Additional environment applications of lime
Contaminated soil treatment
Lime plays a crucial role in various environmental applications within the water treatment sector. Beyond its primary uses, lime is instrumental in addressing complex environmental challenges such as contaminated soil treatment, acid mine drainage, and optimizing water circuits in the pulp and paper industry.
Contaminated soils, often resulting from industrial activities, can be effectively treated with lime-based reagents, which neutralize harmful compounds and stabilize the soil. In the case of acid mine drainage, lime is used to neutralize acidic waters and precipitate heavy metals, preventing further environmental damage. Additionally, in the pulp and paper industry, lime helps control pH levels and manage microbial growth, ensuring efficient and sustainable water use.
Our expertise and advanced technologies ensure that lime is used effectively to protect and enhance the environment, contributing to sustainable water management practices.
Acid mine drainage
The bio-catalyzed oxidation of pyrite generally causes acid mine drainage. This occurs when pyrite-containing rock is exposed to water and oxygen from the air. The oxidation of pyrite generates sulphuric acid and can dissolve a range of toxic metals that have the potential to pollute groundwater, rivers, lakes, and oceans. Lime is a key reagent used in remediating such scenarios. Lhoist has experience in treating lakes, active mine sites as well as abandoned mine sites.
Pulp and paper water circuits
Lime is used in multiple applications in the pulp and paper manufacturing industry, including optimization of water circuits. Recycled paper and board are produced from recovered wastepaper. Wastepaper contains sizing agents, glues, printing ink, and other impurities that pose challenges to the paper production process. The impurities contained in wastepaper contribute to microbial growth, causing biofouling and noxious odours. Lime is used as a pH control agent to optimize the use of biocides for the control of microbial growth.