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1.
Bai S Srikantaswamy S Krishnanandan V Naik OP 《Environmental monitoring and assessment》2012,184(1):239-249
Urban wastewater treatment leads to the generation of large quantities of biosolids. Accumulation of biosolids is a problem
of environmental relevance due to the existence of heavy metals in the biosolids. Determination of total metal in biosolid
provides information relating pollution levels. Determination of their mobilization capacity and behaviour in the environment
is an important task. An experimental approach commonly used for studying the mobility, transport and bioavailability of metal
in biosolids is the use of selective sequential extraction procedure. In the present study an attempt has been made to study
the heavy metal properties in biosolid samples collected from urban wastewater treatment plants located at Mysore, Karnataka.
Few heavy metals selected for the present study are cadmium, chromium, copper, iron, nickel and zinc. The concentration of
these metals in biosolids and their partition in different fractions are studied. The speciation of metals based on the sequential
extraction scheme was carried out. The concentration of heavy metals is lower than that established by European legislation.
The residual fraction has the maximum percentage of heavy metals whereas, only a small fraction of heavy metals (Fe, Zn and
Cd) are extracted in the most soluble fractions, exchangeable and carbonate fractions. 相似文献
2.
A retrospective study on severity analysis of Indian coal mines accidents for 100 years was done considering fatal and serious accidents and the resulting causalities. The impact of recommendations based on safety conferences and committees over the years was studied. An event evaluation algorithm (EEA) was developed for this purpose. The hazard rate functions and cumulative risk functions for major hazards in Indian coal mines were developed. The study evaluated the status of safety level as well as the scope of improvement for Indian coal mines safety. 相似文献
3.
In this study, the generation of reactive oxygen species, the induction of oxidative stress, and the response of the antioxidative system in hydroponically grown tomato plants as the cause of arsenic-induced phytotoxicity are investigated. Reduction in plant growth was measured in terms of dry weight and length of roots and shoots, the latter accumulating more arsenic than the roots. The treatment resulted in increased formation of superoxide anion (O2.?), H2O2, and thiobarbituric acid reactive substances, which indicate augmented lipid peroxidation. Superoxide dismutase, catalase (CAT), and ascorbate peroxidase activities were increased in arsenic-treated tomato plants while CAT activity was insignificantly increased. 相似文献
4.
Gaur Vivek Kumar Gupta Shivangi Pandey Ashok 《Environmental science and pollution research international》2022,29(41):61821-61837
Environmental Science and Pollution Research - Increasing petroleum consumption and a rise in incidental oil spillages have become global concerns owing to their aquatic and terrestrial toxicity.... 相似文献
5.
Antioxidative responses in relation to growth of mustard (Brassica juncea cv. Pusa Jaikisan) plants exposed to hexavalent chromium 总被引:1,自引:0,他引:1
Effect of hexavalent chromium (Cr6+) was seen on Brassica juncea cv. Pusa Jaikisan grown for 15 days in hydroponic culture supplemented with 0.2, 2 and 20 microM Cr. The inhibitory response of Cr6+ on growth of B. juncea was concentration and time dependent. The stimulation of plant growth, observed in response to exposure to 0.2 microM Cr6+, during initial 5 days was reversed on prolonged treatment and at higher Cr6+ concentrations (2 and 20 microM Cr6+). Despite reduction in growth, chlorophyll content increased substantially on 15 days exposure to 20 microM Cr6+. Significant increases in lipid peroxidation and tissue concentration of H2O2 occurred in plants exposed to 2 and 20 microM Cr6+. Effect of Cr6+ on antioxidative enzymes in roots and leaves was differential. SOD and CAT activities at lower levels of Cr6+ supply remained higher all through the treatment. While APX was very susceptible to excess Cr6+, GR and GST increased at elevated levels of Cr6+. The results suggested Cr6+ induced depression in plant growth of B. juncea to be a function of increased cellular accumulation of Cr despite increase in the activities of some of the antioxidative enzymes. 相似文献
6.
SINGH Shuchi SOOD Anchal SHARMA Shivesh KUMAR Vivek SINGH Kamal Deep PANDEY Piyush 《应用与环境生物学报》2007,13(3):357-360
The rhizospheres of established tea bushes have some specificcharacteristics which are associated with the long lived nature of teaplants,viz.,negative rhizospheric effect,lowering of soil pH,antagonistic activities among microbial communities and dominan… 相似文献
7.
Lichen samples collected in and around Hetauda Industrial area,(HIA) Narayani zone, Makwanpur district, Nepal, were analyzedfor Cr, Ni, Pb, Zn, Ca, Mn, Fe, Si, and Al. The samples fromthe location inside the industrial area have higher levels ofmetal than the outside areas. Pyxine meissnerina growinginside the industrial area accumulated higher levels of all themetals analyzed. 相似文献
8.
Malik Vivek Singh Ravindra Khaiwal Singh Meenu 《Environmental science and pollution research international》2021,28(47):66519-66521
Environmental Science and Pollution Research - 相似文献
9.
Jayshri A. Thote Ravikrishna V. Chatti Kartik S. Iyer Vivek Kumar Arti N. Valechh Nitin K. Labhsetwar Rajesh B. Biniwale M. K. N. Yenkie Sadhana S. Rayalu 《环境科学学报(英文版)》2012,24(11):1979-1984
N-doped mesoporous alumina has been synthesized using chitosan as the biopolymer template. The adsorbent has been thoroughly investigated for the adsorption of CO2 from a simulated flue gas stream (15% CO2 balanced with N2) and compared with commercially available mesoporous alumina procured from SASOL, Germany. CO2 adsorption was studied under different conditions of pre-treatment and adsorption temperature, inlet CO2 concentration and in the presence of oxygen and moisture. The adsorption capacity was determined to be 29.4 mg CO2/g of adsorbent at 55℃. This value was observed to be 4 times higher in comparison to that of commercial mesoporous alumina at a temperature of 55℃. Basicity of alumina surface coupled with the presence of nitrogen in template in synthesized sample is responsible for this enhanced CO2 adsorption. Adsorption capacity for CO2 was retained in the presence of oxygen; however moisture had a deteriorating effect on the adsorption capacity reducing it to nearly half the value. 相似文献
10.
In this paper, a comprehensive review of the concepts of occupational injury and accident causation and prevention is presented. Starting with hazard identification, the issues on risk assessment, accident causation, and intervention strategies are discussed progressively. The distinctiveness and overlaps in accident and injury research are highlighted. Both empirical research in terms of hypotheses tested and theoretical research such as accident causation models are compared and contrasted. Finally, based on the critical appraisal of the comprehensive review, future research directions on occupational injury research are delineated. 相似文献