Metrological Support of Monitoring Systems Based on Unmanned Aerial Vehicles

Shvydkaya

et al. 2020

Plants

A biogeochemical study of more than 20,000 soil and plant samples from the North Caucasus, Dzungarian Alatau, Kazakh Uplands, and Karatau Mountains revealed features of the chemical element uptake by the local flora. Adaptation of ore prospecting techniques alongside environmental approaches allowed the detection of geochemical changes in ecosystems, and the lessons learned can be embraced for soil phytoremediation. The data on the influence of phytogeochemical stress on the accumulation of more than 20 chemical elements by plants are considered in geochemical provinces, secondary fields of deposits, halos surrounding ore and nonmetallic deposits, zones of regional faults and schist formation, and over lithological contact lines of chemically contrasting rocks overlain by 5–20 m thick soils and unconsolidated cover. We have corroborated the postulate that the element accumulation patterns of native plants under the natural geochemical stress depend not only on the element content in soils and the characteristics of a particular species but also on the values of ionic radii and valences; with an increase in the energy coefficients of a chemical element, its plant accumulation decreases sharply. The contribution of internal factors to element uptake from solutions gives the way to soil phytoremediation over vast contaminated areas. The use of hyperaccumulating species for mining site soil treatment depends on several external factors that can strengthen or weaken the stressful situation, viz., the amount of bedrock exposure and thickness of unconsolidated rocks over ores, the chemical composition of ores and primary halos in ore-containing strata, the landscape and geochemical features of sites, and chemical element migration patterns in the supergene zone.

Section: Plants Of Explored and Mined Depositsmentioning

confidence: 99%

Element Accumulation Patterns of Native Plant Species under the Natural Geochemical Stress

Shvydkaya

et al. 2020

Plants

“…To study the ways of increasing peat yield, the technology of developing a peat deposit with improved spread parameters is selected. Peat has been extracted by milling for many years [4,[6][7][8][9][10]. Milling provides peat raw material as milling chips having the following disadvantages: the content of a large number of small dust-like fractions, heterogeneous fractional composition, small bulk mass, quality changes during long-term storage, for example, self-heating.…”

Section: Introductionmentioning

confidence: 99%

Modernization of Mining Scheme in Developing Peat Deposit

Puhova

Лебедев

2021

E3S Web Conf.

The article presents the results of the study of a peat deposit development scheme with improved spread parameters. The parameters are improved by forming the spread as moulded particles of a certain shape and size determined by the size of moulding machine grooves and the degree of peat relaxation. To obtain such particles a milling cutter is proposed to be replaced by a moulding mill at the stage of peat deposit milling. When excavated, the peat mass is loosened and fed into a roller moulding machine where the rollers, rotating in opposite directions, capture it and the peat is compressed. The loose structure changes into dense particle-particle packing. The circumferential speeds of roller rotations are equal. A trapezoidal groove profile is chosen for the moulded particles to leave it. The groove depth is 10 mm. The uniformity of the moulded enlarged particle distribution over a drying field is characterized by a spread variation coefficient, which allows the spread quality to be evaluated. The enlarged particle spread is normalized by some cumulative actions characterizing the spread by parameters (the thickness, the average particle size, the size uniformity, the number of layers). Therefore, the drying of enlarged particles is intensified and peat yield per unit area is increased.

“…The cheapest method of extraction of lake sapropel is hydro-mechanized, in which the extraction is carried out using a dredger [8,9,10]. Low profitability of sapropel production using this method is due to its high humidity, reaching 92-96 %, and the difficulties connected with moisture removing.…”

Section: Introductionmentioning

confidence: 99%

Effect of electroosmosis to reduce the adhesion of lake sapropel to the metal surfaces of the machine for lake sapropel dewatering

et al. 2021

Recently, there has been an increase in consumer demand for organic products, which implies the use of natural fertilizers in agriculture and food additives in animal husbandry. The moisture content of products obtained from sapropel for use in animal husbandry and agriculture should vary between 60 and 65%. But the reason for the low profitability of production for the extraction of sapropel is due to its high humidity, which can reach 92-96 %, and the complexity of removing moisture. Currently, a significant problem in the dewatering of sapropel is its sticking to metal surfaces of knives-inverters and plane-parallel plates-separators on machines for its dewatering. To solve this problem, it is proposed to use the effect of electroosmosis. In this paper, the rational parameters of the operation necessary to create the effect of electroosmosis in the intermediate attachment of processing of sapropel of the machine for sapropel dewatering are determined.