ARTIFICIAL BARRIER FOR RIVERBANK FILTRATION AS IMPROVEMENT OF SOIL PERMEABILITY AND WATER QUALITY

2015 ◽  
Vol 74 (11) ◽  
Author(s):  
Nur Aziemah Abd Rashid ◽  
Mohd Hafidz Roslan ◽  
Nurulezzah Abd Rahim ◽  
Ismail Abustan ◽  
Mohd Nordin Adlan
Keyword(s):  
Water Quality ◽  
Activated Carbon ◽  
Sandy Loam ◽  
Soil Analysis ◽  
Granular Activated Carbon ◽  
High Volume ◽  
Initial Study ◽  
Riverbank Filtration ◽  
Water Abstraction ◽  
Local Soil

Soil strata abilities to drain water at high volume is the essential properties in RBF (Riverbank Filtration). An artificial barrier (AB) is a man-made vertical barrier to pre-treat water abstraction intake. It is a mixture of sand (local soil), granular activated carbon (GAC) and zeolite. In this work, AB was made to enhance the flow of groundwater as well as water quality. The soil analysis of borehole near Kerian River featured clay, sandy clay loam and sandy loam. In the study, a local soil was mixed Granular Activated Carbon (GAC) at 9:1 (10% GAC), 7:3 and 1:1 ratios. The immediate results are the permeability increased with the percentage of GAC. Further, similar tests were conducted with a mixture of local soil, GAC and zeolite in ratio of 5:2:3 in a laboratory scale physical model. The removal of turbidity and iron in a local soil (without GAC and zeolite) in the range of 59% - 88% and 74% - 87%, respectively. However, a better removal capacity of turbidity and iron were found in the mixture of local soil, GAC and zeolite up to 76% - 98.8% and 73% -92% removals respectively. In sum, the initial study indicate that the mixture of local soil, GAC and zeolite with a specific ratio could provide a pre-treatment of turbidity and iron removal in RBF abstraction. 

Biodegradation and attenuation of MIB and 2,4-D in drinking water biologically active sand and activated carbon filters

2019 ◽  
Vol 5 (5) ◽  
pp. 849-860 ◽  
Author(s):  
Kyle K. Shimabuku ◽  
Thomas L. Zearley ◽  
Katherine S. Dowdell ◽  
R. Scott Summers
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Biologically Active ◽  
Operational Conditions ◽  
Filter Performance ◽  
Contaminant Control ◽  
Variable Water ◽  
Trace Organic

Biologically acclimated sand and granular activated carbon (GAC) filter performance for trace organic contaminant control is compared under variable water quality and operational conditions.

The Potential and Benefits of Artificial Barrier Application at RBF

2015 ◽  
Vol 802 ◽  
pp. 611-616
Author(s):  
Nur Aziemah Abd Rashid ◽  
Nurulezzah Abd Rahim ◽  
Ismail Abustan ◽  
Rose Farahnadrah Munawar ◽  
Nur Atiqah Ahmad Awalludin
Keyword(s):  
Empirical Equation ◽  
Riverbank Filtration ◽  
Freundlich Model ◽  
Water Abstraction ◽  
Vertical Barrier ◽  
Local Soil ◽  
Freundlich Adsorption Isotherm ◽  
Iron And Zinc ◽  
Intake Structure ◽  
The Relationship

Water abstraction for water treatment of portable water especially riverbank filtration (RBF) is essential to be safe and clean. Due to the awareness towards the spread of contaminants and deterioration of water resources, the needs of artificial barrier is seen as crucial. An artificial barrier is a man-made vertical barrier to pre-treat the abstraction water from the water intake structure. The proposed artificial barrier is a mixture of sand (local soil), granular activated carbon (GAC) and zeolite. In this study, the three adsorbents were tested for their adsorption and permeability. The effects of adsorbent dose on the adsorption of the turbidity, iron and zinc were investigated. After treatment with sand, the levels of turbidity, iron and zinc were observed to decrease by 93.7%, 85.15% and 68.5%, respectively. For GAC, the levels of turbidity, iron and zinc decreased by 96.9%, 99.2% and 36.3%, respectively. The reduction on the levels of turbidity, iron and zinc was preferable by zeolite with 98.3%, 93.0% and 98.8%, respectively. By using Langmuir and Freundlich adsorption isotherm, the result indicated that the adsorption of adsorbents mostly obeyed Freundlich model. The relationship is an empirical equation which has an asymptotic maximum as pressure increase without bond.

scholarly journals A comparison of the efficiency of riverbank filtration treatments in different types of wells

Geologos ◽  
2018 ◽  
Vol 24 (3) ◽  
pp. 245-251 ◽  
Author(s):  
Józef Górski ◽  
Krzysztof Dragon ◽  
Roksana Kruć
Keyword(s):  
Water Quality ◽  
River Water ◽  
Horizontal Well ◽  
Riverbank Filtration ◽  
Physical Processes ◽  
Vertical Wells ◽  
Water Abstraction ◽  
Different Types ◽  
Physical And Chemical

Abstract In the paper, a comparison of the efficiency of riverbank treatments is outlined for the Krajkowo well field, where different methods of water abstraction are used. The water is extracted from 29 vertical wells that are located at a distance of 60–80 m from the channel of the River Warta and from a horizontal well with radial drains located 5 m below the bottom of the river. The results of a two-year water-quality investigation indicate that the water quality in both types of abstraction system is influenced by the quality of river water. The water quality observed in the horizontal well is closely similar to that of the river water, with similar concentrations of sulphates, nitrates and micropollutants, but a reduction in bacteriological contamination and plankton is clearly seen. The reduction in contaminants is mainly the result of physical processes, such as mechanical entrapment of suspended material and colloids as well as bacteria and plankton. In the vertical wells, the influence of contamination from river water is also visible, but the reduction in contamination is more significant, especially in cases of bacteria, plankton, micropollutants and nitrates, and is determined by both physical and chemical processes, such as sorption, dissolution, red-ox processes and denitrification. The present research shows that river water treatment is more effective in the case of vertical wells. The most favourable distance of a well from the channel of the river, from the perspective of water quality, is 150–200 m, which corresponds to a residence time of about six months.

scholarly journals Effects of coconut granular activated carbon pretreatment on membrane filtration in a gravitational driven process to improve drinking water quality

2011 ◽  
Vol 33 (6) ◽  
pp. 711-716 ◽  
Author(s):  
Flávia Vieira da Silva ◽  
Natália Ueda Yamaguchi ◽  
Gilselaine Afonso Lovato ◽  
Fernando Alves da Silva ◽  
Miria Hespanhol Miranda Reis ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Activated Carbon ◽  
Membrane Filtration ◽  
Granular Activated Carbon ◽  
Drinking Water Quality

Thermal stability and decomposition of perfluoroalkyl substances on spent granular activated carbon

2020 ◽  
Author(s):  
Feng Xiao ◽  
Bin Yao ◽  
Pavankumar Challa Sasi ◽  
Svetlana Golovko ◽  
Dana Soli ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Perfluoroalkyl Substances
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