Adsorptive removal of Arsenic (III) from magnetic biochar fabricated from agricultural waste biomass

Naincy Sahu* and Siddharth Shukla

Department of Environmental Science, Dr. Rammanohar Lohia Avadh University, Ayodhya-224001, Uttar Pradesh, India

ARTICLE INFOR: Received: 17 November 2022; Revised: 02 December 2022; Accepted: 03 December 2022

CORRESPONDING AUTHOR: E-mail: (N. Sahu), Tel: +91-7786922530

J. Appl. Sci. Innov. Technol. 1 (2), 52-55 (2022)


  • Agriculture waste was used in the synthesis of Biochar (mBC-400)
  • As(III) removal was examined using batch experiments.
  • mBC-400 effectively removed ∼74% of As(III) from aqueous solutions.


Large number of agricultural wastes like vegetable peel, saw dust, bagasse, rise husk, shells, rotten and scraped portions of food is generated from the agriculture fields, vegetable markets, households and its management are very essential to avoid its open dumping. Adsorbent preparation can be a new way to utilize agricultural waste. Hence in the present study, agricultural waste was used for the preparation of magnetic biochar at 400˚C temperature. The synthesized biosorbent is denoted as mBC-400 and its utilization for the biosorption of As(III). Characterized the prepared biosorbent by using scanning electron microscopy (SEM-EDX) and point zero charge (pHzpc). SEM of mBC-400 revealed that shapes of particles were irregular and shows huge number of pores on the adsorbent surface. EDX analysis indicates the higher carbon content in mBC-400.  The pHZPC of the mBC-400 was found to be 3.04. The batch study was conducted with various initial concentrations, adsorbent dosages and pH values. Adsorbent mBC-400 was efficient for the biosorption of As(III). The maximal percentage removal of As(III) was found to be ∼74% at 0.5 mg/L initial concentration. This study is focused on utilization of agricultural waste for purification of drinking water, wherever by using this solid waste feedstock for preparing the biosorbent it will reduce the agricultural waste problem and protect our environment. The prepared biosorbents were applied successfully to remediate the pollution problem.

 Keywords: Agricultural waste; magnetic biochar; As(III); biosorption

Scope: Environmental Engineering

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