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研究季铵盐阳离子表面活性剂四甲基铵离子 ( TMA)和十六烷基三甲基铵离子 ( HDTMA)改性的土壤 (黑土、黄棕壤、红壤 )对水中油的吸附作用 .结果表明 :改性土壤和未改性土壤均可吸附水中的油 ,但改性土壤对水中油的吸附能力明显高于未改性土壤 .改性土壤吸附油能力的顺序依次为 :1 CEC- HDTMA黑土 >1 CEC- HDTMA黄棕壤 >1 CEC- HDTMA红壤 >1 CEC-TMA黑土 >1 CEC- TMA黄棕壤 >1 CEC- TMA红壤 .未改性土壤和 HDTMA改性土壤对油的吸附通过分配来进行 ,吸附等温线可由 Henry方程表示 ,得出 log KSOM为 2 .69,log KHDTMA为 3.35;TMA改性土壤对油的吸附符合 Langmuir方程 ,其对油的饱和吸附量分别为 1 1 50 mg/kg( TMA黑土 ) ,751 mg/kg( TMA黄棕壤 ) ,1 72 mg/kg( TMA红壤 )
The effects of quaternary ammonium salt cationic surfactant tetramethylammonium ion (TMA) and cetyltrimethylammonium ion (HDTMA) modified soil (black soil, yellow brown soil, red soil) on the oil adsorption were studied. Results The results showed that both modified soil and unmodified soil could adsorb oil in water, but the adsorption capacity of modified soil to water oil was significantly higher than that of unmodified soil.According to the order of 1 CEC-HDTMA Black soil> 1 CEC-HDTMA yellow brown soil> 1 CEC-HDTMA red soil> 1 CEC-TMA black soil> 1 CEC-TMA yellow brown soil> 1 CEC- TMA red soil. Adsorption of oil by unmodified soil and HDTMA-modified soil The adsorption isotherms can be expressed by the Henry equation, resulting in a log KSOM of 2.69 and a log KHDTMA of 3.35. The adsorption of TMA-modified soil on the oil conforms to the Langmuir equation and its saturated adsorption capacity to oil is respectively 1 1 50 mg / kg (TMA black soil), 751 mg / kg (TMA yellow brown soil), 72 mg / kg (TMA red soil)