Sains Malaysiana 49(12)(2020): 2977-2988

http://dx.doi.org/10.17576/jsm-2020-4912-09

Adsorption of Dye on Carbon Microparticles: Physicochemical Properties during Adsorption, Adsorption Isotherm and Education for Students with Special Needs

(Penjerapan Pewarna pada Mikrozarah Karbon: Sifat Fizikokimia semasa Penjerapan, Isoterma Penjerapan dan Pendidikan untuk Pelajar Berkeperluan Khas)

RINA MARYANTI¹, ASEP BAYU DANI NANDIYANTO²*, TRYASTUTI IRAWATI BELLINY MANULLANG¹, ACHMAD HUFAD¹ & SUNARDI¹

¹Departemen Pendidikan Khusus, Universitas Pendidikan Indonesia, Bandung, Indonesia

²Departemen Kimia, Universitas Pendidikan Indonesia, Bandung, Indonesia

Received: 8 August 2020/Accepted: 21 August 2020

ABSTRACT

The purpose of this study was to demonstrate the adsorption of dye on carbon microparticles. We conducted two experiments: Understanding of the adsorption of dye on carbon microparticles. We used turmeric solution as a model of dye, in which this solution was contacted into commercially available carbon microparticles in the batch-typed adsorption reactor. The measurement results were then compared to several adsorption isotherm models, such as Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models; and finding teaching strategies to improve students’ understanding on the adsorption concept to students with special needs. As for the second part which is finding strategies to teach the obtained results and their concept of adsorption to students with special needs, we evaluated the strategies to eight students with intellectual disabilities in special schools in Kuningan District, Indonesia using a Single Subject Research method (equipped with pre-test, post-test, and experimental demonstration). The results showed that carbon can absorb dye and can be used as an alternative for wastewater treatment. The isotherm models have the linearity parameter R² of above 50%, and the most suitable model is Freundlich. The models also confirmed favorable adsorption with multilayer structure and physical interaction between turmeric and carbon microparticles. Demonstrating experiments and informing the measurement results gave great impacts on students’ comprehension, in which they have better understanding about the concept of adsorption compared to the conventional teaching method.  

Keywords: Adsorption isotherm; adsorption of carbon; education; students with special needs; teaching

ABSTRACT

Tujuan kajian ini adalah untuk menunjukkan penjerapan pewarna pada mikrozarah karbon. Dua uji kaji telah dijalankan: Memahami penjerapan pewarna pada mikrozarah karbon. Larutan kunyit digunakan sebagai model pewarna dan larutan ini dihubungkan ke mikrozarah karbon yang tersedia secara komersial dalam reaktor penjerapan jenis batch. Hasil pengukuran kemudian dibandingkan dengan beberapa model isoterma penjerapan, seperti model Langmuir, Freundlich, Temkin dan Dubinin-Radushkevich; dan mencari strategi pengajaran untuk meningkatkan pemahaman pelajar mengenai konsep penjerapan kepada pelajar berkeperluan khas. Bagi bahagian kedua iaitu mencari strategi untuk mengajarkan hasil yang diperoleh dan konsep penjerapan mereka kepada pelajar berkeperluan khas, kami menilai strategi tersebut kepada lapan orang pelajar kurang upaya intelektual di sekolah khas di Kabupaten Kuningan, Indonesia menggunakan kaedah Penyelidikan Subjek Tunggal (dilengkapi dengan ujian pra, ujian pasca dan demonstrasi uji kaji). Hasil kajian menunjukkan bahawa karbon dapat menyerap pewarna dan dapat digunakan sebagai alternatif untuk rawatan air sisa. Model isoterma mempunyai parameter kelinearan R² lebih 50% dan model yang paling sesuai ialah Freundlich. Model itu juga mengesahkan penjerapan yang baik dengan struktur pelbagai lapisan dan interaksi fizikal antara mikrozarah kunyit dan karbon. Uji kaji menunjukkan dan pemberitahuan hasil pengukuran memberi impak yang besar terhadap pemahaman pelajar kerana mereka mempunyai pemahaman yang lebih baik mengenai konsep penjerapan berbanding kaedah pengajaran konvensional.

Kata kunci: Isoterma penjerapan; pelajar berkeperluan khusus; pendidikan; pengajaran; penjerapan karbon

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*Corresponding author; email: nandiyanto@upi.edu