Analysis of geological structure and anthropological factors affecting arsenic distribution in the Lahore aquifer,Pakistan   总被引：1，自引：0，他引：1  

Akhtar Malik Muhammad  Tang Zhonghua  Zakari Sissou  Bahaa Mohamadi  Muhsan Ehsan 《Hydrogeology Journal》2016,24(7):1891-1904

This study investigated the potential factors affecting arsenic concentration in the groundwater system of Lahore, Pakistan. The effects of several factors such as population density (PD), pumping rate (PR), impermeable land use (LU), surface elevation (SE), and water-table elevation (WL) on arsenic concentration were studied in 101 union councils of Lahore. Forty single and multi-factor models were established using geographic information system (GIS) techniques to develop an arsenic contamination map and to investigate the most effective combinations among factors. Additionally, statistical tests were used to evaluate arsenic concentration between classes of the same single factor. The arsenic concentration in the Lahore aquifer varied from 0.001 to 0.143 mg L^?1. The highest arsenic concentrations were detected in the Walled City and the town of Shahdara. Among the 40 raster models, groundwater arsenic concentration showed the best matching frequency with single-factor models for PD (50.70 %) and SE (47 %). Thus, PD and SE were used to develop an arsenic distribution raster map, and they were also used to study the effect of aquifer depth on arsenic concentration. PD was found to have hidden latent variables such as PR and LU. The shallow aquifer depth was negatively correlated with arsenic concentration (r?=??0.23) and positively with PR (r?=?0.15). Therefore, when there was high PR in wells with smaller aquifer depth, the arsenic concentration was high. The existing water treatment and alternative water resources are good options, which should be developed to deal with Lahore wells contaminated with arsenic at high concentrations.  相似文献   

Batch adsorption studies of the removal of methyl violet 2B by soya bean waste: isotherm,kinetics and artificial neural network modelling     

Muhammad Raziq Rahimi Kooh  Muhammad Khairud Dahri  Linda B. L. Lim  Lee Hoon Lim  Owais Ahmed Malik 《Environmental Earth Sciences》2016,75(9):783

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Supply-chain impacts of Sichuan earthquake: a case study using disaster input–output analysis     

Huang  Rui  Malik  Arunima  Lenzen  Manfred  Jin  Yutong  Wang  Yafei  Faturay  Futu  Zhu  Zhiyi 《Natural Hazards》2022,110(3):2227-2248

Natural Hazards - With the development of interregional trade, a potential disaster that happens in one place could cause enormous economic losses in distant areas. Timely and comprehensive...  相似文献   

Assessment of Vulnerability of Rock Slope Considering Material and Seismic Variability     

Nishant Roy  Rajib Sarkar  Kripamoy Sarkar  Mahesh Kumar Jat  Gaurav Fulwaria 《Journal of the Geological Society of India》2018,91(4):449-456

The Ghawar anticline (GA) is the super-giant anticline belonging to a set of giant anticlines called the Rayn anticlines (RA) developed in the Eastern Province (EP), Saudi Arabia. The RA is situated within the Arabian block microplate forming the distant foreland of the Zagros. For the first time, using the ‘Reviewed ISC Earthquake Catalogue’ for the period of 1970-2010, it is demonstrated that the EP crust is seismogenic down to a depth of ～15 km or more and has a typical surface width of ～220 km; this width is ostensibly six-times wider than that of GA. The Saudi Geological Survey (SGS) Earthquake Network Catalogue is utilized to study local seismicity. The GA is locally seismically active such that 826 events have occurred during the period of 2005-2010, with a maximum magnitude of ML 4.24. Magnitude completeness (Mc) analysis, based on the assumption of self-similarity, suggests that all local earthquakes above a cut-off magnitude of ³2.7 have been detected in EP. Certain basic estimates on the average depth of origin of the induced events and histogram plot on the frequency of induced and ambient (natural) seismicity are illustrated. The induced events came almost in equal proportions from the Uthmaniyah-Hawaiyah and Haradh production divisions belonging to the central and southern oil/gas Fields in GA. Poroelastic parameters of the reservoir are reviewed with respect to the induced seismicity. Focal-depth distribution of events along the strike direction of seismic zones follows the ‘En-Nala axis’ in the GA and is used, together with ISC data, to broadly define the seismogenic crust from a 3D-perspective. Seismic activity below both production divisions is supposedly triggered by hydrocarbon fluid-extraction; locally triggered seismicity shows better correlation to mutually opposite reverse faults transgressing the Haradh and Uthmaniyah-Hawaiyah production divisions under the influence of regional compressive stress oriented along N40°E. Results from four composite focal mechanism solutions also support this contention.  相似文献   

Contributions from Particles in Europe (PiE) 2010, Villefranche-sur-Mer,France: an introduction     

Ole?A.?MikkelsenEmail author  Malik?Chami  David?Doxaran 《Geo-Marine Letters》2012,32(2):85-87

This special issue of Geo-Marine Letters presents selected contributions from the international conference Particles in Europe (PiE) 2010 organized by Sequoia Scientific, Inc., and the Laboratoire d’Océanographie de Villefranche (LOV) on 15–17 November 2010 in Villefranche-sur-Mer, France, and guest-edited by Ole Mikkelsen, Malik Chami and David Doxaran. PiE was initiated in 2008, in order to promote and further our understanding of the importance of suspended particulate matter (SPM) for a very wide range of processes in the aquatic environment—from optics and acoustics, over sediment transport, to the global carbon balance. The papers in this special issue are in particular concerned with the interaction between SPM and water optical properties, as well as how to use optical proxy measurements to understand SPM processes. The next PiE conference is scheduled for 17–19 October 2012 in Barcelona, Spain.  相似文献   

Distribution,Risk Assessment,and Source Identification of Heavy Metals in Surface Sediments of River Soan,Pakistan          下载免费PDF全文

Summya Nazeer  Muhammad Zaffar Hashmi  Riffat Naseem Malik 《洁净——土壤、空气、水》2016,44(9):1250-1259

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Adsorption of Brilliant Green Dye on Biochar Prepared From Lignocellulosic Bioethanol Plant Waste          下载免费PDF全文

Muhammad Saif Ur Rehman  Ilgook Kim  Naim Rashid  Malik Adeel Umer  Muhammad Sajid  Jong‐In Han 《洁净——土壤、空气、水》2016,44(1):55-62

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Phytoremediation Potential of Hemp (Cannabis sativa L.): Identification and Characterization of Heavy Metals Responsive Genes          下载免费PDF全文

Rafiq Ahmad  Zara Tehsin  Samina Tanvir Malik  Saeed Ahmad Asad  Muhammad Shahzad  Muhammad Bilal  Mohammad Maroof Shah  Sabaz Ali Khan 《洁净——土壤、空气、水》2016,44(2):195-201

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Mineralogy,chemistry, and composition of organic compounds in the fresh carbonaceous chondrite Mukundpura: CM1 or CM2?     

S. Potin  P. Beck  L. Bonal  B. Schmitt  A. Garenne  F. Moynier  A. Agranier  P. Schmitt‐Kopplin  A. K. Malik  E. Quirico 《Meteoritics & planetary science》2020,55(7):1681-1696

We present here several laboratory analyses performed on the freshly fallen Mukundpura CM chondrite. Results of infrared transmission spectroscopy, thermogravimetry analysis, and reflectance spectroscopy show that Mukundpura is mainly composed of phyllosilicates. The rare earth trace elements composition and ultrahigh‐resolution mass spectrometry of the soluble organic matter give results consistent with CM chondrites. Finally, Raman spectroscopy shows no signs of thermal alteration of the meteorite. All the results agree that Mukundpura has been strongly altered by water on its parent body. Comparison of the results obtained on the meteorite with those of other chondrites of known petrologic types leads to the conclusion that Mukundpura is similar to CM1 chondrites, which differ from its original classification as a CM2.  相似文献   

Chemical Weathering of New Pyroclastic Deposits from Mt. Merapi （Java）, Indonesia     

Dian Fiantis  Malik Nelson  Eric Van Ranst  Jusop Shamshuddin  Nikolla P. Qafoku 《山地科学学报》2009,6(3):240-254

The Java Island, Indonesia with abundant amount of pyroclastic deposits is located in the very active and dynamic Pacific Ring of Fires. Studying the geochemical weathering indices of these pyroclastic deposits is important to get a clear picture about weathering profiles on deposits resulting from the eruption of Mt. Merapi. Immediately after the first phase of the eruption （March to June 2006）, moist and leached pyroclastic deposits were collected. These pyroclastic deposits were found to be composed of volcanic glass, plagioclase feldspar in various propoitions, orthopyroxene, clinopyroxene, olivine, amphibole and titanomagnetite. The total elemental composition of the bulk samples （including trace elements and heavy metals） was determined by wet chemical methods and X-ray fluorescence （XRF） analyses. Weathering of the pyroelastic deposits was studied using various weathering indices. The Ruxton ratio, weathering index of Parker, Vought resudual index and chemical index of weathering of moist pyroclastic deposits were lower than those of the leached samples, but the alteration indices （chemical and plagioclase） were slightly higher in the moist compared to the leached pyroelastic deposits.  相似文献