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Two-sectional struvite formation process for enhanced treatment of copper-ammonia complex wastewater 被引量:5
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作者 柴立元 彭聪 +5 位作者 闵小波 唐崇俭 宋雨夏 张阳 张静 Mohammad ALI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第2期457-466,共10页
Mg2+ and PO43+ were added into the synthetic wastewater, leading to the dissociation of the complex ions in the wastewater, and resulting in removal of copper and ammonia therein. The effects of agents addition amo... Mg2+ and PO43+ were added into the synthetic wastewater, leading to the dissociation of the complex ions in the wastewater, and resulting in removal of copper and ammonia therein. The effects of agents addition amount, pH, and reaction time on the removal efficiency of copper and ammonia were investigated. In particular, two-sectional struvite formation (TSSF) process was established for copper and ammonia removal. MgCl2 and Na2HPO4 were added by following 90% addition in the first section and remained 10% in the second during the TSSF process. Compared with one sectional struvite formation, TSSF possessed much better performance. Under condition of n(NH3-N):n(Mg):n(P)=1:1.2:1.5 (molar ratio), pH=9, and reaction time of 30 min, the removal efficiencies of copper and ammonia were 98.9% and 99.96%, respectively. The enhanced performance of TSSF is explained by the competition of ammonia by copper?ammonia complexes and struvite. The dissociation of copper-ammonia complexes is further demonstrated by thermodynamic equilibrium analysis, on the basis of calculations and establishment of predominance phases diagram. Moreover, XRD and EDS analyses further confirmed the formation of struvite and precipitation of copper, which prove the transmission of copper and ammonia from liquid phase into solid phase. 展开更多
关键词 STRUVITE copper-ammonia complex ammonia removal heavy metal wastewater PRECIPITATION
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Treatment of nickel-ammonia complex ion-containing ammonia nitrogen wastewater 被引量:1
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作者 闵小波 周敏 +2 位作者 柴立元 王云燕 舒余德 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第5期1360-1364,共5页
Air stripping was adopted to treat nickel ammonia complex ion-containing wastewater in order to remove nickel and ammonia simultaneously in one technological process.The relationship among pH,the concentration of nick... Air stripping was adopted to treat nickel ammonia complex ion-containing wastewater in order to remove nickel and ammonia simultaneously in one technological process.The relationship among pH,the concentration of nickel ammonia complex ion and total ammonia concentration was analyzed theoretically.Influence of pH value,water temperature,airflow rate and time on air stripping was studied in detail by static experiment in laboratory.The results show that at pH 11,temperature of 60℃and airflow rate of 0.12 m3/h,NH3 and Ni 2+concentrations remained in wastewater are less than 2 and 0.2 mg/L,respectively,after blowing for 75 min,which reaches the standard of the state discharge.When the tail gas is absorbed by 0.5 mol/L H2SO4 in order to avoid the secondary pollution,the absorption rate can achieve 70%. 展开更多
关键词 含氨氮废水 镍离子 复合 治疗 国家排放标准 气流速度 pH值 氨浓度
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Comparison of zinc complexation properties of dissolved organic matter from surface waters and wastewater treatment plant effluents
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作者 CHENGTao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第4期535-539,共5页
Unlike natural organic matter(NOM), wastewater organic matter(WWOM) from wastewater treatment plant effluents has not been extensively studied with respect to complexation reactions with heavy metals such as copper or... Unlike natural organic matter(NOM), wastewater organic matter(WWOM) from wastewater treatment plant effluents has not been extensively studied with respect to complexation reactions with heavy metals such as copper or zinc. In this study, organic matter from surface waters and a wastewater treatment plant effluent were concentrated by reverse osmosis(RO) method. The samples were treated in the laboratory to remove trace metals and major cations. The zinc complexing properties of both NOM and the WWOM were studied by square wave anodic stripping voltammetry(SWASV). Experimental data were compared to predictions using the Windermere Humic Aqueous Model(WHAM) Version VI. We found that the zinc binding of WWOM was much stronger than that of NOM and not well predicted by WHAM. This suggests that in natural water bodies that receive wastewater treatment plant effluents the ratio of WWOM to NOM must be taken into account in order to accurately predict free zinc activities. 展开更多
关键词 zinc complexation organic matter SWASV wastewater
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Coordination configurations of cupric tartrate in electronic industry wastewater 被引量:1
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作者 Ming-jun HAN Jian-yong HE +5 位作者 Wei SUN Sai LI Heng YU Tong YUE Xin WEI Chen-yang ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3753-3766,共14页
The coordination structure of cupric tartrate(Cu−TA)complex was investigated by ultraviolet−visible(UV-Vis)and liquid chromatography/mass spectrometer(LC-MS)firstly;furthermore,effective coordination configurations an... The coordination structure of cupric tartrate(Cu−TA)complex was investigated by ultraviolet−visible(UV-Vis)and liquid chromatography/mass spectrometer(LC-MS)firstly;furthermore,effective coordination configurations and electronic properties of Cu−TA in aqueous solution were systematically revealed by density functional theory(DFT)calculations.Consistently,Job plots show the possible existence of[Cu(TA)]and[Cu(TA)_(2)]^(2-)at 230 and 255 nm based on UV-Vis results.LC-MS results confirm the existence of the single and high coordination complexes[Cu_(2)(TA)_(2)]^(+),[Cu(TA)_(2)]^(+)and[Cu_(2)(TA)_(3)(H_(2)O)_(2)(OH)_(2)]^(2+).DFT calculation results show that carboxylic oxygen and hydroxyl oxygen of tartaric acid(TA)are preferred sites for Cu(Ⅱ)coordination.[Cu(TA)](1H,3H sites O of TA coordinated with Cu(Ⅱ)),[Cu(TA)_(2)]^(2-)(two 1^(C),2^(H) sites O of TA coordinated with Cu(Ⅱ)),and[Cu(TA)_(3)]^(4-)(three 2H,3H sites O of TA coordinated with Cu(Ⅱ))should be dominant coordination configurations of Cu−TA.The corresponding Gibbs reaction energies are-170.1,-136.2,and-90.2 kJ/mol,respectively. 展开更多
关键词 electronic industry wastewater copper tartaric acid cupric tartrate complex coordination configuration density functional theory
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New Combination Eco-Treatment Process Suitable for Decentralized Wastewater
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作者 Liang Shen,Xinying Lian,Xiaoqiang Chen,Jingxian Qi School of Water Resources & Environment,China University of Geosciences(Beijing),Beijing 100083,China. 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期144-144,共1页
At present,as the majority of nursing homes, resorts,villages,villas and other decentralized living areas are far away from municipal sewer system,it is difficult to transport municipal waste water to city sewage trea... At present,as the majority of nursing homes, resorts,villages,villas and other decentralized living areas are far away from municipal sewer system,it is difficult to transport municipal waste water to city sewage treatment plants for processing.If the large quantity of decentralized wastewater were directly discharged to the rivers,lakes or other receiving water body without treatment,seriously contaminate to surface water and groundwater occurred.According to the analysis on characteristics of distributed 展开更多
关键词 DECENTRALIZED wastewater bio-leaching SEPTIC tanks CONSTRUCTED WETLAND complex medium
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Performance of Micelle-Clay Filters for Removing Pollutants and Bacteria from Tertiary Treated Wastewater
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作者 Mustafa Khamis Rafik Karaman +4 位作者 Mohannad Qurie Jehad Abbadit SamehNusseibeh Adnan Manassra Shlomo Nir 《Journal of Environmental Science and Engineering(A)》 2012年第2期160-168,共9页
Filters filled with a micelle-clay complex mixed with sand were employed to investigate their purification capability of tertiary treated wastewater with loose UF-membranes. The UF membrane was hollow fiber with a mol... Filters filled with a micelle-clay complex mixed with sand were employed to investigate their purification capability of tertiary treated wastewater with loose UF-membranes. The UF membrane was hollow fiber with a molecular weight cutoff of 100 kD. The complex was prepared from the organic cation octadecyltrimethylammonium (ODTMA) and the negatively charged clay-mineral, montmoriIIonite. This complex has a very large surface area, which includes large hydrophobic domains and is positively charged, about half of the cation exchange capacity of the clay. Two sets of filtration experiments were carried out at flow rates of 1.2 and 50 mL/min, which correspond to flow velocities of 3.7 and 153 cm/h, respectively. In the first case, after a passage of 1 L, the turbidity, total suspended solids (TSS), fecal coliforms (FC), and total coliforms (TC) were reduced to zero from 14 NTU, 6 ppm, 350 and 10,000 counts per 100 mL, respectively. In the second case, the numbers of FC and TC were reduced from 50,000/100 mL to zero after the passage of 14 L. The values of COD and BOD were reduced several-fold. The conclusion is that the incorporation of micelle-clay filters in the sewage treatment system with loose tertiary capability is promising and warrants larger scale experiments for optimization of the overall system. 展开更多
关键词 Clay-micelle complex wastewater treatment chemical oxygen demand biological oxygen demand microbial removal.
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深圳沙河水质净化厂及3#调蓄池工艺设计要点及特点
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作者 黄文章 王子龙 《净水技术》 CAS 2024年第6期169-178,共10页
沙河水质净化厂设计规模为旱季10万m^(3)/d,雨季额外处理10万m^(3)/d初期雨水,3#调蓄池设计规模为15.3万m^(3)。污水及初期雨水处理采用预处理+多段厌氧-好氧(AO)+二沉池+磁混凝高效沉淀池+精密过滤+紫外消毒的工艺,出水水质执行深圳市... 沙河水质净化厂设计规模为旱季10万m^(3)/d,雨季额外处理10万m^(3)/d初期雨水,3#调蓄池设计规模为15.3万m^(3)。污水及初期雨水处理采用预处理+多段厌氧-好氧(AO)+二沉池+磁混凝高效沉淀池+精密过滤+紫外消毒的工艺,出水水质执行深圳市地方标准《水质净化厂出水水质规范》(DB 4403/T 64—2020)B级标准,其中总氮(TN)≤8 mg/L。污泥处理采用离心浓缩+低温热干化工艺,处理后含水率≤40%。作为国内首个将水质净化厂与初期雨水调蓄池深度融合的全地下式水污染治理综合体,项目采用多段AO耦合“3W法”(Wet-Weather-Wastewater法),并以此为核心提出了一种实现大规模污水及初期雨水高标准协同处理的系统解决方案,且无需大幅度增加污水处理设施体量、投资和运行成本。 展开更多
关键词 地下式水质净化厂 3#调蓄池 水污染治理综合体 协同处理 多段AO “3W法”
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铁-三联吡啶配合物活化高碘酸盐体系构建及其对染色废水的催化降解机制
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作者 武守营 黄启超 +4 位作者 张开封 张琳萍 钟毅 徐红 毛志平 《纺织学报》 EI CAS CSCD 北大核心 2024年第6期105-112,共8页
为开发新型、高效的染色废水处理方法,通过铁-三联吡啶(Fe^(Ⅲ)(tpy)C_(l3))配合物活化高碘酸盐(PI)构建了Fe^(Ⅲ)(tpy)C_(l3)/PI催化氧化体系。在此基础上,采用酸性红1(AR1)作为染色废水模型污染物测试了该体系的催化降解性能,并通过... 为开发新型、高效的染色废水处理方法,通过铁-三联吡啶(Fe^(Ⅲ)(tpy)C_(l3))配合物活化高碘酸盐(PI)构建了Fe^(Ⅲ)(tpy)C_(l3)/PI催化氧化体系。在此基础上,采用酸性红1(AR1)作为染色废水模型污染物测试了该体系的催化降解性能,并通过捕获和探针实验研究了Fe^(Ⅲ)(tpy)C_(l3)配合物活化PI降解酸性红1的机制。结果表明:Fe^(Ⅲ)(tpy)C_(l3)配合物能够高效活化PI实现酸性红1的快速降解,15 min内对AR1的去除率高达98%;Fe^(Ⅲ)(tpy)C_(l3)/PI体系对酸性红1的降解符合伪一级动力学模型,同时酸性红1的降解速率常数随Fe^(Ⅲ)(tpy)C_(l3)配合物和PI浓度的增加而呈线性增加;在Fe^(Ⅲ)(tpy)C_(l3)/PI体系中包含超氧自由基、单线态氧以及高价铁,这些活性物质共同促进酸性红1的降解;该体系不仅对多种有机物的降解表现出普适性,同时催化降解过程不受溶液pH值以及常见无机盐离子的干扰。 展开更多
关键词 配合物 高碘酸盐 染色废水 降解 催化机制 废水处理 铁-三联吡啶
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二硫化钼-水滑石复合材料对水中Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)的吸附机制
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作者 苏欣悦 李静 +3 位作者 于海琴 温蓓 裴志国 闫良国 《环境化学》 CAS CSCD 北大核心 2024年第2期454-463,共10页
二维层状纳米材料可以有效去除水中的重金属,而吸附机制一直是研究难点和热点.为进一步提升材料性能,明确吸附反应机制,以典型的水滑石和二硫化钼为原料,采用共沉淀法制备镁铝水滑石,然后利用水热法负载二硫化钼,制备了复合材料(MoS_(2)... 二维层状纳米材料可以有效去除水中的重金属,而吸附机制一直是研究难点和热点.为进一步提升材料性能,明确吸附反应机制,以典型的水滑石和二硫化钼为原料,采用共沉淀法制备镁铝水滑石,然后利用水热法负载二硫化钼,制备了复合材料(MoS_(2)-LDH).结果表明,MoS_(2)-LDH对水中Cd(Ⅱ)、Pb(Ⅱ)和Cu(Ⅱ)的吸附作用机制包括沉淀、络合、同晶置换和静电吸引作用,其中沉淀作用为主导,贡献率占46.57%—58.32%,其次为络合作用(27.15%—32.08%)和同晶置换作用(10.75%—17.86%),静电吸引的贡献最小(3.33%—4.26%);吸附过程与拟二级动力学方程和Langmuir模型相符,最大吸附量达到48.31、71.33、77.16 mg·g^(-1).对高效去除重金属的吸附机制的详细研究,可为二维复合材料的设计合成提供理论支撑. 展开更多
关键词 重金属废水 吸附机制 沉淀 络合作用
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泰妙菌素废盐活性炭的制备及吸附EDTA-Pb(Ⅱ)的研究
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作者 胡雅 孙晓蕾 +1 位作者 陆静宇 孙秀云 《工业水处理》 CAS CSCD 北大核心 2024年第8期133-139,148,共8页
工业废水中的有机配体和重金属离子结合形成络合态重金属,络合态重金属的排放会导致严重的环境及人体健康问题。采用热解炭化法将医药固体废弃物——泰妙菌素废盐制备成废盐活性炭(WSAC)并用于去除模拟废水中的EDTA-Pb(Ⅱ),利用SEM、BE... 工业废水中的有机配体和重金属离子结合形成络合态重金属,络合态重金属的排放会导致严重的环境及人体健康问题。采用热解炭化法将医药固体废弃物——泰妙菌素废盐制备成废盐活性炭(WSAC)并用于去除模拟废水中的EDTA-Pb(Ⅱ),利用SEM、BET表征WSAC的性质;基于静态吸附试验研究了溶液初始pH、共存离子对WSAC吸附EDTA-Pb(Ⅱ)行为的影响;通过吸附动力学、等温线拟合,利用FTIR、TOC、Zeta电位等表征探究其吸附机理。结果表明:WSAC对EDTA-Pb(Ⅱ)的吸附过程符合伪一级动力学和Langmuir模型,吸附速率受物理过程主导且为单分子层均相吸附;随着pH的升高,WSAC对EDTA-Pb(Ⅱ)的吸附效果降低;共存阴离子的加入会与EDTA-Pb(Ⅱ)竞争吸附位点,对吸附起抑制作用;WSAC对EDTA-Pb(Ⅱ)的吸附机制主要为孔隙填充和静电吸附的协同作用。将WSAC用于吸附工业废水中的EDTA-Pb(Ⅱ),为泰妙菌素废盐的资源化利用提供一种途径,也为工业废水中EDTA-Pb(Ⅱ)的去除提供新方法。 展开更多
关键词 工业废水 络合态重金属 EDTA-Pb(Ⅱ) 泰妙菌素废盐 吸附
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配体-金属电子转移强化类芬顿技术的破络特性与机制
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作者 荆世超 李杰 +2 位作者 王赟 宋丽 刘福强 《土木与环境工程学报(中英文)》 CSCD 北大核心 2024年第4期220-230,共11页
为有效分解近中性废水中典型难降解强络合物Ni-EDTA,构建配体-金属电子转移强化类芬顿技术(LFGR),基于Ni(Ⅱ)去除效能等系统分析其在近中性条件下对Ni-EDTA的破络特性,重点探究Fe(Ⅲ)与H2O2投加量、pH值、浊度、常见有机酸与常规无机盐... 为有效分解近中性废水中典型难降解强络合物Ni-EDTA,构建配体-金属电子转移强化类芬顿技术(LFGR),基于Ni(Ⅱ)去除效能等系统分析其在近中性条件下对Ni-EDTA的破络特性,重点探究Fe(Ⅲ)与H2O2投加量、pH值、浊度、常见有机酸与常规无机盐对LFGR破络特性的影响。结合H2O2消耗观测、自由基淬灭实验、自由基信号检测与降解产物分析等科学识别LFGR体系中主要活性氧物种,并进一步剖析Ni-EDTA的破络过程与主导机制。定量比较分析LFGR与其他UV活化氧化技术去除多种重金属EDTA络合物(M-EDTA)的特性,并进一步阐明LFGR的运行成本优势。对于络合物浓度为1.0 mmol/L的近中性模拟废水,LFGR的优化反应条件为:Fe(Ⅲ)投加量为0.1 mmol/L,H2O2投加量为50 mmol/L,UV光照时间为20 min。该条件下,EDTA可完全转化,且经碱沉淀后Ni(Ⅱ)去除率可高达99.40%;LFGR对水中常见有机酸与常规无机盐呈现出良好的抗干扰性;H_(2)O_(2)主要通过与配体-金属电子转移产生的Fe(Ⅱ)发生类芬顿反应消耗;LFGR的主要作用过程是Fe(Ⅲ)置换Ni(Ⅱ)并激发配体-金属电子转移反应从而促进EDTA光解,UV进一步驱动Fe(Ⅲ)还原并加快Fe物种循环,进而强化类芬顿技术活性氧自由基(主要为·OH和·O_(2)^(-))的催化作用。LFGR可在近中性条件下实现多种M-EDTA的良好破络效果,水处理费用合计为4.21元/t,具有良好技术经济性。 展开更多
关键词 络合物 破络 配体-金属电子转移 类芬顿 近中性废水
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吸附法去除水中典型有机络合态重金属的研究进展
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作者 张伟 罗旭彪 +2 位作者 欧阳婷 柳正葳 熊萍 《工业水处理》 CAS CSCD 北大核心 2024年第6期60-68,共9页
工业废水中低浓度、难降解、高毒性有机络合态重金属的有效去除是当前重金属污染治理领域的热点问题。吸附法因成本低、效率高、操作简便等优点在有机络合态重金属污染治理领域备受关注。首先详细阐述了近年来主流吸附剂的发展现状及其... 工业废水中低浓度、难降解、高毒性有机络合态重金属的有效去除是当前重金属污染治理领域的热点问题。吸附法因成本低、效率高、操作简便等优点在有机络合态重金属污染治理领域备受关注。首先详细阐述了近年来主流吸附剂的发展现状及其在去除水体中典型EDTA络合态重金属方面的研究进展,评述了不同类别吸附剂的优缺点及相应的性能优化方法,并归纳了相关吸附剂的反应机理。之后将传统有机络合态重金属污染治理技术与当下新型吸附技术各自的优点和局限性进行了对比,为在复杂环境中合理选择最佳类型吸附剂提供了有益参考,并列举了新型吸附剂在含有机络合态重金属污染实际废水治理领域的应用表现和发展潜力。最后展望了未来新型吸附剂的研究重点和发展方向,以期为吸附法治理含有机络合态重金属废水的研究提供参考。 展开更多
关键词 工业废水 EDTA络合态重金属 吸附剂 反应机理
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Efficient removal of Cr(Ⅲ)-carboxyl complex from neutral and high-salinity wastewater by nitrogen doped biomass-based composites 被引量:3
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作者 Li Song Shichao Jing +2 位作者 Yixing Qiu Fuqiang Liu Aimin Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第1期397-402,共6页
Heavy metals usually exist stably as the species of organic complexes in high-salinity wastewater.Therefore,their effective removal is challenging,especially when the initial p H is neutral.Herein,a novel nitrogen dop... Heavy metals usually exist stably as the species of organic complexes in high-salinity wastewater.Therefore,their effective removal is challenging,especially when the initial p H is neutral.Herein,a novel nitrogen doped biomass-based composite(N-CMCS)was synthesized to remove the complexed heavy metal of Cr(Ⅲ)-carboxyl.The maximum adsorption capacity of Cr(Ⅲ)-Citrate(Cr-Cit)by N-CMCS under neutral p H(7.0)and high-salinity(200 mmol/L NaCl)condition was up to 2.50 mmol/g.And the removal performance remained stable after 6 times of regeneration.Combined with species and characterizations analysis,electrostatic attraction and hydrogen bonding were the main mechanisms for N-CMCS to remove Cr(Ⅲ)-carboxyl complexes.Dynamic adsorption indicated N-CMCS column could treat about 1300BV simulated wastewater and 350 BV actual wastewater with the concentration of effluent lower than1.0 mg/L.Furthermore,N-CMCS could remove a variety of complexed heavy metal ions under neutral p H,indicating the great potential in practical application. 展开更多
关键词 Biomass-based Nitrogen doping Adsorption complexed heavy metals High-salinity wastewater
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Mass Transfer-Promoted Fe^(2+)/Fe^(3+)Circulation Steered by 3D Flow-Through Co-Catalyst System Toward Sustainable Advanced Oxidation Processes
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作者 Weiyang Lv Hao Li +6 位作者 Jinhui Wang Lixin Wang Zenglong Wu Yuge Wang Wenkai Song Wenkai Cheng Yuyuan Yao 《Engineering》 SCIE EI CAS CSCD 2024年第5期264-275,共12页
Realizing fast and continuous generation of reactive oxygen species(ROSs)via iron-based advanced oxidation processes(AOPs)is significant in the environmental and biological fields.However,current AOPs assisted by co-c... Realizing fast and continuous generation of reactive oxygen species(ROSs)via iron-based advanced oxidation processes(AOPs)is significant in the environmental and biological fields.However,current AOPs assisted by co-catalysts still suffer from the poor mass/electron transfer and non-durable promotion effect,giving rise to the sluggish Fe^(2+)/Fe^(3+)cycle and low dynamic concentration of Fe^(2+)for ROS production.Herein,we present a three-dimensional(3D)macroscale co-catalyst functionalized with molybdenum disulfide(MoS_(2))to achieve ultra-efficient Fe^(2+)regeneration(equilibrium Fe^(2+)ratio of 82.4%)and remarkable stability(more than 20 cycles)via a circulating flow-through process.Unlike the conventional batch-type reactor,experiments and computational fluid dynamics simulations demonstrate that the optimal utilization of the 3D active area under the flow-through mode,initiated by the convectionenhanced mass/charge transfer for Fe^(2+)reduction and then strengthened by MoS_(2)-induced flow rotation for sufficient reactant mixing,is crucial for oxidant activation and subsequent ROS generation.Strikingly,the flow-through co-catalytic system with superwetting capabilities can even tackle the intricate oily wastewater stabilized by different surfactants without the loss of pollutant degradation efficiency.Our findings highlight an innovative co-catalyst system design to expand the applicability of AOPs based technology,especially in large-scale complex wastewater treatment. 展开更多
关键词 Advanced oxidation processes 3D co-catalyst Flow-through mode Enhanced mass transfer complex wastewater treatment
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基于四氰合镍(Ⅱ)配合物的紫外吸收快速测定废水中氰化物
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作者 杨丁 李晓惠 李迎新 《辽宁科技学院学报》 2024年第1期24-27,共4页
基于四氰合镍(Ⅱ)配合物在267.6 nm、285.4 nm、309.0 nm有特征吸收的特性,建立了紫外光度法快速测定废水中氰化物的新方法。当底液中氢氧化钠、硫酸镍、氨浓度分别为0.04 g/L、1.0 mmol/L、0.8 mol/L时,氰化物(CN-)与二价镍快速反应生... 基于四氰合镍(Ⅱ)配合物在267.6 nm、285.4 nm、309.0 nm有特征吸收的特性,建立了紫外光度法快速测定废水中氰化物的新方法。当底液中氢氧化钠、硫酸镍、氨浓度分别为0.04 g/L、1.0 mmol/L、0.8 mol/L时,氰化物(CN-)与二价镍快速反应生成四氰合镍(Ⅱ)配合物,A_(267.6)、A_(285.4)、A_(309.0)分别与0.16 mg/L~6 mg/L、0.46 mg/L~15 mg/L、2.7 mg/L~80 mg/L的氰化物呈现良好的线性关系(R>0.999),且三个线性范围相互重叠,因此可采用紫外光度法快速测定0.16 mg/L~80 mg/L的氰化物,检出限为0.05 mg/L。该方法能与标准方法(HJ 484-2009)中的预蒸馏程序直接对接,用于焦化废水、黄金冶炼废水中氰化物的测定,回收率在95.2%~103.3%之间,相对标准偏差小于2.6%。 展开更多
关键词 紫外光度法 四氰合镍(Ⅱ)配合物 废水 氰化物 测定
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SBR污水处理技术应对复杂来水运行研究
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作者 杨光东 王小英 贺旺盛 《环境科学与管理》 CAS 2024年第2期81-85,共5页
陕西某煤化工企业污水处理厂利用批序式活性污泥法(SBR)作为污水处理主工艺,主要处理在生产运行期间会产生大量火炬富氢凝液、渣场渗滤液、浓盐水等复杂废水,以及厂区产生的生活污水。为解决各类复杂废水,在原工艺运行的基础上,通过对... 陕西某煤化工企业污水处理厂利用批序式活性污泥法(SBR)作为污水处理主工艺,主要处理在生产运行期间会产生大量火炬富氢凝液、渣场渗滤液、浓盐水等复杂废水,以及厂区产生的生活污水。为解决各类复杂废水,在原工艺运行的基础上,通过对复杂来水的有效均质,控制SBR生化系统营养比例、调节不同种类污水进水量等方法优化运行,实现对各类复杂废水的有效处理以及废水零排放,结果显示,SBR工艺可以将化学需氧量(COD)位800 mg/L左右,氨氮为100 mg/L左右的污水降低到60 mg/L和15 mg/L以下。从而降低了公司危废处理和运行成本费用。 展开更多
关键词 SBR 复杂废水 零排放 煤化工废水
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不同两性复配修饰半碳化纤维对Pb^(2+)的吸附差异
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作者 郭梦婷 王尹菲 +2 位作者 李文斌 邓红艳 阳红 《环境监测管理与技术》 CSCD 北大核心 2024年第3期59-62,共4页
以聚丙烯腈为原料制备半碳化纤维(SCF),经化学和生物两性修饰后,再以海藻酸钠进行复配修饰,得到不同的两性复配修饰SCF,通过试验考察其对Pb^(2+)的等温吸附和动力学特征,分析pH值、温度和离子强度对Pb^(2+)吸附的影响。结果表明:供试材... 以聚丙烯腈为原料制备半碳化纤维(SCF),经化学和生物两性修饰后,再以海藻酸钠进行复配修饰,得到不同的两性复配修饰SCF,通过试验考察其对Pb^(2+)的等温吸附和动力学特征,分析pH值、温度和离子强度对Pb^(2+)吸附的影响。结果表明:供试材料对Pb^(2+)的吸附等温线符合Langmuir和Freundlich模型,最大吸附量(q_(m))为495.09 mmol/kg~770.56 mmol/kg,两性和两性复配修饰后的SCF对Pb^(2+)的吸附量提高了1.8%~55.6%。pH值升高有利于各供试材料对Pb^(2+)的吸附,离子强度在0.01 mol/L~0.5 mol/L范围内,各供试材料对Pb^(2+)的吸附量呈现先增加后减小的趋势,并在0.1 mol/L时达到最大。热力学参数表明,Pb^(2+)吸附是一个自发、吸热和熵增的过程。 展开更多
关键词 半碳化纤维 两性复配修饰 Pb 2+ 吸附 废水处理
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沉淀—氧化—氨基酸改性聚硅氧烷-聚合硫酸铝铁增强混凝组合工艺处理冶炼烟气制酸废水研究及工业试验
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作者 杨鑫然 廖俊杰 +3 位作者 陈俊颖 汪志伟 张启建 曾小君 《环境污染与防治》 CAS CSCD 北大核心 2024年第8期1164-1168,1225,共6页
以钾明矾、硫酸亚铁、双氧水和氨基酸改性聚硅氧烷(MPS)为主要原料,采用超声辅助法制备复合混凝剂——氨基酸改性聚硅氧烷-聚合硫酸铝铁(MPSPAFS),研究了MPSPAFS中MPS质量分数和MPSPAFS投加量对冶炼烟气制酸废水处理效果的影响。同时,... 以钾明矾、硫酸亚铁、双氧水和氨基酸改性聚硅氧烷(MPS)为主要原料,采用超声辅助法制备复合混凝剂——氨基酸改性聚硅氧烷-聚合硫酸铝铁(MPSPAFS),研究了MPSPAFS中MPS质量分数和MPSPAFS投加量对冶炼烟气制酸废水处理效果的影响。同时,针对某铅锌冶炼厂冶炼烟气制酸废水深度处理的需求,采用沉淀—氧化—MPSPAFS增强混凝组合工艺技术开展了冶炼烟气制酸废水处理工业试验。结果表明,在MPSPAFS中MPS最佳质量分数(0.3%)、MPSPAFS最佳投加量(80 mg/L)下,对冶炼烟气制酸废水中COD、SS、Cd、Pb、Zn、Ni、Cu、Hg、Cr和As的去除率分别为80.3%、95.1%、88.9%、86.4%、84.7%、83.3%、82.1%、79.5%、38.2%和36.4%。工业试验运行结果表明,系统出水各项指标均达到《铅、锌工业污染物排放标准》(GB 25466—2010)的标准。 展开更多
关键词 复合混凝剂 冶炼烟气制酸废水 沉淀 氧化 增强混凝
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蛋白-多糖-Cr(Ⅲ)络合物的形成及其脱铬机制
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作者 马宏瑞 杜佳怡 +2 位作者 党靖雯 郝永永 朱超 《皮革科学与工程》 CAS 北大核心 2024年第6期1-8,共8页
选取海藻酸钠(SA)、牛血清白蛋白(BSA)模拟制革废水处理过程中的多糖和蛋白,探讨了多糖、蛋白与Cr(Ⅲ)形成的不同络合物的特性及其稳定性。研究发现,SA和BSA与Cr(Ⅲ)结合后,所形成的络合物相对分子质量明显小于单独的配体,且主要通过配... 选取海藻酸钠(SA)、牛血清白蛋白(BSA)模拟制革废水处理过程中的多糖和蛋白,探讨了多糖、蛋白与Cr(Ⅲ)形成的不同络合物的特性及其稳定性。研究发现,SA和BSA与Cr(Ⅲ)结合后,所形成的络合物相对分子质量明显小于单独的配体,且主要通过配体分子内配位形成Cr(Ⅲ)络合物,络合物的零电荷点向pH中性偏移,增加了中和沉淀、絮凝沉淀的效果,但总铬去除率最高为85.62%。通过超声预处理与重捕剂协同絮凝剂的作用,络合物铬去除率可提高至98%以上,且不受pH的影响。此研究结果为非中性条件下铬的深度去除提供了理论和实践依据。 展开更多
关键词 制革废水 Cr(Ⅲ)络合物 絮凝沉淀 超声预处理 海藻酸钠 牛血清白蛋白
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基于复杂系统管理思维的污水处理厂洪灾恢复案例分析
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作者 李红博 李鹏 +5 位作者 张强 姚亮 张赛 杨喆程 李刚 张海龙 《净水技术》 CAS 2024年第S01期128-134,共7页
针对污水处理厂洪灾恢复具有超越常规工程建设的复杂性特点,提出了基于复杂系统管理思维的分析方法。以河北省污水处理厂灾后恢复为例,从工程复杂性和系统复杂性两方面进行分析,利用关联切割方法和目标适用性思维对问题进行难度降解,将... 针对污水处理厂洪灾恢复具有超越常规工程建设的复杂性特点,提出了基于复杂系统管理思维的分析方法。以河北省污水处理厂灾后恢复为例,从工程复杂性和系统复杂性两方面进行分析,利用关联切割方法和目标适用性思维对问题进行难度降解,将灾后恢复工程分为功能性恢复和现常态化运营两个阶段,对各要素关联相对薄弱处进行切割来降低和分解该工程的固有复杂性,并按预期实现了该污水处理厂通水和达标目标。文章基于复杂系统管理思维形成的复杂工程分析方法可为类似工程提供借鉴和参考。 展开更多
关键词 复杂系统管理 污水处理厂 洪灾恢复 MBR系统 调试及运行
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