Essays about: "hydroxide precipitation"

Showing result 1 - 5 of 9 essays containing the words hydroxide precipitation.

  1. 1. Reducing cadmium emissions to water during removal of electrostatic precipitator ash : Investigating the effect of process parameters on the formation and precipitation of insoluble cadmium salts in water solutions

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Lukas Esperi; [2022]
    Keywords : cadmium; electrostatic precipitator ash; heavy metals; hydroxide precipitation; recovery boiler; elfilteraska; hydroxidfällning; kadmium; sodapanna; tungmetaller;

    Abstract : The removal of electrostatic precipitator (ESP) ash by solving the ash in water constitutes an environmental problem if heavy metals, such as cadmium, present in the ash remain in the outgoing effluent streams. The ESP ash solution is alkaline, meaning cadmium is present as the insoluble salt Cd(OH)2, cadmium hydroxide. READ MORE

  3. 2. Recovery of valuable metals from spent HEV NiMH battery leach solutions

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Jonas Ricknell; [2017]
    Keywords : Recycling; Hydrometallurgy; NiMH; Supported liquid membrane; Mixed metal hydroxide;

    Abstract : As the demand on resources is increasing worldwide, the process of recycling material has become more important. The specific recycling of metals used in car batteries, and more specifically in the large batteries used in hybrid electric vehicles, is a rising concern where the industrially implemented recycling processes concerning these batteries that exist today are often highly pollutant and energy consuming. READ MORE

  4. 3. Fate of Heavy Metals in Waste to Energy (WtE) Processes

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Ninus Chamoun; Viktor Kjellvertz; William Mahajan; Yuanchao Song; [2016]
    Keywords : Wastewater treatment; Removal of heavy metals; Precipitation; Condensate treatment; Modelling with PHREEQC and Medusa;

    Abstract : This study was made to increase the understanding of how heavy metals in the aqueous phase are removed at low initial concentrations in different pH and Eh values. The reaction that has been studied is mainly hydroxide precipitation and adsorption in a condensate treatment. READ MORE

  5. 4. Estimating soluble arsenic and phosphorus concentrations under Precambrian oceanic conditions

    University essay from Stockholms universitet/Institutionen för geologiska vetenskaper

    Author : Christoffer Hemmingsson; [2014]
    Keywords : Arsenic; Phosphorus; Co-precipitation; Precambrian; Oceanic P levels; Ferrihydrite synthesis; Distribution coefficient; Banded iron formation;

    Abstract : Original estimates of phosphorus (P) concentrations in the Precambrian oceans before 1.9 Ga gave a budget of ~10-25% of modern day levels. READ MORE

  6. 5. Split of sodium and sulfur in a Kraft mill and internal production of sulfuric acid and sodium hydroxide

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Helena Lundblad; [2012]
    Keywords : LignoBoost; electrodialysis; salt split; bipolar membrane; internal production;

    Abstract : The removal of lignin in a Kraft pulp mill, with the aim to utilize the lignin as more value added green product than just firing lignin in black liquor, is possible with a LignoBoost plant. The LignoBoost plant uses sulfuric acid in the process and this results in an increased net input of sulfur to the pulp mills recovery cycle. READ MORE