The pigments prepared with ferrochrome, manganese oxide, flotation waste (C6) or iron oxide scale (D4) and calcined at 1300 °C have a darker brown colour and possess suitable L*a*b* values as 30.1, 2.7, 1.6 for C6 and 30.9, 2.1, 0.3 for D4, which are closer to the L*a*b* values (30.1, 2.9, 0.1) of commercial MnFeCr pigments.
This paper describes the immobilization of trialkyl phosphine oxides (TRPO) waste in Gd2Zr2O7 pyrochlore through designed elements occupation.
This reaction In of importance In complex process of simultaneous removal of sulphur dioxide and nitrogen oxides from waste gases.
According to some research studies, the heterogeneous catalysts used for palm-based and Jatropha-based biodiesel productions are mainly from solid base catalysts e.g. alkali metal supported catalyst, hydrotalcite, alkaline-earth metal oxides, mixed metal oxides and natural waste shell, which render high transesterification activity with > 80% of biodiesel yield.
A feasible approach to synthesis iron oxide (Fe3O4) from waste iron ore tailings (IOTs) to synthesis magnetic graphene (Fe3O4/rGO) is demonstrated in the present study.
By this manner, waste zirconium oxide adsorbent in the end of phosphate removal can be functionalized as a new cation exchange material for following Cs removal application.
The strength performance is typical of a very reactive binder, being suggested that it is due to the calcium hydroxide and also to the nucleation centers provided by the iron oxide of the mine waste mud.
Calcined (900 °C, 2 h) calcium oxide (CaO) sourced from waste mud crab shells and cockleshells were mixed in a 1 1 mass ratio to be used for transesterification of waste cooking oil (WCO) at 5 wt.% catalyst and a methanol to oil molar ratio of 13:1 for 3 h at methanol refluxing temperature to give 98% conversion.
The locations of some sites, which included radioactive waste, beryllium oxide, and other toxic compounds, were not recorded.
