scholarly journals Catalytic Neutralization of Water Pollutants Mediated by Dendritic Polymers

2021 ◽  
Author(s):  
Michael Arkas ◽  
Ioannis Anastopoulos ◽  
Dimitrios Giannakoudakis ◽  
Ioannis Pashalidis ◽  
Theodora Katsika ◽  
...  
Keyword(s):  
Water Purification ◽  
Water Remediation ◽  
Environmentally Benign ◽  
Dendritic Polymers ◽  
Water Pollutants ◽  
Composite Catalysts ◽  
Internal Cavities ◽  
High Concentrations

Radially polymerized dendritic compounds are nowadays an established polymer category next to their linear, branched and cross-linked counterparts. Their uncommon tree-like architecture is characterized by adjustable internal cavities and external groups. They are therefore exceptional absorbents and this attainment of high concentrations into their interior renders them ideal reac-tion media. In this framework they are applied in many environmentally benign implementa-tions. One of the most important among them is water purification though pollutant decomposi-tion. Simple and composite catalysts and photo-catalysts containing dendritic polymers and ap-plied in water remediation will be discussed jointly with some unconventional solutions and fu-ture prospects.

Hybrid mineral@silsesquioxane particles for water remediation: synthesis, characterization and application as adsorbent of As(V) and other water pollutants

2018 ◽  
Vol 53 (18) ◽  
pp. 12781-12794 ◽  
Author(s):  
Carolina V. Waiman ◽  
Ignacio E. dell’Erba ◽  
Carlos A. Chesta ◽  
María Lorena Gómez
Keyword(s):  
Water Remediation ◽  
Water Pollutants

scholarly journals Multifunctional Efficacy of Environmentally Benign Silver Nanospheres for Organic Transformation, Photocatalysis, and Water Remediation

ACS Omega ◽  
2020 ◽  
Vol 5 (40) ◽  
pp. 26063-26076
Author(s):  
Farha Naaz ◽  
Umar Farooq ◽  
M. A. Majeed Khan ◽  
Tokeer Ahmad
Keyword(s):  
Water Remediation ◽  
Environmentally Benign ◽  
Silver Nanospheres

Facile fabrication of 3D ferrous ion crosslinked graphene oxide hydrogel membranes for excellent water purification

2019 ◽  
Vol 6 (10) ◽  
pp. 3060-3071 ◽  
Author(s):  
Zhangjingzhi Chen ◽  
Jun Wang ◽  
Xiaoguang Duan ◽  
Yuanyuan Chu ◽  
Xiaoyao Tan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
High Surface ◽  
Ferrous Ion ◽  
Porous Structures ◽  
Water Pollutants ◽  
3D Graphene ◽  
Surface Areas ◽  
Hydrogel Membranes ◽  
Facile Fabrication

3D graphene-based macrostructures have been recognized as promising candidates for adsorption and separation of water pollutants due to their well-defined porous structures and high surface areas.

scholarly journals Synthesis of Three-Dimensional Graphene-Based Hybrid Materials for Water Purification: A Review

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1123 ◽  
Author(s):  
Yan Wang ◽  
Lei Guo ◽  
Pengfei Qi ◽  
Xiaomin Liu ◽  
Gang Wei
Keyword(s):  
Hybrid Materials ◽  
Water Purification ◽  
Environmental Science ◽  
Materials Science ◽  
Three Dimensional ◽  
Water Remediation ◽  
3D Graphene ◽  
Practical Applications ◽  
Treatment Techniques ◽  
Adsorption Removal

Graphene-based nanostructures and nanomaterials have been widely used for the applications in materials science, biomedicine, tissue engineering, sensors, energy, catalysis, and environmental science due to their unique physical, chemical, and electronic properties. Compared to two-dimensional (2D) graphene materials, three-dimensional (3D) graphene-based hybrid materials (GBHMs) exhibited higher surface area and special porous structure, making them excellent candidates for practical applications in water purification. In this work, we present recent advances in the synthesis and water remediation applications of 3D GBHMs. More details on the synthesis strategies of GBHMs, the water treatment techniques, and the adsorption/removal of various pollutants from water systems with GBHMs are demonstrated and discussed. It is expected that this work will attract wide interests on the structural design and facile synthesis of novel 3D GBHMs, and promote the advanced applications of 3D GBHMs in energy and environmental fields.

Improving antifouling ability by site-specific silver decoration on polyethylene ionomer membranes for water remediation: assessed using 3D micro computed tomography, water flux and antibacterial studies

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88057-88065 ◽  
Author(s):  
Prasanna Kumar S. Mural ◽  
Shubham Jain ◽  
Giridhar Madras ◽  
Suryasarathi Bose
Keyword(s):  
Computed Tomography ◽  
Water Purification ◽  
Water Flux ◽  
Water Remediation ◽  
Micro Computed Tomography ◽  
Site Specific ◽  
Antibacterial Studies ◽  
Ionomer Membranes ◽  
Antifouling Ability

Silver laden ionomeric membranes for efficient water purification.

scholarly journals Nano-structured Cellulose as Green Adsorbents for Water Purification: A Mini Review

2019 ◽  
Vol 23 (2) ◽  
Author(s):  
H. Ibrahim ◽  
N. Sazali ◽  
I. N. Ibrahim ◽  
M. S. Sharip
Keyword(s):  
Water Purification ◽  
Agricultural Waste ◽  
Water Sources ◽  
Water Remediation ◽  
Good Prospect ◽  
Clean Water ◽  
Separation And Purification ◽  
Water Separation ◽  
Wide Range

Celluloses are natural polysaccharides that have garnered attentions in recent years due to their sustainability, availability and notable applications in various fields. Whilst demand of clean water sources keep increasing, modified nano-structured cellulose derived from agricultural waste showed a good prospect in adsorbing pollutants from water. To date, large number of studies have reported the performance of nanocellulose in removing wide range of pollutants from effluents. The purpose of this mini review is to present an overview of existing literatures on the utilization of nanocellulose-based materials as adsorbent for water remediation and make aware of possible development of integrating adsorption and nanotechnology for water separation and purification.

scholarly journals Toward Green Production of Chewing Gum and Diet: Complete Hydrogenation of Xylose to Xylitol over Ruthenium Composite Catalysts under Mild Conditions

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Cai-Juan Liu ◽  
Ning-Ning Zhu ◽  
Jian-Gong Ma ◽  
Peng Cheng
Keyword(s):  
Ambient Pressure ◽  
Environmentally Benign ◽  
Composite Catalyst ◽  
Chewing Gum ◽  
Energy Costs ◽  
Reaction Conditions ◽  
Composite Catalysts ◽  
Successful Attempt ◽  
Green Production ◽  
First Time

Xylitol is one of the most famous chemicals known to people as the essential ingredient of chewing gum and as the sugar alternative for diabetics. Catalytic hydrogenation of biomass-derived xylose with H2 to produce high-value xylitol has been carried out under harsh reaction conditions. Herein, we exhibit the combination of Ru NPs with an environmentally benign MOF (ZIF-67) to afford a heterogeneous composite catalyst. Complete conversion of xylose with 100% selectivity to xylitol was achieved at 50°C and 1 atm H2. This is the first successful attempt to produce xylitol with ambient pressure H2 as well as the first time to achieve a 100% selectivity of xylitol for applicable catalysts. We also proved the universality of the Ru@ZIF-67 towards other hydrogenation processes. Under 1 atm H2, we achieved 100% conversion and >99% selectivity of 1-phenylethanol at 50°C for the hydrogenation of acetophenone. This is also the first report of hydrogenating acetophenone to 1-phenylethanol under 1 atm H2, which confirms that our result not only contributes to enhance the industrial yields of xylitol and reduces both the economical and energy costs but also provides new perspectives on the other hydrogenation process with H2.

Functional Dendritic Polymers for the Development of Hybrid Materials for Water Purification

2010 ◽  
Vol 295 (10) ◽  
pp. 883-898 ◽  
Author(s):  
Michael Arkas ◽  
Dimitris Tsiourvas ◽  
Constantinos M. Paleos
Keyword(s):  
Hybrid Materials ◽  
Water Purification ◽  
Dendritic Polymers

Purification of eutrophic water by ryegrass

2012 ◽  
Vol 66 (10) ◽  
pp. 2138-2145 ◽  
Author(s):  
Zheli Ding ◽  
Avi Golan-Goldhirsh ◽  
Muhammad Khalid Rafiq ◽  
Tingqiang Li ◽  
Fengliang Zhao ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Water Purification ◽  
Plant Biomass ◽  
Accumulation Rate ◽  
Dry Weight ◽  
Water Remediation ◽  
Shoot Biomass ◽  
Nitrogen And Phosphorus ◽  
Eutrophic Water ◽  
Floating Plant

The present study was carried out to investigate the growth characteristics of different ryegrass (Lolium perenne L.) cultivars and their ability to remediate eutrophic water using floating plant-bed technology. Greenhouse and lake experiments were conducted to evaluate the grass genotypes for water remediation. Twelve cultivars of ryegrass including Grazer, Secale Cerale, Energa, Rustmaster, AngusI, Abundant, AngusII, Jivet, Gulf, Surrey, Major and Barwoltra were grown in the floating plant-bed system. The plant biomass, plant NP (nitrogen and phosphorus) accumulations and the water purification capacity of selected grasses were significantly different (P < 0.05). Abundant, AngusII and Major showed most efficient purification capacity of eutrophic water. In a greenhouse, after 26 days of growth, the eutrophic water was purified to various extents by the different ryegrass cultivars. Nitrogen removal efficiency varied from 52.20% to 73.82% and phosphorus removal efficiency ranged from 75.12% to 84.77%. In a lake experiment at Huajiachi pond, after 162 days of growth, the plant shoot biomass increased from 321.5 to 922.8 g/m2 dry weight basis, shoot NP accumulation ranged from 61.5 to 168.2 mg m−2 d−1 and 11.9 to 47.2 mg m−2 d−1 respectively. NP accumulation rate by the various cultivars of ryegrass was highly positively correlated to their biomass production and water purification capacity. Thus, plant biomass could be used as an indicator for assessing purification capacity of a ryegrass cultivar.

scholarly journals Isolation of Four Microalgal Strains From the Lake Massaciuccoli: Screening of Common Pollutants Tolerance Pattern and Perspectives for Their Use in Biotechnological Applications

2020 ◽  
Vol 11 ◽  
Author(s):  
Carolina Chiellini ◽  
Lorenzo Guglielminetti ◽  
Sabrina Sarrocco ◽  
Adriana Ciurli
Keyword(s):  
Coastal Plain ◽  
Wastewater Treatment Plants ◽  
Optical Microscope ◽  
Water Remediation ◽  
Resistance Pattern ◽  
Morphological Aspect ◽  
Geographic Isolation ◽  
The Earth ◽  
Ancient Times ◽  
High Concentrations

Aquatic ecosystems represent one of the largest reservoirs of phytoplankton accounting for most of the primary production of the Earth. The Lake Massaciuccoli located in Tuscany (Italy) is one of the largest swamps that in ancient times entirely covered the Versilia coastal plain. Despite its peculiar features, especially the eutrophic characteristics, its native microalgal consortia have never been explored up to now. In this work, we isolated and described four autochthonous microalgal strains from different sites in the lake (FB, Idr, CL_Sc, and CL_Ch); the four microalgal strains were identified within the Chlorella sorokiniana clade. We exposed them to ten of the most common or emerging environmental contaminants in order to describe their preliminary response to the tested substances: five metals (As, Fe, Ni, Cu, and Zn), two herbicides (Metolachlor and Sethoxydim), two antibiotics (Ciprofloxacin and Benzylpenicillin) and a non-steroidal anti-inflammatory drug (Ibuprofen). Physiological response of the strains highlighted intraspecific differences; strain CL_Sc was the most tolerant in presence of metals while strain Idr was the most sensitive. All strains were sensitive to sethoxydim and tolerant to metolachlor at all the tested concentrations. Strains FB and Idr were the most sensitive in presence of Ibuprofen while strain CL_Ch was the most sensitive to the highest Benzylpenicillin concentration. Resistance pattern of strain Idr somehow reflects both the phylogenetic and the geographic “isolation” from all other three strains. Finally, optical microscope observation confirmed some differences also in the microalgae morphological aspect. Overall, all the strains showed interesting responses in presence of high concentrations of the tested substances, representing putative interesting candidates for water remediation in wastewater treatment plants.

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