A manned submersible was used in a fjord in southeastern Alaska to study the distributional patterns of the red king crab (Paralithodes camtschaticus) and the Tanner crab (Chionoecetes bairdi) in summer. The cove was divided into three zones: inner, middle, and outer. Six types of habitats, including sand-mud, rock, shell, debris, rock wall, and algae, were identified from video tapes. A relati...

Red mud (RM) was produced during alumina production from bauxite known as the Bayer process. Arsenic was detected in the solid phase of RM (RMsf) which was disposed in the disposal area. This study investigates the effectiveness of using Zero-valent iron (ZVI), ferrihydrite, ferrous sulfate (FeSO4), waste acid (WA) or CO2 for immobilization of arsenic in the RMsf. To test the effect of the amen...

The functional and mechanical properties of steel slag (SS)–red mud (RM)–electrolytic manganese residue (EMR)-based composite mortar under different matching ratio conditions were investigated in this paper to examine the synergistic cementing effect among multiple solid wastes. hydration characteristics its microstructure characterized by heat assessment, X-ray diffraction, thermogravimetric a...

• Red mud contains large amounts of microscale particles. Microscale particles strongly adhere to the earthworm epidermis. E. fetida dermal pores may be blocked by Micro-particles impair earthworms’ respiration and nutrients uptake. Amount RM < 1 ?m should not > 20 % if used for soil amendment. (RM) quantities high concentrations potentially toxic elements. In this research, we have two types s...

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Red mud (RM) is the main residue produced by alkaline extraction of alumina (Al2O3) from bauxite, and it contains valuable metals such as iron (Fe), aluminium (Al), titanium (Ti), magnesium (Mg), manganese (Mn), rare earth elements, etc. This research aimed to investigate biologically induced leaching some elements raw RM without preliminary biomass enrichment inoculum, simultaneously reducing ...

Abstract Red Mud is a bauxite solid waste which dangerous for the environment because of its alkalinity (10-13). With very high pH, it can interfere with hydrological conditions areas that are directly affected by mud. Efforts to utilize red mud have use-value been widely carried out. consists Gibbsite, Hematite and Cristobalite. The main ingredients Fe 2 O 3 , Al SiO still be utilized 44.66%, ...