RANCANG BANGUN SISTEM MONITORING LAJU DEGRADASI METHYLENE BLUE YANG DI ADSORBSI MENGGUNAKAN KARBON AKTIF BERBASIS INTERNET OF THINGS (IOT) = Design of Monitoring System for Methylene Blue Degradation Rate Adsorbed Using Internet of Things (IoT) Based Activated Carbon

The chemical industry, which uses synthetic dyes such as methylene blue (MB), has grown rapidly as the world's population has grown. MB is often found in industrial waste, is difficult to break down and can cause environmental problems. One way to reduce the negative impact of MB is to use activated carbon adsorption. As technology advances, the Internet of Things (IoT) is emerging as a solution for monitoring environmental parameters. Aims. The aim of this study is to design a degradation rate monitoring system using changes in light intensity and measuring temperature and pH as related variables in real time. Methods. The method used is photometric design, using sensors connected to an Arduino integrated with a wifi module and a telegram application. Results. The system measures the degradation rate with RW-157 photodiode sensor and related variables with 4502C pH sensor and DS18B20 temperature sensor. The measurement results of the designed system obtained a degradation rate of 91.07%, pH decreased from 8.02 to 7.21, and the highest degradation occurred at a temperature of 31.82°C. Conclusion. The monitoring system designed works well with a difference of 2.25% between the degradation rate measurement and the UV-Vis comparator.

Keyword : Methylene blue, IoT, Photodiode sensor, Telegram