes a new perspective in the environmental and resource economics literature by examining innovation (measured by R&D expenditures),... 相似文献
7.
Aghabalayev Faig Ahmad Manzoor 《Environmental science and pollution research international》2023,30(6):14545-14564
Environmental Science and Pollution Research - Recognizing that innovation in renewable energy generation is an effective way to improve sustainable energy generation, the government and industries... 相似文献
8.
Weimin Zhu Chishti Muhammad Zubair Rehman Abdul Ahmad Manzoor 《Environment, Development and Sustainability》2022,24(4):4786-4809
Environment, Development and Sustainability - The prior empirical research focuses on examining only the procyclical impact of innovation on carbon emissions (CO2e), in the majority of cases, for... 相似文献
9.
Spatio-temporal variations in water quality of Nullah Aik-tributary of the river Chenab, Pakistan 总被引:4,自引:0,他引:4
This study reports the spatio-temporal changes in water quality of Nullah Aik, tributary of the Chenab River, Pakistan. Stream
water samples were collected at seven sampling sites on seasonal basis from September 2004 to April 2006 and were analyzed
for 24 water quality parameters. Most significant parameters which contributed in spatio-temporal variations were assessed
by statistical techniques such as Hierarchical Agglomerative Cluster Analysis (HACA), Factor Analysis/Principal Components
Analysis (FA/PCA), and Discriminant Function Analysis (DFA). HACA identified three different classes of sites: Relatively
Unimpaired, Impaired and Less Impaired Regions on the basis of similarity among different physicochemical characteristics
and pollutant level between the sampling sites. DFA produced the best results for identification of main variables for temporal
and spatial analysis and separated eight parameters (DO, hardness, sulphides, K, Fe, Pb, Cr and Zn) that accounted 89.7% of
total variations of spatial analysis. Temporal analysis using DFA separated six parameters (E.C., TDS, salinity, hardness,
chlorides and Pb) that showed more than 84.6% of total temporal variation. FA/PCA identified six significant factors (sources)
which were responsible for major variations in water quality dataset of Nullah Aik. The results signify that parameters identified
by statistical analyses were responsible for water quality change and suggest the possibility of industrial, municipal and
agricultural runoff, parent rock material contamination. The results suggest dire need for proper management measures to restore
the water quality of this tributary for a healthy and promising aquatic ecosystem and also highlights its importance for objective
ecological policy and decision making process. 相似文献
10.
The Seymour aquifer region of Texas has been identified as containing elevated levels of nitrate in ground water. Various state and federal agencies are currently studying policy options for the region by gathering more site-specific information. However, because of lack of sufficient information, cause and effect relationships between water quality and agricultural practices have not been well established for the region. Some recently available biophysical simulation models have impressive capabilities in generating large amounts of data on environmental pollution resulting from agricultural production practices. In this study, the data generated by a biophysical simulation model were used to estimate the nitrate percolation response functions for the Seymour aquifer region. Interestingly, nitrate percolation values obtained from simulation models often comprise acensoredsample because the non-zero percolation values are only observed under certain climatic events and input levels. It has been shown in the econometric literature that the use of Ordinary Least Squares (OLS) on censored sample data produces biased and inconsistent parameter estimates. Thus, a sample selection model was used in this study to estimate the response functions for nitrate percolation. The study provides some insight into the relationship between nitrate percolation and agricultural production practices. In particular, the study demonstrates the potential of selected design standards in minimizing agricultural nonpoint-source (NPS) pollution for the study area. 相似文献