Selective cadmium removal from hard water using NaOH-treated cells of the cyanobacterium Tolypothrix tenuis

被引：16

作者：

Nagase, H ^{[1
]}

Inthorn, D ^{[1
]}

Isaji, Y ^{[1
]}

Oda, A ^{[1
]}

Hirata, K ^{[1
]}

Miyamoto, K ^{[1
]}

机构：

[1] OSAKA UNIV,FAC PHARMACEUT SCI,ENVIRONM BIOENGN LAB,SUITA,OSAKA 565,JAPAN

来源：

JOURNAL OF FERMENTATION AND BIOENGINEERING | 1997年 / 84卷 / 02期

关键词：

cyanobacteria; cadmium; calcium; magnesium; hard water; sodium hydroxide;

D O I：

10.1016/S0922-338X(97)82545-7

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Cadmium removal from water in the presence of Ca2+ or Mg2+ was investigated using the filamentous cyanobacterium Tolypothrix tenuis. Untreated cells of T. tenuis exhibited a low degree of selectivity with respect to the removal of Cd in the presence of Ca2+ or Mg2+. Pretreatment of cells with 0.1 M NaOH, however, greatly increased the level of their Cd adsorption. Langmuir parameters were calculated and the amounts of Cd adsorbed were compared for different concentrations of Ca2+. The results showed that NaOH pretreatment of cells increased their Cd adsorbing ability in the presence of Ca2+. Pretreatment with NaOH was also shown to be applicable to other cyanobacterial strains. It is thought that the biomass of filamentous cyanobacteria treated by NaOH could be utilized as a novel biosorbent for Cd removal, even from hard water containing a high concentration of Ca2+ and/or Mg2+.

引用

页码：151 / 154

页数：4

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