A Comparative Study of Light and Heavy Elements Cations in Wastewater in Herat City, Afghanistan


Ahmad Timory
Faridah Ashah
Shahnaz Timory


‌‌Background: Proper management of wastewater is crucial for the environment. Without knowing the operational status of the treatment system, it is impossible to make an accurate assessment of the system. In this study, the performance of the activated sludge system at the Al-Farooq 207 Qul Urdu (Site A) and Family Center (Site B) wastewater treatment plants was evaluated for the removal of element cations.
Materials and Methods: The research method involved random sampling of sewage. For this purpose, 5 samples were taken from the 2, 3, and 5 meter parts of the distance of 15 samples.
Findings: The concentration of the elements in these wastewaters has been measured and then the results have been analyzed by statistical analysis. After the graphs that were examined and analyzed in the sewage of (Site A) and (Site B) in Herat Province, according to the WHO international standard for these cations of toxic elements such as: FeII 0.5gr/lit, AlIII 0.2gr/lit, CrII 0. 05gr/lit, CoII 0.023gr/lit, ZnII 3gr/lit, MnII 0.5gr/lit, NiII 0.02gr/lit, CuII 2gr/lit, CdII 0.03gr/lit, BiII 1gr/lit, AsII 0.01gr/lit, SbII 0.005gr /lit, HgII 0.001fr/lit, has determined. The results in the presented graphs are compared with the WHO international range.
Conclusion: The results show that the concentration of toxic cations of heavy elements in the wastewater of (Site A) is very high, except for the remaining (CuII) cation from the WHO international range. and its use in the fields of agriculture, environment and their flow in surface waters is very worrying. While the concentration of toxic cations of heavy elements in the sewage of (Site B), Herat province, except for the cations of (ZnII), (MnII), (CuII), (CdII), is lower than the WHO international range, the concentration of cations (Fe), (AlIII), (Cr++), (CoII), (NiII), (BiII), (AsII), (SbII) are relatively high from the WHO international range. And its use in agriculture, the environment and its flow on surface and underground water are worrying. Because this wastewater is used to irrigate fields in Behdaei village of Gozereh district without chemical treatment.


Al-Farooq 207 Qul Urdu (Site A), Family Center (Site B), light metals, heavy metals, WHO


How to Cite
Timory, A., Ashah, F., & Timory, S. (2023). A Comparative Study of Light and Heavy Elements Cations in Wastewater in Herat City, Afghanistan. NUIJB, 2(04), 22–30. Retrieved from https://nuijb.nu.edu.af/index.php/nuijb/article/view/111


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