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以鱿鱼墨黑色素为吸附剂,分别研究鱿鱼墨黑色素添加量、吸附时间、吸附温度和溶液pH对Pb2+、Cr6+清除率的影响,并测定静态吸附等温线方程。结果表明:在水溶液中添加鱿鱼墨黑色素能有效吸附Pb2+和Cr6+,吸附15 min时,鱿鱼墨黑色素对Pb2+和Cr6+的清除率均大于85.00%。鱿鱼墨黑色素对Pb2+清除率随温度的升高而降低,但是对Cr6+的吸附作用在35℃最强。当溶液pH 5.0时,Pb2+的清除率低,溶液pH 4.0～6.0时,鱿鱼墨黑色素能有效地吸附Cr6+。鱿鱼墨黑色素对Cr6+吸附作用符合Langmuir和Freundlich等温线方程,而对Pb2+的吸附仅与Langmuir等温线方程相关性高。
Using squid ink melanin as adsorbent, the effects of squid ink melanin addition, adsorption time, adsorption temperature and solution pH on the removal rate of Pb2 + and Cr6 + were studied respectively. The static adsorption isotherm equations were also determined. The results showed that the removal rate of Pb2 + and Cr6 + by squid ink melanin was more than 85.00% when squid ink melanin was added into aqueous solution to effectively adsorb Pb2 + and Cr6 +. The removal rate of Pb2 + by squid ink melanin decreased with the increase of temperature, but the adsorption of Cr6 + was the strongest at 35 ℃. When the solution pH 5.0, Pb2 + removal rate is low, the solution pH 4.0 ~ 6.0, squid ink melanin can effectively adsorb Cr6 +. The adsorption of Cr6 + by squid ink melanin conforms to the Langmuir and Freundlich isotherm equations, while the adsorption of Pb2 + has only a high correlation with the Langmuir isotherm equation.