以小麦秸秆为原材料，在500℃制备生物质炭，研究其对水中罗丹明B的去除效果及其影响因素。结果表明，小麦秸秆生物质炭对水中罗丹明B的去除效果较好。Langmuir方程可以较好地描述小麦秸秆生物质炭对水中罗丹明B的吸附行为，其最大吸附量为0.022 mmol/g；pH=9，离子强度为0.1 mmol/L NaCl时，去除效果最佳；淋滤实验表明，累积吸附量为0.013 mmol/g。可见，小麦秸秆生物质炭可以用作高效吸附剂去除水中罗丹明B。%The wheat straw was turned into biochar under 500 ℃ in order to reveal the effects of wheat straw biochar on adsorption of Rhodamine-B from water. Result indicated that the biochar have high ad-sorption capacity for Rhodamine-B. Langmuir equation fitted the adsorption isotherms well and can be used to describe the adsorption behaviors of Rhodamine-B by the biochar. The adsorption capacity of Rho-damine-B predicted by langmuir equation was 0. 022 mmol/g. The optimal removal efficiency were derived when pH was 9 and ion strength was 0. 1 mmol/L NaCl. Leaching experiments showed the amount of Rho-damine-B absorpted by the biochar reached 0 . 013 mmol/g which indicated that biochar can be used as efficient adsorbents to remove the Rhodamine-B from the waste water.
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