scholarly journals Evaluation of Phytoremediation Potential of Vetiver Grass (Chrysopogon zizanioides (L.) Roberty) for Wastewater Treatment

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Mahdi Mahmoudpour ◽  
Siamak Gholami ◽  
Majid Ehteshami ◽  
Marjan Salari
Keyword(s):  
Water Pollution ◽  
Industrial Applications ◽  
Grass Species ◽  
Vetiver Grass ◽  
Treatment Wetland ◽  
Global Issues ◽  
Dam Reservoirs ◽  
Removal Of Heavy Metals ◽  
Iranian State ◽  
Rate Of Evaporation

Water pollution is one of the most critical global issues. Meanwhile, the problem of water pollution of rivers especially in Iran is rising due to expansion of agricultural and industrial applications. Due to a large number of sewer catchments, there are some dam reservoirs like ZHAVE in Iranian state of Kurdistan that have not been able to collect significant amount of water since last 10 years. Removal of heavy metals as contaminants from runoffs and recycling of water is a necessity and a vital issue in the world. Various methods and standards are invented and used to isolate and remove all types of pollutants. This study focuses on the purification and removal of contaminants in water sources using the phytoremediation method by introducing Vetiver grass species in the case of floating treatment wetland (FTW). This study’s preliminary purpose is to investigate a practical remedial solution and improvement methodology for the water quality of reservoirs and rivers by growing the floating Vetiver island method. The results show that following parameters such as COD by 97%, TN by 90%, phosphorus by 66%, TDS by 26%, and evapotranspiration by 40% were reduced. Therefore, we concluded that for a wastewater with varying neutrient concentrations such as in ZHAVE dam, concentration of nutrients N and P was controlled and consequently inhibition and prevention of the eutrophication of water resources in the medium and long term became possible due to reduction in the rate of evaporation from reservoirs.

scholarly journals Pseudozyma brasiliensis sp. nov., a xylanolytic, ustilaginomycetous yeast species isolated from an insect pest of sugarcane roots

2014 ◽  
Vol 64 (Pt_6) ◽  
pp. 2159-2168 ◽  
Author(s):  
Juliana Velasco de Castro Oliveira ◽  
Thuanny A. Borges ◽  
Renato Augusto Corrêa dos Santos ◽  
Larissa F. D. Freitas ◽  
Carlos Augusto Rosa ◽  
...  
Keyword(s):  
Intestinal Tract ◽  
Specific Activity ◽  
Yeast Species ◽  
Novel Species ◽  
Large Subunit ◽  
Insect Pest ◽  
Industrial Applications ◽  
Vetiver Grass ◽  
Biotechnological Potential ◽  
Ustilaginomycetous Yeast

A novel ustilaginomycetous yeast isolated from the intestinal tract of an insect pest of sugarcane roots in Ribeirão Preto, São Paulo State, Brazil, represents a novel species of the genus Pseudozyma based on molecular analyses of the D1/D2 rDNA large subunit and the internal transcribed spacer (ITS1+ITS2) regions. The name Pseudozyma brasiliensis sp. nov. is proposed for this species, with GHG001T ( = CBS 13268T = UFMG-CM-Y307T) as the type strain. P. brasiliensis sp. nov. is a sister species of Pseudozyma vetiver, originally isolated from leaves of vetiver grass and sugarcane in Thailand. P. brasiliensis sp. nov. is able to grow well with xylan as the sole carbon source and produces high levels of an endo-1,4-xylanase that has a higher specific activity in comparison with other eukaryotic xylanases. This enzyme has a variety of industrial applications, indicating the great biotechnological potential of P. brasiliensis.

scholarly journals Changes in phytoplankton productivity with the introduction of heavy metals into the ecosystem and its subsequent purifi cation with a humic sorbent

2019 ◽  
Vol 46 (2) ◽  
pp. 207-213
Author(s):  
T. S. Skripkina ◽  
A. L. Bychkov ◽  
B. S. Smolyakov ◽  
O. I. Lomovsky
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Humic Acids ◽  
Mesoscale Modeling ◽  
Native Structure ◽  
Phytoplankton Productivity ◽  
Structure Of Molecules ◽  
Removal Of Heavy Metals ◽  
Heavy Metal Cd

Mesoscale modeling experiments simulating water pollution of a freshwater plain reservoir by infusion of a mixture of heavy-metal (Cd, Zn, Cu) salts were conducted. Central to the research was determining the phytoplankton response (in terms of primary production) to the presence of heavy metals in water and to the introduction of a sorbent based on mechanochemically oxidized humic acids. The removal of heavy metals by phytoplankton on the 16th day of the experiment resulted in a decrease in the content of Cd(II) to 62%, Zn(II) to 58%, and Cu(II) to 46% of the initial levels. The use of sorbent under the same conditions led to a decrease in the content of Cd(II) to 21%, Zn(II) to 27%, and Cu(II) to 10% of the initial levels. The sorbent under study does not cause blooming of the reservoir, distinguishing it from sorbents containing humic acids with the native structure of molecules.

Natural polysaccharides leading to super adsorbent hydroxyapatite nanoparticles for the removal of heavy metals and dyes from aqueous solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105618-105630 ◽  
Author(s):  
Danushika C. Manatunga ◽  
Rohini M. de Silva ◽  
K. M. Nalin de Silva ◽  
Rivi Ratnaweera
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Aqueous Solutions ◽  
Industrial Effluents ◽  
Textile Dyes ◽  
Toxic Substances ◽  
Hydroxyapatite Nanoparticles ◽  
Removal Of Heavy Metals

Water pollution has created a major impact on the environment mainly due to contaminated industrial effluents with toxic substances such as heavy metals and textile dyes.

scholarly journals Management of Fruit Industrial By-Products—A Case Study on Circular Economy Approach

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 320 ◽  
Author(s):  
Débora A. Campos ◽  
Ricardo Gómez-García ◽  
Ana A. Vilas-Boas ◽  
Ana Raquel Madureira ◽  
Maria Manuela Pintado
Keyword(s):  
Food Waste ◽  
Circular Economy ◽  
Economic Value ◽  
Industrial Applications ◽  
Global Issues ◽  
Global Issue ◽  
Social Environmental ◽  
Valuable Compounds ◽  
By Products

The management of industrial fruit by-products is important not only to decrease the volume of food waste accumulated in the landfills but also to develop strategies through reuse with the purpose to valorise and add economic value. The disposal of food waste leads to different global issues in different sectors, such as social, environmental and economical. These by-products represent a rich source of valuable compounds (polyphenols) with high antioxidant activity, which can be extracted through biotechnological methodologies for future industrial applications. In this context, the management of fruit by-products is challenged to move from a linear economy to a circular economy. Therefore, the purpose of this review is to provide a critical view of an integrated valorisation of fruit by-products to overcome a global issue, via the production of antioxidant extracts with high economic value. A case study of pineapple processing industrialization in a circular economy is explored and discussed.

scholarly journals How natural materials remove heavy metals from water: mechanistic insights from molecular dynamics simulations

2021 ◽  
Author(s):  
Fabio Pietrucci ◽  
Mauro Boero ◽  
Wanda Andreoni
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Human Health ◽  
Water Sources ◽  
Natural Materials ◽  
Removal Of Heavy Metals ◽  
Dynamics Simulations

Water pollution by heavy metals is of increasing concern due to its devastating effects on the environment and on human health. For the removal of heavy metals from water sources,...

scholarly journals Treatment of Piggery Wastewater by Three Grass Species Growing in a Constructed Wetland

2017 ◽  
pp. 75-83 ◽  
Author(s):  
Supaporn Pongthornpruek
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Surface Flow ◽  
Grass Species ◽  
Vetiver Grass ◽  
Piggery Wastewater ◽  
Wastewater Quality

The study aimed to investigate the efficiency of piggery wastewater treatment by the surface flow constructed wetland with three different grass species; bulrush (Scirpus spp.), cattail (Typha angustifoliaL.), and vetiver grass (Vetiveria zizanioides L.). All pilot units were used for wastewater treatment by the flowing surface water system, giving a system carrying capacity of several 0.18 m3 d-1 of HLR with a 5 day hydraulic retention time (HRT). The results showed that the cattail pilot showed improvement in several wastewater quality indicators: biochemical oxygen demand (BOD), chemical oxygen demand (COD) and total kjeldahl nitrogen (TKN) with efficiencies of 80.59, 84.11 and 88.08 %, respectively. The vetiver grass was most efficient of the three grasses in treating total phosphorus (TP). The efficiency of constructed wetland treatment using bulrush and cattail for TP was not significantly different. The piggery wastewater treatment with a 5 day HRT was able to reduce the dirtiness in wastewater but ultimately was unable to meet the wastewater quality standard. Thus, the periods for hydraulic retention time should be increased to establish the optimal retention time for effective wastewater treatment.

scholarly journals Review of Mathematical Models of Water Quality

2012 ◽  
Vol 19 (2) ◽  
pp. 197-211 ◽  
Author(s):  
Aleksandra Ziemińska-Stolarska ◽  
Jerzy Skrzypski
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Water Resources ◽  
Mathematical Models ◽  
Focal Point ◽  
Rapid Development ◽  
Resources Management ◽  
Natural Processes ◽  
Dam Reservoirs ◽  
Lake Waters

Review of Mathematical Models of Water Quality Water is one of the main elements of the environment which determine the existence of life on the Earth, affect the climate and limit the development of civilization. Water resources management requires constant monitoring in terms of its qualitative-quantitative values. Proper assessment of the degree of water pollution is the basis for conservation and rational utilization of water resources. Water quality in lakes and dams is undergoing continuous degradation caused by natural processes resulting from eutrophication and due to anthropogenic reasons. One of the tools that are used to solve problems of surface water pollution is modelling of changes which take place in lake waters and associated water quality changes. In the last thirty years a rapid development of mathematical modelling of water resources quality has been observed. A number of computer models have been designed which are successfully applied in practice in many countries, including Poland. This paper presents an overview of mathematical models for assessment of water quality in dam reservoirs. Description of the WASP program which will be used for modelling water quality in the Sulejow Reservoir was the focal point.

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