Preparation of H-oleoyl-carboxymethyl-chitosan and the function as a coagulation agent for residual oil in aqueous system |
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Authors: | Gang-zheng SUN Xi-guang CHEN Yan-yan LI Bo ZHENG Zheng-hui GONG Jian-jun SUN Heng CHEN Jie LI Wen-xing LIN |
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Affiliation: | (1) College of Marine Life Science, Ocean University of China, Qingdao, 266003, China;(2) Materials and Equipments Supplying Department, GuDao Oil Plant, Shengli Oil Field of China, Dongying, 257231, China;(3) Technology, Quality and Safety Supervision Center, GuDao Oil Plant, Shengli Oil Field of China, Dongying, 257231, China |
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Abstract: | In this study, H-form oleoyl-carboxymethyl-chitosan (H-O-CMCS) was prepared as a coagulation agent to clean up the residual
oil from the waste-water of oil extraction (WWOE). The Fourier transform infrared (FTIR) spectra confirmed the formation of
an amide linkage between amino groups of carboxymethyl chitosan (CMCS) and carboxyl groups of oleic acid. The adsorption capacities
of four absorbents (H-O-CMCS, chitosan, activated carbon and polyaluminium chloride (PAC)) for the residual oil were investigated.
Compared with chitosan, activated carbon and PAC, H-O-CMCS was more effective in removing the residual oil from WWOE, which
could successfully wash up almost 99% of residual oil from WWOE at the dosage of 0.2 g/L, the mixing time of 3 min, 500 rpm,
and a broader range of pH (the system temperature ⩽ 45°C). In similar conditions, comparatively, chitosan, activated carbon
and PAC could wash 90%, 82% and 92% of residual oil from WWOE, respectively. |
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Keywords: | H-oleoyl-carboxymethyl-chitosan (H-O-CMCS) residual oil adsorption |
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