This study aims to determine the uptake capacity of langsat (Lansium domesticum) skin on the adsorption of dyes along with the contact time. Textile dyes are dyes which is harmful for the environment and living things. This textile industry waste can cause a decrease in water quality. When this carcinogenic dye enters the human body, it can lead to cancer. The process of these dyes adsorption use langsat skin samples. The components of langsat skin that can adsorb dyes are triterpenoids, saponins and flavonoids. This study uses a batch method by treating the contact time variations of several dyes. The results reveal that the biomass adsorption on rhodamine B, methyl orange, and methylene blue dyes were 11,578 mg/g, 3.8425 mg/g, 36,735 mg/g respectively and with optimum contact time of 60, 90 and 150 minutes, respectively.
Pengaruh pH dan dosis adsorben dari limbah lumpur aktif industri crumb rubber terhadap kapasitas penyerapan ion Cd(II) dan Zn(II) The effect of solution pH and adsorbent dosage on the adsorption of Cd(II) and Zn(II) ions from aquoeous solution by activated sludge of crumb rubber industry
All Biosorption of Malachite green and Rhodamine B dyes using banana peel (Musa balbisiana Colla) as a biosorbent has been carried out. The purpose of this study was to determine the effect of pH and concentration for biosorption of Malachite green and Rhodamine B by banana peel biosorbent (Musa balbisiana Colla). The method used is the batch method. The maximum wavelength of Malachite green is 618 nm and Rhodamine B 555 nm measured by the UV-Vis Spectrophotometer. The results showed that the optimum conditions for Malachite green adsorption occurred at pH 3, a concentration of 100 ppm 8,0662 mg/g. The optimum conditions for Rhodamine B adsorption occurred at pH 3, a concentration of 120 ppm 16,6614 mg/g. The adsorption isotherm of Malachite green with banana peel (Musa balbisiana Colla) biosorbent tends to follow the Freundlich isotherm with a determinant coefficient (R2) of 0.9996 and Rhodamine B 0,9884.
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