Evaluation of the most promising techniques overcoming the algal problems takes place during the purification of drinking water

Mahmoud, Eman A.; Mohamed, Atef Mohamed Gad; Farrag, Abd El Hay Ali; Aboeldahb, Shaimaa A. M.

doi:10.1007/s11356-021-13674-3

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…15). This is consistent with the general characteristics of the aluminosilicates group that does not dissolve in water at the normal temperature as mentioned by Habert et al (2014), Mahmoud et al, (2021).…”

Section: Residual Alum Limit Monitoringsupporting

confidence: 91%

New application to remediate drinkable groundwater from excess of hardness ions by using sodalite bearing modified illite

Mohamed

Ali

Farrag

et al. 2022

Environ Geochem Health

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Calcium Hardness (Ca. H) and total Hardness ions in drinkable groundwater cause great problems for the entire world especially, the population communities which are located far from surface water sources. The present study investigates the use of Sodalite Bearing Modified Illite (SBMI) as a sustainable and new technique to eliminate these ions from drinkable groundwater to compatible with the instruction of the World Health Organization. The methodology was achieved by using a new method to remove these ions’ excess calcium Hardness and total Hardness depending on two main processes; the adsorption as a first step and the coagulation-flocculation-sedimentation process as a second step. The results of this study were achieved through conducting three tasks; (1) Chemical analysis surveys for all the groundwater wells, to determine the areas which are more affected by these salts, and plot them on the location maps. (2) Conducting the alkaline modification of the Illite ore to obtain the (SBMI) which has a high surface area and high adsorption ability, and it had been characterized by using XRD, XRF, SEM, and FTIR techniques. (3) The experimental studies were conducted to evaluate the effect of the modified Illite on raw groundwater containing a high concentration of hardness ions, through the batch studies to determine the factors which affected its ability for removing these ions from groundwater. The present study illustrated that the removing efficiency for both total hardness (Ca. H + Mg. H) and calcium hardness (Ca. H) reached about 98%. Finally, the present study recommended using this technique, when there is a requirement for large quantities of treated water at a low cost.

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Section: Residual Alum Limit Monitoringsupporting

confidence: 91%

New application to remediate drinkable groundwater from excess of hardness ions by using sodalite bearing modified illite

Mohamed

Ali

Farrag

et al. 2022

Environ Geochem Health

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“…Causes highly poisonous and tends to concentrate in muscle and fatty tissues. Heavy metals can pass through the water stream, air, and soil for long distances, so it is too difficult to assess their impact on the environment [10]. Heavy metals can stand stable for many years without decomposition resulting in various risks [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthetization and characterization of SnCaAl2O3 nanocomposite and using as a superior adsorbent for Pb, Zn, and Cd ions in polluted water

et al. 2022

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The presence of heavy metals in drinking water or wastewater poses a serious threat to the ecosystem. Hence, the present study focused on synthesizing SnCaAl2O3 core-shell nanoparticles (C.N.P.s) in the α-Alumina phase by thermal annealing a stacked structure sandwiched between two Al2O3 layers at low temperatures. The obtained structure showed Sn N.P. floating gate with an Al2O3 dielectric stacked tunneling barrier to remove the excess of these heavy metals from polluted water. To characterize the prepared composites, X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM) were used. The synthesized SnCaAl2O3 C.N.P.s composite was examined to utilize it as an adsorbent for removing Zn, Cd, and Pb divalent cations. The removal efficiency was studied by various parameters such as adsorbent dose, pH, contact time, metal concentrations, temperature, and coexisting ions. The experimental results were tested via Langmuir and Freundlich isotherm models. The obtained results were convenient to the Freundlich isotherm model. Moreover, the adsorption thermodynamic behavior of Zn+2, Cd+2, and Pb+2 on the synthesized composite was examined, and the process is endothermic and spontaneous under experimental conditions. The results illustrated that the adsorption efficiency of the SnCaAl2O3 core-shell nanoparticles (C.N.P.s) ranged from 88% to about 100% for all cations.

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“…In addition, aluminum sulfate reduces the stabilization of algae through charge neutralization or algal aggregation, thereby improving flocculation and solid-liquid separation in a later stage [61]. It was observed that the ferric hydroxide colloid derived from Fe(VI) decomposition caused the conglomeration of algal cells during prolonged pre-oxidation and the damaged algal cells changed the zeta potential on their surface, while aluminum sulfate continually enhanced the subsequent coagulation by inducing the sedimentation of the remaining algal cells [62,63]. Moreover, the concentration of AOM in water samples decreased within a short contact time when using this combined technique for algal removal.…”

Section: Fe(vi) Combined With Aluminum Sulfate For Algal Removalmentioning

confidence: 99%

The Role of Ferrate (VI) in the Pretreatment of Algal Cells and Algal Organic Matters: A Review

Wang,

Yang,

Chen

et al. 2024

Water

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Algal blooms are caused by excessive levels of nitrogen, phosphorus, and other plant nutrients in water. Algae and algal organic matter (AOM) pose a great threat to the quality of drinking water. This manuscript offers a systematic review of algal removal by ferrate (Fe(VI)) oxidation, including the conditions for the removal of different algae by Fe(VI) and the factors affecting the removal efficiency. On this basis, the oxidation and coagulation mechanisms of algae removal by Fe(VI) are discussed. Then, the review introduces the process combining Fe(VI) pre-oxidation with aluminum sulfate action. The addition of aluminum sulfate can further enhance the coagulation effect and reduce the formation of disinfection byproducts (DBPs) in the subsequent chlorination process by effectively removing AOM, which is recognized as a precursor of DBPs. In addition, recent studies on the combined application of Fe(VI) and Fe(II) are also reviewed. In a reasonable dose range, the synergistic effect of Fe(VI) and Fe(II) can significantly improve the removal of algae and algal toxins. Finally, this review provides a comprehensive evaluation of the applicability of Fe(VI) in removing algal material, offers guidance for the harmless treatment of algae with Fe(VI), and identifies future research questions.

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Evaluation of the most promising techniques overcoming the algal problems takes place during the purification of drinking water

Cited by 8 publications

References 18 publications

New application to remediate drinkable groundwater from excess of hardness ions by using sodalite bearing modified illite

New application to remediate drinkable groundwater from excess of hardness ions by using sodalite bearing modified illite

Synthetization and characterization of SnCaAl2O3 nanocomposite and using as a superior adsorbent for Pb, Zn, and Cd ions in polluted water

The Role of Ferrate (VI) in the Pretreatment of Algal Cells and Algal Organic Matters: A Review

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