Removal of heavy metals from industrial effluents by water hyacinth (Eichornia crassipes)

2012 ◽  
Vol 4 (11) ◽  
Author(s):  
Abolanle S. Adekunle
Keyword(s):  
Heavy Metals ◽  
Water Hyacinth ◽  
Industrial Effluents ◽  
Removal Of Heavy Metals ◽  
Eichornia Crassipes

Removal of Heavy Metals from Aquatic Environments Using Water Hyacinth and Water Lettuce

2018 ◽  
Vol 68 (12) ◽  
pp. 2765-2767 ◽  
Author(s):  
Violeta Monica Radu ◽  
Petra Ionescu ◽  
Elena Diacu ◽  
Alexandru Anton Ivanov
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aquatic Plants ◽  
Water Hyacinth ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Aquatic Environments ◽  
Water Lettuce ◽  
Removal Of Heavy Metals ◽  
Eichornia Crassipes

The quality of the aquatic environment was strongly influenced by the development of urbanization, industrialization and population growth, and therefore water pollution, mainly due to the presence of heavy metal, becoming a widespread concern. The objective of this work was to evaluate the possibility to remove heavy metals Cd, Zn, Cr and Ni from wastewater using two aquatic plants, water hyacinth (Eichornia crassipes) and water lettuce (Pistia stratiottes). These plants possess excellent abilities to metabolize and bioaccumulate heavy metals from various polluted aquatic environments. For a period of 30 days, the content of heavy metals from wastewater and aquatic plants samples was monitored weakly and the efficacy of these plants to remove heavy metals was quantified. Heavy metals were determined by atomic absorption spectrophotometry with graphite furnace (GFAAS). The obtained results have shown the efficacy of Eichornia crassipes and Pistia stratiottes to remove metals from the studied wastewater. The bioaccumulation rate of heavy metals in plants was effective until day 24 of the period of 30 days of the experiment, as the plants become inefficient beyond this period. The uptake of heavy metals in the studied aquatic plants depends on the concentration of each heavy metal present in the used wastewater and the exposure time.

scholarly journals Removal of Heavy Metals from Leachate Using Electro-Assisted Phytoremediation (EAPR) and Up-Take by Water Hyacinth (Eichornia crassipes)

2018 ◽  
Vol 18 (2) ◽  
pp. 306 ◽  
Author(s):  
Rudy Syah Putra ◽  
Febby Yulia Hastika
Keyword(s):  
Heavy Metals ◽  
Water Hyacinth ◽  
Batch Reactor ◽  
Heavy Metal Concentration ◽  
Removal Of Heavy Metals ◽  
Unpleasant Odor ◽  
Treated Plant ◽  
Scale Experiment ◽  
Eichornia Crassipes ◽  
Assisted Phytoremediation

The garbage disposal management using landfill system produces an unpleasant odor of wastewater (i.e. leachate) which can disrupt the groundwater equilibrium in the rainy season. The combination of electro-assisted and phytoremediation which is hereinafter referred as Electro-Assisted Phytoremediation (EAPR) for removal of heavy metals from leachate has been demonstrated in a laboratory-scale experiment. A batch reactor setting was used to evaluate the potential removal and uptake of heavy metals (Fe, Cu, Cd, and Pb) concentration by water hyacinth (Eichornia crassipes) in the aquatic environment. An EAPR system was carried out for 11 d using constant voltage of 2 V. The results showed that the heavy metals concentration in the leachate decreased significantly for Cu, Fe, Cd and Pb metals from their initial concentration. The EAPR process could reduce as much as 77.8, 22, 31.6 and 30.0%, respectively for Fe, Cu, Cd, and Pb. Decreasing of heavy metals was followed by decreasing of TDS, electrical conductivity but increased DO concentration. Chlorophyll content in a treated plant with EAPR system showed that the water hyacinth could cope with the stress condition meanwhile accumulated high heavy metal concentration from the leachate.

scholarly journals Simultaneous Removal of Heavy Metals And Bioelectricity Generation In Microbial Fuel Cell Coupled With Constructed Wetland: An Optimization Study On Substrate And Plant Types

2021 ◽  
Author(s):  
Lu Wang ◽  
Dayong Xu ◽  
Qingyun Zhang ◽  
Tingting Liu ◽  
Zhengkai Tao
Keyword(s):  
Heavy Metals ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Constructed Wetland ◽  
Water Hyacinth ◽  
Plant Roots ◽  
Optimization Study ◽  
Removal Of Heavy Metals ◽  
Metal Treatment ◽  
Optimal Construction

Abstract A microbial fuel cell coupled with constructed wetland (CW-MFC) was built to remove heavy metals (Zn and Ni) from sludge. The performance for the effects of substrates (granular activated carbon (GAC), ceramsite) and plants (Iris pseudacorus, Water hyacinth) towards the heavy metal treatment as well as electricity generation were systematically investigated. The CW-MFC systems possessed higher Zn and Ni removal efficiencies as compared to CW. The maximal removal rates of Zn (76.88%) and Ni (66.02%) were obtained in system CW-MFC based on GAC and Water hyacinth (GAC- and WH-CW-MFC). Correspondingly, the system produced the maximum voltage of 534.30 mV and power density of 70.86 mW·m-3, respectively. Plant roots and electrodes contributed supremely to the removal of heavy metals, especially for GAC- and WH-CW-MFC systems. The coincident enrichment rates of Zn and Ni reached 21.10% and 26.04% for plant roots, 14.48% and 16.50% for electrodes, respectively. A majority of the heavy metals on the sludge surface were confirmed as Zn and Ni. Furthermore, the high-valence Zn and Ni were effectively reduced to low-valence or elemental metals. This study provides a theoretical guidance for the optimal construction of CW-MFC and the resource utilization of sludge containing heavy metals.

Perspectives of phytoremediation using water hyacinth for removal of heavy metals, organic and inorganic pollutants in wastewater

2015 ◽  
Vol 163 ◽  
pp. 125-133 ◽  
Author(s):  
Shahabaldin Rezania ◽  
Mohanadoss Ponraj ◽  
Amirreza Talaiekhozani ◽  
Shaza Eva Mohamad ◽  
Mohd Fadhil Md Din ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Hyacinth ◽  
Inorganic Pollutants ◽  
Removal Of Heavy Metals
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