摘要
报道了高等真菌毛木耳Auricularia polytricha生物吸附Cu2+的试验研究,以摸清毛木耳菌丝体吸附Cu2+的理想条件。试验评价了影响吸附的溶液pH值,温度,振荡吸附时间,初始金属质量浓度和菌丝体生物质量分数。结果表明:pH值影响毛木耳的吸附能力随溶液中初始Cu2+质量浓度的不同而不同,在低Cu2+质量浓度(10mg·L-1),pH=6时,每克干质量的菌丝体对Cu2+的吸附值达到最大(1.4608mg);温度的影响没有规律,在20℃时吸附能力最强;吸收15min时,毛木耳每克干质量的菌丝体对Cu2+的吸附值为最高(1.379mg);随着溶液初始Cu2+质量浓度的增加,吸附率增加,但随菌丝体生物质量分数的增加吸附能力下降,当溶液Cu2+的质量浓度为60mg·L-1,下降最明显。毛木耳作为重金属的生物吸附剂有待进一步的深入研究。
The use of macrofungi Auricularia polytricha in Ca^2＋ removal as biosorbent was investigated. The purpose of this study was to obtain the optimal conditions for Cu^2＋ biosorption of.4. polytricha. The sorption experiments were conducted to evaluate the effects of initial pH and temperature, shaking time, initial metal ion and biomass concentration. Initial pH affected Cu^2＋ sorption capacity was various with initial Cu^2＋ concentrations and the highest sorption capacity was Cu^2＋ 1.460 8 mg/g dry mycelium when pH was 6 and Cu^2＋ was 10 mg·L^-1 in solution. The influence of temperature was irregular. The sorption capacity was highest at 20 ℃. When shaking time up to 15 minutes, Cu^2＋ adsorptive capacity of,A. polytricha showed a highest value （Cu^2＋ 1.379 mg/g dry mycelium ）. Cu^2＋ sorption capacity increased with initial Cu^2＋ concentrations. As biomass concentration increases, Cu^2＋ uptake rate decreased, that was much more pronounced when the initial Cu^2＋ concentration was 60 mg·L^-1. Macrofungi .4. polytricha could be as a biosorbent for Cu^2＋ removal in effluents, but further study should be necessary.
出处
《生态环境》
CSCD
北大核心
2006年第2期295-298,共4页
Ecology and Environmnet
基金
四川省2004年科技攻关项目(04SG023-006-05)
