松树皮粉末对Cr(Ⅵ)的吸附效果研究

Study on the adsorption effect of pine bark powder on Cr(Ⅵ)

研究了松树皮粉末对水体中Cr(Ⅵ)的处理效果,探讨了不同松树皮粉末用量、pH值、处理时间等因素对Cr(Ⅵ)去除率的影响。结果表明:松树皮粉末对水中Cr(Ⅵ)的去除能力较强,经磷酸改性松树皮粉末后其处理能力加强,且符合Langmuir吸附等温式;经磷酸处理过的松树皮粉末在用量为1.0 g/100 mL,pH值为2.0,吸附时间为300 min的条件下,处理含铬废水的去除率可达95%。

The pine bark powder adsorption effect on Cr（VI） in aqueous solution is investigated in the paper. And based on the pine bark powder modified with the different methods, it discusses the effects of Cr（VI） removing rate on the amount of pine bark powder, pH value and treating time. The results show that pine bark powder has strong adsorption ability of Cr（ VI）, but the pine bark powder modified with the solution of phosphoric acid is stronger and it fits the Langmuir isotherm ： under the amount of the pine bark powder modified with the solution of phosphoric acid of I. 0g/100mL, pH is 2.0 and adsorption time is 300 minute, Cr（VI） removing rate can reach 95%.