New chlorine-resistant polyamide reverse osmosis membrane with hollow fiber configuration

Konagaya, Shigeji; Nita, Kazuhide; Matsui, Youichi; Miyagi, Morio

doi:10.1002/1097-4628(20010118)79:3<517::aid-app150>3.0.co;2-j

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…Le Roux et al (2015) reported DBP occurrences in two RO desalination plants as well as one MSF plant. One RO plant was equipped with polyamide (PA) membranes that can offer high permeate flux and adequate salt rejection (Fujioka et al, 2012) and the other with cellulose triacetate (CTA) membranes that are chlorine-resistant (Konagaya et al, 2001). Very low level of THMs (0.36 mg/L) were detected in the 1st pass permeate of the former RO plant with no detectable level of HAA and HANs, while THM levels in the latter RO plant increased from the chlorinated intake (14.5e18.4 mg/L) to the 1st pass permeate (39e67 mg/L).…”

Section: Dbp Occurrences In Distillate and Ro Permeatementioning

confidence: 99%

Disinfection by-product formation during seawater desalination: A review

2015

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Due to increased freshwater demand across the globe, seawater desalination has become the technology of choice in augmenting water supplies in many parts of the world. The use of chemical disinfection is necessary in desalination plants for pre-treatment to control both biofouling as well as the post-disinfection of desalinated water. Although chlorine is the most commonly used disinfectant in desalination plants, its reaction with organic matter produces various disinfection by-products (DBPs) (e.g., trihalomethanes [THMs], haloacetic acids [HAAs], and haloacetonitriles [HANs]), and some DBPs are regulated in many countries due to their potential risks to public health. To reduce the formation of chlorinated DBPs, alternative oxidants (disinfectants) such as chloramines, chlorine dioxide, and ozone can be considered, but they also produce other types of DBPs. In addition, due to high levels of bromide and iodide concentrations in seawater, highly cytotoxic and genotoxic DBP species (i.e., brominated and iodinated DBPs) may form in distribution systems, especially when desalinated water is blended with other source waters having higher levels of organic matter. This article reviews the knowledge accumulated in the last few decades on DBP formation during seawater desalination, and summarizes in detail, the occurrence of DBPs in various thermal and membrane plants involving different desalination processes. The review also identifies the current challenges and future research needs for controlling DBP formation in seawater desalination plants and to reduce the potential toxicity of desalinated water.

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Section: Dbp Occurrences In Distillate and Ro Permeatementioning

confidence: 99%

Disinfection by-product formation during seawater desalination: A review

2015

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“…In comparison to CTA RO membranes, PA membranes usually have high permeability and can be operated in a much wider pH range [12]. Nevertheless, CTA RO membranes are chlorine-resistant and thus residual chlorine can be maintained at up to 1 mg/L in the RO feed [13]. In fact, the CTA RO filtration in combination with chlorination can suppress biological growth on RO membrane surfaces and prevent an increase in feed pressure caused by membrane fouling in seawater desalination applications [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane

et al. 2015

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Nghiem, L. D. (2015). Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane. Desalination, 368 69-75.Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane AbstractThe rejection behaviours of 41 trace organic chemicals (TrOCs) by a hollow fibre cellulose triacetate (CTA) reverse osmosis (RO) membrane for potable water reuse were evaluated. Results reported here suggest that the rejection behaviours of TrOCs by the CTA RO membrane are mostly similar to those previously reported for the polyamide (PA) RO membrane. However, in comparison to the PA based RO membrane, hydrophobic interaction plays a greater role while electrostatic interaction is less significant in governing the rejection of TrOCs by the CTA RO membrane. No difference in rejection between positively and negatively charged compounds by the CTA RO membrane could be observed. The rejection of neutral TrOCs by the CTA RO membrane varied significantly from 25% to over 95%. Molecular size (i.e. minimum projection area) was found to be an important factor governing the rejection of neutral TrOCs. Further investigation using Nnitrosamines reveals that in addition to molecular size, hydrophobicity could significantly influence their rejection by the CTA RO membrane, while N-nitrosamine rejection by the PA RO membrane was mostly governed by molecular size. In contrast to the neutral TrOCs, most charged TrOCs selected in this investigation exhibited over 90% rejection, regardless of molecular size.

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Electrospun Nanofibrous Membranes for Desalination

Hsiao

2019

Current Trends and Future Developments on (Bio-) Membranes

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New chlorine-resistant polyamide reverse osmosis membrane with hollow fiber configuration

Cited by 10 publications

References 18 publications

Disinfection by-product formation during seawater desalination: A review

Disinfection by-product formation during seawater desalination: A review

Rejection of trace organic chemicals by a hollow fibre cellulose triacetate reverse osmosis membrane

Electrospun Nanofibrous Membranes for Desalination

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