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1.
Sharma Navneet Kaushal Arun Yousuf Abrar Sood Anil Kaur Samanpreet Sharda Rakesh 《Environmental science and pollution research international》2023,30(1):515-531
Environmental Science and Pollution Research - Erosion of soil by water coupled with human activities is considered as one of the... 相似文献
2.
Kaur Sandeep Kumar Ajay Pandit Kritika Kaur Satwinderjeet 《Environmental science and pollution research international》2021,28(6):6619-6634
Environmental Science and Pollution Research - The present study investigated the antimutagenic, antioxidant, and antiproliferative properties of extracts of Cassia fistula prepared by sequentially... 相似文献
3.
Kaur Ishnoor Behl Tapan Sehgal Aayush Singh Sukhbir Sharma Neelam Aleya Lotfi Bungau Simona 《Environmental science and pollution research international》2021,28(28):37060-37081
Environmental Science and Pollution Research - Mitochondria are unique cell organelles, which exhibit multifactorial roles in numerous cell physiological processes, significantly... 相似文献
4.
Gupta Amit Behl Tapan Aleya Lotfi Rahman Md. Habibur Yadav Harlokesh Narayan Pal Giridhari Kaur Ishnoor Arora Sandeep 《Environmental science and pollution research international》2021,28(16):19601-19614
Environmental Science and Pollution Research - Type 2 diabetes (T2D) is one of the most widely spread metabolic disorder also called as “life style” disease. Due to the alarming number... 相似文献
5.
Biodegradation of polycyclic aromatic hydrocarbons (PAHs) by fungal enzymes: A review 总被引:1,自引:0,他引:1
Tayssir Kadri Tarek Rouissi Satinder Kaur Brar Maximiliano Cledon Saurabhjyoti Sarm Mausam Verma 《环境科学学报(英文版)》2017,29(1):52-74
Polycyclic aromatic hydrocarbons (PAHs) are a large group of chemicals. They represent an
important concern due to their widespread distribution in the environment, their
resistance to biodegradation, their potential to bioaccumulate and their harmful effects.
Several pilot treatments have been implemented to prevent economic consequences and
deterioration of soil and water quality. As a promising option, fungal enzymes are regarded
as a powerful choice for degradation of PAHs. Phanerochaete chrysosporium, Pleurotus ostreatus
and Bjerkandera adusta are most commonly used for the degradation of such compounds
due to their production of ligninolytic enzymes such as lignin peroxidase, manganese
peroxidase and laccase. The rate of biodegradation depends on many culture conditions,
such as temperature, oxygen, accessibility of nutrients and agitated or shallow culture.
Moreover, the addition of biosurfactants can strongly modify the enzyme activity. The removal of PAHs is dependent on the ionization potential. The study of the kinetics is not completely comprehended, and it becomes morem hallenging when fungi are applied for bioremediation. Degradation studies in soil are much more complicated than liquid cultures because of the heterogeneity of soil, thus, many factors should be considered when studying soil bioremediation, such as desorption and bioavailability of PAHs. Different degradation pathways can be suggested. The peroxidases are heme-containing enzymes having common catalytic cycles. One molecule of hydrogen peroxide oxidizes the resting enzyme withdrawing two electrons. Subsequently, the peroxidase is reduced back in two steps of one electron oxidation. Laccases are copper-containing oxidases. They reduce molecular oxygen to water and oxidize phenolic compounds. 相似文献
6.
Due to rapid industrialization and urbanization during last two decades, contamination of soils by heavy metals is on an increase globally. Lands under peri-urban agriculture are the worst affected. In NCT, Delhi about 14.4% of land area is chemically degraded. In order to take care of this problem, recently the Supreme Court of India ordered to shift various non-confirming (about 39,000 units) industries to regions outside NCT, Delhi. However in spite of this, there have been several reports and parliamentary debates on the phyto-toxicity and extensive accumulation of heavy metals in the region. Literature review revealed that the basis of these debates is a few studies on some point locations in/around Delhi. It was further observed that information on the distribution and extent of heavy metal pollution problem in the region was completely missing. The present study was thus basically aimed at assessing the spatial distribution/extent and type of heavy metal pollution in the study area, for enabling future designing of appropriate site-specific management measures by the decision makers.For this, detailed spatial information on bio-available heavy metal concentrations in the soils and surface/sub-surface waters of NCT (Delhi) was generated through actual soil/water surveys, standard laboratory methods and GIS techniques. The study showed that concentration of all micronutrients (viz. Zn: 0.05–0.18 ppm; Cu: in traces; Fe: 0–0.5 ppm; and Mn: 0–1.2 ppm) and most heavy metals (viz. Ni: 0–0.7 ppm; Pb: 0–0.15 ppm and Cd: in traces) in the surface/sub-surface irrigation waters were well within permissible limits. However Cr concentrations in irrigation waters of Alipur and Shahdara blocks were far above their maximum permissible limit of 1 ppm. It was further observed that Ni and Cr concentrations in the drinking waters of almost entire test area were far above maximum permissible levels of 0.02 and 0.01 ppm, respectively. Bio-available concentrations of several heavy metals (viz. Pb: 0.1–2 ppm; Cd: traces; Ni: 0.05–2 ppm and Cr: 0–0.4 ppm) in the study area soils were also observed to be well within the maximum permissible limits. However there were point Cu contaminations (5–10 ppm) in the sewage-sludge amended soils of vegetable growing areas near south Shahdara block. This was attributed to increased Cu availability due to oxidized acidic conditions generated by over-irrigation of agricultural lands. Available Mn concentrations in Kanjhawala, western Najafgarh and Alipur soils were also observed to be above maximum permissible limit of 10 ppm. This was observed to be mainly due to the geology (i.e. presence of Mn rich sedimentary rocks) and prevalence of reduced acidic conditions, due to paddy cultivation, in these areas. It was further observed that there is acute zinc (Zn) deficiency (< 0.6 ppm) in paddy growing soils of north Kanjhawala, Alipur and some parts of Najafgarh and Shahdara blocks due to extensive leaching of available Zn fractions to lower soil horizons. Similar available Zn deficiencies in high pH (8.5) soils of areas around Bamnoli village in E-Najafgarh block were also observed. 相似文献
7.
8.
Fish scales as indicators of wastewater toxicity from an international water channel Tung Dhab drain
The effect of wastewater exposure on scales and chromatophores of freshwater fish Channa punctatus was studied using wastewater dilutions (60–100%) from an international water channel Tung Dhab drain at an interval of 15
and 30 days. The exposed fish showed significant alterations such as uprooted and damaged lepidonts and dispersal of chromatophores.
These observations strongly suggest that fish scales can be successfully employed as indicators of wastewater pollution. 相似文献
9.
Harsh Kumar Rajdeep Palaha Navreet Kaur Wankhede Swapnil Ratnakar Aakanksha Sodi Manmeet Kaur Richa Katiyar Mamta Sharma Charanpreet Kaur Virendra Kumar 《Environmental monitoring and assessment》2015,187(1):1-11
Eighteen sites impacted by abandoned mine drainage (AMD) in Pennsylvania were sampled and measured for pH, acidity, alkalinity, metal ions, and sulfate. This study compared the accuracy of four acidity calculation methods with measured hot peroxide acidity and identified the most accurate calculation method for each site as a function of pH and sulfate concentration. Method E1 was the sum of proton and acidity based on total metal concentrations; method E2 added alkalinity; method E3 also accounted for aluminum speciation and temperature effects; and method E4 accounted for sulfate speciation. To evaluate errors between measured and predicted acidity, the Nash-Sutcliffe efficiency (NSE), the coefficient of determination (R 2), and the root mean square error to standard deviation ratio (RSR) methods were applied. The error evaluation results show that E1, E2, E3, and E4 sites were most accurate at 0, 9, 4, and 5 of the sites, respectively. Sites where E2 was most accurate had pH greater than 4.0 and less than 400 mg/L of sulfate. Sites where E3 was most accurate had pH greater than 4.0 and sulfate greater than 400 mg/L with two exceptions. Sites where E4 was most accurate had pH less than 4.0 and more than 400 mg/L sulfate with one exception. The results indicate that acidity in AMD-affected streams can be accurately predicted by using pH, alkalinity, sulfate, Fe(II), Mn(II), and Al(III) concentrations in one or more of the identified equations, and that the appropriate equation for prediction can be selected based on pH and sulfate concentration. 相似文献
10.
Singh HP Sharma VP Batish DR Kohli RK 《Environmental monitoring and assessment》2012,184(4):1813-1821
Indiscriminate adoption and use of cell phone technology has tremendously increased the levels of electromagnetic field radiations
(EMFr) in the natural environment. It has raised the concerns among the scientists regarding the possible risks of EMFr to
living organisms. However, not much has been done to assess the damage caused to plants that are continuously exposed to EMFr
present in the environment. The present study investigated the biochemical mechanism of interference of 900 MHz cell phone
EMFr with root formation in mung bean (Vigna radiata syn. Phaseolus aureus) hypocotyls, a model system to study rhizogenesis in plants. Cell phone EMFr enhanced the activities of proteases (by 1.52
to 2.33 times), polyphenol oxidases (by 1.5 to 4.3 times), and peroxidases (by 1.5 to 2.0 times) in mung bean hypocotyls over
control. Further, EMFr enhanced malondialdehyde (an indicator of lipid peroxidation), hydrogen peroxide, and proline content,
indicating a reactive oxygen species-mediated oxidative damage in hypocotyls. It was confirmed by the upregulation in the
activities of antioxidant enzymes (superoxide dismutase, ascorbate peroxidase, guaiacol peroxidase, catalase, and glutathione
reductase) suggesting their possible role in providing protection against EMFr-induced oxidative damage. The study concluded
that cell phone radiations affect the process of rhizogenesis through biochemical alterations that manifest as oxidative damage
resulting in root impairment. 相似文献