Lúcia Silva
Universidade da Beira Interior, Química (Chemistry), Faculty Member
Biodegradability enhancement and detoxification of cork boiling wastewater (CBW) are required for the successful implementation of biological treatment options. We studied the possibility of achieving these goals through ozonation... more
Biodegradability enhancement and detoxification of cork boiling wastewater (CBW) are required for the successful implementation of biological treatment options. We studied the possibility of achieving these goals through ozonation pre-treatment by experimenting on the effect of ozone dose and pH. The CBW used had a pH of 5.81, a chemical oxygen demand (COD) of 1,865 mg L1, a biochemical oxygen demand (BOD5) of 498 mg L1 and total phenol (TP) and tannin compounds concentrations of 523 and 399 mg L1, respectively. The ozone doses ranged from 0.27 to 2.63 for the O3(applied)/COD0 ratios with samples at natural pH and set to 3.33 and 9.96. Ozonation allowed the BOD20/COD ratio (biodegradability index) to increase from 0.37 to 0.63 and a toxicity reduction from 3.08 to 1.24 TU (Microtox). The corresponding removals obtained were 15.2–62.0%, 38.4–83.2% and 56.7–92.1% for COD, TP and colour, respectively. The best outcome of ozonation pre-treatment requires O3(applied)/COD0 ratios over 1.5 and an acid pH. The increase of TP removals with ozone dose at acid pH led to biodegradability enhancement and CBW detoxification. However, for similar conditions the highest COD removals were obtained at alkaline pH due to the hydroxyl radicals’ high oxidation ability but lack of selectivity.
Research Interests: Environmental Engineering, Chemical Engineering, Civil Engineering, Environmental Science, Chemical Education, and 104 moreEnvironmental Education, Water, Environmental Studies, Water quality, Water resources, Water and wastewater treatment, Bioremediation, Water Engineering, Environmental Management, Wastewater Treatment, Chemical, Energy and Environment, Sustainable Water Resources Management, Environmental Chemistry, Soil and Water Engineering, Ozonation, Environmental Sustainability, Water Resources engineering, Water Pollution, Aquaculture, Water Resources Management, Industrial wastewater Treatment, Biological Engineering, Integrated Water Resources Management, Chemical and Biological Engineering, Water Resources and Environmental Engineering, Bioremediation of wastewater, Irrigation water Management, Civil Society, IT in civil and environmental engineering, Educación Ambiental, Chemicals, Educação Ambiental, Wastewater, Toxicity, Derecho Ambiental, Saneamiento Ambiental, Tratamiento de aguas, Water and Wastewater, Ciencias Ambientales, Bioremediation and Environmental microbiology, Water and Sanitation, Biological Wastewater Treatment, Meio Ambiente, Water, Sanitation, and Hygiene, Ambient Media, Manual de Construcción de Reservorios de Agua de Lluvia, Bioreactor Design and Optimization, Medio Ambiente, Environmental Enginering, Water Supply and Sanitary Engineering, Gestão Ambiental, civil Engineer, Engenharia Ambiental, Water quality, wastewater reuse, integrated water resources management, water resources pollution, emerging pollutants in water, soil and groundwater, Caracterizaciones ambientales, Ozonation and Biodegradation of Azo Dyes, Environmental Science & Engineering, Groundwater Quality, Calidad De Agua, Indices de calidad de agua, Civil Engineerig, Calidad Del Agua, Contaminación del Agua, Agua, Ingeniería Sanitaria, Sanitation, Ingeniería Ambiental, Chemical and Environmental Engineering, Objetivos sanitarios 2010-2020, Engenharia Civil, Engenharia Civil, Chemical Engeneering, Procesos De Bioremediacion, CHEMICAL ENGINNERING, Valor costo y tarifas del agua, Proyecciones De Demandas De Agua, Tratamiento De Aguas Residuales, Civil Enginering, Chemical Engineer, Water Supply and Sanitation, Agricultural and Environmental Engineering, Civil & Environmental Engineering, Biodegradability, Ingenieria Sanitaria, Engenharia do Ambiente, Civil and Environmental Engineering, chemical and biological processes in environmental Engineering and Management, Sanitasi, Sanitary Engineering,irrigation Engineering,intergrated Water Resources Managenent, Sanitário, Sanitary Engineering, Sustainable Water & Sanitation, Gestión Integrada Del Agua, Environmental Enginneering, Geo Environmental Engineering, Sanitary and Environmental Engineering, Chemical Enggineering, Environmental Science and Engineering, Conservacion De Suelo Y Agua, Cork Wastewater, Biological Systems Engineering, Civil Engg, Engenharia Sanitária e Ambiental, and Chemical and Biomolecular/Biological Engineering
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested. A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid... more
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested. A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid... more
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested. A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid... more
A new diterpenic lactone has been synthesized starting from ent-hydrohalimic acid and its biological activity has been tested.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A new dilactone 1 (5-epi-13-ent-halimen-18,10;15,16-diolide) has been synthesized from ent-hydrohalimic acid 3.
A bicyclic diterpene triol with a new rearranged labdane carbon skeleton was isolated from the aerial parts of Halimium viscosum (Willk.) Pinto da Silva (S. João da Pesqueira). Its structure was established by FAB MS and two-dimensional... more
A bicyclic diterpene triol with a new rearranged labdane carbon skeleton was isolated from the aerial parts of Halimium viscosum (Willk.) Pinto da Silva (S. João da Pesqueira). Its structure was established by FAB MS and two-dimensional NMR experiments (1H/1H, 1H/13C) and its stereochemistry by NOE and X-ray study.
A bicyclic diterpene triol, 5, with a new rearranged labdane carbon skeleton was isolated from the aerial parts of Halimium viscosum (S. João da Pesqueira). Its structure was established by FAB MS and two-dimensional NMR experiments and its stereochemistry by NOE and X-ray study.
A bicyclic diterpene triol, 5, with a new rearranged labdane carbon skeleton was isolated from the aerial parts of Halimium viscosum (S. João da Pesqueira). Its structure was established by FAB MS and two-dimensional NMR experiments and its stereochemistry by NOE and X-ray study.