scholarly journals Electrospun nanofibers for efficient adsorption of heavy metals from water and wastewater

2021 ◽  
Vol 1 (1) ◽  
pp. 1-33
Author(s):  
Maryam Salehi ◽  
◽  
Donya Sharafoddinzadeh ◽  
Fatemeh Mokhtari ◽  
Mitra Salehi Esfandarani ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Conventional Treatment ◽  
Electrospun Nanofibers ◽  
Recent Decade ◽  
Environmental Safety ◽  
Future Research ◽  
Water And Wastewater Treatment ◽  
Treatment Practices ◽  
Water And Wastewater

<abstract> <p>Heavy metals (HMs) are persistent and toxic environmental pollutants that pose critical risks toward human health and environmental safety. Their efficient elimination from water and wastewater is essential to protect public health, ensure environmental safety, and enhance sustainability. In the recent decade, nanomaterials have been developed extensively for rapid and effective removal of HMs from water and wastewater and to address the certain economical and operational challenges associated with conventional treatment practices, including chemical precipitation, ion exchange, adsorption, and membrane separation. However, the complicated and expensive manufacturing process of nanoparticles and nanotubes, their reduced adsorption capacity due to the aggregation, and challenging recovery from aqueous solutions limited their widespread applications for HM removal practices. Thus, the nanofibers have emerged as promising adsorbents due to their flexible and facile production process, large surface area, and simple recovery. A growing number of chemical modification methods have been devised to promote the nanofibers' adsorption capacity and stability within the aqueous systems. This paper briefly discusses the challenges regarding the effective and economical application of conventional treatment practices for HM removal. It also identifies the practical challenges for widespread applications of nanomaterials such as nanoparticles and nanotubes as HMs adsorbents. This paper focuses on nanofibers as promising HMs adsorbents and reviews the most recent advances in terms of chemical grafting of nanofibers, using the polymers blend, and producing the composite nanofibers to create highly effective and stable HMs adsorbent materials. Furthermore, the parameters that influence the HM removal by electrospun nanofibers and the reusability of adsorbent nanofibers were discussed. Future research needs to address the gap between laboratory investigations and commercial applications of adsorbent nanofibers for water and wastewater treatment practices are also presented.</p> </abstract>

Recent Trends and Advancement in Nanotechnology for Water and Wastewater Treatment

2016 ◽  
pp. 208-252
Author(s):  
Sushmita Banerjee ◽  
Ravindra Kumar Gautam ◽  
Pavan Kumar Gautam ◽  
Amita Jaiswal ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Wastewater Treatment ◽  
Management Practices ◽  
Future Research ◽  
Inorganic Contaminants ◽  
Waste Streams ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Recent Trends ◽  
Water And Wastewater ◽  
Significant Attention

Fast growing demand of fresh water due to increasing population and industrialization dictated research interests towards development of techniques that offers highly efficient and affordable methods of wastewater treatment. In recent decades water treatment using nano-technological based expertise have gained significant attention. Varieties of nanoparticles were synthesized and proficiently used in treatment of wide range of organic and inorganic contaminants from waste streams. This chapter encompasses recent development in nano-technological approach towards water and wastewater treatment. The authors tried to compile up to-date development, properties, application, and mechanisms of the nanoparticles used for decontamination purpose. This piece of work offer a well organized comprehensive assessment of the technology that delineates opportunities as well as its limitation in water management practices moreover few recommendations for future research are also proposed.

scholarly journals Recent advances in biochar application for water and wastewater treatment: a review

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9164
Author(s):  
Xiaoqing Wang ◽  
Zizhang Guo ◽  
Zhen Hu ◽  
Jian Zhang
Keyword(s):  
Wastewater Treatment ◽  
Future Research ◽  
Water And Wastewater Treatment ◽  
Research Directions ◽  
The Past ◽  
Recent Advances ◽  
Future Research Directions ◽  
Water And Wastewater ◽  
Contaminants Removal ◽  
Sorption Mechanisms

In the past decade, researchers have carried out a massive amount of research on the application of biochar for contaminants removal from aqueous solutions. As an emerging sorbent with great potential, biochar has shown significant advantages such as the broad sources of feedstocks, easy preparation process, and favorable surface and structural properties. This review provides an overview of recent advances in biochar application in water and wastewater treatment, including a brief discussion of the involved sorption mechanisms of contaminants removal, as well as the biochar modification methods. Furthermore, environmental concerns of biochar that need to be paid attention to and future research directions are put forward to promote the further application of biochar in practical water and wastewater treatment.

scholarly journals Laboratory Evaluation Of Chemical Oil Dispersants

1969 ◽  
Vol 1969 (1) ◽  
pp. 193-197 ◽  
Author(s):  
A. Oda
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Uptake ◽  
Preliminary Data ◽  
Laboratory Evaluation ◽  
Water And Wastewater Treatment ◽  
Treatment Practices ◽  
Oil Dispersants ◽  
Standard Procedures ◽  
Water And Wastewater ◽  
Selection Of

Abstract This paper describes some of the methods which can be used to evaluate chemical oil dispersants in order to obtain some preliminary data related to their effectiveness as dispersants and problems that may result from their use. Most of the techniques are quite simple and can be done fairly rapidly in the laboratory. Some of these were borrowed from the standard procedures employed in water and wastewater treatment practices and include jar tests, bioassays, oxygen uptake measurements and threshold odor determinations. Data derived from these tests may be of some value in situations where a selection of a suitable dispersant must be made on the basis of only limited knowledge and experience.

Graphene, electrospun membranes and granular activated carbon for eliminating heavy metals, pesticides and bacteria in water and wastewater treatment processes

The Analyst ◽  
2018 ◽  
Vol 143 (23) ◽  
pp. 5629-5645 ◽  
Author(s):  
Piumie Rajapaksha P. ◽  
Aoife Power ◽  
Shaneel Chandra ◽  
James Chapman
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Water And Wastewater Treatment ◽  
Safe Water ◽  
Treatment Processes ◽  
Electrospun Membranes ◽  
Water And Wastewater

The availability of safe water has a significant impact on all parts of society, its growth and sustainability, both politically and socioeconomically.

Recent Trends and Advancement in Nanotechnology for Water and Wastewater Treatment

2017 ◽  
pp. 1745-1779
Author(s):  
Sushmita Banerjee ◽  
Ravindra Kumar Gautam ◽  
Pavan Kumar Gautam ◽  
Amita Jaiswal ◽  
Mahesh Chandra Chattopadhyaya
Keyword(s):  
Wastewater Treatment ◽  
Management Practices ◽  
Future Research ◽  
Inorganic Contaminants ◽  
Waste Streams ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Recent Trends ◽  
Water And Wastewater ◽  
Significant Attention

Fast growing demand of fresh water due to increasing population and industrialization dictated research interests towards development of techniques that offers highly efficient and affordable methods of wastewater treatment. In recent decades water treatment using nano-technological based expertise have gained significant attention. Varieties of nanoparticles were synthesized and proficiently used in treatment of wide range of organic and inorganic contaminants from waste streams. This chapter encompasses recent development in nano-technological approach towards water and wastewater treatment. The authors tried to compile up to-date development, properties, application, and mechanisms of the nanoparticles used for decontamination purpose. This piece of work offer a well organized comprehensive assessment of the technology that delineates opportunities as well as its limitation in water management practices moreover few recommendations for future research are also proposed.

Effect of Magnetic Magnetite (Fe3O4) Nanoparticle Size on Arsenic (V) Removal from Water

2021 ◽  
Vol 21 (4) ◽  
pp. 2576-2581
Author(s):  
N. T. T. Thao ◽  
D. H. Nguyen ◽  
Pham The Kien ◽  
Thanh-Tung Duong ◽  
Nguyen Thi Kim Lien ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Absorption Efficiency ◽  
Precipitation Method ◽  
Water And Wastewater Treatment ◽  
Ion Removal ◽  
Magnetite Fe3o4 ◽  
Isotherm Adsorption ◽  
Water And Wastewater ◽  
Co Precipitation ◽  
Average Size

Magnetic magnetite (Fe3O4) nanoparticles with average sizes of 5.11, 10.53, and 14.76 nm were synthesized by the chemical co-precipitation method. The surface area of Fe3O4 nanoparticles (average size of 5.11 nm) had the largest value of 167 m2/g. The adsorption capacity for removing arsenic (As(V)) from water at 3 ppm concentration was investigated by atomic absorption spectroscopy. Results showed that the As(V) adsorption capacity of Fe3O4 was dependent on particle size. The maximum absorption efficiency (Hmax) reached 99.02%, the equilibrium time was 30 min; the maximum Langmuir isotherm adsorption capacity was 14.46 mg/g with Fe3O4 nanoparticle an average size of 5 nm. The results indicate that reducing the size of Fe3O4 nanoparticles is a promised way for As(V) ion removal from water and wastewater treatment.

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