Nickel is considered as the essential nutrient for plants its deficiency is reared under field condition, but some reports of its deficiency is found in the Shikar block of Mirzapur district in Uttar Pradesh. So, in order understand the deficiency we need to know the factor affecting availability of Ni in the soil and for this a laboratory experiment of adsorption and desorption was done in which three factors were taken i.e. pH (2, 4, 6, 8, 10, 12), Calcium carbonate (CaCO3) (0.25, 0.5, 1.0, 1.5, 2.0g) and time (1 to 24 hours). The result indicated that as the time increased the adsorption of Ni increased in the soil and saturated around 24 hours and two kinetic models were taken pseudo second order and intra diffusion model. The model that fitted best was pseudo second order with coefficient of determination (R2= 0.944). Also different values of pH were taken and the result showed that as pH increased the adsorption increased but desorption of nickel decreased. The similar trend reported for the CaCO3, as the amount of CaCO3 increased from 0.25 to 2.0g the adsorption increased while desorption decreased. This study would help in understanding the factors that affect the adsorption and desorption of nickel in soil, especially under Ni deficient condition.

Adsorption, CaCO3, Intraparticle diffusion, pH, Pseudo second order

The study showed that the pH, CaCO3 and time has effect on the adsorption and desorption of nickel. As the pH increased or decreased in the soil system the availability of nickel is affected which is showed at different pH conditions, similarly with CaCO3 content? As the time has also influenced the adsorption of Ni as the time increased the adsorption of nickel increased with further saturation at longer interval. From this study sorption pattern of nickel can be clearly understood and the factors affecting it. This study would help us in understanding the factors that affect the nickel adsorption and how it can be used up by the plant.

Ayush Bahuguna, Satish Kumar Singh, Sachin Sharma, Munesh Kumar Shukla, Nidhi Luthra, Prem Kumar Bharteey, Sarvajeet, Arvind, and Astha Pandey and Pavan Singh (2022). Effect of Calcium Carbonate, pH and Time on the Adsorption and Desorption of Ni in Soils of Shikar Block of Mirzapur District of Uttar Pradesh. Biological Forum – An International Journal, 14(4a): 185-189.