4th EucheMs chemistry congress

Poster Session 1
s916
chem. Listy 106, s587–s1425 (2012)
Poster session 1 - Environmental Chemistry
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treAtMent of tABLe oLive ProCeSSinG
wAStewAter By AnodiC oxidAtion
M. J. PACheCo 1 , J. BArBoSA 1 , L. CiriACo 1 , A. LoPeS 1
1 University of Beira Interior, Chemistry, Covilha, Portugal
In Mediterranean countries, olive processing industry
generates wastewaters that contain pollutant compounds. In
Portugal, the storage of olives in large open air tanks, filled with
fresh water, to minimize olive deterioration while waiting for
processing, is a common procedure. This practice yields a dark
colored wastewater with high contents of organic matter, known
by the negative impact on the environment. In fact, these
wastewaters possess high concentration of phenols, which can be
toxic to biological treatments, decreasing their efficiency. In this
context, the introduction of advanced oxidation processes, in
particular, the anodic oxidation with boron-doped diamond
anodes, based on the oxidation of organics by the hydroxyl radical
generated in situ, have been used with success for the degradation
of biorefractory organic compounds.
The aim of this work was to study the electrochemical
oxidation of table olive cleaning and storage wastewaters, using
a boron-doped diamond electrode as anode. The efficiency of the
process was studied under different operating conditions, namely
initial organic load and current densities.
The experiments were conducted in a batch system with
recirculation, using a single compartment electrochemical cell.
All electrochemical experiments were conducted under
galvanostatic conditions, with imposed current densities of 20 and
30 mA cm-2 . The decay in organic content during the assays was
monitored by measurements of COD, TOC and UV-Visible
absorption spectrophotometric analyses.
Although the tested wastewater is a multi-component
solution, it behaves like a single organic synthetic wastewater and
COD removal with time agrees very well with theoretical model
proposed for a single component solution. For all initial organic
load tested, the mineralization was very high.
Acknowledgements: Financial support from Programa
Operacional Regional do Centro 2007-2013 of QREN-
Programa Mais Centro – FEDER for the project CENTRO-01-
CT62-FEDER-002019
Keywords: Table Olive Processing Wastewater; Anodic
oxidation; Boron-doped diamond anode;
4 th EucheMs chemistry congress
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iMPACt of oPen BurninG on PM LeveLS And
CheMiCAL CoMPoSition
A. di GiLio 1 , G. de GennAro 1 , P. dAMBruoSo 1 ,
M. AModio 1 , B. e. dAreStA 1 , A. MArzoCCA 1 ,
A. deMAriniS LoiotiLe 1 , M. tutino 1 , P. JoLAndA 1
1 University Of Bari, Depatment Of Chemistry, Bari, Italy
The burning of pruning waste of olive trees in the field is a
common practice in South of Italy. Since fields are usually close
to densely populated areas, the emissions from biomass burning
may cause seasonally increasing exposure to air pollutants. The
aims of this study is the assessment of the impact of biomass
burning source on the levels and chemical composition of PM10
by comparison to periods when no open fires there were.
The experiments were made in an olive trees field, where
daily PM10 samples were collected by an High Volume Air
Sampler for one week and in two different years. In particular
daily PM10 samples were collected during three days when no
open fires there were and during three days when biomasses were
burned. Moreover, a second High Volume Air Sampler has been
used to collect PM10 samples at a few meters from plume of a
bonfire only during the hours when pruning wastes of olive trees
were burned. Finally, during monitoring campaigns the numerical
particles concentration and the PHAs TOT concentrations have
been determined by an Optical Particles Counters and by a PHAs
Analyzer, respectively. The chemical characterization of PM10
samples was performed in order to determine inorganic
components such as ions and elements, Polycyclic Aromatic
Hydrocarbons (PAHs) and carbonaceous fraction (OC, EC). The
preliminary analysis of collected data showed the relevance of
organic and inorganic tracer species for interpreting the impact of
biomass burning source on PM levels. In fact high concentrations
of OC, Cl, K, Pb, and PAHs, such as benzo(a)anthracene,
benzo(a)pyrene, benzo(K)fluoranthene were observed. Finally, in
this work will be provided the determination of enrichment factors
(EF) for each one element and the evaluation of dimensional
distribution patters of particles involved in biomass burning
events.
Keywords: conbustion; biomass burning; Chemical
characterization;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc