期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 46, 期 3, 页码 460-472出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2010.512030
关键词
agricultural waste; low-cost adsorbents; physico-chemical treatments; surface modification; water pollution control
资金
- Hong Kong Polytechnic University
- Research Grants Council (RGC) of Hong Kong SAR (PR China) [PolyU 5224/05E, PolyU 5223/06E, MTKD-CT-2006-042637]
This laboratory study investigates the performances of coconut shell waste-based activated carbon (CSBAC) in removing 4-chlorophenol (4-CP) from contaminated water. To improve its removal for target compound, the surface of CSBAC was modified with TiO2, NaOH, and/or HNO3. Under optimized conditions at the same initial concentration of 25mg/L, the NaOH-treated CSBAC could remove 91% of 4-CP, compared to the HNO3-oxidized CSBAC (60%) or the TiO2-coated CSBAC (72%). Although the NaOH-treated CSBAC could remove 91% of 4-CP, the adsorption treatment using this adsorbent alone was unable to meet the effluent limit of lower than 1mg/L. Therefore, subsequent biological processes are required to complement the removal of 4-CP from wastewater.
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