scholarly journals PHYTOREMEDIATON OF HEAVY METALS FROM WASTEWATER BY CONSTRUCTED WETLAND MICROCOSM PLANTED WITH ALOCASIA PUBER

2019 ◽  
Vol 81 (5) ◽  
Author(s):  
Najaa Syuhada Mohamad Thani ◽  
Rozidaini Mohd Ghazi ◽  
Mohd Faiz Mohd Amin ◽  
Zulhazman Hamzah
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Translocation Factor ◽  
Treatment Method ◽  
Synthetic Wastewater ◽  
Contaminated Sites ◽  
Toxic Heavy Metals ◽  
Alternative Technologies ◽  
Metals Removal ◽  
Global Environmental

Water pollution by toxic heavy metals is a global environmental problem. It has led to the development of alternative technologies for heavy metals removal from contaminated sites. Constructed wetland microcosm by using Alocasia puber is a possible treatment method for wastewater containing heavy metals. Synthetic wastewater with heavy metals Cd, Cr, Cu, Ni, and Zn were used in this study. Several heavy metals concentrations (5 mg/L, 10 mg/L and 100 mg/L) were used in the systems. Six different hydraulic retention times (HRTs) (2, 4, 6, 8, 10 and 12 days) were tested in the present study. The results obtained showed removal efficiencies of heavy metals of >99% after day 12. The removal of Ni from 10 mg/L solutions (initial concentrations) recorded the best removal efficiency. Heavy metal translocation factor (TF) was found to be less than 1 for all metals tested, which confirmed the significance of roots as heavy metals accumulator compared to stems or leaves of A, puber. Therefore, this study concluded that A, puber has a great potential as an important component in constructed wetlands for water contaminated with heavy metals.

Performance of constructed wetland for selenium, nutrient and heavy metals removal from mine effluents

Chemosphere ◽  
2021 ◽  
pp. 130921
Author(s):  
Selma Etteieb ◽  
Mehdi Zolfaghari ◽  
Sara Magdouli ◽  
Kamalpreet Kaur Brar ◽  
Satinder Kaur Brar
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Heavy Metals Removal ◽  
Metals Removal

scholarly journals Heavy Metals Removal from Water by Efficient Adsorbents

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2659
Author(s):  
Muhammad Zaim Anaqi Zaimee ◽  
Mohd Sani Sarjadi ◽  
Md Lutfor Rahman
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Adsorption Process ◽  
Natural Occurrence ◽  
Toxic Heavy Metals ◽  
Major Purpose ◽  
Treatment Methods ◽  
Metals Removal ◽  
Harmful Effects

Natural occurrence and anthropogenic practices contribute to the release of pollutants, specifically heavy metals, in water over the years. Therefore, this leads to a demand of proper water treatment to minimize the harmful effects of the toxic heavy metals in water, so that a supply of clean water can be distributed into the environment or household. This review highlights several water treatment methods that can be used in removing heavy metal from water. Among various treatment methods, the adsorption process is considered as one of the highly effective treatments of heavy metals and the functionalization of adsorbents can fully enhance the adsorption process. Therefore, four classes of adsorbent sources are highlighted: polymeric, natural mineral, industrial by-product, and carbon nanomaterial adsorbent. The major purpose of this review is to gather up-to-date information on research and development on various adsorbents in the treatment of heavy metal from water by emphasizing the adsorption capability, effect of pH, isotherm and kinetic model, removal efficiency and the contact of time of every adsorbent.

Novel Bioremediation Methods in Waste Management

2020 ◽  
pp. 1627-1643 ◽  
Author(s):  
Charu Gupta ◽  
Dhan Prakash
Keyword(s):  
Heavy Metals ◽  
Genetically Modified Organisms ◽  
Treatment Method ◽  
Toxic Heavy Metals ◽  
Novel Methods ◽  
Contaminated Waste ◽  
Oily Waste ◽  
Electro Coagulation ◽  
Cadmium And Lead ◽  
New Generation

Bioremediation technologies are one of the novel methods in the field of waste and environment management and are presently gaining immense credibility for being eco-compatible. Bioremediation using microbes has been well accepted as an environment friendly and economical treatment method for disposal of hazardous petroleum hydrocarbon contaminated waste (oily waste). Besides this, earthworms can be used to extract toxic heavy metals, including cadmium and lead, from solid waste from domestic refuse collection and waste from vegetable and flower markets. Other novel methods used recently for treatment of wastes are plasma incineration or plasma assisted gasification and pyrolysis technology. The technologies applied for conditioning include ultrasonic degradation, chemical degradation, enzyme addition, electro-coagulation and biological cell destruction. Genetic engineering is another method for improving bioremediation of heavy metals and organic pollutants. Transgenic plants and associated bacteria constitute a new generation of genetically modified organisms for bioremediation.

Novel Bioremediation Methods in Waste Management

2016 ◽  
pp. 141-157 ◽  
Author(s):  
Charu Gupta ◽  
Dhan Prakash
Keyword(s):  
Heavy Metals ◽  
Genetically Modified Organisms ◽  
Treatment Method ◽  
Toxic Heavy Metals ◽  
Novel Methods ◽  
Contaminated Waste ◽  
Oily Waste ◽  
Electro Coagulation ◽  
Cadmium And Lead ◽  
New Generation

Bioremediation technologies are one of the novel methods in the field of waste and environment management and are presently gaining immense credibility for being eco-compatible. Bioremediation using microbes has been well accepted as an environment friendly and economical treatment method for disposal of hazardous petroleum hydrocarbon contaminated waste (oily waste). Besides this, earthworms can be used to extract toxic heavy metals, including cadmium and lead, from solid waste from domestic refuse collection and waste from vegetable and flower markets. Other novel methods used recently for treatment of wastes are plasma incineration or plasma assisted gasification and pyrolysis technology. The technologies applied for conditioning include ultrasonic degradation, chemical degradation, enzyme addition, electro-coagulation and biological cell destruction. Genetic engineering is another method for improving bioremediation of heavy metals and organic pollutants. Transgenic plants and associated bacteria constitute a new generation of genetically modified organisms for bioremediation.

scholarly journals Effective Heavy Metals Removal from Water Using Nanomaterials: A Review

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 645 ◽  
Author(s):  
Mohamed A. Tahoon ◽  
Saifeldin M. Siddeeg ◽  
Norah Salem Alsaiari ◽  
Wissem Mnif ◽  
Faouzi Ben Rebah
Keyword(s):  
Heavy Metals ◽  
Cost Effective ◽  
Ion Concentration ◽  
Wastewater Remediation ◽  
Toxic Heavy Metals ◽  
Surrounding Environment ◽  
Metals Removal ◽  
Physicochemical Factors ◽  
Magnetic Metal ◽  
High Threat

The discharge of toxic heavy metals including zinc (Zn), nickel (Ni), lead (Pb), copper (Cu), chromium (Cr), and cadmium (Cd) in water above the permissible limits causes high threat to the surrounding environment. Because of their toxicity, heavy metals greatly affect the human health and the environment. Recently, better remediation techniques were offered using the nanotechnology and nanomaterials. The attentions were directed toward cost-effective and new fabricated nanomaterials for the application in water/wastewater remediation, such as zeolite, carbonaceous, polymer based, chitosan, ferrite, magnetic, metal oxide, bimetallic, metallic, etc. This review focused on the synthesis and capacity of various nanoadsorbent materials for the elimination of different toxic ions, with discussion of the effect of their functionalization on the adsorption capacity and separation process. Additionally, the effect of various experimental physicochemical factors on heavy metals adsorption, such as ionic strength, initial ion concentration, temperature, contact time, adsorbent dose, and pH was discussed.

scholarly journals Effects of Ectomycorrhizal Fungi and Heavy Metals (Pb, Zn, and Cd) on Growth and Mineral Nutrition of Pinus halepensis Seedlings in North Africa

2020 ◽  
Vol 8 (12) ◽  
pp. 2033
Author(s):  
Chadlia Hachani ◽  
Mohammed S. Lamhamedi ◽  
Claudio Cameselle ◽  
Susana Gouveia ◽  
Abdenbi Zine El Abidine ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
North Africa ◽  
Mineral Nutrition ◽  
Contaminated Soils ◽  
Mycorrhizal Fungi ◽  
Pinus Halepensis ◽  
Translocation Factor ◽  
Contaminated Sites ◽  
High Concentrations

The pollution of soils by heavy metals resulting from mining activities is one of the major environmental problems in North Africa. Mycorrhizoremediation using mycorrhizal fungi and adapted plant species is emerging as one of the most innovative methods to remediate heavy metal pollution. This study aims to assess the growth and the nutritional status of ectomycorrhizal Pinus halepensis seedlings subjected to high concentrations of Pb, Zn, and Cd for possible integration in the restoration of heavy metals contaminated sites. Ectomycorrhizal and non-ectomycorrhizal P. halepensis seedlings were grown in uncontaminated (control) and contaminated soils for 12 months. Growth, mineral nutrition, and heavy metal content were assessed. Results showed that ectomycorrhizae significantly improved shoot and roots dry masses of P. halepensis seedlings, as well as nitrogen shoot content. The absorption of Pb, Zn, and Cd was much higher in the roots than in the shoots, and significantly more pronounced in ectomycorrhizal seedlings—especially for Zn and Cd. The presence of ectomycorrhizae significantly reduced the translocation factor of Zn and Cd and bioaccumulation factor of Pb and Cd, which enhanced the phytostabilizing potential of P. halepensis seedlings. These results support the use of ectomycorrhizal P. halepensis in the remediation of heavy metal contaminated sites.

scholarly journals PHYTOREMEDIATION OF SYNTHETIC WASTEWATER CONTAINING COPPER BY USING NATIVE PLANT

2020 ◽  
Vol 51 (6) ◽  
pp. 1160-1612
Author(s):  
Zeki & M-Ridha
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Translocation Factor ◽  
Water Concentration ◽  
Bioaccumulation Factor ◽  
Synthetic Wastewater ◽  
Native Plant ◽  
Range Finding ◽  
Permissible Limits ◽  
River Conservation

This study was aimed to assess the efficiency of N.oleander to remove heavy metals such as Copper (Cu) from wastewater. A toxicity test was conducted outdoor for 65-day to estimate the ability of N.oleander to tolerate Cu in synthetic wastewater. Based on a previous range-finding test, five concentrations were used in this test (0, 50, 100, 300, 510 mg/l). The results showed that maximum values of removal efficiency was found 99.9% on day-49 for the treatment 50 mg/l. Minimum removal efficiency was 94% day-65 for the treatment of 510 mg/l. Water concentration was within the permissible limits of river conservation and were 0.164 at day-35 for the 50 mg/l treatment, decreased thereafter until the end of the observation, and 0.12 at day-65 for the treatment 100 mg/l. the concentrations of water samples exceeded the permissible limits for 300 and 510 mg/l throughout the observation. Bioaccumulation factor (BAF) for N.oleaner was found to be greater than one for all the treatments. Higher translocation factor (TF) were 1.65, 1.73, 2.61 and 2.34 mg/l for 50, 100, 300 and 510 mg/l, respectively. This study revealed that N.oleander can tolerate and treat Cu concentration in wastewater.

scholarly journals Distribution of heavy metals in various compartments of the constructed wetland system in Przywidz

2019 ◽  
pp. 297-305
Author(s):  
Hanna Obarska-Pempkowiak ◽  
Katarzyna Klimkowska
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Point Of View ◽  
Filling Material ◽  
Toxic Heavy Metals ◽  
Wetland System ◽  
Cascade Filter ◽  
The Hill

In the last decade constructed wetlands have become a very popular technology for removal of contaminants from domestic sewage. They are also assesed from the point of view of their capacity for removal of toxic heavy metals and organic substances resistant to degradation. Constructed wetland in Przywidz localized about 60 km from Gdansk is a pilot wastewater treatment plant (WWTP) designed for 150 PE (person equivalent). The system consists of two sections: vegetated submerged bed (VSB) with horizontal flow of sewage and a cascade filter situated on a slope of a hill. Domestic sewage after a conventional pretreatment ( consists of an Imhoff tank and a trickling filter) is pumped to the VSB filter located on slope of the hill. Total area of constructed wetland is about 870 m2. In the period 1995-98 the measurments of several heavy metals (Cd, Cu, Pb) were carried out. These measurments were carried out in inflowing and outflowing sewage and as well in samples collected from each section of constructed wetland system. In particular analysis of sediment collected in ditches of the cascade filter, filling material of the dykes, VSB filter and plants were carried out. It was found out that content of heavy metals in suspended soil decreased along the course of treatment, starting from VSB filter, through the first ditch to the last ditch. Measurable concentration of dissolved heavy metals were found in sewage collected from several subsequent ditches. The main mechanism of removal on particular matter in subsequent ditches was sorption.

Application of Functionalized Nanomaterials as Effective Adsorbents for the Removal of Heavy Metals from Wastewater: A Review

2020 ◽  
Vol 17 (1) ◽  
pp. 4-22
Author(s):  
Saifeldin M. Siddeeg ◽  
Mohamed A. Tahoon ◽  
Norah S. Alsaiari ◽  
Muhamad Shabbir ◽  
Faouzi B. Rebah
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Engineered Nanomaterials ◽  
Complete Analysis ◽  
Toxic Heavy Metals ◽  
Metals Removal ◽  
Functionalized Nanomaterials ◽  
Metal Selectivity ◽  
Removal Of Heavy Metals

Background: Nanomaterials offer promising remediation techniques for water containing toxic pollutants especially heavy metals. Method: A complete analysis of the application of nano-adsorbents for heavy metals removal from water has been reviewed. The effect of their functionalization on the adsorption capacity, the reusability, and the surface area has also been discussed. Result: In particular, the focus was on the applications of graphene oxide, carbon, silica, titanium dioxide, and iron oxide for water treatment. Additionally, the effect of functional groups on heavy metal selectivity has been discussed as well. Conclusion: This article will provide environmental engineers and academicians with information related to the latest engineered nanomaterials employed for the treatment of wastewater containing toxic heavy metals.

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