Groundwater Quality

Bai, Hua; Yang, John Jeongseok; Deng, Baolin

doi:10.2175/106143009x12445568400575

Cited by 1 publication

(2 citation statements)

References 79 publications

(79 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Chinese drinking water standard has been amended to lower fluoride content in drinking water to less than 1.0 mg/L. Fluoride pollution in the environment can occur as a result of natural events and human activities (Fan et al, 2003;Gouider et al, 2011;Hua et al, 2009). Fluoride frequently exists in minerals, and it can be leached out as a result of erosion by rainwater, thereby allowing it to contaminate groundwater and surface water.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption technology is very important for the separation and purification of materials in many industrial processes. Particularly for energy technologies and keeping air and water clean, adsorption is becoming more and more important (Arellano-Cárdenas et al, 2005;Hua et al, 2009;Li et al, 2006;Zhang et al, 2007). Its degree of efficiency very strongly depends on the media used (Ayoub et al, 2001;Jovanovic et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Adsorption of Fluoride from Aqueous Solution Using an Iron‐Modified Attapulgite Adsorbent

Zhang

2013

Water Environment Research

View full text Add to dashboard Cite

Attapulgite modified with iron was used as an adsorbent for fluoride removal from aqueous solutions. The pristine attapulgite and the iron-modified attapulgite composite were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) techniques, and the pH point of zero charge measurement. The XRD analysis indicates the existence of iron oxide hydroxide (FeO[OH]) in the iron-modified attapulgite composite. The FT-IR spectra of the iron-modified attapulgite composite before and after adsorption indicate that the involvement of the hydroxide radical in the fluoride adsorption. The effects of pH, contact time, initial concentration, and temperature on fluoride adsorption by the adsorbent were studied in a batch system. Kinetics studies show that the fluoride adsorption kinetics over the adsorbent is well-described by the pseudo-second-order kinetic model. The fluoride adsorption isotherm is well-fitted by the Langmuir model. Desorption studies show that the iron-modified attapulgite adsorbent can be easily regenerated at pH 12.5. The adsorption mechanism is discussed in detail.

show abstract

Section: Introductionmentioning

confidence: 99%