sludge amended soils are transferred to the plant through uptake by root, retention by
root, leaves uptake, translocation, and animal intake. Many scientists showed the
adverse effect of antibiotics on plant activities like growth rate, nitrogen, fixation,
heterocyst formation, and bioaccumulation (Forni et al. 2002; Migliore et al. 2003).
From the plants they reach to animals and get accumulated into their body tissues
and consequently lead to food chain contamination. Soil characteristics such as
sorption kinetics, pH, and organic matter affect accumulation of pharmaceutical
compound in the soil (Jjemba 2002). The leaching of pharmaceuticals to the
groundwater can be prevented by sorption, and may reduce the effect of antibiotics
on soil microbes (Kotzerke et al. 2008; Bialk-Bielinska et al. 2012), as well as, it
plays an important role in drug plant uptake, which is determined upon the hydroponic conditions (Wu et al. 2015). Organic content of soli is another factor affection
pharmaceuticals uptake by plants. The uptake ability is decreased when the organic
component of soil is increased; however, under normal farming conditions, the
potential uptake is low (Holling et al. 2012).
Chemical substances used in aquaculture may directly release to the surface
water, whereas veterinary drugs in soil may have the potential to discharge to surface
water or reach the aquifers (Tarazona and Vega 2002). The exposure route of
pharmaceuticals and veterinary medicines in aquacultures are variable, one possible
source is the food chain of animals that accumulate drugs in their tissues. Another
possible route is the crop with significant levels of accumulated medicines from
manure or soil; fish with accumulated drugs used for aquaculture treatment purposes
and the main source is contaminated ground and wastewater. In a study, Guo et al.
(2016) reported that tetracyclines are common veterinary medicines in livestocks in
China, where it was found in animal manure with very high concentration of about
5775.6 mg kg
À1 , indicating that the livestock is the main source of contamination of
aquatic culture.
3.5 The Hazardous Impact of Antibiotics
in the Environment
The presence and occurrence of pharmaceuticals in the environment have been
shown through many studies. The rate of entrance in to the environment is more
than the rate of removal and antibiotics are considered to be persistent of pseudopersistent (Mackay et al. 2014). The toxic effect of antibiotics involves all biotic
compartments including microbial community, animal, plant and humans (Madden
et al. 2009). Generally, the sequences of the negative action of antibiotics occur at
the molecular level firstly, then to the cellular levels, organism level, individual
level, population level, community level, and finally at ecosystem level. The sensitivity at the DNA level is considered as the most accurate and effective bioindicator
for toxicity of pollution in the soil. The genotoxicity and antibiotic stress could be
3 Existence of Antibiotics in Wastewater as a Pollution Indicator
57
root, leaves uptake, translocation, and animal intake. Many scientists showed the
adverse effect of antibiotics on plant activities like growth rate, nitrogen, fixation,
heterocyst formation, and bioaccumulation (Forni et al. 2002; Migliore et al. 2003).
From the plants they reach to animals and get accumulated into their body tissues
and consequently lead to food chain contamination. Soil characteristics such as
sorption kinetics, pH, and organic matter affect accumulation of pharmaceutical
compound in the soil (Jjemba 2002). The leaching of pharmaceuticals to the
groundwater can be prevented by sorption, and may reduce the effect of antibiotics
on soil microbes (Kotzerke et al. 2008; Bialk-Bielinska et al. 2012), as well as, it
plays an important role in drug plant uptake, which is determined upon the hydroponic conditions (Wu et al. 2015). Organic content of soli is another factor affection
pharmaceuticals uptake by plants. The uptake ability is decreased when the organic
component of soil is increased; however, under normal farming conditions, the
potential uptake is low (Holling et al. 2012).
Chemical substances used in aquaculture may directly release to the surface
water, whereas veterinary drugs in soil may have the potential to discharge to surface
water or reach the aquifers (Tarazona and Vega 2002). The exposure route of
pharmaceuticals and veterinary medicines in aquacultures are variable, one possible
source is the food chain of animals that accumulate drugs in their tissues. Another
possible route is the crop with significant levels of accumulated medicines from
manure or soil; fish with accumulated drugs used for aquaculture treatment purposes
and the main source is contaminated ground and wastewater. In a study, Guo et al.
(2016) reported that tetracyclines are common veterinary medicines in livestocks in
China, where it was found in animal manure with very high concentration of about
5775.6 mg kg
À1 , indicating that the livestock is the main source of contamination of
aquatic culture.
3.5 The Hazardous Impact of Antibiotics
in the Environment
The presence and occurrence of pharmaceuticals in the environment have been
shown through many studies. The rate of entrance in to the environment is more
than the rate of removal and antibiotics are considered to be persistent of pseudopersistent (Mackay et al. 2014). The toxic effect of antibiotics involves all biotic
compartments including microbial community, animal, plant and humans (Madden
et al. 2009). Generally, the sequences of the negative action of antibiotics occur at
the molecular level firstly, then to the cellular levels, organism level, individual
level, population level, community level, and finally at ecosystem level. The sensitivity at the DNA level is considered as the most accurate and effective bioindicator
for toxicity of pollution in the soil. The genotoxicity and antibiotic stress could be
3 Existence of Antibiotics in Wastewater as a Pollution Indicator
57