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

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.

Assessment of Mathematical Abilities of Students with Intellectual Disabilities During the COVID-19 Pandemic

“…Students C, D, and E had poor visual and auditory perception, concentration, and communication skills, but quite good motor skills. The intellectual barrier possessed by students with intellectual disabilities results in several problems in the developmental aspect (Maryanti, et al, 2020a).…”

“…The novelty in this research is the activity process stages involving teachers and parents, research subjects are children with intellectual disabilities, and the conditions of research activities carried out during the COVID-19 pandemic. The results of the assessment are needed as a basis and reference for making learning programs for students (Maryanti, et al, 2020a). The results of this study are expected to become a reference for educators in carrying out assessment activities during a pandemic.…”

Science Teaching Materials for Students with Special Needs: Concept of Exhaust Emissions in Transportation Equipment

“…This is because some students with special needs have poor skills in maintaining health protocols. Students with special needs are students who have problems in developmental and academic aspects [14]. This has an impact on the learning process, thus requiring special education and services.…”

“…Knowledge of this material makes students aware of the dangers and what to do to maintain health. Most students with special needs have limited knowledge about maintaining health, especially students with intellectual disabilities [14].…”

Simple Experiments for Introducing Science to Elementary School Students

“…Many reports have shown the way how to conduct experiments (Maryanti et al, 2020;Nandiyanto et al, 2018;Nandiyanto et al, 2020;Horton et al, 2011). Even, it is available in online news (such as https://www.liputan6.com/health/read/4205272/5-percobaan-sainsseru-yang-bisa-dicoba-bareng-anak-di-rumah and https://id.theasianparent.com/tahapanmetamorfosis-kupu-kupu )…”