Malaysian Journal of Analytical Sciences Vol 23 No 6 (2019): 926 - 937

DOI: 10.17576/mjas-2019-2306-02

 

 

 

ADSORPTION STUDY ON THE REMOVAL OF COPPER IONS FROM AQUEOUS SOLUTION USING SODIUM HYDROXIDE-MODIFIED

Carica papaya PEELS

 

(Kajian Penjerapan Dalam Penyingkiran Ion Kuprum Dari Larutan Akueus Menggunakan Kulit Carica papaya Yang Dimodifikasikan Dengan Sodium Hidroksida)

 

Muhammad Shahrain Shuhaimen¹, Erna Normaya Abdulah,¹ Rosliza Mohd Salim², Mohd Armi Abu Samah², Muhammad Nor Omar³, Mohammad Norazmi Ahmad¹*

 

¹Experimental and Theoretical Research Laboratory, Department of Chemistry, Kulliyyah of Science

²Department of Chemistry, Kulliyyah of Science

³Department of Biotechnology, Kulliyyah of Science

International Islamic University of Malaysia, 25200 Kuantan, Pahang, Malaysia

 

*Corresponding author: mnorazmi85@gmail.com

 

 

Received: 1 August 2018; Accepted: 10 November 2019

 

 

Abstract

Recently, environment contamination by heavy metals has gained much attention due to the significant impact on public health. Heavy metals such as copper are non-biodegradable pollutants and they are very difficult to eliminate naturally from the environment. Therefore, this study was conducted to deal with the removal copper from an aqueous solution using a highly efficient, environmentally friendly adsorbent from Carica papaya peels (CPP) prepared by chemical treatment of NaOH modification. The effects of adsorbent mass, pH of the aqueous solution, and contact time were studied in batch experiments. The optimum parameters for the removal of copper (79%) are 0.9 g, pH = 3, and 45 minutes. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) were employed to validate the efficiencies of the adsorbents towards copper. FT-IR analysis showed that carboxyl and hydroxyl functional groups were involved in the adsorption of copper ions. As a conclusion, the chemical-treated CPP can be utilized as a potential biosorbent for copper removal from aqueous solutions.

 

Keywords:  Carica papaya peels, adsorbent, heavy metal

 

Abstrak

Sejak kebelakangan ini, pencemaran alam sekitar berpunca dari logam berat telah mendapat banyak perhatian berikutan kesannya yang signifikan terhadap kesihatan awam. Logam berat seperti kuprum adalah bahan pencemar tidak boleh diurai dan ianya sangat sukar untuk disingkirkan secara semula jadi dari alam sekitar. Oleh itu, kajian ini dijalankan untuk menangani penyingkiran tembaga daripada larutan akueus menggunakan penjerap yang berkesan dan mesra alam dari kulit Carica papaya (CPP) yang dihasilkan melalui pengolahan secara kimia menggunakan NaOH. Kesan jisim penjerap, pH larutan akueus, dan masa hubungan dikaji dalam eksperimen ini. Parameter optima keberkesanan penjerap untuk menyingkirkan kuprum (79%) adalah pada 0.9 g jisim penjerap, pH = 3, dan 45 minit masa pengeraman. Pengimbas mikroskop elektron (SEM) dan Fourier spektroskopi inframerah Fourier (FT-IR) digunakan untuk mengesahkan kecekapan penjerap untuk menjerap kuprum. Analisis FT-IR menunjukkan bahawa kumpulan berfungsi karboksil dan hidroksil adalah terlibat dalam penjerapan ion kuprum. Sebagai kesimpulan, CPP yang dirawat dengan kimia boleh digunakan sebagai penjerap yang berpotensi untuk penyingkiran kuprum daripada larutan akueus.

 

Kata kunci:  kulit Carica papaya, penjerap, dan logam berat

 

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