Assessment of scaling and corrosion potential of drinking water resources of Iranshahr

Taghavi, Mahmoud; Mohammadi, Mohammad Hasan; Radfard, Majid; Fakhri, Yadolah; Javan, Safoura

doi:10.1016/j.mex.2019.02.002

Cited by 10 publications

(3 citation statements)

References 3 publications

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“…In relation to the LSI, the Ryznar stability index broadens the range of parameters liable to affect corrosion and water hardness because it considers magnesium content, temperature and dry residue, which indirectly considers typical components of dissolved substances, i.e., chlorides and sulfides. The RSI has a more extended corrosivity range than the LSI: 4 < RSI < 5-strong precipitation of sediment, 5 < RSI < 6-medium precipitation of sediment, 6 < RSI < 7-weak precipitation of sediment or initial corrosion, 7 < RSI < 7.5corrosion, 7.5 < RSI < 9-strong corrosion, RSI > 9-very strong corrosion [56,57,[68][69][70][71]. Basing on the performed determinations of quality parameters of the water transported by the investigated cast-iron pipelines (Table 1), the Langelier saturation index was calculated, which amounted to 0.07, which indicates very low precipitatibility, whereas the Ryznar index amounted to 7.17, which indicates very low corrosive features of the water flowing through the investigated pipelines.…”

Section: Discussionmentioning

confidence: 99%

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Hydraulic and Technological Investigations of a Phenomenon Responsible for Increase of Major Head Losses in Exploited Cast-Iron Water Supply Pipes

Wichowski

Kalenik

Lal

et al. 2021

Water

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The paper presents results of investigations of influence of major head losses on exploitation properties of water supply pipes after 30-year exploitation. The tested materials were cast-iron pipes with the internal diameter of 150 mm. A flowability drop coefficient ηt with average value of 0.45 was determined. Using the measured values of pressure difference Δp determined the absolute roughness of internal walls of the pipes after 30-year exploitation, which was referred to the new pipelines. The absolute roughness for the exploited pipes was equal to k = 27.6 mm, whereas for the new ones it was significantly lower and equal to k = 0.9 mm. Additionally, an analysis of the chemical and mineral composition of sediments gathered in the investigated pipelines was also performed. The top layer of the sediments was dominated by the compounds of a character of the iron hydroxide: goethite (α-FeOOH) and lepidocrocite (γ-FeOOH), whereas the internal layer was supplemented by the gypsum and sulfur, which was proven by the investigations performed with the use of scanning electron microscope (SEM). The sediment gathered within the pipes is the main reason of ca. 30-fold increase of the absolute roughness, which resulted in the flowability drop of the exploited water supply pipes.

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Section: Discussionmentioning

confidence: 99%

“…A number of methods exist for determination of aggressive and corrosive features of water [50][51][52][53]. In aim to determine the corrosive features of water flowing in the investigated pipes, the Langelier Saturation Index (LSI) and the Ryznar Stability Index (RSI) [54][55][56][57] were calculated.…”

Section: Figurementioning

confidence: 99%

Hydraulic and Technological Investigations of a Phenomenon Responsible for Increase of Major Head Losses in Exploited Cast-Iron Water Supply Pipes

Wichowski

Kalenik

Lal

et al. 2021

Water

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“…At coagulant dose of 2 mg/L, the LSI values are À0.27, À0.17, À0.21 for coagulant Alum, IPC-M, and UH respectively. The negative LSI value demonstrates negligible scaling impact of treated water on RO membrane (Taghavi et al 2019). The RSI values were calculated for the same and plotted in Figure 5.…”

Section: Mathematical Model To Predict the Scaling Tendency Of Coagulants Treated Watermentioning

confidence: 99%

Development of an integrating coagulation and reverse osmosis system to treat highly turbid water using synthesized coagulants

Solanki

Agarwal

Gupta

2022

Water Science and Technology

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In the present study coagulation process was used as pretreatment for the RO membrane with turbid raw water collected from Bisalpur Dam, Rajasthan, India. To optimize coagulation performance, three kinds of coagulants, namely, Alum (commercially available), synthesized inorganic polymeric coagulant-medium basicity (IPC-M), and inorganic polymeric coagulant-ultra high basicity (IPC-UH) were examined for turbidity removal with varying operating parameters. It was observed that in the optimum pH range of 6–7, the IPC-UH resulted as the best performing coagulant with 0.99 mg/L equivalent Al2O3 dose revealing 2 NTU residual turbidity and residual aluminium of 0.001 mg/L. Moreover, Langelier saturation index and Ryznar stability index values were evaluated at optimum conditions of all the three coagulants proclaiming negligible scaling potential. Furthermore, the coagulant-treated water (100 L) was fed to the RO membrane, and the performance was noted in terms of flux, pressure, and TDS. It was observed that IPC-UH has the lowest reduction in permeate flux of 0.78 L/min/m2 compared to commercially available coagulant alum (0.90 L/min/m2). Also, the increased feed pressure was observed for all the coagulants treated water with the lowest value of 2.3 kg/cm2 for IPC-UH, which was 2.5 kg/cm2 for Alum (commercially available coagulant). Henceforth, integration of coagulation before the RO system resulted in effective pretreatment of turbid water with very minute scaling.

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Hydrogeochemical and environmental isotope study of Topusko thermal waters, Croatia

Pavić,

Briški,

Pola

et al. 2024

Environ Geochem Health

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Thermal waters in Topusko (Croatia), with temperatures of up to 65 °C, have been used for heating, health, and recreational tourism for the past fifty years. Hydrogeochemical monitoring can provide insights into deeper geological processes and indicate system changes from baseline levels. It helps to identify potential anthropogenic impacts, as well as natural changes. Hydrogeochemical, geothermometrical, and environmental isotope studies of thermal waters in Topusko were conducted to improve the existing conceptual model of the Topusko hydrothermal system (THS), providing a baseline for continuous monitoring of the thermal resource. 2-year thermal springs and precipitation monitoring took place from March 2021 until March 2023. Major anions and cations, stable and radioactive isotopes (i.e. 18O, 2H, SO42−, 3H and 14C) and geothermometers were used to assess the origin of thermal waters in Topusko and their interaction with thermal aquifer. The results indicate the meteoric origin of thermal water, which was recharged in colder climatic conditions around the late Pleistocene–Early Holocene. Thermal water was last in contact with the atmosphere before approximately 9.5 kyr. Ca-HCO3 hydrochemical facies suggests carbonate dissolution as the dominant process driving the solute content. Geothermometrical results indicate an equilibrium temperature in the reservoir of 90 °C.

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Assessment of scaling and corrosion potential of drinking water resources of Iranshahr

Abstract: Graphical abstract

Cited by 10 publications

References 3 publications

Hydraulic and Technological Investigations of a Phenomenon Responsible for Increase of Major Head Losses in Exploited Cast-Iron Water Supply Pipes

Hydraulic and Technological Investigations of a Phenomenon Responsible for Increase of Major Head Losses in Exploited Cast-Iron Water Supply Pipes

Development of an integrating coagulation and reverse osmosis system to treat highly turbid water using synthesized coagulants

Hydrogeochemical and environmental isotope study of Topusko thermal waters, Croatia

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