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Sea buckthorn leaves scrub toxic dyes and chromium from wastewater

PubMed · 2026-07-07

Researchers found that dried leaves from sea buckthorn, a common shrubby plant, can pull harmful textile dyes and toxic chromium out of contaminated water with high efficiency and at low cost, no chemical treatment of the plant material required.

1

Sea buckthorn leaf biomass achieved maximum adsorption capacities of 78.74 mg/g for Methylene Blue, 45.45 mg/g for Congo Red dye, and 106.38 mg/g for hexavalent chromium Cr(VI).

2

Optimal removal occurred at pH 5-6 with a low adsorbent dose of 2 g/L, and equilibrium was reached within 120-180 minutes.

3

Adsorption followed pseudo-second-order kinetics (R² > 0.99) and a Freundlich isotherm, indicating the leaf surface provides multiple heterogeneous binding sites for contaminants.

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