共查询到20条相似文献，搜索用时 15 毫秒
1.
A novel β-PbO2 anode modified with fluorine resin was developed for typical pollutant electrocatalytic degradation and wastewater treatment. Various operating parameters such as applied voltage (3.5–10.5 V), pH (2–6), salinity of the electrolyte (0.5–2 g/L K2SO4) and initial phenol concentration (100–400 mg/L) were investigated to explore the electrocatalytic ability of the anode by taking phenol as sample. A preliminary study on dyeing wastewater treatment by this method indicated that the biodegradability could be increased to suit subsequent biological treatment. The stability of the anode has been proved to be high against acidity. The anode showed promising application for treatment of wastewater, especially of high salinity and high acidity wastewater. 相似文献
2.
采用价廉的涤纶滤膜作为电解体系隔膜,利用阴、阳极同时作用降解含酚工业废水,在反应时间80min,曝气量1.2L/min,电流密度30mA/cm2的最佳条件下,含酚废水COD去除率可达到80%,阴极室COD去除率高于阳极室。 相似文献
3.
本实验研究了以不锈钢片单独做阳极和以活性碳纤维毡片（＋不锈钢）的复合阳极对TNT废水电解效果的影响,并对电解机理进行了初步的探讨。原废水的TNT浓度为70—90mg／L,COD约为290—340mg／L,PH为7．5—9。实验数据显示,当槽电压为10V,PH值为3,外加电解质Na2SO4lg／L,极板间距为4era,电流密度为15mA／em。,搅拌转速为260r／min,电解2h时,以活性碳纤维＋不锈钢复合材料为阳极处理原废水,对TNT和COD的降解率分别为66．6％和55．5％,然而单独以不锈钢材料为阳极情况下,对TNT和COD的降解率仅为43．5％和24．7％。结果表明以活性碳纤维＋不锈钢复合材料为阳极对TNT废水中的有机物的电解效果显著,对实际工程废水处理有一定的指导意义。 相似文献
4.
Qing WEN Ying WU Li-xin ZHAO Qian SUN Fan-ying KONG 《Journal of Zhejiang University. Science. B》2010,11(2):87-93
A sequential anode-cathode double-chamber microbial fuel cell (MFC), in which the effluent of anode chamber was used as a continuous feed for an aerated cathode chamber, was constructed in this experiment to investigate the performance of brewery wastewater treatment in conjugation with electricity generation. Carbon fiber was used as anode and plain carbon felt with biofilm as cathode. When hydraulic retention time (HRT) was 14.7 h, a relatively high chemical oxygen demand (COD) removal efficiency of 91.7%–95.7% was achieved under long-term stable operation. The MFC displayed an open circuit voltage of 0.434 V and a maximum power density of 830 mW/m3 at an external resistance of 300 ?. To estimate the electrochemical performance of the MFC, electrochemical measurements were carried out and showed that polarization resistance of anode was the major limiting factor in the MFC. Since a high COD removal efficiency was achieved, we conclude that the sequential anode-cathode MFC constructed with bio-cathode in this experiment could provide a new approach for brewery wastewater treatment. 相似文献
5.
Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)·h and 0.44-0.59 (gCOD)/L respectively at 20 ℃-35 ℃. Activation energy (Ea) was 6.05×104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment. 相似文献
6.
杨伟柱 《广东轻工职业技术学院学报》2004,3(1):12-14
在一定的电解装置内研究可溶阳极（铁阳极）电解法处理漂染废水技术,探究废水的电流强度、pH值和电解时间对废水CODcr去除效果的影响规律。结果表明采用可溶阳极（铁阳极）法处理漂染废水的最佳工艺条件是：电解时间为20min时,电流强度为300～400mA．进水pH值5,5～6,处理后CODcr去除率达61.4％。 相似文献
7.
INTRODUCTIONInordertogetpliableandelegantterylenefabricjustlikesilk,terylenegreigeclothisalwayspretreatedwithalkali-decompositionprocesswh-ereinterylenegreigeclothishydrolyzedtosomeextentinNaOHsolutionatcertaintemperature(T)andpressure.Duringthisprocess,thesuperficialterylenefibreispeeledofffromtheclothanddis-solvedintosolution,inwhichteryleneacid(TA)andethyleneglycolaredischargedaspollutantsinwastewater.Theobtainedterylenefabricwithsi-lkenwrinkleandsoftfeelingiscalledartificialsilkfabr… 相似文献
8.
LI Zhen WU Ming-hong BAO Bo-rong XIANG Qun College of Sciences Shanghai University Shanghai China 《上海大学学报(英文版)》2000,(Z1)
1 IntroductionWasteWater containing phenol is a kind of industrialwaStowater that has eXtensive resources, and it isseriously hannful to our environxnent. Treatment ofwaSte water containing phenol by solvent extractionmethod generally selects extraCtants such as butylacetate, isopropyl ether, tributyl Phosphate (TBP) and N,N-di (l-methyl-heptyl) acetamide (N503) .to.['"]. Anew type of extractant, N-octanoylprplidine (OPOD),was synthesized in our laboratory for the first time.The experim… 相似文献
9.
The behavior of phenol of wastewater extraction by N-octanoylpyrrolidine (OPOD) in kerosene was studied. The
dependence of the extraction distribution ratios on the concentrations of extractant, phenol, acidity and temperature was investigated.
By means of the slope method, the composition of the extracted complex was deduced to be C6H5 · OPOD , and the related
thermodynamic functions were also calculated. The IR and NMR spectra showed the presence of intermolecular hydrogen bonding
between phenol and OPOD. The experimental results indicated that OPOD could extract phenol effectively. 相似文献
10.
Cr(VI) and phenol are toxic contaminants that need to be treated, and different methods have been researched to simultaneously remove these two contaminants from industrial wastewater. In this study, Cr(VI) was used as a novel Fenton-like catalyst in phenol degradation by H2O2. In the pH range of 3.0‒11.0, the degradation efficiency of phenol decreased with elevated pH. At pH = 3.0, 100 mg/L phenol was effectively degraded by 2 mmol/L Cr(VI) and 20 mmol/L H2O2. At pH = 7.0 and the same conditions as those of pH = 3.0, 79% of 100 mg/L phenol was removed within 6 h, which was an improvement in pH limitation compared with the Fe(II)-mediated Fenton reaction. Quenching experiments indicated that ·OH generated from the catalysis of H2O2 by Cr(V) instead of Cr(VI) was the primary oxidant that degraded phenol. When pyrophosphate was added in the Cr(VI)/H2O2 system, complexes with the Cr(V) intermediate rapidly formed and inhibited H2O2 decomposition, implying that the decomposition of H2O2 to ·OH was catalyzed by Cr(V) instead of Cr(VI). The presence of anions such as chloride and sulfate had insignificant effect on the degradation of phenol. TOC and UV analyses suggest that phenol could not be completely oxidized to CO2 and H2O, and the intermediates identified by high performance liquid chromatography further indicates that maleic acid and benzoquinone were intermediates which may be further degraded into short chain acids, primarily maleic, formic, acetic, and oxalic acids, and eventually into CO2 and H2O. Considering that more than 50% Cr(VI) can also be removed during this process, the Cr(VI)/H2O2 system is more appropriate for the simultaneous removal of Cr(VI) and phenol contaminants from industrial wastewater.
相似文献11.
Trimeric quaternary ammonium surfactants are newly developed surfactants, their widespread synthesis and utilization results in a great amount of scouring wasterwater of high COD, which is unmanageable. The present investigation aims to find a new type of organo-bentonites modified by the scouring wastewater and to treat the scouring wastewater at the same time. Results of adsorption experiments of phenol and formaldehyde by the modified bentonite show that, at the optimal ratio 24 % (W/V) of modified bentonite to scouring wastewater, the removal rate of phenol and formaldehyde by FTAT scouring wastewater modified bentonite is 3.53 times and 2.48 times higher than that of Na-bentonite, and the COD of treated scouring wastewater reduces to below 200 mg/L, meeting the second level of Standards for Discharge of Water Pollutants from the Ammonia Industry of China. 相似文献
12.
1IntroductionIn recent years,tri meric quaternary ammoniumsur-factants,which have three hydrophobic and three hy-drophilic groups connected bytwo spacer chains,havebeen developed[1-5].The tri meric surfactants appearunique physicochemical properties such … 相似文献
13.
徐功娣 《上海大学学报(英文版)》2006,10(2):179-184
1Introduction Dyeingwastewaterisakindofindustrialwastewater whichisdifficulttotreat.Itcontainsnotonlyhigh concentrationsofbiggermolecules,e.g.,nitryland aminocompounds,butalsoalargeamountofheavy metals,whicharetoxiccompositionformostof micro organisms.The… 相似文献
14.
李锐 《兰州石化职业技术学院学报》2014,(4):8-10
通过正交实验和单因素实验探索了Fenton氧化炼化废水中苯酚的最佳工艺条件。实验结果表明,Fenton试剂处理苯酚废水时,各影响因素的作用大小顺序是:p H反应温度H2O2投加量反应时间Fe SO4·7H2O投加量;最佳氧化反应条件为:p H=3.5,反应温度为20℃,H2O2投加量为12 m L·L-1,反应时间为30min,Fe SO4·7H2O投加量为450 mg·L-1,此时废水中苯酚的去除率为89.26%,残余苯酚含量为11.76 mg·L-1。因此,用Fenton氧化法处理含苯酚废水是一种非常有效的方法。 相似文献
15.
以苯酚作为唯一碳源和能源的无机盐培养液对从绝缘材料厂排放的活性污泥进行驯化,从中分离筛选到1株苯酚降解菌,编号为JY04.采用正交实验设计方法优化了该菌株固定化条件,并且考察了该固定化细胞降解苯酚的最适条件.结果表明:在固定化条件为海藻酸钠(SA)浓度为5%,湿菌重/包埋剂为6/30,CaCl2浓度为3%时,固定化时间为8 h,降解率可达82.6%,并具有较好的机械强度.确定其对苯酚降解最适条件为pH 7.0,苯酚浓度为400 mg/L,温度32℃,接种量为25 g,培养时间42 h,其苯酚的降解率可达97.3%.该菌株固定化细胞的降解苯酚能力和耐受苯酚能力均大于游离细胞.固定化菌株对苯酚有较强的降解和耐受能力,是处理苯酚废水的良好菌种资源. 相似文献
16.
研究电化学方法制备高铁酸钾,通过单因素实验确定最佳工艺条件为:电解液KOH浓度16 mol/L,电解时间为6 h,反应温度为65 ℃,阳极表观电流密度为50 A/m2,制得高铁酸钾的浓度可达5.72 mmol/L。对高铁酸钾强化电动修复技术去除土壤中的苯酚进行初探,结果表明该技术可以大幅度提高苯酚污染的修复效能,在反应120 h后,苯酚的去除率可达到90%以上,而且产生的Fe(OH)3固体无毒无害,不会对环境造成二次污染。 相似文献
17.
采用高效液相色谱法(HPLC)直接测定工业废水中苯、β-苯乙醇、苯酚等苯系物污染物。用最小二乘法求得各组分相应的线性回归方程及其相关系数,在给定范围内线性较好,其相关系数均在0.9990以上。苯、β-苯乙醇、苯酚的回收率分别为96.67%、98.00%、99.90%。HPLC法测定的精密度及准确度均能满足工业废水中挥发性有机物分析测定的要求。 相似文献
18.
应用PSB处理黄姜皂素废水的试验研究 总被引：1，自引：0，他引：1
皂素废水是一种酸度高、色度大、可生化性差的工业有机废水,利用光合细菌处理黄姜皂素生产废水并对影响因素进行试验研究的结果表明,在预处理后的废水中添加4．0‰酵母膏,pH7．5,接种量30％,光照条件2000Lx,温度30℃环境下处理6d,CODcr去除率最高。 相似文献
19.
炼钢污泥制备聚合硫酸铁铝絮凝剂及应用研究 总被引：3，自引：1，他引：2
研究了以炼钢污泥为原料制备聚合硫酸铁铝（PFAS）的方法,确定了合理的生产工艺和制备条件,用该絮凝剂处理焦化废水,并与聚合硫酸铁（PFS）的处理效果比较,结果表明,出水的CODCr、总氰化物、挥发酚、色度去除率分别提高约16.9%、12.5%、5.1%和5.3%。 相似文献