scholarly journals Adsorption of Phosphonate Antiscalant HEDP from Reverse Osmosis Concentrates by La/FeOOH@PAC

2021 ◽  
pp. 512
Author(s):  
LI Chuang ◽  
YANG Qingfeng ◽  
LU Shengsen ◽  
LIU Yangqiao
Keyword(s):  
Reverse Osmosis ◽  
Reverse Osmosis Concentrates

Electrochemical Treatment of Reverse Osmosis Concentrates

2014 ◽  
pp. 644-651 ◽  
Author(s):  
Jelena Radjenovic ◽  
Arseto Bagastyo ◽  
Damien Batstone ◽  
Jurg Keller
Keyword(s):  
Reverse Osmosis ◽  
Electrochemical Treatment ◽  
Reverse Osmosis Concentrates

Size fractionation characterisation of removed organics in reverse osmosis concentrates by ferric chloride

2011 ◽  
Vol 63 (9) ◽  
pp. 1795-1800 ◽  
Author(s):  
A. Y. Bagastyo ◽  
J. Keller ◽  
D. J. Batstone
Keyword(s):  
Molecular Weight ◽  
Reverse Osmosis ◽  
Ferric Chloride ◽  
Membrane Separation ◽  
Fulvic Acids ◽  
Cell System ◽  
Humic And Fulvic Acids ◽  
Stirred Cell ◽  
Almost All ◽  
Reverse Osmosis Concentrates

Reverse osmosis membrane separation is the leading method for manufacturing potable purified water. It also produces a concentrate stream, namely reverse osmosis concentrates (ROC), with 10–20% of the water, and almost all other compounds. One method for further treating this stream is by coagulation with ferric chloride. This study evaluates removed organics in ROC treated with ferric chloride. Fractionation with ultrafiltration membranes allows separation of organics based on a nominal molecular weight. A stirred cell system was applied for serial fractionation to classify organic compounds into six groups of <0.5 kDa, 0.5–1 kDa, 1–3 kDa, 3–5 kDa, 5–10 kDa and >10 kDa. The study found that raw ROC is rich in low molecular weight compounds (<1 kDa) with almost 50% of the organics. These compounds include soluble microbial products (SMPs) and smaller humic and fulvic acids as indicated by fluorescence scanning. Conversely, colour was mostly contributed by medium to large molecules of humic and fulvic acids (>0.5 kDa). Organics and colour were reduced in all molecular groups at an optimum treatment dose 1.48 mM FeCl3 and a pH of 5. However, ferric seemed to effectively remove colour in all size ranges while residual nitrogen was found mostly in the <1 kDa sizes. Further, the fluorescence indicated that larger humic and fulvic acids were removed with considerable SMPs remaining in the <0.5 kDa.

Determination of cobalt in high-salinity reverse osmosis concentrates using flame atomic absorption spectrometry after cold-induced aggregation microextraction

2016 ◽  
Vol 8 (8) ◽  
pp. 1908-1913 ◽  
Author(s):  
Majid Baghdadi ◽  
Farzaneh Shemirani ◽  
Hamid Reza Lotfi Zadeh Zhad
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Reverse Osmosis ◽  
Flame Atomic Absorption Spectrometry ◽  
High Salinity ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Induced Aggregation ◽  
Reverse Osmosis Concentrates

Cold-induced aggregation microextraction (CIAME) is a robust procedure for high-salinity reverse osmosis concentrates.

Surface water discharge of reverse osmosis concentrates

Desalination ◽  
1990 ◽  
Vol 78 (1) ◽  
pp. 27-40 ◽  
Author(s):  
Patricia J. Malaxos ◽  
O.J. Morin
Keyword(s):  
Surface Water ◽  
Reverse Osmosis ◽  
Water Discharge ◽  
Reverse Osmosis Concentrates
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