共查询到19条相似文献，搜索用时 750 毫秒
1.
氨氮废水是水体富营养化和环境污染的一种重要污染物质。通过聚合氯化铝对硅藻土进行改性,用改性后的硅藻土处理氨氮废水。研究改性硅藻土的投加量、氨氮废水的温度、pH、吸附时间对氨氮废水的影响。研究结果表明,投加量为2.5g/100mL,pH值为4,反应温度为40℃,振荡吸附时间30min时处理效果最好,氨氮的去除率达到79.02%。在适宜条件下,改性硅藻土对氨氮废水的处理具有显著的效果。 相似文献
2.
对改性粉煤灰处理含铅废水进行了实验研究,结果表明,对铅离子的去除效果优于等量未改性粉煤灰和活性炭。吸附时间、废水的pH值、吸附剂用量、温度以及废水中Pb2＋浓度都能影响改性粉煤灰的吸附效果。最适宜的吸附条件是：在室温,pH=8．0,吸附剂用量为1．0g,Pb2＋含量小于0．005mol／L,吸附15min时,改性粉煤灰对废水中Pb2＋的吸附达到饱和。 相似文献
3.
钱美荣 《十堰职业技术学院学报》2010,23(6):91-93
研究了镁盐絮凝剂对含氟地下水的处理效果。试验结果表明,单独投加氧化钙粉末不能有效去除含氟地下水中的氟,而且投加量过大会产生大量沉淀,而投加镁盐絮凝剂与氧化钙粉末联合处理,除氟效果较好。当镁盐絮凝剂投加量为0.8%,氧化钙粉末调节pH=11,搅拌时间为5 min时,氟离子去除率达到93%,出水氟离子浓度达到我国饮用水卫生标准。此方法处理效果好,不会造成二次污染,在国内未见报道。 相似文献
4.
以某太阳电池生产企业车间高氟废水为处理对象,采用La-腐殖酸/Al2O3气凝胶复合物(LHAGC)对二级絮凝后的含氟废水进行深度处理,观察吸附剂投加量、吸附时间和吸附pH对废水中氟化物去除效果的影响,并通过动态实验分析吸附剂对氟化物的动态吸附特征．结果表明：当吸附剂投加量为5g/L,吸附时间为45min,pH范围为5～7时氟化物去除率最高,离子态氟的去除率为80%,总氟化物的去除率为94%,络合态氟的去除率为99%,处理出水中总氟化物低于《电池工业污染物排放标准》(GB30484-2013)的排放限值70%;利用Thomas模型可较好地描述LHAGC对废水中氟化物的动态吸附特征,其饱和吸附量为36.013mg/g. 相似文献
5.
采用高温和酸分别对粉煤灰进行改性,对比了改性后的粉煤灰对焦化废水深度处理的效果,确定了最佳工艺条件。结果表明,焦化废水COD135~170mg/L,NH3-N 96~135mg/L,体积150mL,pH值5,改性粉煤灰投加量25g,粒径100~160目,吸附时间60min,石灰量0.25g,高温改性粉煤灰对焦化废水COD和氨氮的去除率分别达到了85.2%和89.6%,而酸改性粉煤灰对焦化废水COD和氨氮的去除效果劣于高温改性粉煤灰,去除率分别为78.3%和82.7%。 相似文献
6.
7.
游东宏 《宁德师专学报(自然科学版)》2011,23(3):243-246
提出用改型牡蛎壳去除Fe3＋离子废水的新方法．在常压静态吸附实验中Fe3璃子浓度为1mg/L温度为30℃,pH值为3,实验结果表明：处理时间为1h时去除效率最高．在动态吸附实验条件下得出Fe3＋单位质量滤料的工作吸附量为0．1736mg．利用改性牡蛎壳材料处理含Fe3＋离子废水,具有去除效果较好,操作简单等优点,以废治废,具有双重利用价值． 相似文献
8.
采用静态吸附法研究活性炭和硅藻土对3种实验废水在不同吸附条件下(吸附剂量、时间、pH值)的吸附效果。结果表明活性炭在投加量为40 g/L,振荡时间为1 h,无机、有机、混合样品pH分别为4、6、10时,可使样品色度和COD去除率达到最佳效果;硅藻土在投加量为30 g/L,振荡时间为20 min时,无机、有机、混合样品pH分别为8、4、4时,可使废水COD去除率达50%以上,但色度去除效果较差。实验表明硅藻土和活性炭串联吸附为较优方案。 相似文献
9.
改性木屑处理含铬重金属废水的研究 总被引：1，自引：0，他引：1
用NH4Fe(SO4)2溶液对木屑进行改性,并将其应用于含铬废水的处理,探讨了木屑用量、pH值、处理时间、温度等因素对铬离子去除率的影响.结果表明,经改性处理过的木屑在用量为40 g/L,pH值为2,吸附时间为60min,吸附温度为30℃的条件下,处理含铬废水的去除率可达70%左右;在调节pH值和溶入的Fe3 所产生的絮凝作用下,可使去除率达99%. 相似文献
10.
本文利用煤系硫铁矿对含汞废水的处理进行了研究.实验证明,废水的pH值、所用煤系硫铁矿矿石的粒度、反应温度、吸附时间及搅拌方式对汞的去除率有显著的影响.用还原铁粉对煤系硫铁矿(粒径为0.08mm)进行改性后,去除效果明显提高;当还原铁粉与煤系硫铁矿的配比为40:100、处理温度为200～250℃时,除汞效果最好. 相似文献
11.
近年来,硅藻土的优良特性被广泛认识,使其逐渐被应用于各类废水处理研究中。本文对硅藻土在废水处理中的应用研究现状进行综述和分析,并指出了目前研究中存在的不足以及今后的研究趋势。 相似文献
12.
An improved configuration of the membrane stack was adopted in the electrodeionization （EDI） cell to prevent precipitation of bivalent metal hydroxide during the running. The operational parameters that influenced the removal of copper ions from the dilute solution were optimized. The result showed that a moderate decrease in the inlet pH value and a moderate increase in the applied voltage could achieve a better removal effect. The steady process of electroplating wastewater treatment could be achieved with a removal efficiency of more than 99.5% and an enrichment factor of 5-14. The concentration of copper in purified water was less than 0.23 mg/L. This demonstrated the applicability of recovering heavy metal ions and purified water from electroplating effluent for industrial reuse. 相似文献
13.
14.
15.
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
16.
综述了好氧颗粒污泥技术在污废水处理工程中的研究情况.好氧颗粒污泥在实验室的阶段的研究主要集中于在高浓度有机废水处理、有毒有机物降解及脱氮除磷方面的研究,研究成果较为突出,多侧重于用各种模拟废水研究好氧颗粒污泥的形成条件.在实际污废水处理工程中的应用主要集中于对生活污水和工业废水的处理研究,侧重于工程中的处理效果,缺少对形成机理和运行条件方面的研究.在阐述国内外已有研究成果基础上,从多方面展望好氧颗粒污泥的研究方向和应用前景. 相似文献
17.
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
18.
纳米TiO2是一种新型的高性能无机材料．在分析纳米TiO2光催化降解原理的基础上,介绍了光催化技术在各种有机工业废水、生活废水处理中的应用,并在总结分析含有机物废水处理应用的基础上对其发展方向和应用前景进行了展望． 相似文献
19.
A treatability study of industrial wastewater containing chlorinated nitroaromatic compounds (CNACs) by a catalytic ozonation process (COP) with a modified Mn/Co ceramic catalyst and an aerobic sequencing batch reactor (SBR) was investigated.A preliminary attempt to treat the diluted wastewater with a single SBR resulted in ineffective removal of the color,ammonia,total organic carbon (TOC) and chemical oxygen demand (COD).Next,COP was applied as a pretreatment in order to obtain a bio-compatible wastewater for SBR treatment in a second step.The effectiveness of the COP pretreatment was assessed by evaluating wastewater biodegradability enhancement (the ratio of biology oxygen demand after 5 d (BOD5) to COD),as well as monitoring the evolution of TOC,carbon oxidation state (COS),average oxidation state (AOS),color,and major pollutant concentrations with reaction time.In the COP,the catalyst preserved its catalytic properties even after 70 reuse cycles,exhibiting good durability and stability.The performance of SBR to treat COP effluent was also examined.At an organic loading rate of 2.0 kg COD/(m3·d),with hydraulic retention time (HRT)=10 h and temperature (30±2) °C,the average removal efficiencies of NH3-N,COD,BOD5,TOC,and color in a coupled COP/SBR process were about 80%,95.8%,93.8%,97.6% and 99.3%,respectively,with average effluent concentrations of 10 mg/L,128 mg/L,27.5 mg/L,25.0 mg/L,and 20 multiples,respectively,which were all consistent with the national standards for secondary discharge of industrial wastewater into a public sewerage system (GB 8978-1996).The results indicated that the coupling of COP with a biological process was proved to be a technically and economically effective method for treating industrial wastewater containing recalcitrant CNACs. 相似文献