Effective treatment of nutrients by adsorption onto the surface of a modified clay and a toxicity evaluation of the adsorbent

Soon-Jae Lee, Kyu Sang Kwon, Jae Chun Ryu, Mi Kyung Song, Stephan Pflugmacher, Chanhyuk Park, Sang-Hyup Lee, Chul Hwi Park, Jae Woo Choi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A pure clay ball and surface-modified clay ball were investigated to remove phosphate from synthetic wastewater; phosphate causes eutrophication in hydro-ecological systems. Adsorption tests of phosphate from aqueous solutions onto two types of adsorbents were conducted. The maximum phosphate adsorption capacities of the pure and surface-modified clay ball were found to be 0.084 and 8.869 mg/g, respectively. In a fixed-bed column packed with surface-modified clay balls, the first breakthrough of phosphate appeared after approximately 4000 min. In addition, the phosphate adsorbed on the surface-modified clay ball was effectively desorbed using a 1 M zirconium sulfate solution, and the adsorbent was regenerated for four adsorption and three desorption cycles by maintaining the adsorption capacity at the value before regeneration. X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX), and Brunauer-Emmett-Teller (BET) analysis method were performed to reveal the characteristics of the surface-modified clay ball. Cytotoxicity experiment was conducted on the developed adsorbents, and as a result, these showed low cytotoxic effect on the human cells. These results indicated that the surface-modified clay ball, due to the low cost, high adsorption capacity, and non-toxicity, has the potential to be utilized in the cost-effective removal of phosphate from aqueous solutions.

Original languageEnglish
Article number2376
JournalWater, Air, and Soil Pollution
Volume226
Issue number4
DOIs
Publication statusPublished - 2015 Apr 1

Fingerprint

Adsorbents
Nutrients
Toxicity
Clay
Phosphates
phosphate
toxicity
adsorption
Adsorption
clay
nutrient
aqueous solution
Eutrophication
Cytotoxicity
evaluation
Zirconium
cost
X-ray spectroscopy
Sulfates
eutrophication

Keywords

  • Adsorption
  • Clay
  • Phosphate
  • Surface modification
  • Toxicity

ASJC Scopus subject areas

  • Pollution
  • Environmental Chemistry
  • Environmental Engineering
  • Ecological Modelling
  • Water Science and Technology

Cite this

Effective treatment of nutrients by adsorption onto the surface of a modified clay and a toxicity evaluation of the adsorbent. / Lee, Soon-Jae; Kwon, Kyu Sang; Ryu, Jae Chun; Song, Mi Kyung; Pflugmacher, Stephan; Park, Chanhyuk; Lee, Sang-Hyup; Park, Chul Hwi; Choi, Jae Woo.

In: Water, Air, and Soil Pollution, Vol. 226, No. 4, 2376, 01.04.2015.

Research output: Contribution to journalArticle

Lee, Soon-Jae ; Kwon, Kyu Sang ; Ryu, Jae Chun ; Song, Mi Kyung ; Pflugmacher, Stephan ; Park, Chanhyuk ; Lee, Sang-Hyup ; Park, Chul Hwi ; Choi, Jae Woo. / Effective treatment of nutrients by adsorption onto the surface of a modified clay and a toxicity evaluation of the adsorbent. In: Water, Air, and Soil Pollution. 2015 ; Vol. 226, No. 4.
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