Removal of silica from brackish water by integrated adsorption/ultrafiltration process

Shemer, Hilla; Melki-Dabush, Nitzan; Semiat, Raphael

doi:10.1007/s11356-019-06363-9

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…This is a significant reason to extend the drinking water treatment process with a unit that allows the reduction of silica concentration to 150 mg/L, ensuring the solubility of silicates. One of the solutions tested is a hybrid continuous stirred tank reactor (CSTR) adsorption/ultrafiltration system using iron oxy/hydroxide as agglomerates and a hollow fiber UF membrane served as a barrier to the passage of the adsorbent, which has enabled the removal of silica from brackish groundwater in a relatively short residence time (15 min) [ 37 ]. The tests indicated that adsorption increased with increasing silica concentration from 25 to 70 mg/L and decreased with increasing concentration of agglomerates (limit 2.5 g/L).…”

Section: Removal Of Metalloidsmentioning

confidence: 99%

Recovery of Metals from Wastewater—State-of-the-Art Solutions with the Support of Membrane Technology

Staszak

Wieszczycka

2023

Membranes

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This paper discusses the most important research trends in the recovery of metals from industrial wastewater using membrane techniques in recent years. Particular attention is paid to the preparation of new membranes with the required filtration and separation properties. At the same time, possible future applications are highlighted. The aspects discussed are divided into metals in order to clearly and comprehensibly list the most optimal solutions depending on the composition of the wastewater and the possibility of recovering valuable components (metalloids, heavy metals, and platinum group metals). It is shown that it is possible to effectively remove metals from industrial wastewater by appropriate membrane preparation (up to ~100%), including the incorporation of functional groups, nanoparticles on the membrane surface. However, it is also worth noting the development of hybrid techniques, in which membrane techniques are one of the elements of an effective purification procedure.

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Section: Removal Of Metalloidsmentioning

confidence: 99%

Recovery of Metals from Wastewater—State-of-the-Art Solutions with the Support of Membrane Technology

Staszak

Wieszczycka

2023

Membranes

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“…In terms of silica, the main principle of removal by membrane techlogies is size exclusion . Colloidal silica can be removed by the UF process with a tight UF membrane (MWCO: ∼10,000 Da), while soluble reactive silica removal requires a RO process. ,, It is worthy to notice that when silica concentration is high, such as SAGD produced water, pretreatments may be needed to avoid silica fouling on the RO membranes. , …”

Section: Treatment Technologies For Removal Of Organics and Silicamentioning

confidence: 99%

Treatment Technologies for Organics and Silica Removal in Steam-Assisted Gravity Drainage Produced Water: A Comprehensive Review

How

Zeng

et al. 2022

Energy Fuels

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Produced water from steam-assisted gravity drainage (SAGD) operations is a complex mixture of inorganic and organic constituents. Silica, carbonate and bicarbonate, and hardness are three inorganic constituents of interest, whereas the organic contaminants are composed of free and emulsified oil (F&EO) and water-soluble organic (WSO) fractions. Although the current warm lime softening (WLS) and hot lime softening (HLS) in SAGD operations are able to remove particles, silica, and organics, improving the removal efficiency of organics and silica still faces technical and operational challenges given their complex chemistry in produced water. Much effort has been put toward developing effective and cost-efficient treatment processes to handle organics and silica. In this work, we have systematically reviewed the properties of silica and the characteristics of dissolved organics in SAGD produced water, as well as the working principle and removal mechanisms of several techniques, including membrane technology, adsorption, coagulation–flocculation, and hybrid processes. Different analytical techniques for characterizing dissolved organics have been assessed, and the dominant and representative organic species in produced water have been identified. The advantages and limitations, impact factors, application performance, and effectiveness of each technology have been discussed in terms of the removal efficiency for silica and organics. Some remaining challenges and perspectives for future research are also presented. This work provides an improved understanding of the characteristics of silica and organics in SAGD produced water, as well as different treatment technologies, with useful implications for developing effective, feasible, and cost-efficient treatment processes with the objective of enhancing the removal of silica and organics from produced water, thereby leading to economic and environmental performance improvements.

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“…In particular, Ultrafiltration has been used widely to remove dissolved macromolecules and finer impurities from wastewater in industrial applications. [2][3][4][5][6][7][8] Polymeric membranes are usually preferred for ultrafiltration applications owing to their simple fabrication techniques and ease of achieving pore size of a few nanometers in diameter. These membranes have found applications in various wastewater treatment, dairy industry, bio-separation, and drug purification, etc.…”

Section: Introductionmentioning

confidence: 99%

A novel temperature-responsive mixed matrix ultrafiltration membrane based on boron nitride nanomaterial

Srivastava

Raviya

Raval

2022

Journal of Thermoplastic Composite Materials

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A novel mixed matrix membrane was prepared by blending polysulfone with two-dimensional boron nitride followed by its hydroxyl functionalization. Prepared nanocomposite membranes were characterized for the surface morphology, surface roughness, zeta potential and hydrophilicity. Uniform dispersion of boron nitride nanoparticles in polysulfone matrix and consequent changes in membrane properties were confirmed by scanning electron microscope images, atomic force microscope images, zeta potential, contact angle analysis, and X-Ray photoelectron spectroscopy. Differential scanning calorimetry (DSC) technique was used to determine the glass transition temperature (Tg) of the modified membrane and the results revealed the presence of BN in the membrane matrix. The highest water flux of 329.52 Liters per sqm per hour (LMH) was obtained in case of PS/BN (1%) as compared to 151.87 LMH of virgin membrane and Albumin rejection also increased by nanocomposites membranes up to certain concentration of Boron nitride. A unique behavior of temperature responsiveness of nanocomposite membrane was observed, where a steep increment in permeate flux by 205% at higher temperature was noted as compared to the virgin Polysulfone membrane where only 103% increase was recorded for the same temperature range. Moreover, the water uptake capacity of nanocomposite membranes were measured to understand the changes with nanomaterial incorporation. The membrane showed a good promise for high-temperature separation applications.

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Removal of silica from brackish water by integrated adsorption/ultrafiltration process

Cited by 14 publications

References 34 publications

Recovery of Metals from Wastewater—State-of-the-Art Solutions with the Support of Membrane Technology

Recovery of Metals from Wastewater—State-of-the-Art Solutions with the Support of Membrane Technology

Treatment Technologies for Organics and Silica Removal in Steam-Assisted Gravity Drainage Produced Water: A Comprehensive Review

A novel temperature-responsive mixed matrix ultrafiltration membrane based on boron nitride nanomaterial

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