Author: Lea Chua Tan Publisher: CRC Press ISBN: 0429828411 Category : Science Languages : en Pages : 20
Book Description
Selenium (Se) pollution has led to several cases of severe aquatic ecosystem deterioration due to Se poisoning caused by bioaccumulation over time. However, the removal of selenate (SeO42-) from wastewater streams with co-contaminants has been largely considered as a black box in anaerobic biological systems using mixed consortia. This research aimed at addressing the effect of wastewater characteristics, i.e. co-contaminants such as nitrate (NO3-) and sulfate (SO42-), heavy metals and pH, on the biological reduction of SeO42- and evaluating process integration for Se-laden wastewater treatment with co-contaminants. This study demonstrated that the presence of co-contaminants can actually be beneficial for Se removal provided that the concentrations are carefully monitored and appropriate operating conditions and process configurations are used. The Se removal (total Se and SeO42-) efficiency increased by ~30% in the presence of NO3- and/or SO42- compared to systems with SeO42- alone. Additionally, an integrated process of an ion exchange (IX) column and bioreactors showed improved overall removal capacity for SO42- and total Se. The knowledge and information gained from this research can help in the advancement and application of biological processes, i.e. predicting of reactor performance, solving specific design or practical problems and implementing novel treatment techniques for Se-laden mine wastewater.
Author: Lea Chua Tan Publisher: CRC Press ISBN: 0429828403 Category : Science Languages : en Pages : 228
Book Description
Selenium (Se) pollution has led to several cases of severe aquatic ecosystem deterioration due to Se poisoning caused by bioaccumulation over time. However, the removal of selenate (SeO42-) from wastewater streams with co-contaminants has been largely considered as a black box in anaerobic biological systems using mixed consortia. This research aimed at addressing the effect of wastewater characteristics, i.e. co-contaminants such as nitrate (NO3-) and sulfate (SO42-), heavy metals and pH, on the biological reduction of SeO42- and evaluating process integration for Se-laden wastewater treatment with co-contaminants. This study demonstrated that the presence of co-contaminants can actually be beneficial for Se removal provided that the concentrations are carefully monitored and appropriate operating conditions and process configurations are used. The Se removal (total Se and SeO42-) efficiency increased by ~30% in the presence of NO3- and/or SO42- compared to systems with SeO42- alone. Additionally, an integrated process of an ion exchange (IX) column and bioreactors showed improved overall removal capacity for SO42- and total Se. The knowledge and information gained from this research can help in the advancement and application of biological processes, i.e. predicting of reactor performance, solving specific design or practical problems and implementing novel treatment techniques for Se-laden mine wastewater.
Author: Pooja Devi Publisher: John Wiley & Sons ISBN: 1119693454 Category : Technology & Engineering Languages : en Pages : 436
Book Description
The contamination of environment and water resources by Selenium (Se) and its oxyanions from various sources are emerging contaminants of significant health and environmental concern. The primary sources include agricultural drainage water, mine drainage, residues from fossil fuels, thermoelectric power plants, oil refineries, and metal ores. Various methods and technologies have been developed which focus on the treatment of selenium-containing waters and wastewater. High concentrations of selenium in water cause various adverse impact to human health, such as carcinogenic, genotoxic, and cytotoxic effects. But in the lower concentrations, it is a useful constituent of the biological system. The range between toxicity and deficiency of selenium is minimal (40 to 400 μg per day), due to its dual nature. Selenium Contamination in Water contains the latest status and information on selenium’s origin, its chemistry and its toxicity to humans. The book represents a comprehensive and advanced reference book for students, researchers, practitioners, and policymakers in working in the field of metalloids, in particular selenium. A special emphasis is given on its geological distribution, monitoring techniques, and remedial technologies. As such, the authors critically analyze the various techniques used for the monitoring and removal of selenium from water. Featuring chapters arranged according to the major themes of the latest research, with specific case-studies from industrial experiences of selenium detection and removal, Selenium Contamination in Water will be particularly valued by researchers, practitioners, and policymakers in working in the field of metalloids including selenium.
Author: Qaisar Mahmood Publisher: Springer Nature ISBN: 3030914992 Category : Science Languages : en Pages : 327
Book Description
Global industrial growth has resulted in numerous pollutants being introduced into the environment. It has additionally caused decreased water availability for agricultural activity in developing countries, which, in turn, has compelled farmers to use wastewater irrigation. In advanced agricultural systems, farmers are adapting various strategies to achieve a higher yield and thus sustain crop productivity. Consequent to the introduction of contaminants in the environment, soil pollutants have become a critical issue. Selection of disease-resistant, high-yielding crop varieties, and extensive fertilizer applications are quite common among farming communities. This book provides insight into environmental pollutants with special reference to their interference with plant nutrition. It additionally discusses the physiological aspects of plant nutrition. This book enhances current knowledge of the effects of pollutants on plant growth and physiology.
Author: João Batista Teixeira da Rocha Publisher: CRC Press ISBN: 1040153747 Category : Science Languages : en Pages : 257
Book Description
This book explores how metals like cadmium, mercury, lead, aluminium, manganese, and chromium can harm our health, whether through short-term or long-term exposure. It covers symptoms ranging from immediate nausea to long-term issues like Parkinson's and Alzheimer's diseases. Understanding how these metals interact with our bodies is crucial for identifying their harmful effects. The book, divided into 11 chapters, provides straightforward explanations about how these metals affect our health, making it useful for anyone interested in understanding how metals can impact the environment as well as human and animal health.
Author: Ali Asghar Rastegari Publisher: Elsevier ISBN: 0128205296 Category : Technology & Engineering Languages : en Pages : 314
Book Description
New and Future Developments in Microbial Biotechnology and Bioengineering: Trends of Microbial Biotechnology for Sustainable Agriculture and Biomedicine Systems: Perspectives for Human Health discusses how microbial biotechnology helps us understand new strategies to reduce pathogens and drug resistance through microbial biotechnology. The most commonly used probiotic bacteria are Lactobacillus and Bifidobacterium. Therefore, the probiotic strains exhibit powerful anti-inflammatory, antiallergic and other important properties. This new book provides an indispensable reference source for engineers/bioengineers, biochemists, biotechnologists, microbiologists, pharmacologists, and researchers who want to know about the unique properties of this microbe and explore its sustainable biomedicine future applications. - Introduces the principles of microbial biotechnology and its application for sustainable biomedicine system - Explores various microbes and their beneficial application for biofortification of crops for micronutrients - Explains the potentials and significance of probiotics, prebiotics and synbiotics in health and disease - Includes current applications of beneficial microbes as Functional Food Products of Pharmaceutical Importance
Author: Ram Naresh Bharagava Publisher: CRC Press ISBN: 1000574849 Category : Science Languages : en Pages : 282
Book Description
Environmental sustainability with rapid industrialization is one of the current major global challenges. Industries are the key drivers of the world economy. But they are also the major polluters of the environment due to the discharge of partially treated/untreated toxic and hazardous wastes containing organic and inorganic pollutants, which cause severe environmental (soil and water) pollution and toxic effects in living beings. So the adequate treatment of industrial wastes to degrade/detoxify pollutants is of the utmost importance for environmental safety and for promoting the sustainable development of our society with low environmental impacts. Bioremediation: Green Approaches for a Clean and Sustainable Environment showcases the latest information on the different bioremediation approaches used for the many types of industrial pollutants and are dedicated to environmental safety. This book provides a detailed knowledge about the natural as well as anthropogenic sources of different types of toxic pollutants, such as toxic metals, dyes, pesticides, petroleum hydrocarbons and plastics; their fate and transport into the environment; their ecotoxicological effects and health hazards; and different approaches used for their bioremediation for the environmental clean-up. Key Features: Covers the different aspects of environmental problems and their remedies with up-to-date developments in the field of bioremediation of industrial/environmental pollutants Serves as an invaluable source of knowledge for a wide range of students, scientists, and researchers in microbiology, biotechnology, environmental sciences with the fundamental and advanced knowledge about the environmental pollution, challenges, and bioremediation of toxic pollutants
Author: Shrutika Laxmikant Wadgaonkar Publisher: CRC Press ISBN: 042976393X Category : Science Languages : en Pages : 176
Book Description
The aim of this Ph.D. was to develop a technology for the remediation of seleniferous soils/sediments and to explore microbial reduction of selenium oxyanions under different respiration conditions and bioreactor configurations. Seleniferous soil collected from the wheat-grown agricultural land in Punjab (India) was characterized and its soil washing was optimized by varying parameters, where addition of oxidizing agents showed a maximum selenium removal efficiency. Aquatic plants, Lemna minor and Egeria densa were used to study phytoremediation of the selenium-rich soil leachate containing oxidizing agents. Additionally, migration of the soluble selenium fraction from the upper to the lower layers and its subsequent reduction and accumulation in the lower layers of the soil column was observed during soil flushing. Furthermore, the soil leachate containing selenium oxyanions obtained from soil washing was treated in a UASB reactor by varying the organic feed. Ex situ bioremediation of selenium oxyanions was studied under variable conditions. An aerobic bacterium (Delftia lacustris) capable of transforming selenate and selenite to elemental selenium was isolated and characterized. Anaerobic bioreduction of selenate coupled to methane oxidation was investigated in serum bottles and a biotrickling filter using marine sediment as inoculum. Finally, the effect of contamination of other chalcogen oxyanions (tellurium) on selenium bioreduction was studied in a continuous system (UASB reactor).
Author: Pooja Devi Publisher: John Wiley & Sons ISBN: 1119693543 Category : Technology & Engineering Languages : en Pages : 436
Book Description
The contamination of environment and water resources by Selenium (Se) and its oxyanions from various sources are emerging contaminants of significant health and environmental concern. The primary sources include agricultural drainage water, mine drainage, residues from fossil fuels, thermoelectric power plants, oil refineries, and metal ores. Various methods and technologies have been developed which focus on the treatment of selenium-containing waters and wastewater. High concentrations of selenium in water cause various adverse impact to human health, such as carcinogenic, genotoxic, and cytotoxic effects. But in the lower concentrations, it is a useful constituent of the biological system. The range between toxicity and deficiency of selenium is minimal (40 to 400 μg per day), due to its dual nature. Selenium Contamination in Water contains the latest status and information on selenium’s origin, its chemistry and its toxicity to humans. The book represents a comprehensive and advanced reference book for students, researchers, practitioners, and policymakers in working in the field of metalloids, in particular selenium. A special emphasis is given on its geological distribution, monitoring techniques, and remedial technologies. As such, the authors critically analyze the various techniques used for the monitoring and removal of selenium from water. Featuring chapters arranged according to the major themes of the latest research, with specific case-studies from industrial experiences of selenium detection and removal, Selenium Contamination in Water will be particularly valued by researchers, practitioners, and policymakers in working in the field of metalloids including selenium.
Author: Eric D van Hullebusch Publisher: Springer ISBN: 3319578316 Category : Technology & Engineering Languages : en Pages : 134
Book Description
This book features the reduction and removal of selenium in wastewater via bioremediation. Arranged over five chapters, this book provides information regarding the interaction between micro-organisms and selenium, and it also explains the biogeochemistry of selenium in engineered ecosystems designed for wastewater treatment. The analytical approaches currently adopted by the scientific community are also described and discussed. Readers will find examples of the biological treatment of selenium contaminated wastewater, and discover a concise overview of selenium removal processes that are currently implemented at lab-scale as well as at industrial scale.
Author: Lea Chua Tan
Author: Lea Chua Tan
Author: Pooja Devi
Author: Qaisar Mahmood
Author: João Batista Teixeira da Rocha
Author: Ali Asghar Rastegari
Author: Ram Naresh Bharagava
Author: Shrutika Laxmikant Wadgaonkar
Author: Pooja Devi
Author: Eric D van Hullebusch