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Kinetic and Thermodynamic Studies on Removal of Cu(II) from Aqueous Solutions using Soil Nanoclays
Author(s) -
Chen YuehMin,
Tsao TsungMing,
Wang MingKuang,
Yu Shen,
Liu ChengChung,
Li HongChun,
Chiu ChihYu,
Wang LiaugChi
Publication year - 2015
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143014x14062131179159
Subject(s) - adsorption , aqueous solution , chemistry , soil water , kinetic energy , chemical engineering , clay soil , clay minerals , environmental chemistry , nuclear chemistry , mineralogy , soil science , environmental science , organic chemistry , physics , quantum mechanics , engineering
Soil clays (< 2,000 nm) (SC) and soil nanoclays (< 100 nm) (SNC) were used as adsorbents for removal of Cu(II) from aqueous solution. The experiments were conducted with variables including pH, interaction time, concentration of Cu(II) and temperature. Four kinetic models have been employed to investigate adsorption mechanisms, and the experimental data more closely resemble a second‐order process of the kinetic model. Adsorption studies on soil nanoclays have been shown to be highly effective in removing of Cu(II) from aqueous solution. This adsorbent is widely available as a natural material, is mechanically stable and, most importantly, it is environmentally appealing. The maximum Cu(II) adsorption capacity of soil nanoclays (31.7 mg/g) is more than three times higher than natural soil clays (10.2 mg/g). Our study demonstrates that soil nanoclays can be used effectively for removal of Cu(II) from aqueous systems to achieve environmental cleaning purposes.