B. Hamrouni

Performance of Reverse Osmosis and Nanofiltration in the Removal of Fluoride from Model Water and Metal Packaging Industrial Effluent

Fluoride forms a common aqueous effluent in many chemical industries. Excess of fluoride in the effluent can cause a health hazard. So, effluent containing fluoride needs treatment to reduce its concentration to a disposable value before discharging into public sewage. Removal of fluoride ion from model water solutions was investigated using polyamide thin film composite reverse osmosis and nanofiltration membranes. The effects of feed pressure, concentration, ionic strength, nature of cation associated to fluoride, and pH on the retention of fluoride ions were studied. Membranes were used to reduce fluoride ions and total salinity of a metal packaging industrial effluent. The retention of fluoride exceeds 90% for both membranes. This was found to depend on feed concentration, ionic strength, pH, and applied pressure. The Spiegler-Kedem model was applied to experimental results to determine phenomenological parameters σ and Ps, the reflection coefficient of the membrane and the solute permeability coefficient of ions. The convective and diffusive parts of the mass transfer were quantified with predominance of the diffusive contribution.

Removal of Cd(II) ions from aqueous solution and industrial effluent using reverse osmosis and nanofiltration membranes.

Industrial effluents loaded with cadmium have contributed to the pollution of the environment and health troubles for humans. Therefore, these effluents need treatment to reduce cadmium concentration before releasing them to public sewage. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) processes, which can contribute to the removal of cadmium ions from model water and wastewater from the battery industry. For this reason, two RO and two nanofiltration membranes have been used. The effects of feed pressure, concentration, ionic strength, nature of anion associated with cadmium and pH on the retention of Cd(II) were studied with model solutions. Thereafter, NF and RO membranes were used to reduce cadmium ions and total salinity of battery industry effluent. Among these membranes, there are only three which eliminate more than 95% of cadmium. This was found to depend on operating conditions. It is worth noting that the Spiegler-Kedem model was applied to fit the experimental results.

Study of the influence of operating parameters on boron removal by a reverse osmosis membrane

AbstractBoron is a vital element for organism growth but excess of boron in water causes a problem due to its adverse effects on plants and humans. Hence, it is advisable to keep boron under specified harmless limits. However, removing boron from water is challenging. Also, it is not easily removed by a reverse osmosis membrane under natural conditions. In this paper, boron removal from aqueous solutions by the use of reverse osmosis membrane was investigated. The first objective of this work was to evaluate the characteristics of the AG-2514-TF (Osmonics) membrane used in boron permeation experiments. The next objective was to study the retention of boron by the AG membrane. The effect of several working parameters, such as pH, operating pressure, feed concentration, temperature, ionic strength, and other ions was studied in an attempt to achieve a higher removal capacity. The experimental results indicated that boron removal was dependent on the operating parameters. Indeed, boron can be effectively rem...

Erratum to: Selectivity of anion exchange membrane modified with polyethyleneimine

The authors acknowledge and apologize for neglecting to mention the references to certain paragraphs of the introduction section of their article. The first paragraph of Introduction section starts by: “Amara and Kerdjoudj [Amara M, Kerdjoudj H (2003) Desalination 155:79–87] announced that according...”. For the same paragraph, please, insert, after In recent years: “Sivaraman et al. [Sivaraman P, Chavan JG, Thakur AP, Hande VR, Samui AB (2007) Electrochimica Acta 52:5046–5052] noted that considerable...” For the second following paragraph, please insert, before Previous works by Sata et al.: “Amara and Kerdjoudj [Amara M, Kerdjoudj H (2003) Desalination 155:79–87] indicated that previous works...” The fourth paragraph starts with: “Berbar et al. [Berbar Y, Amara M, Kerdjoudj H (2008) Desalination 223:238–242] indicated that many studies...”. The fifth paragraph starts with: “Amara and Kerdjoudj [Amara M, Kerdjoudj H (2007) Desalination 206:205– 209] found that among many studies...”.