Calcium Chloride Solution Research Articles

Plaster board waste (PBW) – A potential fluoride leaching source in soil/water environments and, fluoride immobilization studies using soils

Plaster board waste generated from industries, usually contains major proportion of calcium as calcium sulfate. In addition, fluoride is remarkably one among the constituents of this waste material which leaches off into the soil and aquatic environments and causes fluoride pollution. In order to simulate how the dumping of PBW causes fluoride contamination in soil and water sources, shaking and stirring based batch-mode leaching studies were conducted. These studies explored the leaching of fluoride as a function of particle size, agitation time, pH of the leaching solvent (distilled water), L/S (water: PBW) ratio, temperature and electrolytes. It was explored that 1 g of plaster board waste contains18.54 mg F per gram of PBP. High leaching of 3.72 mg F per liter was studied at pH 6.02 with Ca2+ and TDS contents of 1050 mg L−1 and1640 mg L−1 respectively. The influence of sodium electrolytes such as chloride, nitrate, hydrogen carbonate, carbonate, sulfate, borate, phosphate and acetate on the leaching of fluoride from PBW was studied. The influence of fluoride leaching by sodium phosphate recorded a high value of 12.75 mg L−1 with no detectable amount of calcium ions. The influence of eight electrolytic mixtures each containing five sodium electrolytes on fluoride leaching corroborated the highest leaching in mixtures containing phosphate followed by hydrogen carbonate/carbonate. Solutions of calcium and aluminium chloride and their mixture were used to measure the rate of leachable fluoride in solution. Furthermore, the fluoride leaching at different temperatures and acids was studied. Naturally occurring soils when blended with PBW were observed to immobilize fluoride and lessened the amount of leaching fluoride in water. Various characterization studies such as FTIR, Raman, FESEM (with EDS), XRD and XPS were carried out for PBW and its treated samples using different electrolytes. Fluoride leaching proportionate to the precipitation of carbonate and phosphate was recorded in the case of appropriate electrolyte and mixtures.

Effect of calcium chloride solution on the spontaneous combustion of coal using Olpiński method

The article concerns the effect of the additive on the inhibition of the coal spontaneous combustion process (CSC) by the Olpiński method. The influence of inhibitors on CSC in this method has not been studied so far. Coal samples used in the experiment were taken from Polish coal mines, from which four samples with the symbols S1, S2, S3, and S4 were created, respectively. For each coal sample, a spontaneous combustion index was tested following the Olpiński's method. In addition, analogous tests were performed for coal samples treated with an aqueous CaCl2 solution. A 20% CaCl2 solution has proved to be the most advantageous. Based on the Olpiński method, a fire incubation period is determined in natural conditions on a mine site. Based on the results of CaCl2 inhibition, the extension of that period for examined coals was determined. The results obtained can provide valuable references for developing technology in CaCl2 usage to prevent spontaneous fires in coal mines.

Dye adsorption performance of nanocellulose beads with different carboxyl group content

The problems caused by water pollution are increasingly serious, wastewater contains a lot of heavy metal ions, textile dyes, medicines, etc. However, most adsorption materials usually face problems such as inefficient recycling, high cost, and secondary pollution. As a natural polymer, cellulose has low cost, degradability and good biocompatibility. In this work, by changing the addition amount of sodium hypochlorite during 2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation, nanocellulose with different carboxyl content could be prepared, which is expected to be a good high-efficiency cationic adsorbent due to its rich in hydroxyl groups on the surface and negatively charged. Then the calcium chloride solution was used as the cross-linking agent to prepare TEMPO-oxidized cellulose nanofibril beads (TOCNB) by the dropping solidification method. As the content of carboxyl groups increases, the Zeta potential value of the nanocellulose dispersion became increasingly negative. The nanocellulose beads all presented a good three-dimensional network porous structure. With the increase of carboxyl group content, the specific surface area increases from 173 to 367 m2 g−1, and the adsorption capacity for methylene blue (MB) also gradually strengthened. The saturated adsorption capacity of TOCNB on MB was calculated as high as 925.93 mg g−1. The nanocellulose bead was a cationic adsorbent with highly efficient adsorption and adjustable specific surface area, and the preparation method was simple, fast, efficient and green.

Fitness recovery and two-generation phenotypic plasticity in the freshwater snail Planorbarius corneus L. exposed to hyperosmotic solutions

Background and purpose: Hyperosmotic solutions of calcium chloride and calcium bromide, extensively used in the oil industry, can be a source of aquatic pollution.Materials and methods: In the present study, we investigated whether the freshwater snail Planorbarius corneus L., previously chronically exposed to toxic concentrations of these chemicals, can recover fecundity and growth in clean water. We also examined if a higher tolerance could be induced in F1 offspring after parental and developmental chronic exposure to the chemicals.Results: The fitness-recovery study showed a high compensatory potential of the snails to recover fitness through increased reproduction and growth. In the tolerance study, we observed increased tolerance in F1 offspring in hyperosmotic solutions of calcium chloride. However, there was no significant improvement of reproduction performance in bromide-containing solutions.Conclusions: Increased tolerance was associated with a redirection of resources from growth to maintenance and survival.

Rapid Customization and Manipulation Mechanism of Micro-Droplet Chip for 3D Cell Culture.

A full PDMS micro-droplet chip for 3D cell culture was prepared by using SLA light-curing 3D printing technology. This technology can quickly customize various chips required for experiments, saving time and capital costs for experiments. Moreover, an injection molding method was used to prepare the full PDMS chip, and the convex mold was prepared by light-curing 3D printing technology. Compared with the traditional preparation process of micro-droplet chips, the use of 3D printing technology to prepare micro-droplet chips can save manufacturing and time costs. The different ratios of PDMS substrate and cover sheet and the material for making the convex mold can improve the bonding strength and power of the micro-droplet chip. Use the prepared micro-droplet chip to carry out micro-droplet forming and manipulation experiments. Aimed to the performance of the full PDMS micro-droplet chip in biological culture was verified by using a solution such as chondrocyte suspension, and the control of the micro-droplet was achieved by controlling the flow rate of the dispersed phase and continuous phase. Experimental verification shows that the designed chip can meet the requirements of experiments, and it can be observed that the micro-droplets of sodium alginate and the calcium chloride solution are cross-linked into microspheres with three-dimensional (3D) structures. These microspheres are fixed on a biological scaffold made of calcium silicate and polyvinyl alcohol. Subsequently, the state of the cells after different time cultures was observed, and it was observed that the chondrocytes grew well in the microsphere droplets. The proposed method has fine control over the microenvironment and accurate droplet size manipulation provided by fluid flow compared to existing studies.

Adsorptive removal of crystal violet from wastewater using sodium alginate-gelatin-montmorillonite ternary composite microbeads

In this study, the performance of the montmorillonite-filled sodium alginate/gelatin (SA-GEL-MMT) ternary biocomposite microbeads on the adsorptive removal of crystal violet (CV) dye was investigated. Firstly, the composites containing different weight ratios of MMT such as 10 %, 15 %, and 20 % were prepared. The composite beads were cross-linked using a calcium chloride (3%wt/v) solution. To determine the optimum sorption conditions the studies were performed at different parameters namely temperature, pH, contact time, sorbent dose, and dye concentration. From the sorption studies, the maximum capacity of the microbeads was found as 1000.0 mg/g whereas the maximum removal of the dye was 92.1 % at pH = 7 and a temperature of 25 °C. Additionally, the kinetic studies showed that the sorption of the dye followed the pseudo-second-order kinetics. Moreover, the adsorptive removal of the dye occurs spontaneously. This study suggests that the use of SA-GEL-MMT can be highly effective and reusable for the treatment of wastewater.

Controlled Drug Release Using Chitosan-Alginate-Gentamicin Multi-Component Beads.

This study aimed to develop improved multi-component beads with controlled, sustained delivery of antibiotics, such as gentamicin (GM). Antibiotic-loaded beads with rapid-release and the sustained-release system can be used for bone restoration. Single and multi-component beads were prepared by gelation using various combinations of chitosan and calcium chloride as cationic components and alginate and citric acid as anions. GM release was also controlled by crosslinking using citric acid. The optimum beads were obtained using 5% or 2% sodium alginate, 3% chitosan, and 0.1 mol/L citric acid. The beads were characterized by FTIR, TG-DTG, swelling behavior, and SEM. All GM-loaded beads revealed good antimicrobial activity. The rate and kinetics of release in the phosphate buffer solution were controlled by changing the amount of chitosan in the calcium chloride solution and using citric acid as the crosslinking agent. Crosslinked beads were prepared for the release of about 80% of the loaded drug within 24 h. The study concluded that the chitosan-alginate beads provided faster GM release but crosslinking with citric acid was efficient for sustained-release beads containing gentamicin.

Lithium-Ion Battery Recycling: Metal Recovery from Electrolyte and Cathode Materials by Electrodialysis

The potential of electrodialysis to recycle spent lithium-ion batteries was assessed by investigating the recovery of lithium(I) from a synthetic solution representative of the aqueous effluent generated by shredding spent lithium-ion batteries underwater. Likewise, electrodialysis was tested for the selective recovery of lithium(I) towards cobalt(II), nickel(II) and manganese(II) from a synthetic solution representative of the leaching liquor of cathode materials. NMR spectroscopy showed that the implementation of electrodialysis to extract lithium from the aqueous effluent produced during battery shredding underwater should take into account the presence of HF generated by PF6− hydrolysis. In particular, it seems relevant to perform shredding under calcium chloride solution in order to precipitate fluoride and reduce HF generation. This work also showed that electrodialysis is an interesting technology for selectively recovering lithium from the leach solution of spent cathode materials, providing that divalent cations were previously removed to avoid metal precipitation inside the electrodialysis membranes. After removing cobalt(II) and nickel(II) at pH 2.8 and manganese(II) partially at pH 5.5 by using the ion exchange resin Dowex M4195, it is possible to extract and selectively concentrate lithium by electrodialysis without coextracting manganese(II) by using a lithium-selective membrane (faradic efficiency of 57.6%, permselectivity for lithium towards manganese of 6.9). Finally, a hybrid flowsheet implementing mineral processing and hydrometallurgy, including electrodialysis, ion exchange and crystallization stages, was proposed based on these results to reduce effluent generation and produce metal salts from spent lithium-ion battery.

Recovery of lithium from LiAlO2 in waste box sagger through sulfation to produce Li2SO4 and sequential wet conversion to Li3PO4, LiCl and Li2CO3

To supplement the increasing demand for lithium (Li) resources dictated by the growing market for lithium-ion batteries (LIBs), this study aimed to secure lithium carbonate (Li2CO3) using a waste box sagger generated from the process of manufacturing cathode materials for LIBs. Lithium was recovered through sulfation and subsequent wet conversion into high-purity Li2CO3. Lithium extractability (93%) from the waste box sagger powder was determined by the sulfation reaction using 5 M sulfuric acid (H2SO4) and distilled water (H2O) leaching of the resultant. The precipitation efficiency (85%) of Li into lithium phosphate (Li3PO4) in extracted Li solution was established using a sodium hydroxide (NaOH) and phosphoric acid (H3PO4) mixture. The maximum conversion efficiency (99%) of Li3PO4 to lithium chloride (LiCl) solution was calculated using a reflux method with calcium chloride (CaCl2) solution at a solid (g)/liquid (L) ratio of 100. The highest Li+ concentration reached 50,800 mg/L at a solid/liquid ratio of 400 and Cl/Li molar ratio of 0.95 in the range of tested conditions. Finally, high-purity Li2CO3 (99.8% in metal basis) was produced from the obtained Li solution through purification using NaOH, followed by carbonation using sodium carbonate (Na2CO3). The proposed method demonstrates the feasibility of securing a Li resource by recycling waste box sagger instead of disposing them as a designated waste.

Theophylline-Loaded Pectin/Chitosan Hydrochloride Submicron Particles Prepared by Spray Drying with a Continuous Feeding Ultrasonic Atomizer.

Pectin/chitosan hydrochloride (CHC) particles containing theophylline were prepared by a spray-drying apparatus coupled with a continuous feeding ultrasonic atomizer and a heating column. The formation of the submicron particles was investigated at various compositions of pectin solutions added with a chitosan hydrochloride or calcium chloride solution as a crosslinking agent. Scanning electron microscopic (SEM) images showed the pectin/chitosan hydrochloride particles had spherical and smooth surfaces. Depending on the feeding concentrations, the produced particles had diameters in the range of 300 to 800 nm with a narrow size distribution. Furthermore, the theophylline (TH)-loaded pectin/CHC particles were also prepared by the same apparatus. The TH release from the submicron particles in phosphate-buffered saline at 37 °C was monitored in real-time by a UV-Visible spectrophotometer. The Ritger-Peppas model could well describe the TH release profiles. All the diffusional exponents (n) of the release systems were greater than 0.7; thus, the transport mechanism was not a simple Fickian diffusion. Particularly, the n value was 1.14 for the TH-loaded particles at a pectin/CHC weight ratio of 5/2, which was very close to the zero-order drug delivery (n = 1). Therefore, the constant drug-release rate could be achieved by using the spray-dried pectin/CHC particles as the drug carrier.

Water and oil-resistant paper materials based on sodium alginate/hydroxypropyl methylcellulose/polyvinyl butyral/nano-silica with biodegradable and high barrier properties

Despite many technical challenges in the development of safe and environmentally friendly food packaging paper materials with excellent water and oil resistance using simple methods, producing paper-based functional materials using bio-based polymers is currently an important topic in the food packaging industry. In this study, novel water and oil-resistant coatings for the paper were developed through the combination of sodium alginate (SA), hydroxypropyl methylcellulose (HPMC), polyvinyl butyral (PVB), and hydrophobic silica nanoparticles (HSNPs). To impart oil-repellency to paper, SA and HPMC were first mixed uniformly and coated on the base paper, which was pre-treated with calcium chloride solution. A compact and tough coating layer was formed on paper due to the hydrogen bonding between SA and HPMC molecules, and the crosslinking between SA and Ca2+ ions in the base paper. High water resistance of the paper was achieved through the coating of PVB and HSNPs on top of the coating of SA/HPMC. The final coated paper demonstrated outstanding oil resistance (kit rating: 12/12), water resistance (Cobb value: 4.23 g/m2), low water vapor transmission rate (100 g/m2·24 h), and improved mechanical properties. This fluorine-free, and biodegradable barrier paper will find excellent applications in the food packaging industry.

Magneto-Mechanically Triggered Thick Films for Drug Delivery Micropumps.

Given the demanding use of controlled drug delivery systems, our attention was focused on developing a magnetic film that can be triggered in the presence of a magnetic field for both drug delivery and the actuating mechanism in micropump biomedical microelectromechanical systems (BioMEMS). Magnetic alginate films were fabricated in three steps: the co-precipitation of iron salts in an alkaline environment to obtain magnetite nanoparticles (Fe3O4), the mixing of the obtained nanoparticles with a sodium alginate solution containing glycerol as a plasticizer and folic acid as an active substance, and finally the casting of the final solution in a Petri dish followed by cross-linking with calcium chloride solution. Magnetite nanoparticles were incorporated in the alginate matrix because of the well-established biocompatibility of both materials, a property that would make the film convenient for implantable BioMEMS devices. The obtained film was analyzed in terms of its magnetic, structural, and morphological properties. To demonstrate the hypothesis that the magnetic field can be used to trigger drug release from the films, we studied the release profile in an aqueous medium (pH = 8) using a NdFeB magnet as a triggering factor.

Effect of calcium oxide nanoparticles produced from Lavetira critica leaf extract on the freshness of fresh‐sliced fruits

This study was piloted to assess the fusion of nanoparticles (LCCaNP) from leaf extract of Lavatera critica (LC) and calcium chloride and to observe their impact on the safety of fresh-sliced fruits and extend their shelf life. LCCaNP were synthesized by mixing calcium chloride and LC leaf extract, followed by the addition of sodium hydroxide. The quality of the produced LCCaNP was proven by conducting different physical and chemical tests. Fresh apples, strawberries, and guavas were independently immersed in diverse concentrated LCCaNP and 2% calcium chloride solution for 5 min. These treated sliced fruits were stuffed in polypropylene plastic bags and stored at 5°C. The total soluble solid content (TSS), pH, firmness, and weight reduction rate, 2,2-diphenylpicrylhydrazyl (DPPH), and sensory analysis were conducted for the total storage period of 25 days in a 5-day interval. LCCaNP and calcium chloride were proficient to preserve the fruits for up to 20 days. Our findings showed that LCCaNP-treated fresh-sliced fruits had an improved and enhanced shelf-life than control (nontreated) samples. In conclusion, the leaf of LC is an eventual source for the making of calcium oxide nanoparticles and could serve as an improved food conservation with proficiency to extend the fruit's shelf life for up to 20 days. Novelty impact statement For the first time had produced the natural LCCaNP from a natural plant of LC and evaluated its impact on the safety of fresh-sliced fruits. The natural nanosized LCCaNP is successfully produced by using the natural Ayurvedic plant of LC. LCCaNP acted as a better food preservative and had the capability to extend the shelf life of apples, strawberries, and guavas for up to 20 days without causing any side effects.

Influence of pre-harvest calcium applications on table olive characteristics during Spanish-style elaboration process

Calcium is largely used in the agri-food industry thanks to its positive effects, such as its preserving activity or its protection against pathogens. Post-harvest spraying of calcium chloride (CaCl2) solutions has demonstrated an increase in firmness and phenolic content. The aim of this research was to investigate the effects of pre-harvest applications of two CaCl2 concentrations (Ca 0.5% and Ca 1.0%) during the Spanish-style elaboration process at the beginning, middle, and end of the fermentation process. The analysis focussed on the Ca concentration in the whole fruit and in the different tissues (pulp, pit, and seed), as well as on the firmness, phenolic content, and antioxidant activity in the ‘Ascolana tenera’ table olive. An increased Ca concentration in the pulp (20.2 and 55.1%) and seed (13.4 and 36.5%) was observed during a monitoring period in which 0.5% and 1.0% CaCl2 concentrations, respectively, were compared with Ca 0% (water). No significant Ca increase was found in the pit. The fruit firmness was higher following the Ca treatments (22.8% and 68.3%, respectively), and a decrease in the contents of hydroxytyrosol, tyrosol, and verbascoside was observed during the elaboration process. The highest content of these phenols was found on the first date of monitoring for a 1.0% CaCl2 concentration. Hydroxytyrosol, oleuropein, and PB1 showed a significant difference on different monitoring dates. The antioxidant activity during the fermentation period rose between 63.3 and 87.2% compared with the Control (Ca 0%). A similar increasing trend was registered for the phenolic compounds. Our results are useful for the table olive sector to improve the handling in post-harvest processing and to increase the final quality of the olives.

Fabrication of sodium alginate-melamine@ZIF-67 composite hydrogel and its adsorption application for Pb(II) in wastewater.

A low-cost and environmental-friendly sodium alginate-melamine@zeolitic imidazolate framework-67 (SA-ME@ZIF-67) adsorbent was fabricated by chemical grafting and in situ growth for the removal of lead ions in wastewater. Firstly, melamine (ME) was grafted onto sodium alginate (SA) by amide reaction, and then SA-ME was dropped into a solution of calcium chloride to form hydrogel bead, and ZIF-67 was grown on the SA-ME hydrogel bead by the in situ growth method. The SA-ME@ZIF-67 adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The SA-ME@ZIF-67 adsorbent was used to effectively adsorb Pb(II) from aqueous solutions. The initial concentrations of lead ions, adsorbent dose, initial pH of lead ion solution, temperature, and adsorption time for the material were optimized. The adsorption isotherms and kinetics fitted to Langmuir isotherm model (R2 = 0.9281, 0.9420, and 0.9623 at the temperatures of 288.15K, 298.15K, and 308.15K, respectively) and pseudo-second-order kinetic model (R2 = 0.9901) respectively. According to the Langmuir model at 308.15K, the maximum adsorption capacity of the adsorbent for Pb(II) was 634.99mg/g. The recycling application of the adsorbent was possible as it was easily collected and reused after five adsorption-regeneration cycles. In addition, the Pb(II) in real wastewater samples has been efficiently removed using the fabricated hydrogel. The results showed that the SA-ME@ZIF-67 adsorbent had high adsorption capacity, removal efficiency, and easy recyclability for Pb(II).

A new separation approach of amylose fraction from gelatinized high amylose corn starch

This work aimed at developing a new method to separate amylose from high amylose corn starch (HACS) with calcium chloride (CaCl 2 ) solution. The prepared amylose C was compared with the amylose N obtained with traditional sodium hydroxide (NaOH) solution. Although the extraction rate of purified amylose C (55.42 ± 0.53%) was slightly lower than that of purified amylose N (61.17 ± 0.60%), high performance size exclusion chromatography (HPSEC-MALLS-RI) patterns showed that it had higher purity. X-ray diffraction (XRD) and differential scanning calorimeter (DSC) results indicated that amylose C had more ordered and compact structure. In addition, the reagent solution consumption of amylose C was only about 30% of amylose N. • A new method of separating amylose with calcium chloride solution was established. • The purity of the amylose separated by calcium chloride solution was higher. • The method consumed smaller volume of water.

Organic Pollutant Biodegradation by an Immobilized Mixed Bacterial Culture

Pollution of organic compounds in rivers is generally contributed by wastewater discharge from human activities e.g. untreated black- & greywater, livestock farming, and industry. Without proper control of this waste generation, the river ecosystem will suffer if just rely on its self-purification and dilution by natural runoff to reduce the downstream effect. This research aimed to treat organic wastewater with an immobilized mixed bacterial culture. Immobilization was carried out using calcium alginate in a form of macrocapsule/beads, allowing the degrader microbe to be entrapped in its matrix thus preventing it from washout from the system. 3% (w/v) sodium alginate was mixed with 5 mg (dry) mixed culture and dropwise on 4% (w/v) calcium chloride solution. The results showed that immobilized microbes were still able to grow despite being entangled in a calcium alginate matrix with an initial growth of 6.1 x 105 to 7.4 x 107 colonies/grams and reduced COD content up to 68.3%. Degrader microbe immobilization offers considerable advantages compared to free/ suspended cell system due to the influence of river water flow.

Effect of Calcium Chloride on the Chemical Properties of the Refrigerated Fruits of the Apple Variety Golden Delicious

This study aims to identify the possibility of using calcium chloride solutions to maintain the best quality of the fruits of the Golden Delicious apple variety stored in cold storage and grown under the conditions of the AL-Marj region in Libya. It was conducted during the 2017 and 2018 planting seasons, and the treatments included spraying with two concentrations of calcium chloride, namely (0% and 0.06%) where the first spray was a month after the peak of flowering, and the spraying was repeated three times, one spray every 30 days, after harvesting, the fruits were immersed before storage in calcium chloride solutions at concentrations of (0%, 2%, 4%, 6%) and stored for (120 days) at a temperature of zero Celsius. The obtained results showed that the use of calcium chloride sprayed on the fruits better preserved their quality compared to the non-sprayed ones. The immersion in calcium chloride solutions also preserved the quality of the fruits by increasing its concentration within the limits of the concentrations included in this study, which makes us conclude the important role of calcium chloride in maintaining the quality of the fruits of this variety.

Synthesis of Alginate/Hydroxyapatite Beads for Acetaminophen Delivery

Conventional drug delivery systems usually involve the intake of multiple drugs, which could amplify the risk of overdosing. Acetaminophen is a widely used pain relief substance that is prone to accidental overdosing. Hence, a controlled drug delivery system is needed to ensure its efficacy. A nanocomposite hydroxyapatite/alginate system that was used as a drug carrier for acetaminophen was synthesized through the sol-gel method, and the mechanism underlying its controlled drug delivery was investigated. Spherical nanocomposite bead samples were synthesized by incorporating 5 wt%, 10 wt%, and 15 wt% hydroxyapatite into mixtures containing alginate. The mixtures were then dropped into calcium chloride solution. The phase purity of the hydroxyapatite sample was confirmed through X-ray diffraction, and the functional groups that confirmed the presence of alginate and hydroxyapatite in the nanocomposite samples were analyzed by using Fourier transform infrared spectroscopy. The release of acetaminophen can be controlled for 48 h, and the Korsmeyer–Peppas kinetics model showed the best correlation for all samples. The kinetics of Al/HAp5, Al/HAp10, and Al/HAp15 were governed by quasi-Fickian diffusion with the n values of 0.199, 0.238, and 0.225, respectively. The composite beads show potential for application as a controlled drug delivery vehicle.

SEED PRIMING EFFECTS ON MORPHOLOGICAL TRAITS OF AMARANTHUS HYPOCHONDRIACUS UNDER OPTIMAL AND LOW TEMPERATURES

The recent research evaluated the effects of growth stimulant seed treatment on the morphological traits of Amaranthus hypochondriacus L. cv. ‘Krepysh’ grown under optimal and low positive temperature conditions. The seeds were continuously soaked for 4 h in five different solutions of growth stimulants, i.e., salicylic acid (SAA - 138 mg/L), hydrogen peroxide (H2O2 - 10 and 50 mmol/L), calcium chloride (CaCl2 - 3000 mg/L), succinic acid (SUA - 500 mg/L), and control (distilled water). The stimulant-primed seeds were germinated at optimal temperature (23°C) and continued to germinate at low temperatures of 10°C (T10) and 23°C (T23). The results showed that seed germination rates viz., germination potential (GP), germination rate (GR), germination index (GI), viability index (VI), and seed vigor index (SVI), were significantly improved with seed quality potential compared with the control. Under low positive temperature, seeds treated with succinic acid, H2O2, and CaCl2 had the most significant effects on improving seed quality and induced cold resistance in the seeds. The morphological indicators of amaranth seedlings, i.e., biomass, hypocotyl, and root length, were also significantly improved with seed treatment by growth stimulants. Priming of amaranth seeds with hydrogen peroxide and succinic acid showed a greater increase in seedlings’ biomass at room (23°C) and low (10°C) temperatures. The seed treatment with SUA and SAA significantly contributed to enhancing the hypocotyl length. The amaranth roots achieved maximum length after seed treatment with SUA and CaCl2. In general, the seed treatment effects on seedling's biomass under chilling stress were associated with the potential of inducing cold tolerance in seedlings.