Shukla S P, Gupta G S
Algal Research Laboratory, Banaras Hindu University, Varanasi, India.
Ecotoxicol Environ Saf. 1992 Oct;24(2):155-63. doi: 10.1016/0147-6513(92)90043-3.
Toxic effects of Omega Chrome Red ME, a popular textile dye, on the nitrogen fixing cyanobacterium Nostoc calcicola were studied. The growth of N. calcicola was found to be suppressed at 10 and 20 mg liter-1 initial concentrations of dye, whereas a low initial concentration of 5 mg liter-1 slightly favors growth. Removal of the dye was carried out by adsorption using some cheap and unconventional adsorbents like coal, fly ash, wollastonite, and china clay. It has been observed that, in all cases, the low adsorbate concentration, the low temperature, and an acidic medium favor the dye removal process. The process of uptake follows first-order adsorption rate expression and obeys Langmuir's model of adsorption. The removal process is also partially diffusion controlled. Thermodynamic and pH studies were run to explain the results.
研究了一种流行的纺织染料欧米伽铬红ME对固氮蓝藻胶鞘念珠藻的毒性作用。发现当染料初始浓度为10和20毫克/升时，胶鞘念珠藻的生长受到抑制，而5毫克/升的低初始浓度对生长略有促进。使用煤、粉煤灰、硅灰石和瓷土等一些廉价且非常规的吸附剂通过吸附来去除染料。据观察，在所有情况下，低吸附质浓度、低温和酸性介质有利于染料去除过程。吸附过程遵循一级吸附速率表达式，并符合朗缪尔吸附模型。去除过程也部分受扩散控制。进行了热力学和pH研究以解释结果。
