摘要：Heavy metal pollution caused by industrial activities and technological development is posing significant threats to the environment and public health because of its toxicity, non-biodegradability, bioaccumulation and persistent tendency through food chain. Nickel is a non-biodegradable toxic heavy metal ion present in wastewater. In this study, removal of Nickel from aqueous solutions has been described. Fly ash as an adsorbent has been collected from Shree Ram Fertilizers and Chemicals, Kota (SRFC). Batch adsorption experiments were carried out to study the various parameters such as effect of initial metal ion concentration, effect of adsorbent dose, effect of pH. The Langmuir, Freundlich and Temkin isotherms were used to describe the adsorption equilibrium studies on different temperatures ranging from 30°C to 50°C for both samples. On the basis of coefficient of determination (R2) and standard error of estimation (σ), Langmuir isotherm best fits for both fly ash samples. The effect of temperature and calculation of ΔGo, ΔHo, ΔSo for the adsorption of Nickel (II) was also investigated.
