Among many techniques currently available for arsenic removal from water, the adsorption process is considered one of the most promising techniques because of low cost, high efficiency, and ease of operation. 43 Iron-based adsorbents have been extensively developed and showed good removal efficiency for arsenic species from …

Arsenic removal from water by electrocoagulation can use iron, aluminium, or titanium; each metal promotes different efficiency (Kumar et al., 2004). Aluminum …

To explore the arsenic adsorption removal by PLMH in the ideal state, sodium arsenic dibasic heptahydrate and ultr apure water were employed to prepare certain concentrations of As(V) solutions ...

In this study, the removal of arsenic using two membrane processes-nanofiltration (NF) and reverse osmosis (RO) has been specially investigated in light of the outstanding removal efficiency of ...

The removal efficiencies of As (V) and As (III) were significantly affected by the solution pH and presence of PO 43– and citrate. The reusability experiments showed …

Intensive research efforts have been pursued to remove arsenic (As) contamination from water with an intention to provide potable water to millions of people …

A R-MFC composite containing 41 wt% of ZnO nanocrystals was found to be very efficient to remove arsenic (As(V)) ions from water with the maximum capacity of 4,421 mg/g at neutral pH (= 7), based ...

Arsenic is among the most dangerous contaminants which can limit groundwater use for drinking water consumption. Among the most diffused As-removal technologies around the world, adsorptive media systems are usually favored for relatively low cost and simplicity of operation. This study examines the performance of a laboratory …

Published: 22 September 2022. A systematic study of arsenic adsorption and removal from aqueous environments using novel graphene oxide functionalized UiO-66-NDC …

1. Introduction. Arsenic (As) contamination in groundwater has been an environmental issue for many decades (Nordstrom, 2002).Excessive and prolonged exposure to As can cause serious health problems such as skin lesions and cancers (Brown and Ross, 2002).Even now, millions of people face the threat of As, particularly in …

The paper analyzed the usage and efficiency of different types (zero-valent iron, oxides, hydroxides, oxyhydroxides, composites, etc.) of nanostructured adsorbents for arsenic compounds' removal. Increasing of arsenic content in natural waters due to changes of groundwater level and mining activities is the significant problem of drinking ...

For arsenic removal efficiency of the filtration device, USEPA advocates use of any input arsenic concentration of your choice based on local ground water contaminations level and reduce it to less than 10 ppb and claim the same conditions in the product (e.g. this product meets US EPA standard for arsenic with an input of say 200 …

Arsenic (As) contamination is a major threat to drinking water quality throughout the world, and the development of appropriate remediation methods is critical. Adsorption is considered the most effective method for remediation of As-contaminated water. Biochar is a promising adsorbent and widely discussed for As removal due to its …

A key innovation by Galiano et al. is to use a microporous membrane with a pore size of 0.14 μm to selectively pick up soluble arsenic species for their removal 5. It …

Integrating nanoparticles with hydrochar can significantly enhance arsenic removal efficiency, making the composite material a promising candidate for practical applications in wastewater treatment. The findings observed by H. Chen et al. (2021a) are of utmost importance in propelling the development of cost-effective and environmentally ...

Arsenic occurrence and toxicity records in various industrial effluents have prompted researchers to find cost-effective, quick, and efficient methods for removing arsenic from the environment.

Arsenic removal efficiency and operating cost from drinking water at the optimum conditions (current density of 2.5 A/m 2, arsenic concentration of 150 μ g/L, operating times of 12.5 min for Al electrode and 15 min for Fe electrode, initial pH of 6.5 for Fe and 7 for Al electrodes) were determined as 93.5% and 0.023 $/m 3 for Fe electrode …

This book chapter presents a systematic description of current status of research in the area of arsenic removal from contaminated water and comparison of all technologies available with more emphasis on adsorption. ... X. Hu, et al., Characterization and adsorption performance of Zr-doped akaganéite for efficient arsenic removal J. …

This review aims to compare the effectiveness and costs of various arsenic remediation technologies while considering their practical applicability. A search conducted using the Medline and Embase databases yielded 31 relevant articles published from 1996 to 2018, which were categorized into laboratory and field studies. Data on the effectiveness of …

Introduction. Soils are frequently contaminated with arsenic (As) due to geological processes and human activities (Sharma et al., 2022).Elevated levels of As in soils are detrimental to plant growth and pose significant health risks to humans through the food chain (Li et al., 2011).Consequently, As pollution in soils has gained considerable …

However, the typical reported concentration of SiO 3 2− in groundwater is 0.3 mM (Das et al., 2020), so we expect some reduction in arsenic removal efficiency when CNCs–PDA–nZVI is used. In particular, PO 4 3− has a similar adsorption mechanism to arsenic due to its considerable chemical similarity (P.L. Smedley and Kinniburgh, 2002 ).

Arsenic removal efficiency of MA-1C material as a function of pH. 4. Conclusions. From the above experimental results we can conclude that self-assembled mesoporous γ-Al 2 O 3 spherical nanoparticles can be synthesized hydrothermally by using the supramolecular-assembly of sodium salicylate as a template. Salicylate anions …

The arsenic(III) removal efficiency from an initial 1 mg/L arsenic(III) solution (pH 7.5) was 25.1% when 0.25 g/L of 105 °C dried-sch was used as adsorbent. However, this efficiency increased to ...

For As(V) concentration up to 10 mg/L in the solution shows 98.85% rejection efficiency at low pH but efficiency decreases as arsenic concentration …

The removal efficiency of the reverse osmosis membrane did not change significantly as arsenic concentration increased (between 50 and 400 μg/L), but the removal efficiency of the nanofiltration membrane decreased by 10% and by 30% when Na 2 SO 4 (0.1 Mm) salt was present.

The effect of pH in removal efficiency of arsenic is related to solubility of amorphous hydroxides solid of ferric ions such that the flocs formed in neutral pH are more stable. [19] The results ...

Effects of adsorption time on removal efficiency. The effects of adsorption time on TiO 2-impregnated mineral activated carbon's arsenic removal efficiency in the water polluted by DA were firstly studied.As shown in Fig. 2, the removal efficiencies of total arsenic increased with the extension of adsorption time, suggesting that the TiO 2 …

The removal efficiency of the adsorbent improves with an increase in the dosage of adsorbent as the number of free sites for metal cations increases [42, 43]. Ion exchange, surface protonation, electrostatic attraction and chemical interaction can be used to explain how a pH shift affects the efficiency of arsenic adsorption by treated laterite ...

Bath experiments were carried out to explore the arsenic removal efficiency and reaction mechanism, using 5 g of steel-making slag and 100 mL of copper smelting wastewater, at different permanganate dosages (0, 1, 1.5, 2, and 2.5 mmol) and reaction times (30, 45, 60, 90, 120, 150, and 180 min). Under optimum conditions, a deep …

Maximization of the coagulation process efficiency, thus, arsenic removal by optimization of the other operating conditions, such as chemical concentrations, operational pH, and initial arsenic concentration, therefore, is very important. For this aim, the Box–Behnken experimental design method was used to find optimum removal …