scholarly journals Application of Some Natural Porous Raw Materials for Removal of Lead and Zinc from Aqueous Solutions

10.5772/62347 ◽  
2016 ◽  
Author(s):  
Mirjana Golomeova ◽  
Afrodita Zendelska
Keyword(s):  
Aqueous Solutions ◽  
Raw Materials ◽  
Lead And Zinc

scholarly journals A new approach to biomining: Bioengineering surfaces for metal recovery from aqueous solutions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jesica Urbina ◽  
Advait Patil ◽  
Kosuke Fujishima ◽  
Ivan G. Paulino-Lima ◽  
Chad Saltikov ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Metal Binding ◽  
Raw Materials ◽  
Extraction Methods ◽  
Metal Recovery ◽  
Consumer Electronics ◽  
Metal Extraction ◽  
Copper Binding ◽  
Metal Binding Peptides ◽  
Binding Peptides

Abstract Electronics waste production has been fueled by economic growth and the demand for faster, more efficient consumer electronics. The glass and metals in end-of-life electronics components can be reused or recycled; however, conventional extraction methods rely on energy-intensive processes that are inefficient when applied to recycling e-waste that contains mixed materials and small amounts of metals. To make e-waste recycling economically viable and competitive with obtaining raw materials, recovery methods that lower the cost of metal reclamation and minimize environmental impact need to be developed. Microbial surface adsorption can aid in metal recovery with lower costs and energy requirements than traditional metal-extraction approaches. We introduce a novel method for metal recovery by utilizing metal-binding peptides to functionalize fungal mycelia and enhance metal recovery from aqueous solutions such as those found in bioremediation or biomining processes. Using copper-binding as a proof-of-concept, we compared binding parameters between natural motifs and those derived in silico, and found comparable binding affinity and specificity for Cu. We then combined metal-binding peptides with chitin-binding domains to functionalize a mycelium-based filter to enhance metal recovery from a Cu-rich solution. This finding suggests that engineered peptides could be used to functionalize biological surfaces to recover metals of economic interest and allow for metal recovery from metal-rich effluent with a low environmental footprint, at ambient temperatures, and under circumneutral pH.

Peculiarities of Dispersion of Oil Raw Materials into Aqueous Solutions of Polycomplexones Surfactants

2020 ◽  
Vol 56 (1) ◽  
pp. 124-128 ◽  
Author(s):  
A. YU Tsivadze ◽  
A. YA. Fridman ◽  
B. P. Tumanyan ◽  
A. L. Maksimov ◽  
A. K. Novikov ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Raw Materials

Study of Nano-Hydroxyapatite Adsorption in Heavy Metals

2013 ◽  
Vol 777 ◽  
pp. 15-18 ◽  
Author(s):  
Jiu Xu Liu ◽  
Feng Wang ◽  
Jian Xing Shen ◽  
Qi Hui Lai ◽  
Ying Gai
Keyword(s):  
Aqueous Solutions ◽  
Inductively Coupled Plasma ◽  
Raw Materials ◽  
Calcium Nitrate ◽  
Precipitation Method ◽  
Calcium Nitrate Tetrahydrate ◽  
X Ray Diffraction ◽  
Absorption Function ◽  
Inductively Coupled ◽  
Nitrate Tetrahydrate

nanohydroxyapatite (nanoHA) powders were prepared by liquid phase precipitation method, using diammonium hydrogen phosphate and calcium nitrate tetrahydrate as raw materials. It was studied that the prepared nanoHA powders not sintered and sintered at 800°C to adsorption of Cu2+ and Pb2+ in aqueous solutions, respectively. The structure and size of nanoHA powders was investigated by X-ray diffraction (XRD) and the concentrations of Cu2+and Pb2+ in aqueous solutions were tested by inductively coupled plasma emission spectrometer. The results revealed that the nanoHA powders have obvious absorption function for Cu2+ and Pb2+ in aqueous solutions. In addition, the absorption ratio was affected by the size of nanoHA.

Lead and zinc removal from aqueous solutions by aminotriphosphonate-modified converted natural phosphates

2012 ◽  
Vol 211-212 ◽  
pp. 233-239 ◽  
Author(s):  
S. Saoiabi ◽  
S. El Asri ◽  
A. Laghzizil ◽  
A. Saoiabi ◽  
J.L. Ackerman ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Zinc Removal ◽  
Lead And Zinc

Analysis on Pb, Cd, Cr, As, Mn Emission and Control Technology of Typical Industries

2012 ◽  
Vol 610-613 ◽  
pp. 1176-1187 ◽  
Author(s):  
Tao Yue ◽  
Fan Wang ◽  
Bin Jie Han ◽  
Peng Lai Zuo ◽  
Fan Zhang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Flue Gas ◽  
Power Plants ◽  
Raw Materials ◽  
Control Technology ◽  
Generator System ◽  
Lead And Zinc ◽  
Metal Contents ◽  
Industrial Boilers

The heavy metals including Pb, Cd, Cr, As and Mn emission characteristics of coal-fired power plant boilers, industrial boilers, lead and zinc smelters, cement kilns, and steel industries were studied in this paper. The removing effects of heavy metals by pollution control technology were analyzed. ICP-AES method was used to measure the contents of heavy metals in solid samples. In addition, M-29, the U.S. EPA isokinetic sampling method was used to sample heavy metals in the flue gas, and the sampled heavy metals were tested by ICP-AES-hydride generator system. For coal-fired boilers, heavy metal contents in descending order were Mn, Pb and Cd in the tested coal. The heavy metals’ emission concentrations of coal-fired industrial boilers were much higher than the heavy metals’ emission concentrations of power plants. For the lead and zinc smelters, Pb and its compounds in flue gas after cleaning can meet the emission standards. The heavy metal contents in the cement raw materials in descending order were Pb, Cr and Cd. For the sintering mixture, the heavy metal contents in descending order were Pb, Cr and Cd as well. The removal effects of heavy metals by existing pollutant control technologies in the various typical industries were also tested and analyzed in the paper. The research did in the paper made a scientific basis for controlling heavy metal emissions from typical industries.

scholarly journals THE EFFECT OF STORAGE CONDITIONS ON THE PROPERTIES OF AQUEOUS SOLUTIONS OF CARBOXYMETHYLATED PLANT MATERIALS

2018 ◽  
pp. 309-317 ◽  
Author(s):  
Елена (Yelena) Владимировна (Vladimirovna) Калюта (Kalyuta) ◽  
Вадим (Vadim) Иванович (Ivanovich) Маркин (Markin) ◽  
Михаил (Mikhail) Ильич (Il'ich) Мальцев (Mal'tsev)
Keyword(s):  
Plant Growth ◽  
Aqueous Solutions ◽  
Agricultural Production ◽  
Raw Materials ◽  
Storage Conditions ◽  
Freezing And Thawing ◽  
Plant Materials ◽  
Plant Raw Materials ◽  
Urgent Task ◽  
Vegetable Raw Materials

The development of new plant growth regulators based on products of chemical processing of plant raw materials is currently an urgent task for increasing yields in agricultural production. On the basis of carboxymethylated plant materials, "Eco-Stim" plant growth regulator has been developed. The purpose of this work is to study the effect of the storage conditions of solutions of carboxymethylated plant materials in "Eco-Stim" as part of the preparation on their rheological and growth-regulating properties. The rheological properties of the aqueous systems of carboxymethylated pine, sunflower, and oat chaff have been studied at concentrations of 0.2–15%. It is established that the change in viscosity as a result of the shear rate of the systems studied is more complex in comparison with aqueous solutions of Na-CMC. Storage of solutions of carboxymethylated vegetable raw materials for 20 months, as well as the processes of freezing and thawing for 6–9 weeks have practically no effect on the viscosity and growth regulating properties of carboxymethylated vegetable raw materials. The studied systems make it possible to increase the germination of wheat seeds Omskaya-36 to 80–87% and to increase the length of the root by 4–10 times and the stem by 1.5–2 times compared to the control.

scholarly journals Effectiveness of lactate-containing processing aids application in vegetable treatment

2019 ◽  
Vol 48 (2) ◽  
pp. 28-35
Author(s):  
Вера Евелева ◽  
Vera Eveleva ◽  
Татьяна Черпалова ◽  
Tatyana Cherpalova ◽  
Елена Шиповская ◽  
...  
Keyword(s):  
Surface Tension ◽  
Aqueous Solutions ◽  
Storage Stability ◽  
Raw Materials ◽  
Physical Parameters ◽  
Air Interface ◽  
Deep Layers ◽  
New Processing ◽  
Vegetable Raw Materials ◽  
Processing Aids

Common characteristic of salad products is presence of cut raw vegetables in its composition. Cold cutting helps surface microorganisms penetrate into deep layers of the product. Hygienic cleanliness of raw ingredients is the major factor which contributes to storage stability of salad products. One of the most effective methods that helps enhance salad storage stability is initial treatment of vegetable raw materials with antimicrobial solutions. The author presents information on using solutions of hydrogen peroxide and peroxyacetic acid, sodium hypochlorite and compositions containing peroxide compounds and acetic, benzoic, sorbic, ascorbic, citric, lactic and other acids as well as their salts and containing guanidylic compounds. The article reveals that antimicrobial action of lactate-containing processing aids improves sufficiently if polymer cation-active compounds are introduced into their composition. The goal of the research is to study application effectiveness of new processing aids for treatment of raw peeled cut vegetables to reduce bacterial content and enhance storage stability before thermal treatment (boiling). The author tested the aids based on lactate-containing components. Physicochemical and physical parameters of the aids and their aqueous solutions are the following: active acidity (pH), titratab6le acidity, water and volatiles mass fraction, dynamic viscosity, surface tension. The article presents the data which characterize change in surface tension of aqueous solutions of the aids at the water-air interface depending on their concentration. It also gives quality indicators and microbial parameters of raw peeled cut vegetables after their processing with solutions of the aids. It was found out that treatment of raw peeled cut vegetables with processing aids based on lactate containing components prolongs their shelf life from 3 hours according to the applicable technology up to 48 hours.

scholarly journals REMOVAL OF LEAD (Pb ) AND ZINC (Zn ) FROM AQUEOUS SOLUTIONS BY ADSORPTION ON VERMICULITE FROM ASKOS AREA IN MACEDONIA (NORTHERN GREECE).

2018 ◽  
Vol 36 (1) ◽  
pp. 182
Author(s):  
A. Bourliva ◽  
K. Michailidis ◽  
C. Sikalidis ◽  
G. Trontsios
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Low Cost ◽  
High Capacity ◽  
Freundlich Isotherm ◽  
Batch Adsorption ◽  
Northern Greece ◽  
Batch Type ◽  
Zinc Removal ◽  
Lead And Zinc

The lead and zinc removal from their aqueous solutions by vermiculite samples from Askos area, Northern Greece, was studied using a batch type method. Askos vermiculite is mainly consisted of mixed-layer phyllosilicates. A standard vermiculite sample from Kent, Connecticut was also used for comparison reasons. The concentration of the solutions used varied between 100 and 2000mg/L The maximum uptake capacity of the Askos vermiculite for lead and zinc was found to reach 95% and 96% from solutions containing 100mg/L, respectively. Much lower uptake capacities: 37% for lead and 76% for zinc were found for the Kent vermiculite. The experimental results showed that the Askos vermiculite exhibited an acceptable high capacity for removing metal ions from aqueous solutions. Thus, this untreated and low-cost mineral can find use in purifying heavy metal wastewaters. The uptake distribution coefficient (Kd) showed that the relative lead and zinc removal is higher for initial concentrations below 1000mg/L Batch adsorption experiments conducted at room temperature (22±1°C) showed that the adsorption patterns followed the Freundlich isotherm model. The heavy metal (Pb2+, Zn2+) removal is a rather complicated phenomenon related both to the aqueous chemistry of the elements and the interaction of their cationic species with the used materials. The removal procedure can be attributed to different processes such as ion exchange, adsorption, and precipitation.

scholarly journals On the strategy of utilization of resources of nonferrous metals in the far eastern region

2018 ◽  
Vol 56 ◽  
pp. 04009
Author(s):  
Gennady Arkhipov
Keyword(s):  
Raw Materials ◽  
Practical Importance ◽  
Far East ◽  
Nonferrous Metals ◽  
Current Status ◽  
Eastern Region ◽  
East Region ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
Far Eastern

Analysis of current status and use of lead and zinc resources in the Far Eastern region, on the territory of Primorsky region for many decades and such analysis is of practical importance for evaluation and selection of areas in this field of activity. Russia safeguarded stocks and lead and zinc resources in the long term. On the territory of the Far East region there are significant deposits of these metals, but for single resources most of them substantially less large deposits in other regions of Russia - Siberia, Altai, Ural. Significantly to support lead-zinc industry in the region is possible in case of exploration of new deposits of ores with high quality. Lead and zinc minerals industrial scale in the region undoubtedly has and can be represented by a leading geological-industrial types of fields, but there is currently little studied. You must not reforming the present state of the industry and its innovative development: need to develop intra-regional use of raw materials in the form of the final product, that will give the region's resources development of new incentives. Nonferrous metals resource potential of the region, with an effective strategy to use them can be a significant factor in changing the geopolitical significance of the far eastern part of Russia.

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