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WASTEWATER TREATMENT USING PLANT LEAVES ASH
All over world the grey water problem is observed due to house hold activities i.e. bathing, cloth washing, etc. The treatment of grey water is very easy for now a days. The study shows that fresh rice husk can be used to treatment of grey water as a certain level and that water is used for domestic purpose like washing or irrigation purpose. The results of phisico-chemical like temperature, turbidity, viscosity, solids, pH, electrical conductivity, alkalinity, acidity, hardness, DO, BOD and COD results of experimental analysis of before and after treatment of grey water has been very satisfactory and shows that waste of paddy field (rice husk) is very much effective for treatment of grey water.
Heavy metals in drinking water pose a threat to the human health. The toxic metals be added into water deliver by manufacturing and housing waste or still from acidic precipitation breaking behind soils and producing into streams, lakes, rivers and groundwater. Iron and phosphorus plays an important role in the development of ecosystems, agriculture and industry, but also becomes a pollutant in the water bodies. Therefore it is necessary to remove iron and phosphorus from water. There are several methods aviliable for removal of iron and phosphorus present in water among these methods the biosorption is a simple, economical and environment-friendly method for removal of iron and phosphorus from water. Biosorption is a physiochemical process that occurs naturally in certain biomass which allows it to concentrate passively and bind contaminants onto its cellular structure. Every biosorbent had different physical, chemical and biological properties for iron and phosphorous removal from water. The mango leaves biosorbent is one of the best biosorbent for removal of iron and phosphorus from water. The optimum sorption over mango leaves biosorbents was obtained at basic pH is 4–8, dosage is 4.3 g, contact time is 60 min, temperature is 25 °C and agitation speed is 100 rpm. The performance of mango leaves biosorbents prepared in optimum conditions for iron and phosphorous sorption processes was associated with the modification in inherent textural and morphological characteristics such as measured by XRD, FTIR, BET and SEM-EDX techniques. The reusability of mango leaves biosorbent was also measured and found that mango leaves does not show any high level of significant change in its performances even after reuses for iron and phosphorous removal.
Ammonium ions wastewater pollution has become one of the most serious environmental problems today. The treatment of ammonium ions is a special concern due to their recalcitrance and persistence in the environment. In recent years, various methods for ammonium ion removal from wastewater have been extensively studied. This paper reviews the current methods that have been used to treat ammonium ion wastewater and evaluates these techniques. These technologies include ion exchange, adsorption, biosorption, wet air oxidation, biofiltration, diffused aeration, nitrification and denitrification methods. About 75 published studies (1979-2015) are reviewed in this paper. It is evident from the literature survey articles that ion exchange, adsorption and biological technology are the most frequently studied for the treatment of ammonium ion wastewater.
The ferric reducing antioxidant power (FRAP) and total phenolic concentration of the leaf, stem and root barks of Magnifera indica and Azadirachta indica growing in Ogbomoso, Nigeria were evaluated in vitro. Only the leaf of A. indica belonged to good FRAP. Both the stem and root bark of A. indica and all the parts of M. indica investigated belonged to high FRAP. Experimental results revealed that the antioxidant capacity ranged from 6.80 -9.20, 12.40 -13.00 and 10.20 -13.203 mM of reduced Fe 3+ for the leaf, stem and root bark, respectively in A. indica. In M. indica, the antioxidant capacity ranged from 12.20 -15.20, 11.00 -11.80 and 11.20 -12.20 mM of reduced Fe 3+ for the leaf, stem and root bark, respectively. The total phenolic concentration and antioxidant capacity of M. indica stem bark showed a high significant positive correlation (r = 0.9439; p = 0.05). The total phenolic concentration of the root bark of A. indica showed a high positive significant correlation with antioxidant capacity (r= 0.9850; p= 0.05). All the plant parts examined might be exploited in clinical medicine as protective factors because of their good and high antioxidant capacities.
Wood ash, which is recognized as an environmental pollutant, is tried as a new material for CO2 capture in this work. Five wood ash samples obtained from different raw materials were chosen, and an experimental demonstration of the CO2 capture performances of these wood ash samples was present in detail in a modified fixed bed reactor system. The CO2 capture and the sorbent regeneration performances of wood ash were investigated under different conditions by changing the temperature, H2O concentration, gas flow rate and the heating rate. The CO2 capture capacities are in the range of 0.35-0.54 mmol CO2/g for different wood ash samples under the condition of 60 degrees C, 10% CO2 + 12% H2O. The CO2 capture processes contain two parts for these samples. One is the physical adsorption process, and another is the chemical reaction of K2CO3 with CO2 and H2O to form KHCO3, K2CO3.1.5H(2)O and K4H2(CO3)(3).1.5H(2)O The desired wood ash is proved to be regenerable and stable during 10-cycle CO2 sorption-desorption tests. The deactivation model and the Avrami-Erofeyev model are adopted to evaluate the CO2 sorption and desorption kinetics of this sample respectively. Considering the low cost, and the recycling of environmental pollutants, wood ash is a nice choice for CO2 capture.
Bio-active compounds in mango (Mangifera indica L.) and their roles in human health and plant defence-A review
- H Rymbai
- M Srivastav
- R R Sharma
- C R Patel
- A K Singh
Rymbai, H.; Srivastav, M.; Sharma, R.R.; Patel, C.R.; Singh, A.K. (2013) Bio-active
compounds in mango (Mangifera indica L.) and their roles in human health and plant defence-A review. J. Hortic. Sci. Biotechnol, 88: 369-379.
Journal of Science and Technology
ISSN: 2456-5660 Volume 8, Issue 12 (Dec -2023)
www.jst.org.in
DOI:https://doi.org/10.46243/jst.2023.v8.i12.pp 40-45
Wastewater treatment-bed of coal fly ash for dyes and pigments industry
Syed Farman Ali Shah, Aziza Aftab, Noorullah Soomro, Mir Shah Nawaz and Kambiz Vafai
(2015) Wastewater treatment-bed of coal fly ash for dyes and pigments industry, Pak. J. Anal.
Environ. Chem. Vol. 16 (2): 48 -56.