The Study of Blocking Agent on Lengkeng (Euphoria Logan Lour) Fruit Shell and Seed for Adsorption of Pb (II) from Aqueous Solution

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Kurniawati, D.^1 ; Zein, R.^2 ; Chaidir, Z.^2 ; Aziz, H.^2

Chemistry Dept., FMIPA Universitas Negeri Padang, Indonesia^1

Chemistry Dept., FMIPA Universitas Andalas Padang, Indonesia^2

关键词: Adsorbent dose;    Adsorption capacities;    Adsorption of pb;    Biosorbents;    Blocking agents;    COOH group;    Initial concentration;    Optimum conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012032/pdf
DOI  :  10.1088/1757-899X/335/1/012032

来源: IOP

【 摘 要 】

The study focuses on the roles played by mayor functional groups(carboxyl) in the lengkeng shell for sorption of Pb (II). The biosorbent was characterized by FTIR and elemental analyses. The parameters such as pH, initial concentration, particle sizes, adsorbent dose and flow rate were also studied. The results showed that the optimum condition was at pH = 3, concentration 400 mg/l, 250 μm particle sizes, adsorbent dose 0,5 g and 2 ml/min flow rate with adsorption capacity 4,8933 mg/g(shell) and 5,2720 mg/g(seed). It is show that ion exchange play as a more important role in the sorption of Pb (II) on lengkeng shell and seed. Blocking of COOH groups by chemical esterification resulted in Pb important reduction in metal binding.The result showed that adsorption capacity of lengkeng shell uncreases until 63.67 % and lengkeng seed uncreases 98.70%.