Zeta potential of commercial RO membranes: influence of source water type and chemistry

Deshmukh, Shivaji; Childress, Amy E.

doi:10.1016/s0011-9164(01)00357-5

Cited by 88 publications

(36 citation statements)

References 22 publications

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“…dichloroprop, metsulfuron-methyl and penicillin V) examined here. The active skin layer of typical LPRO membranes is negatively changed [18,19]. In fact, two of the LPRO membranes used in this study (ESPA2 and TFC-HR) have a negative charge (−11 and −23 mV, respectively) at the test solution pH (i.e.…”

Section: Effects Of Physicochemical Properties Of Trocs and Membranesmentioning

confidence: 94%

Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system

et al. 2015

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Nghiem, L. D. (2015). Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system. Desalination, Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system Abstract A protocol to validate the rejection of organic chemicals of potential health risk by low pressure reverse osmosis (LPRO) membranes was developed for decision making support regarding the monitoring level required for potable water reuse. Ten organic chemicals were selected for evaluation, based on their recorded usage, the scarcity of rejection data, and difficulty in analytical determination at concentrations relevant to their potential impact on human-health. An analytical method was developed for these organic chemicals. The target rejections of 90 and 99% for neutral and charged chemicals respectively were successfully achieved under the standard operating condition with only two exceptions (i.e. bisoprolol and carazolol rejections by the TFC-HR membrane). These lower rejections by the TFC-HR can be attributed to its highestwater permeability amongst the three membranes while both bisoprolol and carazolol are positively charged. Changes in operating conditions including permeate flux, feed temperature and chemical cleaning can exert a considerable impact on conductivity rejection by the three LPRO membranes investigated here. Feed temperature showed an apparent impact on the rejection of the selected organic chemicals. However, their rejections were still higher than the target validation values. The protocol developed here can be expanded for the validation of other organic chemicals.

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Section: Effects Of Physicochemical Properties Of Trocs and Membranesmentioning

confidence: 94%

Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system

et al. 2015

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show abstract

“…The membrane surface of RO, NF and UF membranes often carries a negative charge [52,53]. Negative charge on the membrane surface is usually caused by sulfonic and/or carboxylic acid groups in a skin membrane layer, which may be deprotonated in feed solution.…”

Section: Membrane Surface Chargementioning

confidence: 99%

A comprehensive review on surface modified polymer membranes for biofouling mitigation

2015

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“…This adsorption was shown to be amplified in the presence of calcium due to component interactions. Furthermore, Deshmukh and Childress (2001) concluded that the observed increase in zeta potential in the high pH range and decrease in zeta potential in the low pH range, for an RO membrane contacted with river water, was likely due to the presence of Ca 2+ and Mg 2+ hardness ions and negatively charged organic acids respectively.…”

Section: Introductionmentioning

confidence: 99%

The influence of dairy salts on nanofiltration membrane charge

Rice

Barber

O’Connor

et al. 2011

Journal of Food Engineering

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Zeta potential of commercial RO membranes: influence of source water type and chemistry

Cited by 88 publications

References 22 publications

Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system

Validating the rejection of trace organic chemicals by reverse osmosis membranes using a pilot-scale system

A comprehensive review on surface modified polymer membranes for biofouling mitigation

The influence of dairy salts on nanofiltration membrane charge

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