Pemanfaatan Karbon Baggase Teraktivasi Untuk Menurunkan Kadar Logam Tembaga Pada Limbah Kerajinan Perak Di Lombok Tengah

Abstract

Copper metal levels in silver craft waste can cause health problems in humans
and pollute the surrounding environment. One method of processing wastewater
is the adsorption technique using activated carbon dioxide. The first step is to
first determine the copper metal content in silver handicraft waste in Ungga
Village, Central Lombok. Furthermore, the waste water is contacted with
activated carbon. The production of activated bagasse carbon consists of three
stages, namely first dehydration by burning bagasse until it turns into carbon,
second carbonation which is heating temperature of 500ºC, carbon yields of 100-
200 mesh and third, activation by immersing 50 grams of carbon in 500 mL 15%
NaOH during 12 hours. After that the carbon is dried at 110ºC and finally heated
at 500ºC for 1 hour. The bagasse carbon that has been made is put into 25 mL of
waste water sample with a mass of 2 grams of adsorbent. The sample is then
stirred at various contact times of 30, 60, 90, 120 and 150 minutes at a speed of
180 rpm using a batch system. The optimum contact time and concentration are
used to calculate the efficiency of decreasing copper metal content by calculating
the difference in copper metal content before adsorption and after adsorption
using activated carbon dioxide. The concentration of all Cu (II) metals was
analyzed using Atomic Absorption Spectrophotometer (AAS). From the research
it was found that the copper metal content in the sample was 14.5710 ppm. The
optimum contact time for copper metal adsorption is at 120 minutes contact time
which results in optimum adsorption efficiency in ferrous metals, namely
84.88%.