Adsorption of Ni(II) onto Chemically Modified Spent Grated Coconut (Cocos Nucifera)

2nd International Conference on Materials Engineering and Nanotechnology

材料科学;物理学

Hamzah, F.I.^1 ; Khalid, K.^2 ; Hanafiah, M.A.K.M.^2

Faculty of Bioresource and Food Industry, Universiti Sultan Zainal Abidin, Besut, Terengganu

22000, Malaysia^1

Faculty of Applied Sciences, Universiti Teknologi MARA, Cawangan Pahang, Bandar Tun Razak Jengka, Pahang

26400, Malaysia^2

关键词: Adsorption capacities;    Adsorption process;    Chemically modified;    Contaminated wastewater;    Homogeneous surfaces;    Langmuir isotherm models;    Monolayer adsorption;    Pseudo-second-order kinetic models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/205/1/012009/pdf
DOI  :  10.1088/1757-899X/205/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A new adsorbent of plant waste origin from coconut processing food factory was explored for removing Ni(II) from aqueous solutions. Several parameters such as pH, dosage, concentration and contact time were studied to obtain optimum conditions for treatment of Ni(II) contaminated wastewater. Spent grated coconut (Cocos nucifera) treated with sulfuric acid (SSGC) showed good adsorption capacity for Ni(II) ion. The amount adsorbed was affected by solution pH with the highest value achieved at pH 5. Other optimum conditions found were; dosage of 0.02 g, and 60 min of equilibrium time. Ni(II) adsorption obeyed the pseudo-second order kinetic model which suggested that chemisorption mechanism occurred in the adsorption process. The equilibrium data presented a better fitting to the Langmuir isotherm model, an indication that monolayer adsorption occurred onto a homogeneous surface. The maximum adsorption capacity, qmaxwas 97.09 mg g-1, thus SSGC can be classified as good and comparable with other plant waste adsorbents.