Study on Preparation and Dyeing Wastewater Adsorption Properties of Carbonized Cotton

The attapulgite microspheres were produced by spray drying method and calcination process subsequently. The effects of calcination temperature on the microstructure and adsorption properties of methylene blue(MB) were investigated systematically. Results show that the median diameter of the microspheres increases after calcination. The adsorption capacity and removal efficiency of MB reaches the maximum values(96.62mg/g and 96.6%) after calcined at 600°C and decreases with the temperature increasing. The adsorption process can be described better by the pseudo-second-order kinetic model and fit the the Langmuir equation. The attapulgite microsphere shows good adsorption properties, which may be used as potential applications in various dyeing wastewater fields.

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Preparation and Adsorption Properties of PDMDAAC Modified Bentonite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.1226 ◽

2011 ◽

Vol 399-401 ◽

pp. 1226-1229

Author(s):

Hong Shao ◽

Ning Cao ◽

Da Wei Wang

Keyword(s):

Adsorption Properties ◽

Dyeing Wastewater ◽

X Ray Diffraction ◽

Modified Bentonite ◽

Preparation Conditions ◽

Treatment Agent ◽

Optimized Conditions ◽

Decoloration Rate ◽

Interplanar Space

A novel environmentally friendly water treatment agent was prepared by the natural bentonite and PDMDAAC. The treatment effect of direct black G dyeing wastewater on different preparation conditions was studied. The decoloration rate reached 98.57% under the optimized conditions (cross-linker concentration of 40g/L, M-V of 12 g/L, contact time of 75min, particle size of 0.124mm). The performance characterization of the modified bentonite was observed by means of X-ray diffraction, scanning electron microscopy. The PDMDAAC has entered into the bentonite interplanar space. The adsorption properties of bentonite were improved, which was suitable for the treatment of dyeing wastewater.

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Superior Adsorption Properties of Dyeing Wastewater on PDMDAAC Modified Bentonite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.386 ◽

2011 ◽

Vol 356-360 ◽

pp. 386-390

Author(s):

Hong Shao ◽

Ning Cao

Keyword(s):

Industrial Wastewater ◽

Treatment Process ◽

Orthogonal Experiment ◽

Adsorption Properties ◽

Dyeing Wastewater ◽

Reaction Conditions ◽

Complex Composition ◽

Modified Bentonite ◽

Optimized Conditions ◽

Decoloration Rate

With the development of printing and dyeing industry, the nation has become the world's largest dye production and use country. With the complex composition and high color, the dyeing wastewater was currently recognized as one of the more difficult industrial wastewater to deal with. The bentonites was modified by PDMDAAC and applied into the treatment of dyeing wastewater. The treatment process was optimized with the index of decoloration rate. The decoloration rate reached 99.76% under the optimized conditions of adsorbent dosage=2g/L, pH=11, adsorption time=80min, stirring speed=350r/min, solution concentrate=500mg/L. The orthogonal experiment was designed to investigate the interaction between various reaction conditions. The superiority of PDMDAAC modified bentonite was confirmed by the comparing experiment.

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