Removal of humic acid and chloroform from drinking water by using commercial nanofiltration and reverse osmosis membranes

2017 ◽  
Vol 59 ◽  
pp. 48-54 ◽  
Author(s):  
Ahmed Abdel-Karim ◽  
Tarek A. Gad-Allah ◽  
Mohamed I. Badawy ◽  
Ahmed S.G. Khalil ◽  
Mathias Ulbricht
Keyword(s):  
Drinking Water ◽  
Humic Acid ◽  
Reverse Osmosis ◽  
Reverse Osmosis Membranes

Performance of nanofiltration and reverse osmosis membranes for arsenic removal from drinking water

2015 ◽  
Vol 57 (43) ◽  
pp. 20422-20429 ◽  
Author(s):  
Harun Elcik ◽  
Suna O. Celik ◽  
Mehmet Cakmakci ◽  
Bestamin Özkaya
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
Arsenic Removal ◽  
Reverse Osmosis Membranes

scholarly journals The Effects of Humic Acid Fouling on the Performane of Polyamide Composite Reverse Osmosis Membranes

2016 ◽  
Vol 132 (8) ◽  
pp. 123-128
Author(s):  
Ryohei TANAKA ◽  
Yuya SAMU ◽  
Tasuma SUZUKI ◽  
Masakazu NIINAE ◽  
Lin LIN ◽  
...  
Keyword(s):  
Humic Acid ◽  
Reverse Osmosis ◽  
Reverse Osmosis Membranes

Antiscaling efficacy of CaCO3and CaSO4on polyethylene glycol (PEG)-modified reverse osmosis membranes in the presence of humic acid: interplay of membrane surface properties and water chemistry

2017 ◽  
Vol 19 (7) ◽  
pp. 5647-5657 ◽  
Author(s):  
Jessica R. Ray ◽  
Whitney Wong ◽  
Young-Shin Jun
Keyword(s):  
Polyethylene Glycol ◽  
Humic Acid ◽  
Water Chemistry ◽  
Reverse Osmosis ◽  
Surface Properties ◽  
Membrane Surface ◽  
Reverse Osmosis Membrane ◽  
Membrane Surfaces ◽  
Colloidal Formation ◽  
Reverse Osmosis Membranes

A specific polyethylene glycol (PEG)–humic acid–SO42−interaction results in promoted CaSO4colloidal formation on PEG reverse osmosis membrane surfaces.

Performance Study of Some Reverse Osmosis Systems for Removal of Uranium and Total Dissolved Solids in Underground Waters of Punjab State, India

2014 ◽  
Vol 4 (2) ◽  
pp. 467-476
Author(s):  
Nisha Sharma ◽  
Jaspal Singh ◽  
Barjinder Kaur
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
State Government ◽  
Total Dissolved Solids ◽  
Internal Exposure ◽  
Drinking Water Source ◽  
Performance Study ◽  
Dissolved Solids ◽  
Underground Waters ◽  
High Concentrations

Radionuclides (uranium, thorium, radium, radon gas etc.) are found naturally in air, water, soil and rock. Everyday, we ingest and inhale these radionuclides through the air we breathe and through food and water we take. Out of the internal exposure via ingestion of radionuclides, water contributes the major portion. The natural radioactivity of water is due to the activity transfer from bed rock and soils. In our surveys carried out in the past few years, we have observed high concentrations of uranium and total dissolved solids (TDS) in drinking waters of some southern parts of Punjab State exceeding the safe limits recommended by national and international agencies. The main drinking water source is the underground water procured from different depths. Due to the highly saline taste, disorders in their digestive systems and other ailments, people are installing reverse osmosis (RO) systems in their houses. Some RO systems have been installed on commercial basis. The state government is also in the process of installing community RO systems at the village level. As high values of uranium are also undesired and may pose health hazards due to radioactivity and toxicity of uranium, we have conducted a survey in the field to study the performance of various RO systems for removal of uranium and TDS. Water samples from about forty RO systems from Faridkot, Mansa, Bathinda and Amritsar districts of Punjab State were collected and analyzed. Our results show that some RO systems are able to remove more than 99% of uranium in the underground waters used for drinking purposes. TDS values are also reduced considerably to the desired levels. So RO systems can be used to avoid the risk of unduly health problems posed by high concentrations of uranium and TDS in drinking water.

Use of Reverse Osmosis Membranes to Remove Perfluorooctane Sulfonate (PFOS) from Semiconductor Wastewater†

2006 ◽  
Vol 40 (23) ◽  
pp. 7343-7349 ◽  
Author(s):  
Chuyang Y. Tang ◽  
Q. Shiang Fu ◽  
A. P. Robertson ◽  
Craig S. Criddle ◽  
James O. Leckie
Keyword(s):  
Reverse Osmosis ◽  
Perfluorooctane Sulfonate ◽  
Reverse Osmosis Membranes
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