8 articles in this issue
Indah Raya,Narsito Narsito,Bambang Rusdiarso
The kinetics of aluminium(III) and chromium(III) adsorption in an adsorbent prepared by immobilization of Chaetoceros calcitrans biomass on silica ge has been investigated. The functional groups which were probable involved in the adsorption processes als... see more
Mukhamad Nurhadi,Wega Trisunaryanti,M Utoro Yahya,Bambang Setiaji
Preparation of natural zeolite catalyst consist of dealumination using acid (HF 1% (v/v), HCI 1M), steaming at calcination temperature and both treatments ware carried out. The modification of the zeolite catalyst was done by loading a small amount of chr... see more
Jasmidi Jasmidi,Eko Sugiharto,Mudjiran Mudjiran
The influence of length and condition of Biomass Storage on the biosorption of lead and zinc that present together in a solution by Saccharomyces cerevisiae biomass were studied. In this experiment, variables of length and condition of biomass storage wer... see more
Apriani Sulu Parubak,Eko Sugiharto,Mudjiran Mudjiran
The effects of salinity on the release of copper (Cu), lead (Pb) and zinc (Zn) in tailing sediment have been studied by stripping voltammetry. The purpose of the research is to know the effect of salinity on the release of metals with certain pH, conducti... see more
Rusman Rusman,Iip Izul Falah,RHA. Sahirul Alim
The intercalation of CuCl2 salts into active carbon and its activity as catalyst on dehydration of n-amylalcohol has been investigated. In this research, the intercalation was conducted by reacting CuCl2 powder with active carbon and Cl2 gas at 3 atm, tem... see more
Eko Suhartono,Djaka Sasmita,RHA. Sahirul Alim
Oscillation process that occurs in a system may be formed from non linear dynamic phenomena that far from equilibrium. Mechanism of oscillation in a chemical reaction system such as Belousov-Zhabotinski (B-Z) reaction is quite complex. For that reason, in... see more
Wega Trisunaryanti
The selectivity of an active natural zeolite (ZAAH) in catalytic conversion process of Bangkirai, Kruing and Kamper woods biofuels has been studied. The ZAAH catalyst was prepared from a natural zeolite (ZA) treated with acids solution (1% HF and 6M HCI) ... see more
Pedy Artsanti,Yateman Arryanto,Kusnanto Kusnanto
The effect of residence time of graphitisation on thermal conductivity of molded graphite has been examined. The examination has been conducted by varying residence time of graphitisation of molded carbon with petroleum coke as raw material and coal tar p... see more