Cost and Efficiency of Arsenic Removal from Groundwater: A …
Arsenic removal from groundwater of the Chaco-Pampean Plain (Argentina) using natural geological materials as adsorbents. Journal of Environmental Science and Health, Part A, 46 (11), 1297-1310.
Cost and Efficiency of Arsenic Removal from Groundwater: …
To standardize the data on effectiveness, the following formula was used to calculate the arsenic removal efficiency of each technology, where n is the arsenic removal efficiency, C₀ is the influent arsenic concentration of the water sample, and Ce is the effluent arsenic concentration. n(%)= (C₀-Ce) ×100 C₀ To compare costs, all non-USD ...
Exaggerated arsenic removal efficiency and pH adaptability …
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 ...
Selective removal of arsenic in water: A critical review
Selective removal of arsenic (As) is the key challenge for any of As removal mechanisms as this not only increases the efficiency of removal of the main As species …
Biochar modification to enhance arsenic removal from …
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 …
Review on the removal of Arsenic in groundwater using …
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 ...
Self-assembled mesoporous γ-Al
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 …
A review on different arsenic removal techniques …
A review on different arsenic removal techniques used for decontamination of drinking water. Howlader Rahidul Hassan. Article: 2165964 | Received 10 Nov 2022, …
Removal of Arsenic from Groundwater by Ferric Chloride
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 ...
Technologies for Arsenic Removal from Water: …
Arsenic removal efficiency of different coagulants varies as a function of pH. Below pH 7.6, Al 2 (SO 4 ) 3, and FeCl 3 are equally effective in removing arsenic from water [ 41 ]. Between the two inorganic arsenic species, most researchers suggested …
Recent advances of magnetite nanomaterials to remove arsenic …
The decrease in arsenic removal efficiency indicates the exothermic nature of the adsorption process for temperatures above 35 °C. Maximum adsorption capacities observed for As(iii) and As(v) were 32.7 mg g −1 and 13.1 mg g −1, respectively. It was observed that the M-nOG could be regenerated even after being reused for five …
Arsenic removal performance and mechanism from …
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 …
Removal Arsenic(V) Efficiency and Characteristics Using
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 oxidation and its subsequent removal from water: …
The efficiency of arsenic oxidation by platinum anodes with a solution of SO 4 2-has been studied. The oxidation rate is high because SO 4 2-is resistant to oxidation and advanced electrochemical oxidation processes to oxidize arsenic-contaminated water, where dimensionally fixed electrodes such as platinum-coated titanium (Pt/Ti) are used …
A bio-inspired membrane for arsenic removal
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 …
Removal of arsenic as a potentially toxic element from …
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.
Cost and Efficiency of Arsenic Removal from Groundwater: …
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 …
Heating Changes Bio-Schwertmannite Microstructure and Arsenic…
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 ...
Arsenic Removal
Figure 2.2 indicates that the arsenic removal efficiency in the absence of chlorine increases steeply from 15% to 80% as the pH changes from 9 to 11 when the arsenic concentration of the contaminated water is 400 μg/L. Arsenic removal efficiency for the same feed varies almost linearly (from 30% to 95%) with pH in the range of 8–11 in the …
Efficient removal of arsenic from groundwater using iron …
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 …
TiO2-impregnated activated carbon for removal of arsenic …
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 …
Cost and Efficiency of Arsenic Removal from Groundwater: …
The fourteen (14) technologies tested in the field achieved removal efficiency levels ranging between 60% and ~99%, with ten (10) attaining above 90% removal efficiency. Of these, only five (5) reached established the WHO standard. Some of the technologies under-performed when their influent water contained excessive …
Removal of arsenic from contaminated soils by combining …
To obtain the best arsenic removal efficiency and reduce experiment costs, 360 min was chosen as the best washing time to carry out subsequent experiments. 3.2.3. pH. The removal of arsenic and iron was studied at different pH values (3.0–10.0) with the composite washing agent. The results showed that the removal of arsenic and iron from ...
Polyethyleneimine-modified iron-doped birnessite as a …
The arsenic removal efficiency by Fe-Bir/PEI reaches to 93% at pH 3, as the abundant H + ions promote the adsorption of arsenic anions by Fe-Bir/PEI. When the pH is greater than 9, the competitive effect of OH − ions leads to a decreased arsenic removal efficiency [30] .
Efficient Removal of Arsenic Using Zinc Oxide
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 ...
A systematic study of arsenic adsorption and …
Published: 22 September 2022. A systematic study of arsenic adsorption and removal from aqueous environments using novel graphene oxide functionalized UiO-66-NDC …
Self-enhanced and efficient removal of arsenic from waste …
A high arsenic removal efficiency of 99.90% was achieved, and the dissolution of magnetite slowed after 12 h. A reaction of 12 h was found to be sufficient for arsenic precipitation and scorodite formation. The FTIR gives the surface information for the precipitates obtained from the different reaction times, as shown in Fig. 1 d.
Efficient removal of arsenic from copper smelting wastewater …
Accordingly, the arsenic removal efficiency increases from 73.76% to 98.98% when the reaction temperature increases from 60 °C to 90 °C. Both TCLP and XRD results show that the well-crystallized and environmentally stable scorodite is obtained at higher temperatures (≥70 °C), and the crystallite and stability increase with the increase …
Optimization of Coagulation-Flocculation Process in Efficient Arsenic …
The present work aims to study the removal efficiency of As(V) from arsenic-polluted groundwater wells coming from Nazarabad in Iran through the coagulation-flocculation process with ferric chloride coagulant. The Nazarabad well as a source of highly arsenic-polluted groundwater with an initial As(V) concentration of 0.5 mg/L was chosen …
Nanostructured Adsorbents for Arsenic Compounds' Removal
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 ...