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Removal of Hexavalent Chromium from Synthetic Wastewater Using Alginate Immobilized Cyanobacteria: Experiment and Mathematical Modeling

机译:使用藻酸盐固定的蓝细菌去除合成废水中的六价铬:实验和数学模型

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摘要

The present study aims at removal of Cr(VI) using immobilized Limnococcus limneticus from synthetic wastewater. Four different methods were followed to immobilize test cyanobacterial strain onto calcium alginate bead and named as Cyanobacteria Immobilized Calcium alginate Bead (CICB). Based on the preparation method, they were termed as CICB1, CICB2, CICB3, and CICB4. Effect of input variables such as pH (5-11) and concentrations of sodium alginate (20-40 g/L), calcium chloride (14.7-44.1 g/L), and amount of algal dosage (0.957-2.871 g/L) on the efficacy of beads in removal of Cr(VI) were examined. Comparative study showed that CICB1 was least efficient and maximum removal was obtained with CICB2, in which maximum cyanobacterial biomass was used. The effect of initial concentration (IC) of Cr(VI) on removal was studied using both CICB3 and CICB4 individually. The removal gradually decreased with increase in IC of Cr(VI) for both the beads. Scanning Electron Microscopy, Energy Dispersive Spectroscopy, and Fourier Transform Infrared studies of CICB3 and CICB4 were done. To understand the molecular transport mechanism of Cr(VI) within the solution, mesoscale simulations using computational fluid dynamics were used for predicting the removal of hexavalent chromium.
机译:本研究旨在使用固定化的Limnococcus limneticus从合成废水中去除Cr(VI)。遵循四种不同的方法将测试蓝细菌菌株固定在藻酸钙珠上,并将其命名为蓝藻固定藻酸钙珠(CICB)。根据制备方法,它们分别称为CICB1,CICB2,CICB3和CICB4。输入变量的影响,例如pH(5-11)和藻酸钠浓度(20-40 g / L),氯化钙(14.7-44.1 g / L)和藻类剂量(0.957-2.871 g / L)研究了珠粒去除Cr(VI)的功效。比较研究表明,CICB1效率最低,而使用最大蓝藻生物量的CICB2去除效果最大。分别使用CICB3和CICB4研究了Cr(VI)的初始浓度(IC)对去除的影响。两种珠的去除率均随Cr(VI)的IC增加而逐渐降低。进行了CICB3和CICB4的扫描电子显微镜,能量色散光谱和傅里叶变换红外光谱研究。为了了解溶液中Cr(VI)的分子传输机理,使用了计算流体动力学的中尺度模拟来预测六价铬的去除。

著录项

  • 来源
    《Environmental Engineering Science》 |2020年第4期|283-294|共12页
  • 作者

  • 作者单位

    Natl Inst Technol Durgapur Dept Chem Engn Durgapur 713209 W Bengal India;

    Univ Leuven Fac Engn Technol KU Leuven Campus Grp T Leuven Leuven Belgium;

    Vilnius Gediminas Tech Univ Inst Environm Protect Dept Environm Protect & Water Engn Vilnius Lithuania;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    computational fluid dynamics; cyanobacteria; hexavalent chromium; immobilization; mathematical modeling;

    机译:计算流体动力学;蓝细菌六价铬固定数学建模;
  • 入库时间 2022-08-18 05:18:00

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