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The Pharmaceutical contaminants specialist antibiotics into environment can create problems for both human health and environment. Ciprofloxacin (CIP), an antibiotic Fluoroquinolones group, has recently been used widely for infections treatment. The main purpose of the research was to develop a Full factorial method for degradation of CIP in aqueous solution by Fenton Homogenous process (Fe2+/H2O2). In order to compare the effects of the four parameters considered in the optimization of the oxidative process, a two level Full factorial experimental design (24) was utilized using JMP® software. These parameters were concentration of CIP ( ), concentration of Fe2+ ( ), concentration of H2O2 ( ) and time ( ) at ambient temperature and an acidic pH. In the optimal conditions of the initial concentration of CIP 80 mg/l, Fe2+ concentration of 5 mM, and H2O2 concentration of 51.2 mM degradation efficiency of CIP was 76% within 15 min. Under these conditions, the highest correlation coefficient proved between observed and predicted degradation efficiencies with R2= 0.996 and Adj-R2= 0.968. The reaction intermediates have been identified by LC-MS and BOD5/COD ratio for study biodegradability enhanced from zero to 0.32, showed that the Fenton Homogenous process was agreeable to biological treatment. Based on the results, this may be concluded that Fenton Homogenous process by Full factorial experimental design could be used to degrade CIP from aqueous solutions efficiently.

This study focuses on the impact of the disposal of Tirunelveli city municipal waste in the quality of groundwater in Ramayanpatti village where the waste is disposed; the study also assesses the quality of the groundwater suitability in irrigation in the disposed region. Tirunelveli city generates municipal waste of nearly 15 MLD of domestic wastewater and 100 tons of solid waste in a day. The domestic wastewater is treated by waste stabilization pond. The solid waste is dumped in the open yard. These two disposal sites are located in the Ramayanpatti area and their boundaries are at a distance of 500m from each other. Ground water resources are extracted in use for agriculture in the area of Ramayanpatti. Around thirty, locations have been identified in the Ramayanpatti area for sampling, based on the contour and flow direction. The dominant chemical cation species in the majority of the groundwater samples are in the order of Na>Ca>Mg>K and anion species are in the order of HCO3>Cl>SO4>NO3. Gibbs plot shows that the region is dominated by evaporation and dilution phenomenon. Rhode’s plot shows that there is no reduction in the rate of infiltration of soil in the Ramayanpatti region. Dendrogram shows that the leachates infiltration is predominant in the winter season. The study shows that the groundwater quality, nearer and to the southeastern side of the disposal sites are most affected and contaminated by solid waste leachates. The inference with various irrigation plots show that the quality of groundwater in the southeastern region is doubtful for use in irrigation and the groundwater needs to be assessed in order to use in irrigation for agriculture.

Presence of metals even at trace levels in natural waters pose sever health risks. Heavy metals are introduced to coastal and marine environments through a variety of sources and activities including sewage and industrial effluents where Black Sea is not different. However, metals behave differently in Black Sea as it an enclosed body. Coastal areas of Turkey face great challenges due to heavy metal contamination caused by rapid urbanization and industrialization. The aim of this study was to investigate the spatial and temporal distributions of total mercury (Hg) in seawater at the mid-Black Sea coast of Samsun, Turkey. The samples were collected from 13 monitoring stations, from the three distances in four seasons during the year 2013. The samples were analyzed for physicochemical parameters along with contamination and enrichment factors. The distribution of Hg is nearly random along the studied coast but obtained values ranges from 0.57 to 12.6 μg/L with an average of 5.24 μg/L were above permissible limits. It was observed that number of samples collected during wet seasons (winter and autumn) with Hg were higher. High enrichment factor 0.331 and contamination factor 25.2 was recorded. Hg present at sampling station M27 was due to point source, a possible ship activity indicated by enrichment factor. The sources responsible for water pollution with Hg are mainly municipal and industrial effluents, leaching, agricultural and pasturage runoff and oil spills. Furthermore, due to unique hydrography of Black Sea, risk of Hg accumulation is high. Interestingly, a direct relation between basicity and Hg concentration was observed. i.e. highest concentration was found on pH 8.33.

Multivariate statistical analysis including cluster analysis, factor analysis and correlation coefficient was applied to the groundwater samples to understand the groundwater condition in Wadi Bani Malik area. Water samples collected from the study area were analysed for physical parameters, major cations and major anions. The groundwater quality is not good in this area and the physicochemical parameters go beyond the acceptable limits of the Kingdom of Saudi Arabia and WHO drinking water standards. The water type in the study area was primarily NaCl. Correlation coefficients were determined among different parameters and then regression analysis was performed to realize the linear relationship between the best correlated parameters. Results of factor analysis specify that factor 1 is dominant and is responsible for 45.5% of the total variance and is dominated by Cl-, Na+, Mg++ and K+. Ground water samples can be divided into four clusters.