scholarly journals Experimental investigation of water quality responses to inorganic pollutants for the establishment of a contamination warning system

2019 ◽  
Vol 19 (7) ◽  
pp. 1965-1977
Author(s):  
Sukmin Yoon ◽  
Seong-Su Kim ◽  
No-Suk Park
Keyword(s):  
Water Quality ◽  
Tap Water ◽  
Pure Water ◽  
Warning System ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Residual Chlorine ◽  
Inorganic Pollutants ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

Abstract In this study, batch and simulated pipeline experiments were conducted to investigate the response of water quality parameters (pH, conductivity, residual chlorine, turbidity, total organic carbon, UV 254, and oxidation reduction potential (ORP)) to various concentrations of four inorganic pollutants (Cd, Cr, Mn, and Pb). In addition, the possibility of detecting incidents of contamination in the actual water supply system was evaluated by deriving the response intensities of each factor to the concentrations of the pollutants. As a result, pH and ORP were identified as the major water quality parameters responsive to the four inorganic pollutants in this study. The responses were more intense (more sensitive) in pure water than in tap water. The results of the batch and simulated pipeline experiments for tap water showed almost identical tendencies, except for the second level of Mn injection (concentration 0.5 mg/L).

scholarly journals Using simple and easy water quality parameters to predict trihalomethane occurrence in tap water

Chemosphere ◽  
2021 ◽  
pp. 131586
Author(s):  
Zeqiong Xu ◽  
Jiao Shen ◽  
Yuqing Qu ◽  
Huangfei Chen ◽  
Xiaoling Zhou ◽  
...  
Keyword(s):  
Water Quality ◽  
Tap Water ◽  
Quality Parameters ◽  
Water Quality Parameters

scholarly journals Research of tap water quality parameters in the city of kherson by chemical methods

2019 ◽  
Vol 2 ◽  
pp. 134-143
Author(s):  
O.V. Ohrіmenko ◽  
◽  
T.A. Bila ◽  
Ye.V. Liashenko ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Tap Water ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Chemical Methods ◽  
Tap Water Quality ◽  
The City

scholarly journals SOFTWARE FOR CALCULATING A WATER QUALITY INDICATOR SPECIFIC TO THE AMAZON REGION

2021 ◽  
Vol 9 (3) ◽  
pp. 248-261
Author(s):  
A. M. F. de Souza ◽  
S. F. P. Pereira ◽  
L. P. Santos ◽  
C. S. e Silva ◽  
R. M. Rocha ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Indicator ◽  
Quality Parameters ◽  
Web Interface ◽  
Natural Ecosystems ◽  
Water Quality Indicator ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

The quality of the water in the Amazon's reservoirs is of fundamental importance for natural ecosystems, biota, and for the region's population. Maintaining the water quality involves long-term monitoring programs established by the requirements of Brazilian legislation. A web interface may facilitate the use of monitoring results routinely, which allows periodic insertion of previously selected water quality parameters results, to finally provide a simple and direct way to evaluate the water quality. The general objective of this study was to develop a software based on a water quality indicator (WQI) system considering chemical, physical-chemical, and biological parameters evaluated in four seasonal periods in Samuel dam. Multivariate analysis was used to select 10 significant variables (oxidation-reduction potential, dissolved oxygen, total dissolved solids, chlorophyll a, phosphate, Ba, Ca, Fe, Na, and Sn). The web software added innovation to the project, enabling to storage of data from analysis of field-collected samples in an organized and safe way in a database, in addition to speeding up the calculation of the WQI, making it possible to classify the water quality more quickly and accurately.

scholarly journals Water quality trend analysis in a citywide water distribution system

2021 ◽  
Author(s):  
Keya Chowdhury ◽  
Aysha Akter
Keyword(s):  
Water Quality ◽  
Distribution System ◽  
Water Distribution ◽  
Oxygen Demand ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Residual Chlorine ◽  
Secondary Source ◽  
Pipe Material ◽  
Rapid Urbanization

Abstract Rapid urbanization poses challenges to meet the increased water supply demands. Apart from the quantity, the distributed water quality often fails to meet the permissible level. This study aimed to conduct a citywide spatio-temporal variation of water quality parameters. Water sampling points were selected by applying the Analytical Hierarchical Process (AHP) technique using ArcGIS considering pipe leakage, source water quality, pipe age, and pipe materials. The Chattogram city comprises 397 km of pipes; pipe material distribution shows 71.28% PVC, 20.94% asbestos, 5.16% mild steel, 2.17% ductile, and 0.45% cast iron. The citywide pipe network was established in 1963; 20.87% of pipes aged over 30 years, 15.07% 20–30 years, 26.38% 10–20 years, and 37.68% pipelines are relatively new, i.e., within 0–10 years. Eight water quality parameters, i.e., pH, temperature, turbidity, biochemical oxygen demand after five days (BOD5), total coliform, fecal coliform, chloride, and residual chlorine, were collected from the secondary source cross-checked by field survey. Computation of the Water Quality Index (WQI) was interpolated using Inverse Distance Weighted (IDW) method to generate a WQI map. Thus, this study could be a basis to improve the treatment system and proper distribution network maintenance.

scholarly journals Evaluasi Kondisi Lingkungan Akuakultur Pada DAS Tondano Di Kelurahan Ternate Baru Kota Manado

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Dolvinus Wakman ◽  
Suzanne L Undap ◽  
Indra Salindeho
Keyword(s):  
Water Quality ◽  
Quality Standard ◽  
Quality Parameters ◽  
Quality Analysis ◽  
Temperature Conductivity ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Quality Water ◽  
Physical And Chemical

In this study, we evaluated the current condition of the environmental conditions of aquaculture on watershed Tondano River in terms of physical and chemical parameters. Determination of sampling points at each station is placed vertically at three predetermined points from the brigde toward the front of the aquaculture, the distance between one point to the next point was ± 50 m; whereas for the analysis of water quality parameters was done using an HORIBA water quality meters type U-536. Determination points were done by purposive sampling which refers to the physiographic location wherever possible in order to represent or describe these waters. The research was carried out for 3 weeks and was done in 3 stages, morning, afternoon and evening. For direct measurement (in situ) was performed once a week at the three points which included parameters pH, temperature, conductivity, DO, Oxidation reduction potential, turbidity, TDS, depth and GPS. Generally, the result of water quality analysis at the aquaculture still in the water quality standard PP No.82 of 2001. Keywords: Evaluation, water quality, water Lake Tondano, Aquaculture

scholarly journals Degradation of Thiol Collectors Using Ozone at a Low Dosage: Kinetics, Mineralization, Ozone Utilization, and Changes of Biodegradability and Water Quality Parameters

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 477 ◽  
Author(s):  
Pingfeng Fu ◽  
Xiaofeng Lin ◽  
Gen Li ◽  
Zihao Chen ◽  
Hua Peng
Keyword(s):  
Water Quality ◽  
Degradation Kinetics ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Utilization Rate ◽  
Solution Ph ◽  
Flotation Reagents ◽  
Oxidation Reduction ◽  
Degradation Behaviors ◽  
Low Dosage

Ozonation at a high O3 dosage can achieve high efficiencies in removing flotation reagents but it has a low ozone-utilization rate. The ozonation of potentially toxic thiol collectors (potassium ethyl xanthate (EX), sodium diethyl dithiocarbamate (SN-9), O-isopropyl-N-ethyl thionocarbamate (Z-200) and dianilino dithiophoshoric acid (DDA)) was investigated in an ozone-bubbled reactor at a low O3 dosage of 1.125 mg/(min·L). The degradation kinetics, mineralization, ozone utilization, changes of biodegradability, and water quality parameters were studied, and the degradation behaviors of four collectors were compared. Thiol collectors could be effectively degraded with a removal ratio of >90% and a mineralization ratio of 10‒27%, at a low O3 dosage. The ozonation of thiol collectors followed the pseudo first-order kinetics, and rate constants had the order of kSN-9 > kEX > kZ-200 > kDDA. The Z-200 and DDA were the refractory flotation reagents treated in the ozonation process. After ozonation, the biodegradability of EX, SN-9, and DDA solutions was remarkably raised, but the biodegradability of Z-200 only increased from 0.088 to 0.15, indicating that the Z-200 and its intermediates were biologically persistent organics. After ozonation, the solution pH decreased from 10.0 to 8.0‒9.0, and both the conductivity and oxidation-reduction potential increased. The ozone utilization ratio in decomposing thiol collectors was above 98.41%, revealing almost complete usage of input O3. The results revealed that thiol collectors could be effectively degraded by O3, even at a low dosage, but their degradation behaviors were quite different, due to intrinsic molecular properties.

scholarly journals Monitoring Water Quality Parameters in Egyptian Tap Water

2019 ◽  
Vol 28 (4) ◽  
pp. 2815-2821
Author(s):  
Thabet Sakran ◽  
Pessant Matooq ◽  
Gamal Shahawy ◽  
Maisa Shalaby ◽  
Hoda Sabry ◽  
...  
Keyword(s):  
Water Quality ◽  
Tap Water ◽  
Quality Parameters ◽  
Water Quality Parameters

scholarly journals Dampak Kualitas Air Pada Budi Daya Ikan Dengan Jaring Tancap Di Desa Toulimembet Danau Tondano

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Pilipus A Urbasa ◽  
Suzanne L Undap ◽  
Robert J Rompas
Keyword(s):  
Water Quality ◽  
Fish Farming ◽  
Quality Standard ◽  
Quality Parameters ◽  
Quality Analysis ◽  
Temperature Conductivity ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Physical And Chemical

In this study, we determined the current condition of the water quality of Lake Tondano in terms of physical and chemical parameters in a fish farming locations on Lake Tondano of Toulimembet village waters. Determination of sampling points at each station is placed vertically at three predetermined points from the guard house toward the front of the net, the distance between one point to the next point was ± 12 m; whereas for the analysis of water quality parameters was done using an HORIBA water quality meters type U-536. Determination points were done by purposive sampling which refers to the physiographic location wherever possible in order to represent or describe these waters. The research was carried out for 3 weeks and was done in 3 stages, morning, afternoon and evening. For direct measurement (in situ) was performed once a week at the three points which included parameters pH, temperature, conductivity, DO, Oxidation reduction potential, turbidity, TDS, depth and GPS. Generally, the result of water quality analysis at the aquaculture still in the water quality standard PP No.82 of 2001. Keywords: Water Quality, Stick Net Cage, Lake Tondano, Aquaculture

scholarly journals Investigating the occurrence of algae in the drinking water supply system of Harare, Zimbabwe

2020 ◽  
Vol 10 (2) ◽  
pp. 179-190
Author(s):  
Pardon Dandadzi ◽  
Zvikomborero Hoko ◽  
Tamuka Nhiwatiwa
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Distribution System ◽  
Quality Parameters ◽  
Supply System ◽  
Water Quality Parameters ◽  
Residual Chlorine ◽  
Raw Water

Abstract This study assessed the quality of drinking water in the water supply system for the City of Harare (Zimbabwe) by investigating the occurrence of algae and other water quality parameters that affect its growth. At Morton Jaffray Water Treatment Works (MJWTWs), samples were collected from the raw water inlet and treated water outlet points. In the distribution system, samples were collected from selected sites and grouped into four zones (1, 2, 3 and 4). The algal taxonomic groups that were found in both raw and treated water comprised of Cyanophyceae, Chlorophyceae, Bacillariophyceae, Euglenophyceae and Dinophyceae. It was found out that Microcystis aeruginosa followed by Anabaena were the most abundant species in both raw water and in the distribution system. All measured water quality parameters were within the Standards Association of Zimbabwe and WHO guideline values except for chlorine which had an average residual chlorine concentration that was lower than the WHO recommended lower value of 0.2 mg/L in parts of Zone 2. Morton Jaffray Water Treatment Works does not completely remove algae, and there is a carry-over of algae into the distribution system. Boosting of chlorine is recommended for Zone 2 that had residual chlorine less than the WHO minimum threshold of 0.2 mg/L.

scholarly journals Occurrence of trihalomethane in relation to treatment technologies and water quality under tropical conditions

2018 ◽  
Vol 1 (1) ◽  
pp. 69-83
Author(s):  
A. A. G. D. Amarasooriya ◽  
S. K. Weragoda ◽  
M. Makehelwala ◽  
R. Weerasooriya
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Residual Chlorine ◽  
Treatment Technology ◽  
Tropical Conditions ◽  
Treatment Technologies ◽  
Resident Time ◽  
By Products

Abstract Distribution of most prevalent disinfection by-products, trihalomethanes (THMs) in relation to treatment technology and common water quality parameters (turbidity, conductivity, color, pH, and residual chlorine) was examined for two water supply schemes (WSS) in Sri Lanka (locations: Greater Kandy-WSS (GKWSS) (80.56–80.66 °E, 7.28–7.38 °N) and Kandy South-WSS (KSWSS) (80.49–80.63 °E, 7.21–7.30 °N). In both treatment plants, only CHCl3 and CHCl2Br were detected in appreciable concentrations and total THMs (TTHMs) values were well below the WHO limits (80 μg/L). TTHMs variations ranged from 0 to 16 μg/L and 0 to 54 μg/L in GKWSS and KSWSS, respectively. Highest TTHM value (54 μg/L) was found in KSWSS which employs pulsation treatment technology. Correlations between CHCl3 and CHCl2Br in both water schemes are noteworthy, but THM levels relate to most of the water quality parameters ambiguously. However, a distinct relationship is observed between THM levels and degree of chlorination, resident time, pipeline corrosion, and temperature. THM formation increased towards the boundaries of most of the sub-water supply schemes (SWSS).

Sign in / Sign up

Export Citation Format

Share Document