What question did this study set out to answer?

To evaluate the efficacy and chemical mechanisms of protonated brown seaweed (Ecklonia sp.) biomass in reducing and removing toxic hexavalent chromium from synthetic wastewater.

August 4, 2004Environmental Science & Technology

Reduction of Hexavalent Chromium with the Brown SeaweedEckloniaBiomass

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To evaluate the efficacy and chemical mechanisms of protonated brown seaweed (Ecklonia sp.) biomass in reducing and removing toxic hexavalent chromium from synthetic wastewater.
Treated synthetic Cr(VI) wastewater with protonated Ecklonia sp. biomass across an experimental pH range of 1 to approximately 5.
Quantified reaction kinetics, proton consumption ratios, and total chromium removal across varying contact times and pH conditions.
Cr(VI) removal efficiency was 100% across pH 1 to ~5, with one gram of biomass reducing 4.49 ± 0.12 mmol of Cr(VI).
Cr(VI) was completely converted to Cr(III) through an irreversible reaction that consumed protons at a ratio of 1.15 ± 0.02 mol protons per mol Cr(VI), with reaction rates accelerating as pH decreased.
Total chromium removal achieved an optimum at approximately pH 4 upon reaction completion, driven by the oxidation of organic functional groups on the biomass.

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Implication

Laboratory study demonstrates complete reduction of hexavalent chromium to less toxic trivalent chromium using brown seaweed biomass, suggesting an inexpensive approach for wastewater treatment.

Cite This Study

Park et al. (2004) studied this question.

synapsesocial.com/papers/6a72268e2163a0a01bc5f547 https://doi.org/10.1021/es035329+

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Implication

Laboratory study demonstrates complete reduction of hexavalent chromium to less toxic trivalent chromium using brown seaweed biomass, suggesting an inexpensive approach for wastewater treatment.

Reduction of Hexavalent Chromium with the Brown SeaweedEckloniaBiomass

Key Points

Discussion

Implication

Cite This Study

Reduction of Hexavalent Chromium with the Brown SeaweedEckloniaBiomass

Key Points

Discussion

Implication

Cite This Study

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