Removal of cadmium from contaminated Lentinula edodes by optimized complexation and coagulation

文献类型： 外文期刊

第一作者： Wang, Yi

作者： Wang, Yi;Wang, Chen;Cheng, Wei;Guo, Peng;Bian, Yinbing

作者机构：

关键词： Cadmium;heavy metal pollution;lentinan;Lentinula edodes

期刊名称：FOOD SCIENCE & NUTRITION （ 影响因子：2.863； 五年影响因子：3.141 ）

ISSN： 2048-7177

年卷期： 2017 年 5 卷 2 期

页码：

收录情况： SCI

摘要： Heavy metal pollution is a serious problem for Lentinula edodes; however, the treatment of contaminated L. edodes has seldom been studied. This study investigated the removal of cadmium (Cd) from contaminated L. edodes and its lentinan by complexation and coagulation. Some influencing factors, such as pH, medical dosage, and preoxidation were examined. Cd complexation from contaminated L. edodes was shown to be more efficient under acidic conditions (pH 5.0), with a clearance rate of 80.47% in 25 mmol/L EDTA and 78.45% in 25 mmol/L sodium citrate. The Cd content in the lentinan of the contaminated L. edodes was markedly lower than that in the powdered mushroom (2.77 mg/kg vs. 19.49 mg/kg) and was easier to remove. The maximum Cd clearance rate (96.3%) for lentinan was obtained using an optimized process that involved preoxidation with 0.5 mg/L KMnO4, complexing with 25 mmol/L EDTA and 25 mmol/L sodium citrate, and coagulation with 50 mg/L activated carbon (AC) at pH 10.0.

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