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11.
Natarajan Narayanan Vasudevan Mangottiri Dineshkumar Senthil Kumar Nandhini Sivakkumar Shiva Balaganesh Pandiyan 《Environmental science and pollution research international》2022,29(20):29399-29408
Environmental Science and Pollution Research - Recent advancements in environmental monitoring and analysis have created public and institutional awareness on the social and health impacts of air... 相似文献
12.
Karthika Chenmala Sureshkumar Raman Sajini Deepak Vasudevan Ashraf Ghulam Md. Rahman Md. Habibur 《Environmental science and pollution research international》2022,29(42):63202-63215
Environmental Science and Pollution Research - Colorectal cancer was inducted in Wister rats using titanium dioxide nanoparticles (TiO2NPs) and dimethylhydrazine (DMH) and treatment using... 相似文献
13.
Devaraj Vigneshkumar Mangottiri Vasudevan Balu Soundara 《Environmental science and pollution research international》2023,30(6):14008-14028
Environmental Science and Pollution Research - The construction industry is experiencing an increasing demand for sustainable alternative materials. There is huge scope for converting the... 相似文献
14.
Structural insights on bioremediation of polycyclic aromatic hydrocarbons using microalgae: a modelling-based computational study 总被引:1,自引:0,他引:1
Pandian SureshKumar Jibu Thomas Vasudevan Poornima 《Environmental monitoring and assessment》2018,190(2):92
Research on bioremediation of polycyclic aromatic hydrocarbons (PAHs) has established that several remediating microbial species are capable of degrading only low molecular weight (LMW)-PAHs, whereas high molecular weight (HMW)-PAHs are hardly degradable. In the present study, the efficiency of degradation of both LMW and HMW-PAHs by cytochrome P450 monooxygenase (CYP) of microalgae was studied. CYP have a key role in the detoxification of xenobiotics. So far, the structure of CYP in microalgae is not predicted; the protein structure was constructed by molecular modelling in the current study using the available template of microalgal CYP. Modelled microalgae 3D structures were docked against 38 different PAH compounds, and the information regarding the interaction between protein and PAHs viz. binding sites along with mode of interactions was investigated. We report that CYP from the microalgae Haematococcus pluvialis and Parachlorella kessleri was found to possess broad oxidising capability towards both LMW and HMW-PAHs. P. kessleri showed a least value with extra precision glide score of ? 10.23 and glide energy of ? 23.48 kcal/mol. PAHs bind to CYP active sites at Lys 69, Trp 96, Gln 397 and Arg 398 through intermolecular hydrogen bonding. Also, study revealed that PAHs interacted with CYP active sites through intermolecular hydrogen bonding, hydrophobic bonding, π–π interactions and van der waals interactions. Thus, structural elucidation study confirms that microalgae Parachlorella kessleri have the capacity to remediate HMW more efficiently than other microorganisms. Our results provide a framework in understanding the structure and the possible binding sites of CYP protein for degradation of PAH and that could be a screening tool in identifying the phycoremediation potential. 相似文献
15.
Protonated form (Hy) of yeast was subjected to thermal analysis (TGA and DTG) in the temperature range 60–800 °C. Chemically bound water volatilizes around 200 °C and the matrix undergoes extensive oxidative decomposition at 450 °C, the weight loss reaching 75% at 800 °C. The sorption capacity of the matrix for nickel(II) ion increases on heat treatment from 60 to 200 °C (from 16.9 to 25.0 mg/g), but was reduced on heating to higher temperatures at an initial nickel(II) ion concentration of 1200 mg/g. The FTIR spectra of Hy and nickel(II) ion saturated yeast, indicated that biosorption occurs on the sugar and nucleic acid regions, possibly involving –COOH and –NH groups. 相似文献
16.
Ramakrishnan Kamaraj Pandian Ganesan Jothinathan Lakshmi Subramanyan Vasudevan 《Environmental science and pollution research international》2013,20(1):399-412
Purpose and aim
In general, direct current (DC) is used in an electrocoagulation processes. In this case, an impermeable oxide layer may form on the cathode as well as corrosion formation on the anode due to oxidation. This prevents the effective current transfer between the anode and cathode, so the efficiency of electrocoagulation processes declines. These disadvantages of DC have been diminished by adopting alternating current (AC) in electrocoagulation processes. The main objective of this study is to investigate the effects of AC and DC on the removal of copper from water using magnesium alloy as anode and cathode.Materials and methods
Magnesium alloy of size 2.0 dm2 was used as anode and as cathode. To optimize the maximum removal efficiency, different parameters like effect of initial concentration, effect of temperature, pH, and effect of current density were studied. Copper adsorbed magnesium hydroxide coagulant was characterized by SEM, EDAX, XRD, and FTIR.Results
The results showed that the optimum removal efficiency of copper is 97.8 and 97.2 % with an energy consumption of 0.634 and 0.996 kWh/m3 at a current density of 0.025 A/dm2, pH of 7.0 for AC and DC, respectively. The adsorption of copper is preferably fitting the Langmuir adsorption isotherm for both AC and DC respectively. The adsorption process follows the second-order kinetics model with good correlation. Temperature studies showed that adsorption was endothermic and spontaneous in nature.Conclusions
The magnesium hydroxide generated in the cell removes the copper present in the water, reducing the copper concentration to less than 1 mg/L, making it safe for drinking. The results of the scale-up study show that the process was technologically feasible. 相似文献17.
This study provides an electrocoagulation process for the removal of copper from water using mild steel and stainless steel as anode and cathode, respectively. The effect of different operating parameters and coexisting ions on the removal efficiency of copperwas investigated. The results showed that the optimum removal efficiency of 97.8% was achieved at a current density of 0.02 A/dm2 and a pH of 7.0. The adsorption of copper, preferably fitting the Langmuir adsorption isotherm, suggests monolayer coverage of adsorbed molecules. First-and second-order rate equations and Elovich and intraparticle diffusion models were applied to study adsorption kinetics. The adsorption process follows the second-order kinetics model with good correlation. Temperature studies showed that adsorption was endothermic and spontaneous in nature. 相似文献
18.
Pandian Ganesan Ramakrishnan Kamaraj Ganapathy Sozhan Subramanyan Vasudevan 《Environmental science and pollution research international》2013,20(2):987-996
A batch adsorption process was applied to investigate the removal of manganese from aqueous solution by oxidized multiwalled carbon nanotubes (MWCNTs). In doing so, the thermodynamic, adsorption isotherm, and kinetic studies were also carried out. MWCNT with 5–10-nm outer diameter, surface area of 40–600 m2/g, and purity above 95 % was used as an adsorbent. A systematic study of the adsorption process was performed by varying pH, ionic strength, and temperature. Manganese-adsorbed MWCNT was characterized by Raman, FTIR, X-ray diffraction, XPS, SEM, and TEM. The adsorption efficiency could reach 96.82 %, suggesting that MWCNT is an excellent adsorbent for manganese removal from water. The results indicate that second-order kinetics model was well suitable to model the kinetic adsorption of manganese. Equilibrium data were well described by the typical Langmuir adsorption isotherm. Thermodynamic studies revealed that the adsorption reaction was spontaneous and endothermic process. The experimental results showed that MWCNT is an excellent manganese adsorbent. The MWCNTs removed the manganese present in the water and reduced it to a permissible level making it drinkable. 相似文献
19.
Ramya Kaliamoorthi Vasudevan Namasivayam 《Environmental science and pollution research international》2019,26(20):20595-20609
Environmental Science and Pollution Research - The appropriate operation of wastewater treatment plants is essential to maintain the quality of treated water. The aim of the present study is to... 相似文献
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