Bayaumy B. Mostafa

Bio: Bayaumy B. Mostafa is an academic researcher from Theodor Bilharz Research Institute. The author has contributed to research in topics: Biomphalaria alexandrina & Adsorption. The author has an hindex of 6, co-authored 13 publications receiving 265 citations.

Removal of Pb, Cd, Cu and Ni from aqueous solution using nano scale zero valent iron particles

Abstract: Nanoparticles offer the potential to improve environmental treatment technologies due to their unique properties. Adsorption of metal ions Pb(II), Cd(II), Cu(II), Ni(II) to nano zero valent iron (nZVI) particles of surface iron oxide was examined. nZVI particles were synthesized by reduction of ferric chloride with sodium borohydride. In this work, transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy are applied to study the compositional and structural of nZVI. Batch equilibrium experiments were performed to study the removal efficiency of heavy metal ions. The effect of different parameters such as contact time, initial concentration, pH and nZVI dose on the adsorption process were investigated. The adsorption kinetics well fitted using a pseudo-second order kinetic model. SEM and TEM images showed that of particles were mostly spherical shape in chains with an average size 43.1 ± 11.9 nm. The initial sorption rate for all the metals is in order Pb 2+ > Cu 2+ > Cd 2+ > Ni 2+ . Short adsorption equilibrium contact time favors the application of the adsorption process. The formation of FeOOH on the surface of nZVI could be the main factor of cations removal due to its high adsorption affinity for aqueous solutes. Therefore, with the strong adsorption at pH 6.5 which is representative of several natural groundwater and the ability to adsorb multiple metal ions simultaneously, nZVI may offer a potential remediation method for the removal of metals from water and environment.

Removal of toxic metal ions from wastewater using ZnO@Chitosan core-shell nanocomposite

Abstract: Presently, there is increased attention and focus on heavy metals due to their adverse health effects. The purpose of this work was to fabricate ZnO@Chitosan core/organically shell nanocomposite (ZOCS) to remove Pb(II), Cd(II) and Cu(II) ions from polluted water. The results of adsorbent characterization by TEM, FE-SEM, EDX and FTIR revealed the formation of round shape particles with average size 58 nm. The optimum removal efficacy for Cu(II), Pb(II) and Cd(II) was recorded at pH 4, 6 and 6.5, respectively. According to Langmuir isotherm model, the metal ions adsorption capacity were 476.1, 135.1 and 117.6 mg/g, for Pb(II),Cd(II) and Cu(II) respectively. Continuous adsorption-desorption cyclic results demonstrated that ZOCS NC can be reused after recovery of ions by disodium salt of EDTA solution, and the renovated ZOCS can be used many times without significant efficiency loss satisfied the increasing need for the purification of water resources.

Bioactivity of Anagallis arvensis and Calendula micrantha plants, treated with ammonium nitrate, superphosphate and potassium sulphate fertilizers, on Biomphalaria alexandrina.

Abstract: The survival rate of B. alexandrina snails maintained in aqueous solutions of the two tested plants (Calendula micrantha and Anagallis arvensis) decreased gradually with time until the 9th week and 10th week where the survival rate was zero in the high concentration of A. arvensis and C. micrantha, respectively, meanwhile, the survival rate of the control was 20%. Also, the two plants caused reduction in hatchability of snails egg masses. Thus, the percent of hatching in A. arvensis (82 ppm) was 46% and in C. micrantha was 72% compared with control (97.29%). Both plants reduced the infection rate of Biomphalaria alexandrina snails with Schistosoma mansoni miracidia to 41.17% and 61.9%, respectively, compared with control (90%). C. micrantha caused much higher reduction in snail infection rate than A. arvensis. The prepatent period was significantly prolonged in snails maintained at higher concentration of both plants. The cercarial output (expressed as mean number/snail) revealed that, A. arevensis caused a significant reduction in cercarial production than control. While, high concentration (120 ppm) of C. micrantha caused a significant elevation in the mean number of cercariae/snail. However, the total number of cercariae produced by all snails in each group showed a reverse relation with the tested concentrations in both plants.

Biology of Freshwater Pollution.

Abstract: The pollution of rivers and lakes is of concern because of the threat to public water supplied and because of the damage caused to natural ecosystems. Waterborne diseases remain rife in the Third World, while in developed countries there has been a decline in the quality of water. It has also become apparent that pollutants may destroy ecosystems hundreds of miles from their source. Some of these toxic materials such as lead and PCBs also pose threats to public health. This text describes the sources of various types of pollutants, their effects on aquatic organisms, ecosystems and man, using case histories where appropriate. Ways of mitigating the effects of pollutants by control and ecosystem manipulation are described. Techniques for assessing the effects of pollution, both in field and laboratory, are introduced. The role of the biologist in pollution assessment and control and in the wider sphere of mangement of acquatic resources is also examined.

Chemistry, Structures, and Advanced Applications of Nanocomposites from Biorenewable Resources.

Abstract: Researchers have recently focused on the advancement of new materials from biorenewable and sustainable sources because of great concerns about the environment, waste accumulation and destruction, and the inevitable depletion of fossil resources. Biorenewable materials have been extensively used as a matrix or reinforcement in many applications. In the development of innovative methods and materials, composites offer important advantages because of their excellent properties such as ease of fabrication, higher mechanical properties, high thermal stability, and many more. Especially, nanocomposites (obtained by using biorenewable sources) have significant advantages when compared to conventional composites. Nanocomposites have been utilized in many applications including food, biomedical, electroanalysis, energy storage, wastewater treatment, automotive, etc. This comprehensive review provides chemistry, structures, advanced applications, and recent developments about nanocomposites obtained from biorenewable sources.

Nanomaterials for the Removal of Heavy Metals from Wastewater

Abstract: Removal of contaminants in wastewater, such as heavy metals, has become a severe problem in the world. Numerous technologies have been developed to deal with this problem. As an emerging technology, nanotechnology has been gaining increasing interest and many nanomaterials have been developed to remove heavy metals from polluted water, due to their excellent features resulting from the nanometer effect. In this work, novel nanomaterials, including carbon-based nanomaterials, zero-valent metal, metal-oxide based nanomaterials, and nanocomposites, and their applications for the removal of heavy metal ions from wastewater were systematically reviewed. Their efficiency, limitations, and advantages were compared and discussed. Furthermore, the promising perspective of nanomaterials in environmental applications was also discussed and potential directions for future work were suggested.

Lead toxicity: Health hazards, influence on food Chain, and sustainable remediation approaches

Abstract: Lead (Pb) toxicity has been a subject of interest for environmental scientists due to its toxic effect on plants, animals, and humans. An increase in several Pb related industrial activities and use of Pb containing products such as agrochemicals, oil and paint, mining, etc. can lead to Pb contamination in the environment and thereby, can enter the food chain. Being one of the most toxic heavy metals, Pb ingestion via the food chain has proven to be a potential health hazard for plants and humans. The current review aims to summarize the research updates on Pb toxicity and its effects on plants, soil, and human health. Relevant literature from the past 20 years encompassing comprehensive details on Pb toxicity has been considered with key issues such as i) Pb bioavailability in soil, ii) Pb biomagnification, and iii) Pb- remediation, which has been addressed in detail through physical, chemical, and biological lenses. In the review, among different Pb-remediation approaches, we have highlighted certain advanced approaches such as microbial assisted phytoremediation which could possibly minimize the Pb load from the resources in a sustainable manner and would be a viable option to ensure a safe food production system.

Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review

Abstract: This review presents a holistic analysis of the synthesis and efficacy of nanosorbents towards the waste water purification by the removal of selected heavy metal ions, with special emphasis on the effect of functionalization of nanoadsorbents on certain key properties such as surface area, separation and adsorption capacity. We have compiled enormous data based on the characteristic properties of nanomaterials and their selective affinity towards certain heavy metal ions. The experimental factors like pH, adsorbent dosage, contact time, temperature, initial ion concentration and ionic strength affecting metal ion removal have also been explored. Besides, the different adsorption kinetics and adsorption isotherm models are discussed with the help of various illustrations to have an insight into the adsorption procedure.