Bottom sediments of wastewater treatment settling ponds system as a promising complex raw material

Abstract

The paper considers the potential possibility of using sediments formed by settled suspended solids from settling ponds of the wastewater treatment system as a complex raw material. Leaching of pre-agglomerated suspensions with 2% sulfuric acid using 30% sulfuric acid as a binder in 90 days made it possible to extract 36% of copper and 55.7% of nickel. The sorption properties of fired granules made with the use of sulfite-alcohol stillage as a binder in relation to copper and nickel ions have been demonstrated. In the first few days of the experiment, it was possible to adsorb 68-73% nickel and 90-92% copper from the model solution supplied to the percolator. The possibility of obtaining a brucite-containing sorbent by hydrochloric acid opening of the initial material of suspensions and its use for purifying model solutions from fluorine ions with an efficiency of up to 62% is shown.

Influence of Reagents on Qualitative Indicators of Artificial Anti-Deflationary Phytocenosis on Waste from a Rare Earth Tailing Facility

“…High efficiency of waste and domestic water purification by removing iron, manganese, and aluminum ions has been reported [ 45 , 92 ]. It is possible to obtain brucite reagents from technological sources, which are available in storage, as well as from regional water treatment enterprises upon completion of treatment [ 45 , 93 ].…”

Removal of fluorine from solutions using natural brucite sorbent

“…According to the previously developed methods of hydrochloric acid opening, brucite-containing reagents can be obtained from wastes of a mining complex, in particular, the tailings of concentration of vermiculite and copper-nickel ores [9], bottom sediments of ponds of sedimentation tanks of a coppernickel mine [10].…”

Removal of Sulfate and Metals from Wastewater of a Mining Enterprise by a Dual Sorbent System: A Case Study

“…Effective sorbents can be produced from bio-based materials, such as sawdust, and peat, (Gogoi et al 2019(Gogoi et al , 2021bKeränen et al 2016) as well as brucite, which is a readily available magnesium hydroxide-based sorbent. For example, it is possible to obtain a brucite-containing reagent from technogenic waste, which is available in sufficient quantities in the Murmansk region (Krasavtseva et al 2021). Presently, wastewater treatment at the enterprise occurs by the gravitational sedimentation of suspensions in a settling tank system, but the results do not satisfy either the managers of the enterprise or the supervisory authorities.…”

“…For both, the removal mechanism is based on the principle of ion exchange. This can be represented by the exchange of the crystal lattice magnesium ions with metal ions present in water (Krasavtseva et al 2021).…”