A Review on the Effect from Steel Slag on the Growth of Microalgae

Abstract

As a by-product from the metallurgical industry, steel slag contains a large amount of metal elements. In many developing countries, the output of steel slag is huge and the comprehensive utilization rate is low, hence the development of a novel application method for steel slag is of great significance to increase its utilization rate to improve the environment. This paper reviewed the dissolution behavior of Fe, P, Ca and silicate of steel slag under seawater and acidic solutions as an application in the cultivation of different microalgae, such as diatoms, spirulina, and chlorella. This review clarifies that proper pre-treatment of steel slag can effectively increase the dissolved elements of steel slag in the solution and provide more nutrients for the growth of microalgae. Microalgae cultivated with steel slag as a nutrient can be used to produce biodiesel which has a very broad application prospects for cleaner production and environmental protection.

Direct Conversion of Desiliconization Slag to a CaO-Mesoporous Silica Composite for CO₂ Capture: Effect of Acid Dissolution Agent

“…Experts estimate that the total accumulation of steel slags since 1980 has surpassed 2.5 billion tonnes and has been growing at a pace of approximately 3-4% per year at the present consumption rate. 24) Currently, most of the iron and steel-making slag has been utilized in cement, concrete, roadbed materials, and fertilizer. With the increasing production and limited disposal site, new solutions to reuse the waste slags have been required.…”

The Use of Steelmaking Slags in Land and Marine Applications

“…The authors also state that lipid content can increase in a phosphorus or sulphur-deficient environment (Mata et al, 2010;Yu et al, 2021;.…”