Reduction and Enrichment of Uranium after Biosorption on Inactivated Saccharomyces cerevisiae
Reduction and Enrichment of Uranium after Biosorption on Inactivated Saccharomyces cerevisiae
复制标题
灭活酿酒酵母生物吸附后还原和富集铀
DOI：
10.15244/pjoes/101607
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发表时间：
2020-01
影响因子：
1.8
通讯作者：
Zhou Lin
中科院分区：
文献类型：
--
作者：
Zhang Wei;Dong Faqin;Liu Mingxue;Song Huaiqing;Nie Xiaoqin;Huo Tingting;Zhao Yulian;Wang Pingping;Qin Yilin;Zhou Lin
微生物不仅具有很强的生物吸附能力，而且对放射性废物具有巨大的减容作用。采用批式实验研究了灭活酿酒酵母对铀的吸附特性，并结合灰化法研究了铀在灭活酿酒酵母上的减容富集情况。结果表明，灭活的S.酿酒酵母生物质能够吸附铀。该菌对铀的最大去除率为96.8%，最大吸附量为31.8mg/g。吸附U（VI）的最适pH为2.75，吸附符合Freundlich吸附等温式。热力学研究表明，灭活S.酿酒酵母是一个自发的吸热过程。在动力学研究中，U（VI）在灭活S。酿酒酵母在60 min内达到平衡，符合准二级动力学模型。100 mg/L的铀经6轮梯度下降吸附后，铀浓度降至0.05 mg/L以下，达到国家铀废水排放标准。灰化实验表明，灰化过程导致了大的体积和重量减少率，并在灰中富集铀。XRD结果表明，铀在灰中以磷酸铀和KPUO 6·3 H2O的形式存在。通过对生物吸附剂进行灰化处理，可以减少废物体积并富集金属。该方法可用于多个领域的核素和重金属处置处理。
Microorganisms not only have a strong biosorption capacity but also can achieve tremendous volume reduction effects for radionuclide wastes. Batch experiments were conducted to investigate the biosorption characteristics of uranium on inactivated Saccharomyces cerevisiae and the volume reduction and enrichment of uranium after biosorption were also studied in combination with the ashing method. The results revealed that inactivated S. cerevisiae biomass was able to adsorb uranium. The maximum removal efficiency and biosorption capacity for uranium were 96.8% and 31.8 mg/g, respectively. The optimum pH for U(VI) removal was 2.75 and U(VI) biosorption was well described by the Freundlich isotherm model. Thermodynamic investigations showed that biosorption of U(VI) on inactivated S. cerevisiae was a spontaneous and endothermic process. In the kinetic studies, U(VI) adsorption on inactivated S. cerevisiae reached an equilibrium in 60 min and followed a pseudo-secondorder kinetics model. The 100 mg/L of uranium was reduced to less than 0.05 mg/L after 6 rounds gradient descent adsorption, which was enough to meet the National uranium wastewater discharge standards. The ashing experiment demonstrated that ashing process resulted in a large volume and weight reduction ratio as well as enrichment for uranium in the ash. XRD results showed that the species of uranium that existed in the ash were uranium phosphate and KPUO6·3H2O. Waste volume reduction and metal enrichment can be obtained by ashing treatment of the biological absorbent. The method may be beneficial for nuclide and heavy metal disposal treatment in many fields.
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影响因子：
0.5
作者：
S. Dmitriev;Y. V. Karlin;M. A. Maryakhin;Y. G. Myasnikov;Yu. T. Slastennikov
通讯作者：
S. Dmitriev;Y. V. Karlin;M. A. Maryakhin;Y. G. Myasnikov;Yu. T. Slastennikov
影响因子：
1.9
作者：
B. Min;Yoon-ji Lee;G. Yun;Ki-Won Lee;J. Moon
通讯作者：
B. Min;Yoon-ji Lee;G. Yun;Ki-Won Lee;J. Moon
酿酒酵母对铀的生物吸附和培养条件下的表面相互作用
影响因子：
11.4
作者：
Liu, Mingxue;Dong, Faqin;Pang, Xiaofeng
通讯作者：
Pang, Xiaofeng
影响因子：
13.6
作者：
El-Kamash, AM;Zaki, AA;El Geleel, MA
通讯作者：
El Geleel, MA
影响因子：
1.6
作者：
Zheng-ji Yi;Jun Yao;Mijia Zhu;Huilun Chen;Fei Wang;Xing-yu Liu
通讯作者：
Zheng-ji Yi;Jun Yao;Mijia Zhu;Huilun Chen;Fei Wang;Xing-yu Liu