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All Journal Journal of Fundamentals and Applications of Chemical Engineering
Sri Rachmania Juliastuti
Departement of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS-Keputih-Sukolilo, Surabaya, 60111, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering

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Copper Recovery of E-Waste Disposal (SIMCARD) by Using Electro-Generated Chlorine Prasetyo Chandra; M. Maktum Muharja Al Fajri; Sri Rachmania Juliastuti
Journal of Fundamentals and Applications of Chemical Engineering Vol 3, No 2 (2022)
Publisher : Journal of Fundamentals and Applications of Chemical Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v3i2.13029

Abstract

One method for dissolving Cu from e-waste is to use electro-leaching. The waste used is Simcard and NaCl as electrolytes. Simcard contains copper metal and several other valuable metals such as silver (Ag), gold (Au) and palladium (Pa). The electro-leaching process is carried out in an electrolytic cell reactor where chlorine gas will be produced from the electrolysis process, then chlorine gas will extract the copper contained in the Simcard. This research was conducted by varying the electrode potential (voltage)/electric current (amperes), salt concentration and time. From this research, Simcard contains copper (Cu) by 40.53% and can be separated by electro-leaching method in a stirred acrylic reactor with the best results under operating conditions; a temperature of 30⁰ C, a pressure of 1 atm, a concentration of 10% salt solution, a potential difference of 10 Volts, a leaching time of 60 minutes, and a stirring speed of 600 rpm resulted in a Simcard metal alloy yield of 98.59%.
Synthesis and Characterization Magnetic Activated Carbon Derived from Coconut Shell for Pb(II) and Cd(II) Adsorption from Wastewater Sri Rachmania Juliastuti; Amanizar Aji Gumilang
Journal of Fundamentals and Applications of Chemical Engineering Vol 6, No 2 (2025): In Press
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v6i2.23422

Abstract

Activated carbon derived from coconut shell is a low cost adsorbent for heavy-metal removal. However, recovery of spent carbon from treated water remains challenging. This study developed a magnetically separable activated carbon magnetite composite (M-CSAC) and evaluated its adsorption toward Pb(II) and Cd(II). Coconut shell activated carbon (CSAC) was produced by Na₂CO₃ chemical activation and modified by mechanochemical incorporation of Fe3O4 through ball milling. SEM–EDX confirmed morphology refinement and successful Fe loading (11 wt.%), while increased surface oxygen indicated Fe–O-rich domains. N₂ adsorption–desorption showed that the specific surface area decreased from 356.04 m2/g to 319.35 m2/g. In contrast, total pore volume increased from 0.256 cm3/g to 0.3166 cm3/g and the average pore diameter widened from 2.88 nm to 3.97 nm, consistent with mesopore development. XRD reflections at 2θ = 30.24°, 35.40°, 43.18°, 57.00°, and 62.50° matched magnetite (Fe3O4). Lattice-parameter fitting (a = 8.3837 Å) supported phase stability without detectable γ-Fe2O3. In batch tests (C0 = 50 mg L⁻¹, V = 100 ml, m = 0.5 g), M-CSAC achieved removals of 99.58% for Pb(II) and 96.44% for Cd(II), with Qe values of 9.958 mg/g and 9.644 mg/g, respectively. Overall, M-CSAC combines high adsorption efficiency with practical magnetic separability for water 
Co-Authors Amanizar Aji Gumilang M. Maktum Muharja Al Fajri Prasetyo Chandra