In this study we investigate the model uncertainties involved in predicting long-term permeable reactive barrier (PRB) remediation efficiency based on a lab-scale column experiment under accelerated flow conditions. A PRB consisting of 20% iron and 80% sand was simulated in a laboratoryscale column and contaminated groundwater was pumped into the column for approximately 1 year at an average gr...

Flow-through columns packed with "aged" zero-valent iron (ZVI) between layers of soil and sand were constructed to mimic a one-dimensional permeable reactive iron barrier (PRB). The columns were continuously fed RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine, ca. 18 mg l(-1)) for over one year. Two columns were bioaugmented with dissimilatory iron reducing bacteria (DIRB) Shewanella algae BrY or ...

Abstract This paper proposes a methodological framework to develop data-driven process control using pure industrial production data from cast iron foundry, despite the limitation of complete casting traceability. The aim is help sand foundries produce good castings. A reference which produces mainly automotive and oven parts with automatic molding pouring machines, was selected. Past data, whe...

The facts on the ground show that most mining in Indonesia is carried out using an open pit so it has impact environmental damage. This study aims to determine factors cause iron sand conflicts and develop a concept of conflict resolution Kulonprogo Regency, Yogyakarta Special Region Province. research method used juridical-empirical law research, with juridical case approach, which then analyz...

One of the methods used to surface hardening ductile iron is chilled cast iron. Chill as fast cooling rate in mold during solidification and chill thickness greatly affects hardness layer. The main material iron, SS 304. Casting uses sand casting method. Before pouring, plate has been inserted onto pattern that formed mold, then preheated at 700°C. Pouring was carried out a melting temperature ...