Physicochemical parameters aid microbial community? A case study from marine recreational beaches, Southern India

In this study, the sea water and sediment samples of four different locations were collected from Palk bay regions during 2014 for pollution indicators study. All the bacterial parameters were higher during the rainy season compared to summer season in all the sampling locations of the Palk bay regions. In the water samples, among the pollution indicator bacterial groups, TC and TS counts were highest 0.67 -10.3 [×10 3 ] ml −1 and 0.8 -10.8 [×10 2 ] ml −1 during monsoon, and the least 0.54 -8.5 [×10 3 ] ml −1 and 0.7 -9.0 [×10 2 ] ml −1 were noticed during summer. In monsoon sediment sample, the higher VC count was observed in Thondi (2100 g −1 ) followed by Mimisal (1700 g −1 ), Manamelkudi (960 g −1 ) and Devipattinam (200 g −1 ). The pollution index (PI) of each location was calculated and was showed a remarkable microbial contamination was observed in sediment sample than water sample. The order of PI observed were Thondi > Mimisal > Manamelkudi > Devipattinam. The highest PI ratio (15.5) was observed in Devipattinam sediment sample at monsoon season while lowest (2.5) was noticed in Devipattinam water sample at summer season. The results indicated that the coastal environment is highly exposed to human excreta that suggesting to avoid direct contact. Hence, throughout impoundment is needed to protect coastal environments.

Section: Bacteriological Analysismentioning

confidence: 99%

Prevalence of pollution indicators in Palk bay coastal zone, Southern India

Meera¹

2016

“…The sampling sites were choosed based on the massive discharges of pollutants into river. The river water samples were collected from 0 to 20 cm below the surface [11] [12]. The 2000 mL of water samples were collected with a 2500 mL sterile container in each location and stored in ice box at 4 °C.…”

Section: Samplingmentioning

confidence: 99%

Assessment of multi-metal resistant bacteria from Periyar river, Southern India

Prasanth¹,

Mahesh²

2016

A total of thirty bacterial strains were isolated from the water and sediment samples of Periyar River during premonsoon 2015 for multi-metal resistant study. In this study, the bacterial isolates were challenged against three different concentrations (10, 100 and 200 mM) of copper and chromium metal salt solution by using of plate diffusion method. Most of the isolates from Periyar River were resistant to minimum concentration of the both metal solutions. Nearly, 93.3 % were resistant to copper solution whereas 90.0 % were resistant to chromium solution. In 200 mM of Cu, 46.7 % of the populations showed growth rates between 71-80%, whereas 3.3 % of the populations were observed with a 51-60 % growth rate. At 200 mM Cr, 6.7 % of the populations showed 51-60 % growth rate. A growth rate between 61-70 % was observed for 13.3 % of the bacterial populations at 200 mM of Cr, whereas no population was growing at a growth rate of 0-50 % with 200 mM of Cr. The results indicated that the river received various pollution sources throughout the river-line. The sensitivity nature of the bacterial isolates against metal solutions were varied depend on the concentrations of the metal solutions. Hence, the river needed throughout impoundment for maintaining sanitation.

“…The physiochemical parameters, i.e., pH, electrical conductivity (EC), total dissolved solids (TDS) and salinity were measured using field kit (Thermo Orion 5-Star pH Multi-Meter) on the site and the concentrations of soluble cations, anions and nutrients (around 15 parameters) were determined according to the standard methods [12][13][14]. All samples were collected with precautions required for all analysis, held on iceboxes and processed within 6 h of collection.…”

Section: Physiochemical Analysismentioning

confidence: 99%

“…After incubation, the final counts of colonies were noted and all trials were performed in triplicate. For confirmation of the pathogens, typical colonies were inoculated into Rapid Microbial Limit Test kits recommended for diagnostic microbiology supplied by Hi-media Laboratories Limited [13] [14]. Each bacterial group, color, incubation time and specific media was listed in Table 1.…”

Section: Bacteriological Analysismentioning

confidence: 99%

Assessment of physiochemical, heavy metal and indicator bacterial groups in water and soil samples of different oil contaminated regions, Tiruchirappalli city

Vinothini

Ravikumar

2016

The levels of physiochemical, heavy metal and microbiological pollution in different oil contaminated regions of Tiruchirappalli city were reported in the study. The water and sediment samples from four different oil contaminated regions in Tiruchirappalli city were collected during monsoon 2015. The sampling regions were divided into two category such as heavy oil contaminated regions (oil shed / oil washed regions) and bus stand regions. In oil contaminated water sample, the ranges of pH, TDS, EC, DO, BOD, COD, TA, TH, Ca, Mg, Na, K, HCO 3 , CO 3 , Cl, SO 4 , N-NO 2 , O-PO 4 and oil-grease were 7.4-8.4, 395.4-651.4 mg/L, 670.2-1104.1 μS/cm, 0-1, 3. 4-6.4, 5.5-76.9, 14.2-17.4, 74.5-165.4, 24.4-159.9, 16.0-81.5, 8.4-78.4, 24.5-66.3, 21.5-48.9, 86.7-161.4, 0 -0, 79.5-145.2, 48.5-115.6, 2.3-15.2, 6.2-14.4 and 7.9-15.4 mg/L, respectively. But in soil sample, the ranges of Cd, Cr, Cu, Fe, Ne Pb and Zn were 0.14-0.65, 0.11-0.22, 0.19-0.52, 0.91-3.46, 0.1-0.2, 0.12-0.22, 0.65-1.82 mg/kg, respectively. In oil contaminated water sample, counts of TVC, TC, TS, FC, FS, VC, SAC, SHC and PC were in the range of 21300-126000, 1620-13200, 240-1050, 250-1130, 100-250, 120-180, 80-160, 130-200 and 260-560 CFU/mL, respectively. In soil sample, the TVC, TC, TS, FC, FS, VLO, SC and PC ranges were 56000-218000, 3100-14800, 350-1260, 330-1420, 150-300, 110-240, 120-200, 160-260 and 410-1060 CFU/g, respectively. The results of this study indicated that oil shed regions got higher pollutions than bus stand regions. This study gave a special emphasis on the determination of the levels of pollution and also identified the vulnerable regions. Hence, throughout impoundment and continuous monitoring is needed.