Efektivitas Ampas Tahu Sebagai Adsorben Logam Tembaga Pada Air Limbah Industri

Abstract

Copper is one of the toxic metals for health and the environment. In humans, high doses of copper metal can cause vomiting, dizziness, weakness, kidney and liver symptoms, anemia, to coma, and in severe cases, the patient can die. Judging from the dangers, proper waste management is needed to reduce the side effects of these pollutants. A practical and inexpensive technology is an adsorption adsorption technique using an efficient and easily available natural adsorbent, namely tofu dregs. The protein contained in tofu is one of the reasons for using tofu waste as an adsorbent. The absorption of amino acids that form two-charged ions (zwitter ions) is owned by proteins. Toxic metal can be bound to protein as metallotionein. The study consisted of four stages, namely (1) Analysis of initial copper content in silver craft waste; (2) Preparation of tofu waste adsorbent; (3) Characterization of tofu dregs adsorbent; and (4) variation of adsorption contact time. The study used a laboratory-scale experimental method. The adsorbent was contacted with the sample using a magnetic stirrer at various times. Instrument Atomic Absorption Spectrometer was used for the analysis of copper metal content and identification of its functional groups using an infrared spectrometer with the result that tofu waste has functional groups -OH, NH (stretching), CH (aliphatic), C=O, -OH (bending vibrations). , and CO. Copper metal content obtained is 19.5979 ppm. The optimum adsorption time was reached at 120 minutes with an optimum adsorption efficiency of 54.88%.

Utilization of Borrasus flabellifer L. Palm Coir Activated with Potassium Hydroxide (KOH) as an Efficient Adsorbent for Rhodamine B Dye Removal

“…The increase in adsorption power is due to the fact that the active side in the pores of the activated carbon has not yet experienced a saturation point (Indah and Safnowati, 2019). Meanwhile, the contact time of 120 to 150 minutes experienced a decrease in adsorption efficiency caused by the adsorbent experiencing saturation due to the adsorbent pores being fully filled, resulting in desorption, namely the release of the adsorbate back into the solution (Indah et al, 2021). From the research results, it was obtained that the optimum contact time using activated charcoal occurred at a contact time of 90 minutes with a concentration after adsorption of 1.674 ppm and an adsorption efficiency of 94.42%.…”

Sintesis Selulosa Asetat dari Sabut Buah Lontar (Borassus flabellifer Linn) dengan Variasi Volume Anhidrida Asetat

“…Analisa menggunakan FTIR (Fourier Tansfom infrared spectra), ini dilakukan untuk mengetahui keberhasilan dari sintesis selulosa asetat dengan mengindentifikasi pola serapan khas dan perubahan gugus fungsi selulosa asetat dari sabut buah lontar (Indah et al, 2021).…”

Adsorption of Copper Ion from Acidic Wastewater by Local Natural Zeolite

“…The copper metal threshold in wastewater must not exceed 0.5 mg/L based on the Regulation of Indonesian Minister of the Environment. In human body, copper in high doses can cause vomiting, anemia, dizziness, weakness, kidney and liver failure, and dead (Indah et al, 2021).…”