Open AccessInvestigation on the use of aluminium rich sandy soil as natural adsorbent in the removal of lead from water
Author(s) -
Yee Sern Ng,
Yiying Tan,
Ker-Sin Heng,
Ying Hui Ong
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1195/1/012003
Subject(s) - adsorption , chemisorption , aluminium , chemistry , monolayer , langmuir adsorption model , langmuir , environmental chemistry , environmental engineering , environmental science , organic chemistry , biochemistry
The feasibility of aluminium rich sandy soil collected from Jeram as natural adsorbent in removing lead (Pb) from water was investigated without any surface modification. The investigation on the effect of initial concentration, solution pH, and soil:solution ratio was carried out using response surface methodology. The adsorption efficiency was increased at higher pH and soil:solution ratio, as well as lower initial concentration, as a result of higher availability of adsorption sites and less adsorbate competition. The adsorption followed Langmuir isotherm and monolayer chemisorption with an adsorption capacity of 10.64 mg g −1 . The process followed pseudo-second order kinetic model, with a rate constant of 0.011 g mg −1 min −1 at optimum adsorption pH of 4-5.