Phytoremediation

noun (uncountable)

/ˌfaɪ.təʊ.rɪˌmiː.diˈeɪ.ʃən/

A form of bioremediation that uses living plants and their associated root-zone microorganisms to remove, degrade, contain, or immobilise contaminants (heavy metals, organic pollutants, radionuclides) from soil and water. Mechanisms include phytoextraction (plant roots absorb contaminants stored in biomass), phytodegradation (enzymes break down pollutants), and rhizofiltration (roots filter contaminants from water). India has research programmes using Vetiver grass, sunflowers, and water hyacinth for arsenic and lead removal from mine-affected soils in Jharkhand and Odisha.

✍️ Usage in a UPSC answer

Pilot trials along the Subarnarekha river basin have trialled sunflower-based phytoremediation to immobilise arsenic contamination from coal-ash ponds, demonstrating a cost-effective alternative to expensive ex-situ chemical treatment.

Synonyms

plant-based remediationbotanical bioremediationgreen remediationphytoextraction (subset)

Antonyms

chemical remediationsoil excavationconventional treatment

🌱 Word Family

phytoremediate (verb), phytoremediator (noun), phytoextraction (noun), rhizofiltration (noun), phytodegradation (noun)

🔡 Root

Greek phyton = plant; Latin re- = again; Latin mederi = to heal; -ation = process

📜 Etymology

The term was formalised in the early 1990s by Ilya Raskin and colleagues at Rutgers University, combining Greek phyton (plant) with remediation. The concept built on earlier observations of hyperaccumulator plants — such as Thlaspi caerulescens — that naturally concentrate heavy metals, documented by botanists as early as the 1970s.

🧠 Memory Hook

PHYTO (plant) + REMEDIATION (healing). Plants are the healers here — they suck up poisons through their roots and store or destroy them. Sunflowers were used after Chernobyl to absorb radioactive caesium: the ultimate phytoremediation image.

🌿 Environment & Ecology 📖 Seen in: Ecology Fundamentals — Ecosystems, Foo...

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