Water quality assessment of Qarun Lake and heavy metals decontamination from its drains using nanocomposites

4th International Conference on Advanced Sciences

工业技术;自然科学

Goher, M.E.^1 ; El-Rouby, W.M.A.^2 ; El-Dek, S.I.^2 ; El-Sayed, S.M.^1 ; Noaemy, S.G.^1,2

Chemistry Lab., Fresh Water and Lakes Division, NIOF, National Institute of Oceanography and Fisheries, Egypt^1

Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, (PSAS), Beni-Suef University, Beni-Suef, Egypt^2

关键词: Agricultural wastewater;    Chitosan alginates;    Heavy metal removal;    Metal pollution;    Pollution index;    Removal efficiencies;    Water quality assessments;    Water quality indexes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/464/1/012003/pdf
DOI  :  10.1088/1757-899X/464/1/012003

来源: IOP

【 摘 要 】

Qarun Lake is one of the most important lakes in Egypt; it is the shrunken remnant of Moeris Lake. It is a closed ecosystem represented as a tank for discharged agricultural wastewater of El-Fayoum province. To assess the quality of the lake water for fishing and aquatic live utilization, Oregon water quality and metal pollution indices are computed. Based on the obtained results, water of the Qarun Lake is classified as very poor for the fishing utilization, where water quality index changed from 17.05 to 67.4 at the different stations. The metal indices; Pollution index (PI) and metal index (MI); showed that Qarun Lake water undergoes from a several grade of contamination for usage of aquatic life because of the enormous amount of wastes that discharging into the lake. Novel synthesized alginate nanocomposites (alginate, chitosan-alginate, and LDH-alginate and LDH-chitosan-alginate beads) were applied to remove heavy metal such as (Cd2+, Cu2+, Cr6+, Mn2+, Fe2+, Ni2+, Pb2+, and Zn2+) from different wastewater discharging into Qarun Lake. LDH-chitosan-alginate beads the exhibited the maximum removal efficiency that varied between 92.253 and 98.833 % for Cr6+ and Fe2+, respectively; in contrast, the alginate beads recorded the lowest one. The study indicated that the nanocomposite adsorbents, especially, LDH-chitosan-alginate beads are an effective substance for metal removal from different wastewater.