Current World Environment

Application of Bentonite and Modified Bentonite as Green Adsorbent for Cadmium Removal from Aqueous Medium

Sachin Verma , Subhajit Sikdar , Ashok Kumar Jha ^* and Pallavi Kumari

¹ Department of Chemistry, Tilka Manjhi Bhagalpur University, Bhagalpur, Bihar India

Corresponding author Email: ashokjha39@gmail.com

DOI: http://dx.doi.org/10.12944/CWE.20.3.14

Abstract

Cadmium in aqueous medium is posing a serious threat to human health and ecosystem. Cd(II) enters the food chain and get biomagnified leading to adverse health effects. Cadmium contamination affects kidneys, bones and lungs due to its persistence and bioaccumulation.The present study deals with the removal of cadmium ion from aqueous medium using bentonite powder and bentonite modified with green saponins such as Sapindus mukorossi (reetha) and Aloe vera. The residual concentration was found to be 0.00753 ppm at a wavelength of 228.802 nm when 1g bentonite was treated with 100 mL 1 ppm solution up to 60 minutes. The maximum percent removal is 99.24. A comparative study for removal of Cd(II) showed that adsorption of modified bentonite with Aloe vera was higher than that of the modified bentonite with Sapindus mukorossi extract an unmodified bentonite. Bentonite was characterized by XRD, TGA and FTIR. Kinetic investigations were done using pseudo first order and second order kinetic models. The experimental findings revealed that bentonite modified with Sapindus mukorossi and Aloe vera could be utilized as an effective adsorbent of Cd(II) from aqueous medium.

Keywords

Aloe vera; Bentonite; Sapindus mukorossi; Saponins

Copy the following to cite this article:

Verma S, Sikdar S, Jha A. K, Kumari P. Application of Bentonite and Modified Bentonite as Green Adsorbent for Cadmium Removal from Aqueous Medium. Curr World Environ 2025;20(3). DOI:http://dx.doi.org/10.12944/CWE.20.3.14

Copy the following to cite this URL:

Verma S, Sikdar S, Jha A. K, Kumari P. Application of Bentonite and Modified Bentonite as Green Adsorbent for Cadmium Removal from Aqueous Medium. Curr World Environ 2025;20(3).

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