Vol. 6 No. 1 (2007)

Ultisols is soil which predominate area in Lampung Province. This soil is rather acid until acid reaction, low in cation exchange capacity (CEC) and organic materials content so that cause inefficient of fertilization. Zeolite is a available and potential mining products and it is abundant available in Lampung Province. It can also to improve CEC of soil so that the absorption of soil to fertilizer can be increased. Besides, it has a high negative charges, so that it can also absorbed of nutrients and discharged it slowly. A liquid waste of MSG is an agroindustrial waste which enough…

Seawater contains large amounts of cations. Since this resource is abundant and cheap, it can be a laudable source of plant nutrients. The objective of this study was to investigate the extent to which zeolite could sorb and desorb nutrients in different concentrations of seawater. Results indicated that Zeolite sorbed Na and Mg. The highest percentage of Na and Mg sorbed was 76.19 and 36.69%, respectively obtained for 10% seawater. The desorption study indicated that the higher the seawater concentration used during the sorption, the higher the Na and Mg desorbed. Passing diluted seawater…

The research was conducted at laboratory of 2nd Crop Production, Lampung State Polytechnic using water added to zeolit in rubber processing and crumb rubber quality testing in PKST Kedaton. PTP Nusantara VII. The most important things in crumb rubber processing are water utilizing in latex dilution. Using lot of water in latex dilution can be straight away on rubber quality such as colour index, PRI, ash content, and dinginess content. The experiment was conducted on factorial method with completely randomized block design consist of two factors (4 x 5 with 3 replications. The first factor is…

The intrusion of seawater in the beach area of Bandar Lampung and the Eastern beach of Lampung causes many problems for people because it turns the water into a brackish water. The brackish water is the water whose salinity is between 0.5 ppt until 17 ppt. The brackish water cannot be used for drinking, cooking or washing because the maximum degree of salinity for such purposes is 0.5 ppt. Desalination of brackish water is a process of reducing the salinity of a brackish water. In this research, natural zeolite from Lampung was modified with surfactant to become surfactant-modified zeolite…

This research was started with making a catalyst of CuO/ZnO/ZSM-5 with copresipitation method which using nitrate salts of Cu and Zn at buffer of zeolite ZSM-5 with loading (weight CuO and ZnO into their buffer) 10%, 20%, 30%, 40% and the pure of ZSM-5. The product of catalyst is then activated tested by hydrogenation reaction, where CO2 gas become the methanol by reacting of CO2 dan H2 into unggun reaction in operation condition: the pressure of 25 bar, with temperature at 250ºC, feeding ratio CO2/H2 = 1: 3. The making catalyst of CuO/ZnO/ natural zeolite each with impregnation method and…

This research was conducted 6 weeks to study the effect of zeolit in ration on feed consumption, average daily gain (growth rate), and dressing percentage of male local rabbits. Twenty four rabbit were used in this research designed by randomized completely block design. The treatment of research were level of zeolit on ration that was 0.0; 2.5; 5.0; 7.5 % of dry matter. This research indicated that zeolit didn