Conducted in UNS Headquarters, Gedung Pusat dr. Prakosa, Regent of Sukoharjo, Wardoyo Wijaya stated that his administration is fortunate to be able to learn US’ waste management system.

“Our visit to US is on good purpose and profitable. Because waste management that has been done there is highly developed,” Wardoyo stated.

(left to right): US Ambassador, UNS Rector , and Sukoharjo Regent on US Visit, Thursday (19/1/2017)

Juliyatmono, Regent of Karanganyar, said the government of Karanganyar will soon make a follow-up action regarding the result of his visit to US last December. Nowadays, waste management will be conducted by choosing, packing, and selling. After that, the right technology to manage waste will always be developed and implemented.

Joseph R Donovan, Jr, the US Ambassador for Indonesia, stated that the visit of UNS team, Karanganyar Regency, and Sukoharjo Regency to USA and his visit to UNS is a positive manifestation of partnership relation that has been developed between Indonesia and US, especially in strategic partnership.

“We also discussed about the steps we can make because we feel that this is an important step, we must continue this process,” Joseph said.

Meanwhile, Ravik hopes the US partnership with Indonesia, especially UNS and Solo will not only in waste management, but also in education, culture and other sectors. (Refita Helya Shufia/Dty/Hfz)

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Because of those problems, Sugito conducted research on the processing of Chromium waste (Cr) using adsorbent roof-tile powder through column system. Sugito, the laboratory assistant of Sub-Laboratory of Chemistry UNS, said that Chromium (Cr) is used in industries and factories, for instance, paint industry, insecticide industry, fungicide, catalyst, photography and additive substance.

Human body tolerates the small number of Chromium metal for about 30 μg / kilogram of weight body. On the contrary, the number of Chromium metal which is more than 1,00 ppm in human body can cause acute poisoning.

Sugito chose roof-tile because the clay as the basic material is composed from silicate alumina compound whose particle is smaller than 2 μm. Clay contains silicate (SiO₂), 61,43%, and Alumina (Al₂O₃), 18,99%. Natural clay is porous material so it can absorb and has ions exchangeable with the outer ones. In addition, clay has specific surface width and high porosity. Clay also has the plastic characteristics when it is smoothed and moistened, hard and stiff if it is dry, and vitreous if it is burned in high temperature.

The result of  Chromium (Cr) waste processing from the remainder of the COD test using adsorbent roof-tile powder through column system conducted by Sugito showed that Chromium (Cr) concentrate decreased to the limit of the quality standard of chrome in waste, which is 0,5 mg/L according to Provincial Regulation in Central Java on Quality Standard of Wastewater. The longer the column is, the more effective the concentration of metallic chromium (Cr) to decrease, and the smaller the roof-tile powder size, the more effective the concentration of metal chromium (Cr). For his research, Sugito was awarded as Outstanding Laboratory Assistant UNS 2016. The award was given by the Rector of UNS at the celebration of the Proclamation Day. [revita.red.uns.ac.id]

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