Activated carbon-gravity driven biomimetic membrane (AC-GDBM) for organic micro-polluted water treatment

Several types of water treatment technologies including adsorption are now being used to treat polluted water. In this paper the removal of phenol by adsorption will be discussed. Activated carbons are successfully applied for purification of potable water and the removal of organic pollutants in wastwater. This paper is concerned with a low cost approach to treating waste water that is significant especially for those countries where oil palm is an available agricultural product like Malaysia, Ivory Coast, Nigeria, Thailand, Papua New Guinea. In the coastal region coconut is an available agricultural product and activated carbon prepared using coconut shell is also an economical method of water treatment. The materials used in this study were Commercial Activated Carbon (CAC), prepared from coconut shell and Modified Oil Palm Shell (MOPAS) of 1 to 2 mm diameters. The surface area of CAC and MOPAS was 38.5 m2/g and 38.2 m2/g respectively and the iodine number was determined as 674 and 454 for CAC and MOPAS, respectively. From the study the result shows above 70% removal efficiency for 5 mg/L and 40% removal efficiency for 20 mg/L of phenol solution. The performance efficiency will be discussed based on batch test, following Freundlich adsorption isotherm.The results indicate that CAC exhibits a higher adsorptive capacity (Kf of 0.079) as compared to MOPAS (Kf of 0.048). Hence a better removal efficiency for CAC at lower concentration of phenol. Results from column tests show a better adsorptive capacity for CAC (2.73) as compared to MOPAS (2.48).

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Introduction and Analysis of the Techniques for the Removal of Phenol from Water

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.2466 ◽

2012 ◽

Vol 538-541 ◽

pp. 2466-2469

Author(s):

Dong Mei Liu ◽

Yue Wang ◽

Xue Bin Jia ◽

Dong Jun Zhang ◽

Yi Zou ◽

...

Keyword(s):

Activated Carbon ◽

Water Treatment ◽

Potable Water ◽

Waste Water Treatment ◽

Chemical Properties ◽

Polluted Water ◽

Extensive Literature ◽

High Concentration ◽

Removal Ratio ◽

Phenol Pollution

According to extensive literature research, we introduce and summarize both physical, chemical properties, main hazards of phenol and the recent phenol water pollutions. We get the problem that it’s hardly to meet the standard and ensure the safety of water supply because of the low removal ratio in the process of water treatment when the water source is polluted by sporadic phenol pollution. After we analyze and compare the removal technology in polluted water and potable water respectively, we know the removal ratio of polymeric aluminum chloride-powdered activated carbon and permanganate potassium- activated carbon is significantly higher than activated carbon only, but the output water couldn’t reach the standard when facing high concentration phenol pollution (500μg/L). The biological technologies and membrane methods used in waste water treatment are introducing into the potable water treatment.

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Gravity-driven biomimetic membrane (GDBM): An ecological water treatment technology for water purification in the open natural water system

Chemical Engineering Journal ◽

10.1016/j.cej.2020.125650 ◽

2020 ◽

Vol 399 ◽

pp. 125650 ◽

Cited By ~ 2

Author(s):

Zhenzhou Zhu ◽

Zhe Chen ◽

Xiao Luo ◽

Wenxiang Zhang ◽

Shujuan Meng

Keyword(s):

Water Treatment ◽

Water Purification ◽

Natural Water ◽

Water System ◽

Treatment Technology ◽

Gravity Driven ◽

Biomimetic Membrane ◽

Water Treatment Technology

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Cost-effective water treatment of polluted surface water by using direct filtration and granular activated carbon filtration

Water Science & Technology Water Supply ◽

10.2166/ws.2002.0028 ◽

2002 ◽

Vol 2 (1) ◽

pp. 233-240 ◽

Cited By ~ 2

Author(s):

J. Cromphout ◽

W. Rougge

Keyword(s):

Activated Carbon ◽

Water Treatment ◽

Treatment Process ◽

Treatment Plant ◽

Granular Activated Carbon ◽

Cost Effective ◽

Water Treatment Plant ◽

Direct Filtration ◽

Carbon Filtration ◽

Effective Water

In Harelbeke a Water Treatment Plant with a capacity of 15,000 m3/day, using Schelde river water has been in operation since April 1995. The treatment process comprises nitrification, dephosphatation by direct filtration, storage into a reservoir, direct filtration, granular activated carbon filtration and disinfection. The design of the three-layer direct filters was based on pilot experiments. The performance of the plant during the five years of operation is discussed. It was found that the removal of atrazin by activated carbon depends on the water temperature.

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Practical Guide to Determine the Impact of Radon and Other Radionuclides on Water Treatment Processes

Water Science & Technology ◽

10.2166/wst.1992.0568 ◽

1992 ◽

Vol 26 (5-6) ◽

pp. 1255-1264

Author(s):

K. L. Martins

Keyword(s):

Activated Carbon ◽

Water Treatment ◽

Environmental Protection Agency ◽

Treatment Plant ◽

Water Treatment Plant ◽

Packed Tower ◽

Treatment Processes ◽

Radioactivity Exposure ◽

The Impact ◽

Percent Removal

During treatment of groundwater, radon is often coincidentally removed by processes typically used to remove volatile organic compounds (VOCs)-for example, processes such as liquid-phase granular activated carbon (LGAC) adsorption and air stripping with vapor-phase carbon (VGAC). The removal of radon from drinking water is a positive benefit for the water user; however, the accumulation of radon on activated carbon may cause radiologic hazards for the water treatment plant operators and the spent carbon may be considered a low-level radioactive waste. To date, most literature on radon removal by water treatment processes was based on bench- or residential-scale systems. This paper addresses the impact of radon on municipal and industrial-scale applications. Available data have been used todevelop graphical methods of estimating the radioactivity exposure rates to facility operators and determine the fate of spent carbon. This paper will allow the reader to determine the potential for impact of radon on the system design and operation as follows.Estimate the percent removal of radon from water by LGAC adsorbers and packed tower air strippers. Also, a method to estimate the percent removal of radon by VGAC used for air stripper off-gas will be provided.Estimate if your local radon levels are such that the safety guidelines, suggested by USEPA (United States Environmental Protection Agency), of 25 mR/yr (0.1 mR/day) for radioactivity exposure may or may not be exceeded.Estimate the disposal requirements of the waste carbon for LGAC systems and VGAC for air stripper “Off-Gas” systems. Options for dealing with high radon levels are presented.

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High Performance Hybrid Capacitive Deionization with Ag-coated Activated Carbon Electrode

Environmental Science Water Research & Technology ◽

10.1039/d1ew00209k ◽

2021 ◽

Author(s):

Hongsik Yoon ◽

Jiho Lee ◽

Taijin Min ◽

Gunhee Lee ◽

Minsub Oh

Keyword(s):

Activated Carbon ◽

Water Treatment ◽

Industrial Application ◽

High Performance ◽

Treatment System ◽

Carbon Electrode ◽

Capacitive Deionization ◽

Water Treatment System

Capacitive deionization (CDI) has been highlighted as a promising electrochemical water treatment system. However, the low deionization capacity of CDI electrodes has been a major limitation for its industrial application,...

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