Enhanced removal of scaling cations from oilfield produced water by carrier mineral floatation

Abstract

This work reports a novel carrier flotation protocol for removing scaling cations from an oilfield produced water source which significantly reduces the collector consumption by employing natural minerals such as quartz, montmorillonite and talcum as the scaling cations carriers. The scaling cations uptake onto all carrier minerals exhibited homogeneous and monolayer adsorption, which was mainly dominated by physisorption. After adding oleate collector, the scaling cations removal rate was further enhanced, which was attributed to its high affinity with the scaling cations. Notably, the talcum flotation process simultaneously offered a high scaling cations removal rate (76.1%) and mineral recovery rate (98.3%), which achieved a sediment yield reduction of 72.2%. By summarizing the characterization results, the scaling cations removal mechanisms were also proposed. Moreover, high regeneration efficiencies (86.1% and 84.8% for quartz and talcum regeneration within three cycles) were achieved by the proposed regeneration protocol. This carrier flotation protocol with its low collector consumption offered technical promise for scaling cations removal from oilfield produced water.

Investigation of the Reactor Decommissioning Dose Field Calculation and Virtual Simulation Techniques: Preliminary Design for the Decommissioning of the First Heavy Water Research Reactor (HWRR) Reactor in China

“…After the program successfully read the dose field file, the dose field will present in the visualization interface. If the displayed color of the dose field does not meet the needs, the chromatography tool should be used to set, the interface of chromatography tool is shown in The Heavy Water Research Reactor is the first large research reactor to be decommissioned in China [31][32][33][34][35][36][37][38]. The main body of HWRR reactor adopts the multi-layer canister structure.…”