Phytofiltration of water polluted with arsenic and heavy metals

Anawar, Hossain M.; García-Sánchez, Antonio-Javier; Alam, Md. Mahabub; Rahman, Mirzanur

doi:10.1504/ijep.2008.019400

Cited by 24 publications

(7 citation statements)

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“…Aquatic plants, including algae, demonstrate a high potential to purify river water, wastewater effluents and contaminated water [52]. The tolerant plants, planted in the riverbank, can purify the river water by absorption, adsorption, accumulation and degradation of contaminants.…”

Section: Phytoremediation Processmentioning

confidence: 99%

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar

Chowdhury

2020

Sustainability

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Selection of appropriate river water treatment methods is important for the restoration of river ecosystems. An in-depth review of different river water treatment technologies has been carried out in this study. Among the physical-engineering processes, aeration is an effective, sustainable and popular technique which increases microbial activity and degrades organic pollutants. Other engineering techniques (water diversion, mechanical algae removal, hydraulic structures and dredging) are effective as well, but they are cost intensive and detrimental to river ecosystems. Riverbank filtration is a natural, slow and self-sustainable process which does not pose any adverse effects. Chemical treatments are criticised for their short-term solution, high cost and potential for secondary pollution. Ecological engineering-based techniques are preferable due to their high economic, environmental and ecological benefits, their ease of maintenance and the fact that they are free from secondary pollution. Constructed wetlands, microbial dosing, ecological floating beds and biofilms technologies are the most widely applicable ecological techniques, although some variabilities are observed in their performances. Constructed wetlands perform well under low hydraulic and pollutant loads. Sequential constructed wetland floating bed systems can overcome this limitation. Ecological floating beds are highly recommended for their low cost, high effectiveness and optimum plant growth facilities.

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Section: Phytoremediation Processmentioning

confidence: 99%

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar

Chowdhury

2020

Sustainability

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“…For Rhizofiltration to be effective, non-efficient metal transporters (as metal transport to the shoot makes rhizofiltration less efficient) and plants with extensive root system (e.g. Eucalyptus globulus, Acacia tortilis, Faidherbia albida) (Anawar et al, 2008) are to be chosen. Although to treat surface contaminated water, plants with shallow roots like grasses, Indian mustard or ferns can be used.…”

Section: Phytofiltrationmentioning

confidence: 99%

Critical review on arsenic: Its occurrence, contamination and remediation from water and soil

Meghana

Sayantan

2021

JANS

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With the increasing pollution in today’s world, importance is being given to solve a problem and do it in a sustainable, eco-friendly manner. Arsenic is a class-1 carcinogen and also causes many other side effects to humans, plants and animals. The utilization of arsenic as wood preservatives, pesticides, or its historical overuse by some military units for rice killing operations has led to the increase in the toxic effects of arsenic like its carcinogenicity, decreased immune response etc. Although conventional methods like coagulation, lime softening, adsorption, membrane technology are effective, they have their disadvantages like additional waste generation, causing increased pollution and are expensive. The better alternative is phytoremediation. Appropriate plants like Brassica juncea, Hydrilla verticilata, Pteris vittata L., Vallisneria natans, can be chosen based on the method of the remediation like phytoextraction, phytostabilization and phytofiltration or phytovoltalization. This review provides the list of a few plants which can be likely chosen for the purpose of both water and soil remediation. Advancements are occurring in bioremediation studies with the development of transgenic plants like transgenic tobacco, transgenic Arabidopsis thaliana for better phytoremediation. Understanding the mechanism employed by the plant for its uptake/detoxification can aid in the enhancement of the process of remediation with the external supply of phosphorus. Along with this, the proper and safe disposal of plants is crucial for the remediation process. In addition, awareness of this solution to the general public is to be made for its effectiveness.

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“…Aquatic plants found suitable for phytofiltration are: Pistia stratiotes (Anderson et al, 1993), Spirodela polyrrhiza (Anderson et al, 1993), Myriophyllum aquaticum (Zayed et al, 1998), Ludwigina palustris (Harguinteguy et al, 2013), Mentha aquatic (Anawar et al, 2008), Eichhornia crassipes and Centella asiatica (Zurayk et al, 2003). Moreover, terrestrial plants such as Brassica juncea (Mokhtar et al, 2011) and Helianthus annuus (Raskin and Ensley, 2000) are more preferred than aquatic plants in phytofiltration because their great biomass and longer, faster-growing root systems than aquatic plants.…”

Section: Rhizofiltrationmentioning

confidence: 99%

Phytoremediation technology, plant response to environmental contaminants and the need for soil augmentation

et al. 2020

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Contaminants in the environment occur naturally and/or through anthropogenic activities. These contaminants become a threat to all living organisms because of their increased in the environment and non-biodegradable nature. In order to protect the environment from these contamination, various techniques have been developed, and among them is phytoremediation. Phytoremediation is a technology that employed plant species for reclaiming contaminated soil, air, and water. This technology has been widely accepted in recent times, because of its low cost and environmentally friendly. In addition, augmentation of the contaminated soil, either chemo augmentation or bioaugmentation, have been used for the effective absorption of some of these contaminants. When the plants are grown in the contaminated sites, the contaminant in the soil maybe removed, immobilized, degraded or volatized. These phytoremediation technologies are: phytoextraction, phytovolatilization, rhizofiltration, phyto-stimulation, phyto-stabilization and phytodegradation. Based on the phytoremediation potentials of plants, pollutants are being removed from the environment thereby keeping the environment safe.

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Phytofiltration of water polluted with arsenic and heavy metals

Cited by 24 publications

References 0 publications

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Critical review on arsenic: Its occurrence, contamination and remediation from water and soil

Phytoremediation technology, plant response to environmental contaminants and the need for soil augmentation

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