Natural zeolites as effective adsorbents in water and wastewater treatment

Wang, Shaobin; Peng, Yongbo

doi:10.1016/j.cej.2009.10.029

Cited by 1,934 publications

(961 citation statements)

References 121 publications

Supporting

Mentioning

898

Contrasting

Unclassified

Order By: Relevance

“…However, the application of activated carbons can be limited by a range of factors, including high cost, poor adsorption selectivity, poor mechanical strength, and expensive and difficult regeneration (Ferro-Garcia et al 1996;Anbia and Ghaffari 2009;Anbia and Lashgari 2009;Ahmad et al 2011;Shah et al 2011). In contrast, zeolites have a number of potential advantages as sorbents, such as good mechanical strength, good thermal stability, and high sorption selectivity (Wang and Peng 2010;Misaelides 2011). In addition, zeolites can be regenerated easily and reused for water purification (Ozaydin et al 2006;Damjanovic et al 2010).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

“…In addition, zeolites can be regenerated easily and reused for water purification (Ozaydin et al 2006;Damjanovic et al 2010). Zeolites as sorbents also have some valuable physicochemical properties, including cation exchange capacity, selectivity with molecular dimension and well-defined pore structures, high surface areas, and tailorable surface hydrophobicity (Cheng and Reinhard 2006a, b;Wang and Peng 2010).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

“…Zeolites are crystalline, microporous aluminosilicates composed of three-dimensional framework with tetrahedral SiO 4 and AlO 4 connected together by sharing oxygen atoms, with exchangeable cations (usually alkali and alkaline earth cations) and water molecules in their cages and channels (Breck 1974;Rehakova et al 2004;Wang and Peng 2010). The charge imbalance associated with AlO 4 tetrahedra results in a negatively charged framework, which is compensated by the exchangeable cations on the pore wall surface (Rehakova et al 2004;Karapınar 2009).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

See 2 more Smart Citations

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Yang

Cheng

2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Sorption of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), and 2,4,6-trichlorophenol (2,4,6-TCP) on a range of dealuminated zeolites were investigated to understand the mechanism of their sorption on microporous minerals, while the influence of common metal cations, solution pH, and humic acid was also studied. Sorption of chlorophenols was found to increase with the hydrophobicity of the sorbates and that of the microporous minerals, indicating the important role of hydrophobic interactions, while sorption was also stronger in the micropores of narrower sizes because of greater enhancement of the dispersion interactions. The presence of metal cations could enhance chlorophenol sorption due to the additional electrostatic attraction between metal cations exchanged into the mineral micropores and the chlorophenolates, and this effect was apparent on the mineral sorbent with a high density of surface cations (2.62 sites/nm 2 ) in its micropores. Under circum-neutral or acidic conditions, neutral chlorophenol molecules adsorbed into the hydrophobic micropores through displacing the Bloosely bound^water molecules, while their sorption was negligible under moderately alkaline conditions due to electrostatic repulsion between the negatively charged zeolite framework and anionic chlorophenolates. The influence of humic acid on sorption of chlorophenols on dealuminated Y zeolites suggests that its molecules did not block the micropores but created a secondary sorption sites by forming a Bcoating layer^on the external surface of the zeolites. These mechanistic insights could help better understand the interactions of ionizable chlorophenols and metal cations in mineral micropores and guide the selection and design of reusable microporous mineral sorbents for sorptive removal of chlorophenols from aqueous stream.

show abstract

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

See 1 more Smart Citation

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Yang

Cheng

2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Furthermore, zeolite reduced the concentrations of inorganic N (-36.5%) and P (-17.9%) in the system water. Zeolites are characterised by high cation-exchange capabilities, and are thus able to adsorb ammonium-N (Nguyen and Tanner, 1998;Wang and Peng, 2010;Borin et al, 2013;Markou et al, 2014). In addition, iron-and aluminiumbased crystalline and amorphous phases can become positively charged and, through a ligand exchange mechanism, their adsorption capabilities increase at neutral to acidic equilibrium pH values in comparison to alkaline conditions (Parfitt, 1979;Geelhoed et al, 1997).…”

Section: Substrate Typesmentioning

confidence: 99%

Hydroponic systems and water management in aquaponics: a review

et al. 2017

View full text Add to dashboard Cite

Aquaponics (AP), the integrated multi-trophic fish and plants production in quasi-closed recirculating system, is one of the newest sustainable food production systems. The hydroponic component of the AP directly influences water quality (in turn influencing fish growth and health), and water consumption (through evapotranspiration) of the entire system. In order to assess the role of the design and the management of the hydroponic component on the overall performance, and water consumption of the aquaponics, 122 papers published from 1979 to 2017 were reviewed. Although no unequivocal results were found, the nutrient film technique appears in several aspects less efficient than medium-based or floating raft hydroponics. The best system performance in terms of fish and plant growth, and the highest nutrient removal from water was achieved at water flow between 0.8 L min -1 and 8.0 L min -1 . Data on water consumption of aquaponics are scarce, and no correlation between the ratio of hydroponic unit surface/fish tank volume and the system water loss was found. However, daily water loss was positively correlated with the hydroponic surface/fish tank volume ratio if the same experimental conditions and/or systems were compared. The plant species grown in hydroponics influenced the daily water loss in aquaponics, whereas no effect was exerted by the water flow (reciprocating flood/drain cycle or constant flow) or type (medium-based, floating or nutrient film technique) of hydroponics.

show abstract

“…Charged cations balance alkali and alkaline earth metals, such as sodium, potassium, magnesium or calcium. Hydrogen cationic resins can remove all water cations, and anionic resins may also remove all water anions, such as silica (Mao et al 1994;Wang and Peng 2010). Miranzadeh and Rabbani (2010) in Iran (Kashan) evaluated the chemical qualities of input and output water of desalination devices.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of household water treatment systems used in Kerman for removal of cations and anions from drinking water

et al. 2017

View full text Add to dashboard Cite

Increased awareness in society of the consequences of contaminants in drinking water has created a demand for household water treatment systems, which provide higher quality water, to spread. The aim of this study was to evaluate the performance of household water treatment systems used in Kerman for the removal of cations and anions. Various brands of home water treatment devices commonly used in Kerman were selected, with one device chosen from each brand for study. In cases in which the devices were used extensively, samples were selected with filters that had been changed in proper time, based on the device's operational instructions. The samples were selected from homes in the center and four geographical directions of Kerman. Then, sampling was conducted in three stages of input and output water of each device. For each of the samples, parameters were measured, such as chloride, sulfate, bicarbonate, calcium, magnesium, hardness, sodium, nitrate and nitrite (mg/L), temperature (°C), and pH. The average removal efficiency of different parameters by 14 brands in Kerman, which include chloride ions, sulfate, bicarbonate, calcium, magnesium, sodium, nitrites, nitrates, and total hardness, was obtained at 68.48, 85, 67, 61.21, 78.97, 80.24, 32.59, 66.83, and 69.38%, respectively. The amount of sulfate, bicarbonate, chloride, calcium, magnesium, hardness, sodium, and nitrate in the output water of household water treatment systems was less than the input water of these devices, but nitrite concentration in the output of some devices was more than the input water and showed a significant difference (p [ 0.05).

show abstract

Natural zeolites as effective adsorbents in water and wastewater treatment

Cited by 1,934 publications

References 121 publications

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Hydroponic systems and water management in aquaponics: a review

Performance evaluation of household water treatment systems used in Kerman for removal of cations and anions from drinking water

Contact Info

Product

Resources

About