THE EFFECT OF SODIUM SILICATE ADDITION ON COPPER (Cu 2+) ADSORPTION BY SIDOARJO MUD AND ITS SOLIDIFICATION PRODUCT AS CLAY BRICK

• Main Author: SETIAKURNIASIH (NIM 25305015), YANTI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/9655
• Institution: Institut Teknologi Bandung

On 29 May 2006, near the Banjar Panji I drilling well at Renokenongo village Sidoarjo District East Java, occured an eruption of steam, water, and subsequently mud, known as Sidoarjo hot mud flow. Characterization upon the mud soil showed that the soil classification was silty clay which has pozzolanic and metal adsorption ability. Furthermore, the heavy metal content of the mud soil was found to be lower than landfill standard and TCLP requirement. <br /> <br /> <br /> <br /> <br /> This research was performed to find out the effect of sodium silicate addition on copper adsorption and the quality of clay brick made from SIdoarjo mud. The possibility of making clay brick from Sidoarjo mud soil was carried out on laboratory scale. The sodium silicate addition was 0 : 9,5 : 1, and 1,5% per weight mud soil used on the mixture. Models were air dried for 0, 7, and 14 days and burnt at 600 oC and 1140 oC for 8 hours. Highest unconfined compressive strenght was achieved by models which under goes drying process in 7 days, burning temperature 1140 oC and 1% sodium silicate. <br /> <br /> <br /> <br /> <br /> In adsorption study, 30 ppm of copper standard solution under pH 3, 4, and 5 were used. The dosage of Sidoarjo mud soil as adsorbent with and without sodium silicate addition respectively was 1 gram and 5 grams. Copper adsorption without addition of sodium silicate did not fit the Freundlich and Langmuir equation. However, the highest Barrow-Shaw constants which explained the relation between sorption capacity, concentration and contant time was achieved by splution under pH 4 and the appropriate kinetic model were the Lagergen second order equation. As for, the adsorption of copper using Sidoarjo mud soil and addition of sodium silicate, the experiment were fit to the Freundlich, Langmuir and Barrow-Shaw model where its highest sorption capacity was achieved under pH 3. The kinetic equation were best fit to the Lagergen second order equation. The statistic analysis showed that replication did not affected the adsorption process significantly. On the contrary, the contact time, pH, and the addition of sodium silicate had the significant role on the process. <br />