Terra Rossa Soil as an Adsorbent to Remove Hexavalent Chromium in Aqueous Solutions
نویسندگان
چکیده
Abstract Kaolinite is a phyllosilicate clay of type 1:1 which usually associated with iron oxides in nature. The abundant Terra Rossa soils located the Gunungkidul, karst area. Based on structure and nature it’s charge, it has potential to adsorb anionic heavy metals, especially hexavalent chromium. Heavy metal chromium form very dangerous for human health mostly produced from waste leather tanning factories that are widely available Yogyakarta. purpose this study was investigate possibility using soil as an adsorbent remove Cr (VI) aqueous solution. experiment carried out by mixing dose of: 1 – 4.5 grams fine soil, Φ 0.5 mm into 50 ml solution containing 10 ppm pH 5 3. Stirred at 200 rpm 2 hours, then centrifuged 3500 20 minutes. filtrate given phosphoric acid diphenyl carbazide measured spectrophotometer wavelength 540 nm. results showed average percentage removal = 30%, while 3 49%. absorption (mg/g) decreased line increasing dose. Absorption graphs Freundlich Langmuir models pH3 show R =0.9264 0.9361 respectively, pH5 values 0.3752 0.3461, respectively. Adsorption capacity according 1.7331 mg/g, 5.28 mg/g adsorption site affinity 0.1894 L/mol.
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ژورنال
عنوان ژورنال: IOP conference series
سال: 2023
ISSN: ['1757-899X', '1757-8981']
DOI: https://doi.org/10.1088/1755-1315/1242/1/012018