Yimer et al. BMC Chemistry(2024) 18:114
https://doi.org/10.1186/s13065-024-01216-0

BMC Chemistry

CO R R E C T I O NOpen AccessCorrection to: Adsorptive removal of heavy
metals from wastewater using Cobaltdiphenylamine (Co-DPA) complex
Mesfin Yimer1, Shagufi Naz Ansari2, Biniyam Abdu Berehe1, Krishna Kanthi Gudimella3, Gangaraju Gedda4,5*,
Wubshet Mekonnen Girma1*, Nazim Hasan6 and Shadma Tasneem6
Correction to: BMC Chemistry (2024) 18:23
https://doi.org/10.1186/s13065-024-01128-z
Following publication of the original article [1], theauthors noticed Co-DPA mislabeled as Cu-DPA in “Keywords” and “Recovery studies” section. Although theerror was present, these corrections do not affect theinterpretation and conclusions of the original article as awhole. The authors apologize for any inconvenience thismay have caused the readers.
Keywords
Wastewater, Adsorption, Co-DPA, Real sample, Freundlich isotherm

The online version of the original article can be found at https://doi.
org/10.1186/s13065-024-01128-z.
*Correspondence:
Gangaraju Gedda
raju.analy@gmail.com
Wubshet Mekonnen Girma
wubshet.mekonnen@wu.edu.et1
Department of Chemistry, College of Natural Science, Wollo University,P.O. Box:1145, Dessie, Ethiopia
2
Department of Chemistry, School of Engineering, Presidency University,Bangalore, Karnataka 560064, India
3
Department of Chemistry, School of Science, GITAM (Deemed to Be
University), Rudraram, Telangana 502329, India
4
Central Research Laboratory, K S Hegde MedicalAcademy, NITTE(Deemed to Be University), Deralakatte, Mangaluru, Karnataka
575018, India
5
Department of Animal Science & Technology and BET Research Institute,Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
6
Department of Chemistry, College of Science, Jazan University, P.O. Box114, Jazan 45142, Kingdom of Saudi Arabia

Recovery studies.
Reusing the adsorbent by regenerating its adsorption characteristics is an economic necessity in many applications.
With growing raw material and wastewater treatment
process expenses, the allure of product recovery technologies has grown dramatically [74, 77]. The Co-DPA adsorbent was evaluated for its reusability. The recycling results
shown in Fig. 7 show that it maintains its activity despite adecline in metal ion removal efficiency, and it is pH dependent and performed by adding HCl and NaOH to solution.
In a typical experiment, 0.01 M HNO3 or HCl and0.005 M NaOH eluents were added to the solution toperform the recycling test. Metals were initially adsorbed
on Co-DPA from 60 mL solutions containing 80 mg/L
metal ions at pH 3 (Cr) and 7 (Cd &Pb). The Co-DPA
were then stripped with 30 mL eluent while agitating at25 °C for 30 min. The Co-DPA complex was separated,
and the metal ion concentration in the supernatant wasdetermined. The adsorption–desorption cycles weredone three times for each measurement.

References
1. M. Yimer, S.N. Ansari, B.A. Berehe, K.K. Gudimella, G. Gedda, W.M. Girma, N.
Hasan, S. Tasneem, BMC chemistry, 18 (2024) 1–15.

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