Synthesis, characterization and application of surface-modified biochar synthesized from rice husk, an agro-industrial waste for the removal of hexavalent chromium from drinking water at near-neutral pH

2018 ◽  
Vol 21 (2) ◽  
pp. 447-462 ◽  
Author(s):  
Arpan Sarkar ◽  
Ashish Ranjan ◽  
Biswajit Paul
Keyword(s):  
Drinking Water ◽  
Hexavalent Chromium ◽  
Rice Husk ◽  
Industrial Waste ◽  
Neutral Ph ◽  
Modified Biochar ◽  
Surface Modified

Protective Effect of Hypericum perforatum L. Extract on Hexavalent Chromium Induced Toxicity in Rat Adrenal Gland

2017 ◽  
Vol 68 (9) ◽  
pp. 2014-2017
Author(s):  
Jelena Savici ◽  
Oana Maria Boldura ◽  
Cornel Balta ◽  
Diana Brezovan ◽  
Florin Muselin ◽  
...  
Keyword(s):  
Drinking Water ◽  
Adrenal Gland ◽  
Hexavalent Chromium ◽  
Structural Damage ◽  
Hypericum Perforatum ◽  
Adrenal Glands ◽  
Expression Level ◽  
Apoptotic Pathway ◽  
Hypericum Perforatum L ◽  
Induction Of Apoptosis

This study was carried out to test the possibility of hexavalent chromium administration through drinking water to induce the structural damage in rat�s adrenal glands and the possibility of Hypericum perforatum extract to faith against chromium aggression. Chromium induced cellular stress was determined by the expression level assessment of the Bcl2 genes family, known to modulate the apoptotic pathway. Obtained results showed that exposure to chromium altered adrenal glands morphology, by induction of apoptosis. When Hypericum perforatum extract was administered expression level of Bcl2 genes and histological lesions in adrenal glands were significantly reduced.

Oral exposure to hexavalent chromium through drinking water and urologic morbidity in an industrial area of Greece

2015 ◽  
Vol 23 (5) ◽  
pp. 249-255 ◽  
Author(s):  
Dimitrios Karagiannis ◽  
Charalambos Deliveliotis ◽  
Eleni Papadimitriou ◽  
Elena Riza ◽  
Anastasia Lykou ◽  
...  
Keyword(s):  
Drinking Water ◽  
Hexavalent Chromium ◽  
Industrial Area ◽  
Oral Exposure ◽  
Of Greece

Hydraulic Conductivity of Compacted Tropical Clay Treated with Rice Husk Ash

2011 ◽  
Vol 367 ◽  
pp. 63-71 ◽  
Author(s):  
Adrian O. Eberemu ◽  
Agapitus A. Amadi ◽  
Joseph E. Edeh
Keyword(s):  
Hydraulic Conductivity ◽  
Water Content ◽  
Rice Husk ◽  
Industrial Waste ◽  
Rice Husk Ash ◽  
Waste Product ◽  
Dry Density ◽  
Waste Containment ◽  
Hydraulic Behaviour ◽  
Waste Containment Systems

Laboratory study on compacted tropical clay treated with up to 16% rice husk ash (RHA), an agro-industrial waste; to evaluate its hydraulic properties and hence its suitability in waste containment systems was carried out. Soil-RHA mixtures were compacted using standard Proctor, West African Standard and modified Proctor efforts at-2, 0, 2 and 4% of optimum moisture content (OMC). Compacted samples were permeated and the hydraulic behaviour of the material was examined considering the effects of moulding water content, water content relative to optimum, dry density and RHA contents. Results showed decreasing hydraulic conductivity with increasing moulding water content and compactive efforts; it also varied greatly between the dry and wet side of optimum decreasing towards the wet side. Hydraulic conductivity generally decreased with increased dry density for all effort. Hydraulic conductivity increased with rice husk ash treatment at the OMC; but were within recommended values of 1 x 10-7 cm/s for up to 8% rice husk ash treatment irrespective of the compactive effort used. This shows the suitability of the material as a hydraulic barrier in waste containment systems for up to 8% rice husk ash treatment and beneficial reuse of this agro-industrial waste product.

scholarly journals Efektivitas Saringan Abu Sekam Padi untuk Menurunkan Kekeruhan pada Air Sungai Martapura

2019 ◽  
Vol 15 (2) ◽  
pp. 647
Author(s):  
Syarifudin A. ◽  
Imam Santoso
Keyword(s):  
Drinking Water ◽  
River Water ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Preliminary Test ◽  
Quality Standard ◽  
Clean Water ◽  
Research Needs ◽  
The One ◽  
Number Of Bacteria

Abstract: The Effectiveness of Rice Husk Ash Filter to Reduce Turbidity of Martapura River Water. Martapura River water is used by people living on riverbanks for cooking, washing, bathing, and others. The main problem of Martapura river water is the turbidity which is relatively high so it needs to be processed first before use. The preliminary test conducted on August 15, 2016 shows the value of turbidity of Martapura river water at 38.9 NTU. This research was an experimental research with the one group pretest and posttest design which aimed to determine the effectiveness of the filter to reduce the turbidity of Martapura river water. The medium used was rice husk ash with variation of thickness were 13 cm, 26 cm, and 39 cm. The effectiveness of filtration was determined by comparing the turbidity of water filtered with standards. The turbidity of Martapura river water before filtered was 35.7 NTU. After filtered by 13 cm, 26 cm and 39 cm filter, the turbidity of water decreased consecutive to 2.97 NTU, 1.17 NTU, and 0.95 NTU, with decreasing percentages respectively of 91.7%, 96.7% and 97.3%. All filtered water showed turbidity fulfilled both the standar of clean water and drinking water so that rice husk ash filter was effective decreased turbidity of Martapura river water. Filtered water is recommended to be cooked first to boil when used for drinking water because the number of bacteria of Coli has not been studied. Further research needs to be conducted by adding other parameters according to water quality standard

Surface-modified biochar in a bioretention system for Escherichia coli removal from stormwater

Chemosphere ◽  
2017 ◽  
Vol 169 ◽  
pp. 89-98 ◽  
Author(s):  
Abbe Y.T. Lau ◽  
Daniel C.W. Tsang ◽  
Nigel J.D. Graham ◽  
Yong Sik Ok ◽  
Xin Yang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bioretention System ◽  
Modified Biochar ◽  
Surface Modified

Methanotrophs for Clean-Up of Polluted Aquifers

1991 ◽  
Vol 24 (11) ◽  
pp. 9-17 ◽  
Author(s):  
K. Halden ◽  
H. A. Chase
Keyword(s):  
Drinking Water ◽  
Microbial Populations ◽  
Distilled Water ◽  
Rich Medium ◽  
Methylosinus Trichosporium Ob3b ◽  
Methylosinus Trichosporium ◽  
Pump And Treat ◽  
Neutral Ph ◽  
Chlorinated Pollutants

Aquifers are vital reserves of drinking water which are under threat from pollution. Particular problems are posed by chlorinated compounds such as pesticides and solvents which native microbial populations are unable to degrade. Pump and treat regimes have proved unsuccessful since pollutants remain adsorbed to sediments but a possible solution is the use of introduced microorganisms to degrade pollutants in-situ. It is suggested that methanotrophs may be suitable candidates. Methanotrophs have an extraordinary range of degradative powers due to the non-specificity of their methane mono-oxygenase enzyme. We have shown that Methylosinus trichosporium OB3b is capable of degrading many common chlorinated pollutants co-metabolically when it is grown in a copper-depleted, oxygen-rich medium at neutral pH. In the subsurface however, such conditions do not exist and cultures grown in a medium made with untreated Cambridge aquifer water have a reduced range of degradative powers compared to similar cells grown in a medium made with distilled water. This means that to use methanotrophs for aquifer clean-up, the cells may need to be cultured above ground in ideal conditions and then introduced by some method of injection or infiltration. This may be possible because the degradative reactions are not coupled to growth and Methylosinus trichosporium OB3b cells maintain pollutant degrading ability up to 19 days after they have stopped growing. A suspension of these cells may thus be treated as a biocatalyst.

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