15 An Overview of Natural Water Contamination …
355
freshwater of different lakes in Europe with a frequency of detection of nearly 20%.
Surface water is found to be less contaminated in comparison with ground water,
though triclosan, sulfamethoxazole, and other regional and national level emerging
contaminants are likely to have a comparable range of concentrations which can
be fitted into reconnaissance surveys having different median values. A comparable
value can be estimated from the log-normal distribution of qualitative tracers, where
important numerical estimation of tracers can be evaluated for groundwater dating
and characterization of emerging contaminants (EOC) ratios. Some univariate statistical calculations have been done by previous researchers to calculate the minimum
detection level and intrinsic properties of the target compounds.
Long history of uses of chemicals in North America and Europe resulted into the
appearance of legacy pollutants in the particular depth of water level (>1 m) which
can be crucial for the formulation of pollutant transport dynamics under the regime
of saturated/unsaturated zone. This is very much important to understand that the
attenuation dynamics and cumulative distribution of number of EOC compounds are
significantly different than other comparative studies, for which long-term investigations with more sample sizes and analytical parameters are required. Long-term
migration of high conc. series of contaminants is usually arisen from the event of
wastewater pollution and from the residuals after the treatment techniques of individual molecules. It is observed that with the advancement/evolution of state-of-the
art treatment technology and many other attenuation techniques detection of contaminants in several river basins becomes easier and less time consuming. As a result
of river bank, natural filtration and dilution effect ecological assessment of EOCs
concentration in the range of 10
2 –10
4 ppb-ppt are reported by some authors.
15.1.4 Purpose and Scope of the Present Chapter
There are numerous publications which deal with the environmental behavior of
different pollutants in the soil and water/sediment distribution medium. It is a wellknown fact that source partitioning of such pollutants, coming from different sources
and emission sites has high K d /K ow values and exists in environment due to their
incomplete removal and dissipation process in sewage treatment plants. Usually,
different environmental processes such as conjugation, photo degradation, biodegradation, sorption/desorption, etc. are the common determining factors for the fractions
of metabolized and unmetabolized residues that are percolating in the nearby waterbodies. Although nearly 30–50% of the bound residues are formed due to slow kinetic
action of contaminant dissipation, it is very much important that complete removal
of such noxious chemicals and metabolites lead to the less chances of remobilization
and leaching effect (Das et al. 2015; Kumar et al. 2010).
Though many papers have described the traditional treatment technologies in the
context of environmental cleanup, an iota of publications has discussed the advantages and disadvantages of the suitable technologies along with their societal challenges and process based environmental techniques. In this chapter, our focus is to
355
freshwater of different lakes in Europe with a frequency of detection of nearly 20%.
Surface water is found to be less contaminated in comparison with ground water,
though triclosan, sulfamethoxazole, and other regional and national level emerging
contaminants are likely to have a comparable range of concentrations which can
be fitted into reconnaissance surveys having different median values. A comparable
value can be estimated from the log-normal distribution of qualitative tracers, where
important numerical estimation of tracers can be evaluated for groundwater dating
and characterization of emerging contaminants (EOC) ratios. Some univariate statistical calculations have been done by previous researchers to calculate the minimum
detection level and intrinsic properties of the target compounds.
Long history of uses of chemicals in North America and Europe resulted into the
appearance of legacy pollutants in the particular depth of water level (>1 m) which
can be crucial for the formulation of pollutant transport dynamics under the regime
of saturated/unsaturated zone. This is very much important to understand that the
attenuation dynamics and cumulative distribution of number of EOC compounds are
significantly different than other comparative studies, for which long-term investigations with more sample sizes and analytical parameters are required. Long-term
migration of high conc. series of contaminants is usually arisen from the event of
wastewater pollution and from the residuals after the treatment techniques of individual molecules. It is observed that with the advancement/evolution of state-of-the
art treatment technology and many other attenuation techniques detection of contaminants in several river basins becomes easier and less time consuming. As a result
of river bank, natural filtration and dilution effect ecological assessment of EOCs
concentration in the range of 10
2 –10
4 ppb-ppt are reported by some authors.
15.1.4 Purpose and Scope of the Present Chapter
There are numerous publications which deal with the environmental behavior of
different pollutants in the soil and water/sediment distribution medium. It is a wellknown fact that source partitioning of such pollutants, coming from different sources
and emission sites has high K d /K ow values and exists in environment due to their
incomplete removal and dissipation process in sewage treatment plants. Usually,
different environmental processes such as conjugation, photo degradation, biodegradation, sorption/desorption, etc. are the common determining factors for the fractions
of metabolized and unmetabolized residues that are percolating in the nearby waterbodies. Although nearly 30–50% of the bound residues are formed due to slow kinetic
action of contaminant dissipation, it is very much important that complete removal
of such noxious chemicals and metabolites lead to the less chances of remobilization
and leaching effect (Das et al. 2015; Kumar et al. 2010).
Though many papers have described the traditional treatment technologies in the
context of environmental cleanup, an iota of publications has discussed the advantages and disadvantages of the suitable technologies along with their societal challenges and process based environmental techniques. In this chapter, our focus is to