College of Life Sciences, Northeast Forestry University

以农业废弃物稻秆为原料,采用水热+化学共沉淀法两步法制备了新型磁性水热炭(MHC),用于提高偶氮染料废水的厌氧脱色效率。采用X-射线衍射(XRD)、比表面测试(BET)、扫描电镜(SEM)、红外光谱分析(FTIR)等检测方法对制备的材料进行了表征。将材料引入厌氧污泥脱色体系中进行厌氧脱色实验,结果表明,在铬黑T浓度为300mg/L,溶液初始pH为7.0,温度为30℃,MHC投加量为5.0g/L,接种污泥量为20%的条件下,反应8h铬黑T的去除率可达96.3%,相比未投加材料组提高了15.6%。分别探究了污泥接种量、电子供体种类、MHC投加量、溶液初始pH和温度对于强化体系厌氧脱色效果的影响。强化体系的脱色效率随污泥接种率和MHC投加量的增加而提高,葡萄糖和蔗糖更适合作为电子供体,溶液pH越低染料去除率越高,最适合的反应温度为30℃。短期厌氧脱色实验结果表明,强化体系的微生物胞内活性氧水平增幅显著小于对照组,超氧化物歧化酶和过氧化氢酶活性更高。磁性水热炭有利于缓解不利环境对微生物的毒害作用。

A novel magnetic hydrothermal carbon (MHC) was prepared from agricultural waste ricestraw, using a two-step method combining hydrothermal carbonization and chemical co-precipitation.This material was used to improve anaerobic azo dye decolorization. It was characterized usingdetection methods such as X-ray diffraction (XRD), specific surface area testing (BET), scanningelectron microscopy (SEM), and infrared spectroscopy analysis (FTIR). The material was introducedinto an anaerobic sludge decolorization system. The results showed that under the conditions ofchromium black T concentration of 300 mg/L, initial solution pH of 7.0, temperature of 30 ℃, MHCdosage of 5.0 g/L, and 20% sludge inoculation, chromium black T removal reached 96.3% after 8 hours,which was 15.6% higher than that of the control. We investigated the effects of sludge inoculationEnergy Environmental Protectionamount, electron donor type, MHC dosage, initial solution pH, and temperature on the anaerobicdecolorization efficiency. Decolorization efficiency increased with high sludge inoculation rates andMHC dosage. Glucose and sucrose were more suitable as electron donors, and lower solution pH led tohigher dye removal rates. The optimal reaction temperature was determined to be 30 ℃. Short-termanaerobic decolorization experiments showed that a smaller increase in microbial reactive oxygenspecies levels in the enhanced system versus the control group, along with higher superoxide dismutaseand catalase activities. Magnetic hydrothermal carbon was beneficial for alleviating the toxic effects ofadverse environments on microorganisms.

黑龙江省自然科学基金资助项目(LH2022C002);中央高校基本科研业务费(2572021BD02)

田勇,马蕾,崔岱宗,等.新型磁性水热炭对偶氮染料废水厌氧脱色作用的研究[J].能源环境保护,2024,38(6):160−167.

TIAN Yong, MA Lei, CUI Daizong, et al. Study on anaerobic decolorization of azo dye wastewater using anew type of magnetic hydrothermal carbon[J]. Energy Environmental Protection, 2024, 38(6): 160−167.