Deposition behavior of residual aluminum in drinking water distribution system: Effect of aluminum speciation

Zhang, Yue; Shi, Baoyou; Zhao, Yuanyuan; Yan, Mingquan; Lytle, Darren A.; Wang, Dongsheng

doi:10.1016/j.jes.2015.05.010

Cited by 37 publications

(12 citation statements)

References 31 publications

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“…When the voltage is turned off, the energy from the oscillating sensor decreases as a function of time. This energy loss during dissipation (Δ D ) depends on the stiffness of the deposited film (coagulants and flocculants for this study); for example, a viscoelastic film results in a greater energy loss and higher dissipation. ,, It is generally accepted that the ratio Δ D /Δ f is an indication of film stiffness; the deposited layer is then considered to be rigidly bound to the sensor if −Δ D /Δ f <10 –7 (empirical stiff-viscoelastic limit).…”

Section: Materials and Methodsmentioning

confidence: 99%

Understanding and Improving Microplastic Removal during Water Treatment: Impact of Coagulation and Flocculation

Lapointe

Farner

Hernandez

et al. 2020

Environ. Sci. Technol.

251

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The efficacy of plastic particle removal by municipal water treatment plants is currently uncertain, and the mechanisms involved in microplastic (MP) coagulation and flocculation have only been superficially investigated. The removal of pristine versus weathered plastic debris and the impact of plastic particle size on removal remain largely unexplored. In this study, coagulation, flocculation, and settling performances were investigated using pristine and weathered MPs (polyethylene (PE) and polystyrene (PS) microspheres, and polyester (PEST) fibers). Weathering processes that changed the surface chemistry and roughness of MPs impacted MP affinity for coagulants and flocculants. A quartz crystal microbalance with dissipation monitoring was used to identify the mechanisms involved during MP coagulation and flocculation. Measured deposition rates confirmed the relatively low affinity between plastic surfaces and aluminum-based coagulants compared to cationic polyacrylamide (PAM). In every case examined, coagulant efficiency increased when the plastic surface was weathered. Removals of 97 and 99% were measured for PEST and weathered PE, respectively. Larger pristine PE MPs were the most resistant to coagulation and flocculation, with 82% removal observed even under enhanced coagulation conditions. By understanding the interaction mechanisms, the removal of weathered MPs was optimized. Finally, this study explored the use of settled water turbidity as a possible indicator of MP removal.

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Section: Materials and Methodsmentioning

confidence: 99%

Understanding and Improving Microplastic Removal during Water Treatment: Impact of Coagulation and Flocculation

Lapointe

Farner

Hernandez

et al. 2020

Environ. Sci. Technol.

251

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“…When water is not taken with food, it reaches directly from the esophagus to the stomach, where it comes into contact with the digestive juice (pH is between 2-3.5 and, as mentioned earlier, Aluminum dissolves more quickly in acidic medium) (Rogers and Simon 1999, Rondeau et al 2000, Samir and Rashed 2018, Walton 2012. In such cases the free Al +3 in the water is more absorbed by the body (Gardner et al 2003, Klotz et al 2017, Mendecki et al 2020, Yang et al 2019, Zhang et al 2016, Willhite et al 2014.…”

Section: Aluminum In the Body And Alzheimer's Disease (Ad)mentioning

confidence: 92%

Aluminum in food and potential role on Alzheimer’s disease of aluminum

Alkaya

Demirci

Şevik

2022

Turkish Journal of Engineering

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Several studies have shown the relationship between the aluminum exposure and the Alzheimer's disease. The gastrointestinal absorption of Aluminum (Al) is low. Also, If the renal filtering system works as needed, generally urine can be enough to eliminate overdose (rational over concentrations) of Al. But Al can be found in kinds of foods and drinks such as processed foods (because of additives, packaging materials, utensils…), fresh vegetables and fruits (because of soil) and even in drinking water therefore, in some cases, the Al level may pose a health risk. Chronic high concentration to Al exposure preferably intakes by oral, intravascular ways with also not having a good condition of Glomerular Filtering System of Kidneys (GFR). Nowadays, although mankind is having more Al by oral ways than past and many studies have been conducted to determine whether there is a relationship between aluminum and Alzheimer's disease(AD) or not. Therefore, this review is intended to provide a short summary of the works done in the past and it may warn people about Al intake in the next decade, therefore human can change their life to be more natural less industrial.

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“…7 This in turn may influence lead release, but the complex environment of a drinking water distribution system-and the possibility of multiple competing mechanisms-make it difficult to predict aluminum's net effect. Aluminum might precipitate at the scale-water interface as a hydroxide or silicate mineral that slows lead diffusion to the bulk water, [8][9][10][11] but this is controversial. 12,13 It might also precipitate as a phosphate mineral, diminishing the activity of orthophosphate and preventing formation of hydroxypyromorphite (Pb5(PO4)3OH) and other low-solubility phases that control lead release.…”

Section: Introductionmentioning

confidence: 99%

Seasonal lead release to drinking water and the effect of aluminum

Trueman

Bleasdale-Pollowy

Locsin

et al. 2021

Preprint

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Monitoring lead in drinking water is important for public health, but seasonality in lead concentrations can bias monitoring programs if it is not understood and accounted for. Here, we describe an apparent seasonal pattern in lead release to orthophosphate-treated drinking water, identified through point-of-use sampling at sites in Halifax, Canada, with various sources of lead. Using a generalized additive model, we extracted the seasonally-varying components of time series representing a suite of water quality parameters and we identified aluminum as a correlate of lead. To investigate aluminum’s role in lead release, we modeled the effect of variscite (AlPO4 · 2H2O) precipitation on lead solubility, and we evaluated the effects of aluminum, temperature, and orthophosphate concentration on lead release from new lead coupons. At environmentally relevant aluminum and orthophosphate concentrations, variscite precipitation increased predicted lead solubility by decreasing available orthophosphate. Increasing the aluminum concentration from 20–500 µg L-1 increased lead release from coupons by 41% and modified the effect of orthophosphate, rendering it less effective. We attributed this to a decrease in the concentration of soluble (<0.45 µm) phosphorus with increasing aluminum and an accompanying increase in particulate lead and phosphorus (>0.45 µm).

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Deposition behavior of residual aluminum in drinking water distribution system: Effect of aluminum speciation

Cited by 37 publications

References 31 publications

Understanding and Improving Microplastic Removal during Water Treatment: Impact of Coagulation and Flocculation

Understanding and Improving Microplastic Removal during Water Treatment: Impact of Coagulation and Flocculation

Aluminum in food and potential role on Alzheimer’s disease of aluminum

Seasonal lead release to drinking water and the effect of aluminum

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