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对模拟印染废水中酸性紫红-10B染料的萃取资源化回收过程进行了研究,考察了各工艺参数对萃取效率的影响。结果表明:萃取回收资源化技术是可行的,在探索的工艺条件范围内,萃取率均超过96.0%。其中萃取剂正辛醇组成分数和油/水体积比对萃取效率有显著影响。萃取最佳工艺条件为:萃取剂组成三辛胺/正辛醇/石油醚体积比为20/10/70;油水体积比为1/1;染料溶液pH值为2.5;萃取搅拌时间为5 min;静置时间为15 min。 相似文献
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Removal of Methyl Violet from aqueous solutions using poly (acrylic acid.co-acrylamide)/attapulgite composite 总被引:3,自引:0,他引:3
The adsorption of Methyl Violet (MV) cationic dye from aqueous solution was carried out by using crosslinked poly (acrylic acid-co-acrylamide)/attapulgite (Poly(AA-co-AM)/ATP) composite as adsorbent. The factors influencing adsorption capacity of the composite such as pH, concentration of the dye, temperature, contact time, adsorbent dosage, ionic strength and surfactant were systematically investigated. The equilibrium data fitted very well to the Langmuir isotherm and the maximum adsorption capacity reached 1194 mg/g at 30°C. The thermodynamic parameters including G0, △H0 and △S 0 for the adsorption processes of MV on the composite were also calculated, and the negative △H0 and △G0 confirmed that the adsorption process was exothermic and spontaneous. The kinetic studies showed that the adsorption process was consistent with the pseudo second-order kinetic model and the desorption studies revealed that the regeneration of the composite adsorbent can be easily achieved. 相似文献
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水中油的测定方法探讨 总被引:9,自引:0,他引:9
探讨了重量法,紫外光度法测定水中石油类的合适条件和动物油,植物油的干扰。按选定的操作方法测定,取得了满意结果。提供了一个处理石油醚的简单方法。 相似文献
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A simple and efficient biosorbent prepared from powdered mycelial biomass of Ceriporia lacerata was used to removal Crystal Violet, poorly degraded as recalcitrant molecule by microorganism. 相似文献
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Inbasekaran Muthuvel Balu Krishnakumar Meenakshisundaram Swaminathan 《环境科学学报(英文版)》2012,24(3):529-535
Fe(Ⅲ) immobilized fire clay (Fe-FC) was prepared using ferric nitrate by solid state dispersion method and this hetero-Fenton catalyst was applied for the degradation of Acid Violet 7 (AV 7) under natural sunlight. The 26% ferric nitrate loaded fire clay was found to be most efficient. The experimental conditions such as solution pH, H2O2 concentration for efficient degradation of AV 7 have been determined. Unlike Fenton catalyst, Fe-FC is photoactive over a wide pH range of 3-7. This catalyst was found to be stable and reusable. The GC-MS analysis of experimental solutions during irradiation revealed the formation of 2,8-diaminonaphthalene-1,3,6-triol, 8-aminonaphthalene-1,2,3,6-tetrol, 2-aminonaphthalene-1,3,6,8-tetrol and 2-aminobenzene-1,3-diol/5-aminonbenzene-1,3-diol/ 2-aminobenzene-1,4-diol as intermediates. The 26% ferric nitrate loaded fire clay was characterized by XRD, ICP-AES, BET surface area, FT-IR, SEM-EDS and UV-DRS studies. 相似文献
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G. K. Parshetti S. G. Parshetti A. A. Telke D. C. Kalyani R. A. Doong P. Govindwar 《环境科学学报(英文版)》2011,23(8):1384-1393
Agrobacterium radiobacter MTCC 8161 completely decolorized the Crystal Violet with 8 hr (10 mg/L) at static anoxic conditions.
The decreased decolorization capability by A. radiobacter was observed, when the Crystal Violet concentration was increased
from 10 to 100 mg/L. Semi-synthetic medium containing 1% yeast extract and 0.1% NH4Cl has shown 100% decolorization of
Crystal Violet within 5 hr. A complete degradation of Crystal Violet by A. radiobacter was observed up to 7 cycles of repeated
addition (10 mg/L). When the effect of increasing inoculum concentration on decolorization of Crystal Violet (100 mg/L) was
studied, maximum decolorization was observed with 15% inoculum concentration. A significant increase in the activities of laccase
(184%) and aminopyrine N-demethylase (300%) in cells obtained after decolorization indicated the involvement of these enzymes
in decolorization process. The intermediates formed during the degradation of Crystal Violet were analyzed by gas chromatography
and mass spectroscopy (GC/MS). It was detected the presence of N,N,N′,N′′-tetramethylpararosaniline, [N; N-dimethylaminophenyl]
[N-methylaminophenyl] benzophenone, N; N-dimethylaminobenzaldehyde, 4-methyl amino phenol and phenol. We proposed the
hypothetical metabolic pathway of Crystal Violet biodegradation by A. radiobacter. Phytotoxicity and microbial toxicity study showed
that Crystal Violet biodegradation metabolites were less toxic to bacteria (A. radiobacter, P. aurugenosa and A. vinelandii) contributing
to soil fertility and for four kinds of plants (Sorghum bicolor, Vigna radiata, Lens culinaris and Triticum aestivum) which are most
sensitive, fast growing and commonly used in Indian agriculture. 相似文献
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