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Proses Adsorpsi Logam Pb Dan Cu Menggunakan Adsorben Komposit Spent Mushroom Substrate (Sms) - Spent Bleaching Earth (Sbe) Terhadap Variasi Massa Dan Waktu Kontak
ABSTRACT
Industrial printing wastewater contains heavy metals such as lead (Pb) and
copper (Cu), which are toxic and difficult to degrade, thus requiring an effective
treatment method. One alternative to reduce heavy metals is the adsorption
method using a composite adsorbent made from Spent Mushroom Substrate (SMS)
and Spent Bleaching Earth (SBE). This study aims to determine the removal
efficiency and optimum adsorption capacity of Pb and Cu in printing wastewater
using the SBE-SMS composite. The adsorbent composite was prepared with a
composition of 75% SMS and 25% SBE using 10% cornstarch solution as a
binder. Fixed variables in this study were the wastewater pH (5) and stirring
speed (60 rpm), while the independent variables were adsorbent mass variations
(1, 3, 5, 7, and 9 grams) and contact time (40, 50, 60, 70, and 80 minutes).
Adsorbent characterization was conducted using BET, SEM, and FTIR analyses.
The results showed the highest removal efficiency of Pb and Cu was achieved at 1
gram adsorbent mass and 60 minutes contact time, with efficiencies of 83.062%
and 82.925%, respectively. The maximum adsorption capacities for Pb and Cu
under the same conditions were 3.468 mg/g and 2.878 mg/g, respectively.
Keywords : Adsorbent, Copper (Cu), Lead (Pb), Spent Bleaching Earth (SBE),
Spent Mushroom Substrate (SMS).
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