Influence of salts and phenolic compounds on olive mill wastewater detoxification using superabsorbent polymers.

Dezembro 2004

For a selection of nine commercially available superabsorbent polymers, the absorption capacity was evaluated for the principal absorption-inhibition constituent of OMW, mineral salts and for phytotoxic-components, the phenolic compounds. A double exponential model was established for electrical conductivities ranging 4.2-25,000 microS cm(-1). For solutions of phenolic compounds ranging 0-0.5 g l(-1), a distribution coefficient near unit was achieved, while for OMW, the phenolic compounds were concentrated inside the gel as the distribution coefficient was 1.4. Correction of OMW pH towards neutrality was found to increase the absorption capacity by up to 35%. The phytotoxicity was assessed by the germination of Lepidium sativum. Inhibition in plant growth occurred for all OMW dilutions without superabsorbent polymers application. For 5% of OMW (COD 5 gl(-1) and 200 ppm of phenolic compounds) immobilised in PNa2 (1 gl(-1)), plant growth was promoted being observed a 120% growth germination, thus indicating that olive mill wastewater detoxification occurred.

Autores da comunidade :

• 

  L

  Luísa Teresa Pires Grancho Caetano Davies

  ist30807

• 

  S

  Susete Maria Martins Dias

  ist11939

  Afiliações e fontes

  IST > DBE

  Departamento de Bioengenharia

  IST > CEBQ

  Centro de Engenharia Biológica e Química

  IST > iBB

  Instituto de Bioengenharia e Biociências

  De: orcid

  ID: 63131020

• 

  J

  Júlio Maggiolly Novais

  ist10480

  Afiliações e fontes

  IST > CEBQ

  Centro de Engenharia Biológica e Química

  IST > iBB

  Instituto de Bioengenharia e Biociências

Elsevier

Bioresource Technology

259

268

95

3

10.1016/J.BIORTECH.2004.02.027

environmental-engineering - Engenharia do Ambiente

Palavras-chave

• Olive Mill Wastewaters
• Detoxification
• Superabsorbent polymers
• Phenolic compounds
• Phytoxicity tests

eng - Inglês