Industrial Water Treatment Research Articles

Treatment of Industrial Water by Nano Technology

Nanotechnology: - It is one of the modern scientific achievements where nanotechnology isavailable, namely the engineering and art of nano scale material treatment (100 nanometers.The ability to manufacture new Nano materials used to treat surface water, groundwater andindustrial wastewater contaminated with toxic metal ions, organic and inorganic substances as wellas microorganisms.In this research, we discussed the use of Nano materials, or nearby, to remove the dissolved oilpollutants from the industrial wastewater of the South Refinery Company, where we used multitubesof carbon nanotubes. The function of the tubes can be described as a particle filter, Hold largeparticles of contaminants that are difficult to pass through the tube tunnel). We also used activatedcarbon powder and carbon filters near pore nanoparticles

MoS2-based membranes in water treatment and purification

• This paper reviewed state-of-art of MoS2-based membranes in water treatment. • MoS2nanoporous, layer-stacked and composite membranes were summarized. • Desalination, industrial water treatment, antifouling properties were discussed. Membrane separation technologies have proven viable in tackling the issues of water pollution and shortage of freshwater resources with practical applications. Two-dimensional (2D) materials with thickness of one to a few atoms stand out as desirable building blocks to design and fabricate membranes with outstanding performances. Molybdenum disulfide (MoS 2 ), as a promising alternative 2D material, has been currently one of the most intriguing 2D materials beyond graphene due to many excellent physicochemical, mechanical and biological properties, which are not available in graphene-based nanomaterials. However, to the best of our knowledge, there has been few reviews of MoS 2 -based membranes studies. It is thus urgently needed to summarize key findings of MoS 2 -based membranes and assess the current research studies in this area. This paper attempts to critically review the present state-of-the-art of MoS 2 -based membranes in water treatment and purification. Firstly, we briefly introduce the main preparation methods of MoS 2 nanosheets, which are often applied in fabricating membranes. Next, the design and fabrication of MoS 2 -based membranes are systematically summarized in terms of nanoporous membranes, layer-stacked membranes, MoS 2 composite membranes including MoS 2 -incorporated membranes, and membranes surface modification with MoS 2 . Then, we critically review the recent advancement about applications of MoS 2 -based membranes for water treatment and purification, focusing on desalination, industrial wastewater treatment, and antifouling properties. Finally, we discuss the existing challenges, future research efforts and opportunities of MoS 2 -based membranes. This work will be very valuable to understand the current state-of-the-art of MoS 2 -based membranes and will be helpful for developing other 2D-based membranes for efficient and low-energy-consumption in water treatment and purification.

The production and treatment of industrial waste water

With the acceleration of industrialization in China, the quantity and scale of industrial waste water will continue to increase, and higher requirements will be put forward for the treatment of industrial waste water. This paper aims to analyze the current situation of industrial waste water production, summarize the problems in the process of waste water treatment, and provide measures to improve the quality of industrial waste water treatment based on the actual situation, so as to provide reference for similar research. At present, the rapid development of China’s industrial industry, the continuous increase of industrial economic scale, promote the rapid development of the national economy, resulting in varying degrees of environmental pollution. In fact, many industrial enterprises pay more attention to efficiency than waste water treatment, or directly discharge waste water that does not meet environmental standards, which directly affects people’s normal life and destroys the original ecological balance. Through the powerful industrial waste water treatment, has the practical significance.

Overview on the role of heavy metals tolerance on developing antibiotic resistance in both Gram-negative and Gram-positive bacteria.

Environmental health is a critical concern, continuously contaminated by physical and biological components (viz., anthropogenic activity), which adversely affect on biodiversity, ecosystems and human health. Nonetheless, environmental pollution has great impact on microbial communities, especially bacteria, which try to evolve in changing environment. For instance, during the course of adaptation, bacteria easily become resistance to antibiotics and heavy metals. Antibiotic resistance genes are now one of the most vital pollutants, provided as a source of frequent horizontal gene transfer. In this review, the environmental cause of multidrug resistance (MDR) that was supposed to be driven by either heavy metals or combination of environmental factors was essentially reviewed, especially focussed on the correlation between accumulation of heavy metals and development of MDR by bacteria. This kind of correlation was seemed to be non-significant, i.e. paradoxical. Gram-positive bacteria accumulating much of toxic heavy metal (i.e. highly stress tolerance) were unlikely to become MDR, whereas Gram-negative bacteria that often avoid accumulation of toxic heavy metal by efflux pump systems were come out to be more prone to MDR. So far, other than antibiotic contaminant, no such available data strongly support the direct influence of heavy metals in bacterial evolution of MDR; combinations of factors may drive the evolution of antibiotic resistance. Therefore, Gram-positive bacteria are most likely to be an efficient member in treatment of industrial waste water, especially in the removal of heavy metals, perhaps inducing the less chance of antibiotic resistance pollution in the environment.

Evoqua expands in high-purity water treatment

Evoqua Water Technologies has acquired Water Consulting Specialists Inc (WCSI), a privately-held US company that designs, manufactures and services industrial high-purity water treatment systems.

Efficient sorption performance of carbon-diatomaceous silica compounds towards phenol

Phenol removal as organic pollutant model has been studied on new composite adsorbents prepared from carbon and natural diatomaceous silica mixtures in different proportions (KCp1, KCp2, and KCp3 with 10, 20, and 30% of carbonaceous matter, respectively). SEM observations clearly showed the porous aspect evolution when mixing carbon with the macroporous diatomite skeleton, further proved by TEM images that revealed a co-existence of two distinct pore sizes. FTIR and XRD characterization mainly demonstrated the disappearance of calcium carbonate species as consequence of the undertaken treatments in presence of carbon. N2 sorption analysis at 77 K confirmed the obtaining of more developed textural properties with enhanced BET surfaces, and the creation of narrower porosity. The best area was obtained for KCp3 (336 m2/g) as compared to the starting carbon and diatomite surfaces (118 and 8 m2/g, respectively). The influence of several parameters such as contact time, temperature, pH, and initial concentration on the performance of the resultant materials in terms of phenol adsorption was investigated. The pH ≤ 8 favored the phenol removal, whereas the temperature did not have a great impact in the selected range (30-60°C). The sorption isotherms followed well the Freundlich and, more accurately, Langmuir models with the highest adsorption capacity recorded for KCp3 (98.5 mg.g−1). A fast kinetic was revealed whose data best fitted with the pseudo-second-order model with a correlation factors values of R2=0.996, 0.999, and 0.992 for KCp1, KCp2, and KCp3 respectively. More than 50% of the maximum adsorption ratio was achieved in half the time needed for saturation. The new composites offer promising prospects as inexpensive sorbents for use with competitive capacities in the industrial water treatment.

Conversion of Fe-bearing minerals in sludge to nanorod erdite for real electroplating wastewater treatment: Comparative study between ferrihydrite, hematite, magnetite, and troilite

Ferrihydrite, hematite, magnetite and troilite are typical Fe-bearing minerals, and served as major components of Fe-rich sludges generated in water treatment, refining, steel processing and mining industry, respectively. To recycle such Fe-rich sludges to prepare erdite-bearing flocculant, the phase transformation of the four Fe-bearing minerals to nanorod erdite should be clarified. In the study, the four minerals were hydrothermal treated to prepare nanorod erdite separately by simply adding Na2S and NaOH. Among the four minerals, ferrihydrite was weakly crystallized and easily converted to nanorod erdite with diameter of 200–500 nm and length of 2–5 μm, along with dotted distribution of hematite as byproduct. Only a small portion of hematite was involved in the formation of nanorod erdite with length of 2 μm, but the involvement of magnetite and troilite in erdite formation did not occur. The Fe dissolution from Fe-bearing minerals in alkaline solution was a key step for erdite crystallization, which apparently enhanced at high NaOH concentration. By increasing NaOH concentrations from 1 to 6 M, radial growth of nanorod erdite from both ferrihydrite and hematite steadily improved to 5–10 μm and 5 μm, separately. Fer-P, the product of ferrihydrite, contained plenty of nanorod erdite and exhibited remarkable removal efficiency of Cr, Cu and Zn from real electroplating wastewater. By adding 0.5 g Fer-P, the removal percentage of Cr, Cu and Zn were all more than 99.95%, which were higher than other conventional reagents such as polyaluminium chloride, polyferric sulfate, powder activated carbon, and diatomite. The total residual heavy metal concentrations were less than 0.1 mg/L, which met the standard of discharging electroplating-wastewater of China. Nanorod erdite was spontaneously hydrolyzed to generate Fe/S-bearing colloid, which contained abundant Fe–S–H groups for chelating heavy metals in comparison with ligands in electroplating wastewater, maintaining the residual heavy metals at low level. In summary, rather than magnetite/troilite-rich sludge, ferrihydrite/hematite-rich sludge can be served as desirable resources to prepare erdite-bearing flocculant for real electroplating wastewater treatment.

Ground water toxicity due to fluoride contamination in Southwestern Lahore, Punjab, Pakistan

Abstract The prevalence of dental/bone deformities provides motivation for studying the distribution, severity and sources of the Fluoride (F−1). The ground water samples (n = 77) were collected, from the districts of Lahore and Kasur of approximately 750 km2 area. The water was analyzed for fluoride (F−), pH, electric conductivity (EC), alkalinity and hardness. The results revealed F− concentration ranges from 0.25–21.3 mg. An inverse relation between depth and fluoride concentration was observed. On the basis of cluster analysis three zones were identified. Highly toxic zone was a strip of 15 km wide and 3 km long, along Multan Road from Sunder to Phool Nagar bypass, with fluoride concentration (08–21.3 mg/L). The highly toxic zone inhabited a number of industrial units, disposing off their wastewater through soaking pits. These units contribute pollution to the shallow water, which further penetrates to the surroundings. Hence the shallow water (depth of 45–50 feet) was the most contaminated. The intensity of toxic effects decreases from highly to mild toxic zone. It was concluded that the problem was actually associated with the industrial wastewater. Therefore, to overcome the issue, measures of supplying fresh drinking water from the deep aquifer as well as treatment of industrial water is suggested. HIGHLIGHT Industry was actually responsible for fluoride toxicity in the region rather than natural sources.

‘Domain-specific’ patent analytics: Focus on company's technology priorities

This paper aims to depict a new usage of patent analytics on a corporate level mitigating the gap between strategy (technology policy making) and operational activities (R&D program development and actualisation).The approach proposed for such mitigation is based on three techniques enriching patent analytics practical implementation:1) knowledge modelling techniques;2) deep technical analysis based on knowledge model;3) ‘insight-driven analytics’ approach.Such three techniques aim to facilitate the implementation of PL in the company's technology management processes.The paper contains examples related to oil & gas, transport, and water treatment industries.

Simulations of anthropogenic bromoform indicate high emissions at the coast of East Asia

Abstract. Bromoform is the major by-product from chlorination of cooling water in coastal power plants. The number of power plants in East and Southeast Asian economies has increased rapidly, exceeding mean global growth. Bottom-up estimates of bromoform emissions based on few measurements appear to under-represent the industrial sources of bromoform from East Asia. Using oceanic Lagrangian analyses, we assess the amount of bromoform produced from power plant cooling-water treatment in East and Southeast Asia. The spread of bromoform is simulated as passive particles that are advected using the three-dimensional velocity fields over the years 2005/2006 from the high-resolution NEMO-ORCA0083 ocean general circulation model. Simulations are run for three scenarios with varying initial bromoform concentrations based on the range of bromoform measurements in cooling-water discharge. Comparing the modelled anthropogenic bromoform to in situ observations in the surface ocean and atmosphere, the two lower scenarios show the best agreement, suggesting initial bromoform concentrations in cooling water to be around 20–60 µg L−1. Based on these two scenarios, the model produces elevated bromoform in coastal waters of East Asia with average concentrations of 23 and 68 pmol L−1 and maximum values in the Yellow Sea, Sea of Japan and East China Sea. The industrially produced bromoform is quickly emitted into the atmosphere with average air–sea flux of 3.1 and 9.1 nmolm-2h-1, respectively. Atmospheric abundances of anthropogenic bromoform are derived from simulations with the Lagrangian particle dispersion model FLEXPART based on ERA-Interim wind fields in 2016. In the marine boundary layer of East Asia, the FLEXPART simulations show mean anthropogenic bromoform mixing ratios of 0.4–1.3 ppt, which are 2–6 times larger compared to the climatological bromoform estimate. During boreal winter, the simulations show that some part of the anthropogenic bromoform is transported by the northeasterly winter monsoon towards the tropical regions, whereas during boreal summer anthropogenic bromoform is confined to the Northern Hemisphere subtropics. Convective events in the tropics entrain an additional 0.04–0.05 ppt of anthropogenic bromoform into the stratosphere, averaged over tropical Southeast Asia. In our simulations, only about 10 % of anthropogenic bromoform is outgassed from power plants located in the tropics south of 20∘ N, so that only a small fraction of the anthropogenic bromoform reaches the stratosphere. We conclude that bromoform from cooling-water treatment in East Asia is a significant source of atmospheric bromine and might be responsible for annual emissions of 100–300 Mmol of Br in this region. These anthropogenic bromoform sources from industrial water treatment might be a missing factor in global flux estimates of organic bromine. While the current emissions of industrial bromoform provide a significant contribution to regional tropospheric budgets, they provide only a minor contribution to the stratospheric bromine budget of 0.24–0.30 ppt of Br.

Study on Design and Analysis of Industrial Y Type Strainer

Industrial Strainers are widely being used in Various Heavy Mechanical Industries such as Petro Chemical, Oil and Gas, Steel industry, Water Treatment and Process Industries. The Main purpose being Removal of unwanted Materials in pipelines is a never ending one. Whether the Flowing Material as Sea Water, Oil, Paint or variety of Food or Chemical products. The cause of damage might be dirt, foreign matter or even Clamps of the Product. The Main widely used Industrial Strainers are Basket, Magnetic, Duplex, Y-Type, Tee type and conical strainer. The material used in overall Manufacturing of the Different Strainers is MS (Mild Steel), SS (Stainless Steel). The most efficient of all the strainers Duplex Strainer, because of its large design ratio and larger Material Handling Capacity. The Main Purpose of this Research is to Study Design and Materials involved in the manufacturing of Y-Type are being mainly used in the fluid pipelines in order to Filter Out the impurities, Foreign Particles and protect the downstream.

Review on natural clay ceramic membrane: Fabrication and application in water and wastewater treatment

Membrane technology is important in industrial wastewater and water treatment. Recently, the polymeric membrane technology is widely chosen in these applications. However, they are lowtemperature ranges, low corrosion resistance, and low lifespan. Thus, researchers are actively trying to develop a better membrane technology such as natural clay ceramic membrane due to their excellent in chemical, mechanical and thermal resistance, high-pressure application and long lifespan. This detailed review compiles through the literature of current scientific research over the last ten years. Its highlights the key findings of factors in the fabrication of natural clay ceramic membrane that contributed to its properties. This review article presented an outline of the advantages, disadvantages, and how to overcome the disadvantages, structure, and preparation of ceramic membrane, including method, raw materials, drying and sintering temperature. The review confirmed that the sintering temperature, the composition of raw materials and pore-forming agent are significantly enhanced the mechanical strength and porosity of the natural clay ceramic membrane. However, further development and modification of the natural clay ceramic membrane technology and their applications to treat different environmental pollutants is still necessary.

Distribution and environmental risk assessment of trace metals in sludge from multiple sources in Taiwan

ABSTRACT: This study evaluated the level of the contaminant of the heavy metals in sludge from different sources and the ecological risk criteria associated with it was also analyzed to establish its reuse in agriculture. The sludge samples were collected from the water plant (WTP), wastewater treatment plant (WWTP), and industrial water treatment plant (IPT) in Taiwan. The inductively coupled plasma mass spectrometry was used to measure the trace metals in sludge. The pollution level and ecological risk criteria for heavy metals in sludge were also used to evaluate its reuse in agriculture. The result shows the average concentrations of trace metals in sludge for three groups (WTP, WWTP, and ITP). Significant correlations were found between concentrations of Zn-Ag (p < 0.001). The higher values of I geo showed in ITP, indicated Hg to be a major pollutant. In Taiwan, the regulations did not establish the reuse of sludge in agriculture. However, the concentration level of trace metals in sludge was particularly lower than the regular levels in most groups, like WTP and WWTP groups. The industrial sludge was not recommended for the use in agriculture. The results of this study can be used for regular monitoring to establish a reference for sludge management and application to agriculture.

Excellent Photocatalytic degradation of Methylene Blue, Rhodamine B and Methyl Orange dyes by Ag-ZnO nanocomposite under natural sunlight irradiation

Highly efficient silver assisted ZnO nanocomposite (AZ) was fabricated by using the co-precipitation method. HR-SEM reveals the presence of nano rods, plates and balls. The incorporation of silver to ZnO reduces the bandgap of ZnO by the Surface Plasmon Resonance effect and this leads to the shift in the emission spectra from ultraviolet (UV) to the visible region. This provide an opportunity to capture large number of photons from the sunlight. The photocatalytic test was conducted under natural sunlight with cationic and anionic dyes. Among all the prepared samples, AZ-1 exhibited the highest photocatalytic degradation efficiency over methylene blue (MB) dye. The prepared samples would create the new pathway for degrading the industrial waste water treatment process.

Elucidation of photocatalysis, photoluminescence and antibacterial studies of Ag2MoO4 decorated NiMoO4 nano-heterostructure

Abstract Photocatalysis is reported to be an effective method for the removal of organic toxic pollutant present in the environmental waters and industrial effluents. NiMoO4/Ag2MoO4 nanocluster (NMO/AMO) was synthesized for its multiple applications such as photocatalytic property under visible light irradiation and antimicrobial activity. The structure and the morphological features of NMO/AMO was determined by high-resolution transmission electron microscope (HRTEM), X-ray diffraction (XRD), fourier-transfer infrared spectroscopy (FTIR), photoluminescence (PL), energy dispersive X-ray spectroscopy (EDAX), BET isotherm and UV–visible diffuse reflectance spectroscopy (UV–vis DRS). EDAX and XRD confirm the formation of NMO/AMO and its crystalline nature. PL of NMO/AMO showed that the intensity was lower than individual AMO and NMO, which indicates its reduced recombination of charge carriers. Effective photodegradation of methylene blue (MB) dye was noticed by using NMO/AMO. NMO/AMO nanocluster showed 84.5% degradation at 1st cycle and 82.2% at 6th cycle which confirm its reusability. Here, the photocatalytic activity was enhanced mainly due to h+ and OH., and it follows pseudo first order kinetics. The antimicrobial activity of NMO/AMO nanocluster, AMO and NMO nanoparticles were performed against Escherichia coli and Bacillus subtilis at different concentrations. The NMO/AMO nanocluster showed effective antimicrobial activity than the individual AMO and NMO nanoparticles. Hence, the fabricated NMO/AMO nanocluster could be used as an effective candidate for high potential environmental application such has industrial water treatment, antibacterial agent etc.

Comb-like structural modification stabilizes polyvinylidene fluoride membranes to realize thermal-regulated sustainable transportation efficiency

Hydrophobic micro-porous membrane such as polyvinylidene fluoride (PVDF) with excellent thermal-/chemical-stability and low surface energy has received extensive attention in industrial water treatment and sustainable energy conversion. However, undesirable contaminants caused by inevitable proteins or microorganisms adhesion may lead to a rapid loss of separation efficiency, which significantly deteriorate their porous structures and eventually limit their practical performance. Herein, we present a scalable approach for fabricating comb-like copolymer modified PVDF membranes (PVDF-PN@AgNPs) that prevent bacteria from proliferating on the surface and temperature-controlled release of adhered contaminants. Comb-like structured copolymers were imparted to a polydopamine (PDA)-treated PVDF membrane by Michael addition reaction, which enabled a covalent binding of comb-like structured copolymers to the membrane. Such unique structural design of grafted copolymer, containing hydrophilic side chain and temperature-responsive chain backbone, stably prevents bacteria adhesion and provides reversible surface wettability. Therefore, the resultant membranes were evaluated to prevent bacterial adhesion, high touch-killing efficiency and temperature-controlled contaminants release (~99% of protein and ~75% of bacteria). Moreover, with the collapse and stretch of grafted copolymer chain backbone, the synthetic membrane further reversibly adjusted inner micro-porous structure and surface wettability, which eventually helped to achieve variable water fluid transport efficiency. This study not only provides a feasible structural design for stably coping with the challenging of antifouling and subsequent contamination adhesion of PVDF membrane, but also potentially answers the significant gap between lab research advances and practical application, particularly in the industrial membrane field.

Fundamental physico-chemical and mechanical analysis of different clay types

Clay plays an important role in the most of industries that related with water treatment and food stowage industries. The adequate physic-chemical properties are the most recognized factor for the wide range of applications. The investigation of the fundamental physic-chemical and some mechanical properties of such clay is an insistent task before the selection of some material for some specific role. The analysis of the fundamental physic-chemical and grain size analysis of grain sizes of three different types of selected clays were the aims and objectives of the existing research. Clay samples were collected from three different locations in Sri Lanka and they were stored well. The clay samples were named as anthill clay, brick clay and roof tile clay. Some potion from each clay sample was separated and such separated clay samples were oven dried for 24 hours under the temperature 110°C. Each of dried clay sample was separated again and the separated portions were prepared for the test of moisture content, dry sieve analysis and wet sieve analysis. As the major results of the experiment, especially there were obtained 14.49%, 21.45% and 25.97% moisture contents with respect to anthill, brick and roof tile clays, well-graded particle arrangement in roof tile clay, gap graded particle arrangement in anthill clay and uniformly graded particle arrangement in brick clays. In addition, according to the obtained results there were seen the finer particle weight percentages as 59.90%, 37.36% and 72.38% with respect to anthill clay, brick clay and roof tile clay.

Implementasi Kebijakan Pencegahan Pencemaran Air Permukaan oleh Air Limbah Industri di Daerah Aliran Sungai Brantas Kediri

&lt;p&gt;&lt;em&gt;The City Government of Kediri in an effort to preserve the environment forms a legal basis namely the City Regulation of Kediri Number 3 of 2009 cocerning Environmental Management. One of the targets in the regional regulation is to preserve the watershed and water sources. In accordance with the 2015-2019 Medium Term Development Plant , there are 15 watersheds that are prioritized to be restored first and one of them is the Brantas watersheds. This study aims to identify the implementation of the Kediri City Government policy in preventing surface water pollution by industrial wastewater in the Brantas River Basin, Kediri District. The method used in this research is descriptive. Collecting data by conducting in-depth interviews with industrial waste water treatment officers and officers in the field of environmental damage pollution in the Departement of Environment, Hygiene and Gardening of Kediri City. Based on the research results, it is known that most of the industries have carried out wastewater treatment and not ith a dilution process and most of the industries have IPLC. Based on the wuality standards, it is known that the quality standards of industrial waste are in accordance with the standards set&lt;/em&gt; &lt;em&gt;by the government and the industry routinely conducts wastewater quality tests, but the industry is still lacking in reporting the results of wastewater quality tests. In wastewater treatment facilities and infrastructure, the government has provided rubbish place for industrial estates and most industries have their own rubbish place. &lt;/em&gt;&lt;/p&gt;

Best available technologies: selection of domestic disinvasion products in the treatment of industrial waste water and their sediments

Introduction. The authors carried out a comparative analysis of Russian and foreign approaches to regulatory and legal regulation of technologies for industrial treatment of wastewater and its sediments concerning parasitic pathogens. The scientific and applied aspects of introducing domestic lime-containing reagents into disinvasion technology, which can be an alternative to energy-intensive and expensive water treatment methods, have been updated. For consideration by the R.F. Department of water and communal services, the work presents a comparative analysis of Russian and European regulatory and legal acts on the use of reagent compositions of slaked/quicklime in industrial technologies for decontamination and disinfection of sewage and their sediments. Standardization of processes and quality of wastewater disinvasion and its sediments with justification of measures to strengthen hygienic control in the world community of water treatment is updated. Materials and methods. applied methods of overview, comparative analysis to evaluate the regulatory and legal regulation of technological techniques that ensure parasitocidal efficiency of wastewater treatment and its sediments in industrial water treatment. Results. The data of full-scale studies of the waters of the surface reservoirs of the Moscow region and the quality of wastewater treatment at discharge points indicate the low efficiency of disinvestment of urban wastewater from centralized wastewater disposal, entering the hydraulic structures of the metropolis and their contribution to the total level of high parasitic pollution of surface water sources. Conclusion. The analysis of the regulatory regulation of the wastewater treatment and sediments industry showed no development of standardization of wastewater and sediments treatment sub-processes and their complete disinvasion according to parasitic safety criteria. A comparative analysis of measures to enhance hygienic assessment of the quality of cleaning and production of secondary products from formed waste and sediments also showed that preliminary work was done with best available technologies (BAT-5) (information technology support (ITS) 10-2015) on compliance with the sanitary legislation of the Russian Federation, including in terms of legal regulation of standard procedures for the production of by-product (biogas, organic fertilizer, soil, recultivant, etc.) or practically non-hazardous or low-hazard waste intended for placement in the environment.

МОДИФИЦИРОВАННЫЕ ПОЛИЭТИЛЕНПОЛИАМИНОМ ИЭПОКСИДНОЙ СМОЛОЙ ЦЕОЛИТЫ ДЛЯ ИЗВЛЕЧЕНИЯ ИОНОВ СВИНЦА ИЗ СТОЧНЫХ ВОД

Актуальность. Создание эффективных и недорогих сорбентов широкого профиля, одним из актуальных направлений которого является дизайн сорбентов для очистки вод различного назначения, постоянно востребовано в науке и производстве. Новые ионообменные сорбенты позволяют решать сразу две связанные задачи: очистка технической воды предприятий и регулирование содержания токсикантов в окружающей среде. Модифицирование ионообменников приводит к улучшению сорбционных и кинетических характеристик, особенно перспективны природные высокопроницаемые сетчатые полиэлектролиты с большой скоростью поглощения ионов крупных размеров. Модифицирование этих минералов поверхностным слоем сополимеров с эпоксидными группами, полученными при отверждении смеси полиэтиленполиамина и эпоксидной смолы, позволяет получить новые дешевые сорбционные материалы для очистки воды от тяжелых металлов, преимущественно катионов свинца Pb2+. Исследование обусловлено необходимостью очистки сточных вод металлургических предприятий от катионов Pb2+, которые относятся к токсичным веществам, проявляющим мутагенные, канцерогенные свойства, кроме того, встроенные в биогенные формы ионы обладают свойством локально накапливаться в природных объектах, тем самым являясь сильным экотоксикантом. Цель: определить сорбционные свойства природного цеолита и его модифицированной формы по отношению к иону Pb2+ и оптимизировать условия сорбции. Объекты: Шанханайский природный цеолит и его модифицированные полиэтиленполиамином (ПЭПА) и эпоксидной смолой (ЭД-20) формы. Методы: спектрофотометрия. Результаты. Получены модифицированные полиэтиленполиамином и эпоксидной смолой сорбенты на основе Шанханайского природного цеолита. Установлены оптимальные условия рН сорбции ионов Pb2+ в статических условиях. При использовании модифицированного природного цеолита в диапазоне рН 7–9 извлечение ионов свинца происходит на 90 % по сравнению с исходным цеолитом.Модифицированный природный цеолит может быть использован в качестве сорбционного материала для очистки промышленных и сточных вод.