Survey on full-scale drinking water treatment plants for arsenic removal in Italy

Sorlini, Sabrina; Gialdini, Francesca; Collivignarelli, Maria Cristina

doi:10.2166/wpt.2014.005

Cited by 24 publications

(18 citation statements)

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“…Concentrations of 10 mg/L for iron are considered relevant for drinking water treatment, especially for waters containing arsenic concentrations equal or higher than 100 µg/L. For example, in Guatemala, coagulation-filtration is used to treat around 4500 m 3 /day of groundwater of average As concentrations of 150 µg/L, with 12 mg/L of FeCl 3 . In Chilean plants, even higher doses of FeCl 3 (up to 56 mg/L) have been used in full-scale plants [4].…”

Section: As(iii) Removal By Use Of Pre-polymerized Coagulants Of Ironmentioning

confidence: 99%

“…As(V) is then efficiently adsorbed on the ferric hydroxides (Fe(OH) 3 ), formed during the hydrolysis of PFS. Moreover, to increased efficiency for As(III) removal might be contribute the gradual in situ oxidation of Fe(II), which results in short-chain oligomeric/polymeric species of Fe(OH) y z+ that favor in turn the surface complexes formation of As(III), as well of As(V).…”

Section: As(iii) Removal By Use Of Pre-polymerized Coagulants Of Ironmentioning

confidence: 99%

“…Therefore, alkalinity in general is a critical component in achieving efficient coagulation, and most arsenic-containing groundwaters have values within the range 4-8 mM of HCO 3 − . In addition, since PFS is a pre-polymerized coagulation reagent, it does not consume much alkalinity.…”

Section: Effect Of Carbonate Concentration On As(iii) Removal By the mentioning

confidence: 99%

“…Particularly, in Southeast Asia, more than 500 million people are exposed to arsenic concentrations over the WHO recommended concentration of 10 µg/L, and this was identified as a major cause of skin lesions and cancer. In Europe, significantly extended geogenic pollution of groundwaters with arsenic occurs in several countries, including Greece, Italy, Romania, Hungary, and Croatia [1][2][3]. The European Directive 98/83/EC lowered the limit of arsenic in drinking water from 50 to 10 µg/L, and since then, several treatment plants have been installed to tackle the arsenic pollution problem and to serve the affected population with safe drinking water [4].…”

Section: Introductionmentioning

confidence: 99%

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Use of Novel Composite Coagulants for Arsenic Removal from Waters—Experimental Insight for the Application of Polyferric Sulfate (PFS)

et al. 2017

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Abstract:In the present study, several pre-polymerized coagulants of iron and aluminum were tested for their efficiency towards As(V) and As(III) removal from water sources. The results showed that the pre-polymerized coagulants of iron, such as poly-ferric sulfate and poly-ferric silicate chloride, were very efficient for As(V) removal. With regard to As(III) removal, among all examined coagulants, including the conventional ferric chloride, only the poly-ferric sulfate (PFS) was able to reduce As(III) to concentrations below the drinking water regulation limit of 10 µg/L. In contrast, all tested composite coagulants based on aluminum were not capable of removing efficiently both species of arsenic. PFS addition in water containing 4 mM of alkalinity and 25 µg/L of As(V) and As(III) (i.e., total arsenic concentration 50 µg/L) resulted in finished water with less than 5 µg/L arsenic, only by dosing 5 mg Fe-PFS/L at pH 7, whereas, simultaneously, the residual iron concentration was found well below its drinking water regulation limit of 200 µg/L. The use of PFS could provide a viable alternative for As(III) and As(V) removal at household treatment level for application in vulnerable communities, without the need of any additional treatment, such as oxidation of As(III) to As(V).

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Section: As(iii) Removal By Use Of Pre-polymerized Coagulants Of Ironmentioning

confidence: 99%

Section: As(iii) Removal By Use Of Pre-polymerized Coagulants Of Ironmentioning

confidence: 99%

Section: Effect Of Carbonate Concentration On As(iii) Removal By the mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Use of Novel Composite Coagulants for Arsenic Removal from Waters—Experimental Insight for the Application of Polyferric Sulfate (PFS)

et al. 2017

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“…DWTP monitoring to highlight critical issues, with the addition of laboratory and/or field tests (so-called experimental performing tests), should be adopted as a routine procedure for the "good management" of a DWSS. The scientific literature (Vieira et al, 2008;Lamrini et al, 2014) reports interesting studies on the optimization of different DWTPs with "targeted upgrading" (Sorlini et al, 2015b) and operative cost saving (Sorlini et al, 2015c) for DWSSs that must respect more stringent limits for specific pollutants, i.e., arsenic (Sorlini et al, 2014;Collivignarelli et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Water Safety Plan for drinking water risk management: the case study of Mortara (Pavia, Italy)

Sorlini¹,

Biasibetti²,

Abbà³

et al. 2017

Rev. ambiente água

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The Water Safety Plan (WSP) approach is an iterative method focused on analyzing the risks of water contamination in a drinking water supply system, from catchment to consumer, in order to protect human health. This approach is aimed at identifying and drastically reducing water contamination in the entire drinking water system, through the identification and mitigation or, if possible, elimination of all factors that may cause a chemical, physical, microbiological and radiological risk for water. This study developed a proposal of WSP for the drinking water supply system (DWSS) of Mortara, Italy, in order to understand which are the preliminary evaluation aspects to be considered in the elaboration of a WSP. The DWSS of Mortara (a town of 15,500 inhabitants, located in northern Italy) consists of three drinking water treatment plants (DWTPs), considering the following main contaminants: arsenic, iron, manganese and ammonia. Potential hazardous events and associated hazards were identified in each part of the water supply system. The risk assessment was carried out following the semi-quantitative approach. The WSP proposal for Mortara was very useful not only as a risk mitigation approach, but also as a cost-effective tool for water suppliers. Furthermore, this approach will reduce public health risk, ensure a better compliance of water quality parameters with regulatory requirements, increase confidence of consumers and municipal authorities, and improve resource management due to intervention planning. Further, some new control measures are proposed by the WSP team within this work.Keywords: arsenic, drinking water, risk assessment, risk management, water safety plan. desde a captação ao consumidor, visando à proteçãoda saúde humana. Objetiva-se identificar e reduzir drasticamente a contaminação da água em todo o sistema de água potável pela identificação e mitigação ou, se possível, a eliminação de todos os fatores que podem causar um risco químico, físico, microbiológico e radiológico para a água. Este estudo desenvolveu uma proposta de PSA para o sistema de abastecimento de água potável de Mortara (Itália), a fim de compreender quais são os aspectos de avaliação preliminar a serem considerados na elaboração de um PSA. O sistema de abastecimento de água potável de Mortara (uma cidade de 15.500 habitantes, localizada no norte da Itália) consiste em três estações de tratamento de água, considerando os seguintes contaminantes principais: arsênio, ferro, manganês e amônia. Eventos perigosos potenciais e riscos relacionados foram identificados em cada parte do sistema de abastecimento de água. A avaliação do risco foi realizada seguindo a abordagem semi-quantitativa. A proposta do PSA para o sistema de abastecimento de água potável de Mortara contribuirá para reduzir os riscos à saúde pública, assegurar um melhor cumprimento dos parâmetros de qualidade da água, dos requisitos regulamentares, do aumento da confiança dos consumidores e autoridades municipais, assim como melhorar a gestão de recursos devido ...

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Enhancing Performance of Arsenic Adsorption through Ce‐Modified Activated Carbon Derived from Bamboo Shoot Shells

Zhao,

Jiao,

Wang

et al. 2024

ChemistrySelect

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Arsenic is a major pollutant in aquatic environments. Due to its high toxicity and poor biodegradability, arsenic has emerged as a significant challenge in the realm of water pollution management. In this study, bamboo shoot shells activated carbon modified with cerium nitrate hexahydrate (Ce‐BAC) is prepared, and its adsorption properties for As (V) and As (III) are investigated. The results indicate that the adsorption capacity of bamboo shoot shells activated carbon (BAC) for As (V) and As (III) is measured to be 3.718 mg/g and 3.527 mg/g, respectively, under the conditions of an activation temperature of 900 °C, activation time of 75 minutes, and pH=7. After modifying it with cerium nitrate hexahydrate, the greatest adsorption capacity of Ce‐BAC for As (V) increases to 16.5 mg/g, and for As (III) to 21.47 mg/g. Moreover, the adsorption process of As (V) and As (III) by BAC and Ce‐BAC in this study exhibits conformity to pseudo‐second order kinetics. These findings indicate that the adsorption performance of As (V) and As (III) by Ce‐BAC has been greatly improved. Therefore, Ce‐BAC exhibits a vast potential in adsorbing both As (V) and As (III), showcasing promising prospects.

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Survey on full-scale drinking water treatment plants for arsenic removal in Italy

Cited by 24 publications

References 0 publications

Use of Novel Composite Coagulants for Arsenic Removal from Waters—Experimental Insight for the Application of Polyferric Sulfate (PFS)

Use of Novel Composite Coagulants for Arsenic Removal from Waters—Experimental Insight for the Application of Polyferric Sulfate (PFS)

Water Safety Plan for drinking water risk management: the case study of Mortara (Pavia, Italy)

Enhancing Performance of Arsenic Adsorption through Ce‐Modified Activated Carbon Derived from Bamboo Shoot Shells

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