Biosorption Equilibrium and Kinetics of Au（Ⅲ） and Cu（Ⅱ） on Magnetotactic Bacteria

Magnetotactic bacteria （MTB） as biosorbents for the adsorption of Au（Ⅲ） and Cu（Ⅱ） ions from aqueous solution have been investigated. The optimum adsorption conditions for both metal ions were the initial pH scope of 1-5.5 for Au（Ⅲ） and 2.0-4.5 for Cu（Ⅱ）, room temperature, biomass concentration of 10.0g.L^-1 and sorotion du-ration more than 10 min. When the initial metal concentration were within 500mg.L^-1, the maximum biosorption capacity of 1.0g of MTB （dry mass basis） for Au（Ⅲ） and Cu（Ⅱ） were calculated as 505.2mg of Au（Ⅲ） and 493.1mg of.Cu（Ⅱ） by Langmuir model in single system, respectively. The isotherm equilibrium of Au（Ⅲ） and Cu（Ⅱ） ions in the Au-Cu binary system reflected a unique phenomenon that the adsorption of Au（Ⅲ） was rein-forced and that of Cu（Ⅱ） prohibited, compared respectively-with their performances in the single metal system.When the,concentration of-Au（Ⅲ） and Cu（Ⅱ）. were below 80mg.L^-1, the waste waterafter MTB treating, wasbelow 1.0mg.L^-1, which is in conformity with Environmental Performance Standards （EPS） of Canada. Besides, all the kinetic data were fitted well to the pseudo second-order kinetic model with a high correlation coefficient （R^2〉0.999）.     

耐低温对硝基苯酚降解菌的降解动力学研究

以对硝基苯酚在10℃条件下的微生物降解过程为研究对象,融合单因素实验、细胞疏水性实验、细胞膜通透性实验与降解动力学实验探究菌株Pseudomonas sp. ZL对对硝基苯酚的低温降解特性。实验结果表明,在10℃条件下菌株Pseudomonas sp. ZL能够耐受并降解303.71 mg·L^-1的对硝基苯酚,最佳降解条件为pH=8.0,0.5% NaCl,1 g·L^-1 NH₄NO₃,该条件能够显著促进对硝基苯酚的降解速率并大大缩短降解的延迟时间。在10℃、单因素最佳条件下,对硝基苯酚降解菌的抑制降解动力学拟合符合Aiba模型,其中μ_max（最大比生长速率）为0.205 h^-1,K_s（半饱和系数）为3.40 mg·L^-1,K_i（底物抑制系数）为166.86 mg·L^-1,因此166.86 mg·L^-1即为该条件下菌株的低温降解抑制浓度。与其他降解菌株相比,菌株Pseudomonas sp. ZL的K_i和μ_max/K_s较大、K_s/K_i值较小,说明对硝基苯酚对该菌株的抑制作用较小,菌株的有效利用率更高,在原位修复低温地下水及土壤污染方面具有较高的应用潜力。     

Fe3+在A2O工艺缺氧区的转化规律及其对污泥絮凝性的影响

为了研究铁元素对A²O工艺污泥絮凝性的影响,考察Fe³⁺在污泥上清液、胞外聚合物（extracellular polymeric substances,EPS）与底泥（Pellet）中的分布和迁移转化规律,结合三维荧光光谱（3D-EEM）、原子吸收和X射线衍射仪（XRD）分析Fe的存在形态和结构特征,揭示Fe³⁺与微生物代谢产物的作用机制,探索Fe³⁺对脱氮除磷效率的影响。结果表明：低浓度Fe³⁺（<10 mg·L^-1）能够提高COD和TN去除率,促进微生物活性,增强污泥生物絮凝性;高浓度Fe³⁺（10~40 mg·L^-1）则抑制微生物活性,使EPS总量升高,污泥絮体脱稳,LB、TB层PN/PS是影响污泥絮凝性的关键因素;Fe³⁺的投加强化生物除磷效率,当Fe³⁺浓度为40 mg·L^-1时,TP去除率为93%。Fe³⁺在污泥混合液中的分布规律为TB>上清液>LB>SMP,Fe³⁺在生物体内富集累积,能够改变EPS各层的组分。     

The adsorption of coumarin at solid metal electrodes

The effect of coumarin on the “deposition potential” of a number of metals at solid metal surfaces has been compared with that at a dropping mercury electrode. These results have been used to interpret the adsorption of coumarin on different metal surfaces and to suggest that Tl⁺ and Pb²⁺ ions are specifically adsorbed on mercury and that Tl⁺, Co²⁺, Fe²⁺, Ni²⁺ and Zn²⁺ are specifically adsorbed on their parent metals.     

Removal of Rhodamine B from aqueous solutions and wastewater by walnut shells: kinetics,equilibrium and thermodynamics studies

An adsorption study of Rhodamine B (RB) dye from aqueous solutions was carried out using walnut shells pretreated by different methods. In addition to the effects of the pretreatment, the effects of various parameters like pH, adsorbent dose, contact time, initial dye concentration and temperature on the adsorption of RB was studied. The adsorption process was highly pH dependent and a maximum adsorption was achieved at pH 3.0. The best fit for the rates of dye adsorption was a pseudo-second-order kinetic model with good correlation coefficients (R²>0.99). Langmuir isotherms were used to determine that the maximum loading capacity of the different walnut shells and the RB capacities ranged from 1.451–2.292 mg·g^-1. The dye adsorption was also evaluated thermodynamically. Positive standard enthalpy (?H°) values were obtained indicating that the RB adsorption process is endothermic as well as ?G° and ?S° values showed that adsorption process is spontaneous with an increased randomness at the solid-liquid interface. Desorption studies were carried out to explore the feasibility of regenerating the used walnut shells and it was found that 97.71%–99.17% of the retained RB was recovered with 0.1 mol?L^-1 NaOH solution. The walnut shells were also successfully used to remove RB from industrial effluents.     

用海藻类生物吸附剂去除废水中的重金属离子——一种经济型新技术

Heavy metal pollution from industrial wastewater is a worldwide environmental issue. Biosorption of heavy metals by using biosorbents derived from various types of biomass has been shown to be effective for the uptake of heavy metal ions. In this study, biosorbents derived from the biomass of a group of marine macroalgae were used for the removal and recovery of heavy metal ions from aqueous solutions. Results indicated that the biosorbents have high uptake capacities and affinities for a number of heavy metal ions. The uptake capacities of the biosorbents were in the range of 1.0 to 1.5mmol·g-1 for divalent heavy metal ions. The kinetics of the uptake process was fast and the process can be used in both batch and fixed-bed operations. It appears that the biosorption process by using biosorbents from marine macroalgae can be an efficient and cost effective technology for the treatment of heavy metal containing wastewater.     

新型还原氧化石墨烯/氮化碳复合纳滤膜制备及其性能

高性能石墨烯基复合膜的制备是目前国际研究热点,但是石墨烯基纳滤膜在脱盐中水通量较低,限制其在脱盐中的应用。采用聚多巴胺(PDA)改性聚砜(PSF)膜为基膜,将还原氧化石墨烯(rGO)和超薄氮化碳(uCN)纳米片通过真空抽滤法在基膜表面自组装制备新型还原氧化石墨烯/氮化碳复合纳滤膜。通过场发射扫描电子显微镜、透射电子显微镜、X 射线衍射仪、傅里叶变换红外光谱仪和X射线光电子能谱仪等研究uCN添加对膜结构和形貌的影响,并考察不同uCN添加比例、rGO用量及压力复合纳滤膜性能变化规律。结果显示当在100 mg·L^-1的rGO中添加uCN为20 mg·L^-1时所制备的rGO/uCN复合纳滤膜不仅保持良好盐离子截留率(对Na₂SO₄截留率85.86%,对NaCl截留率30.17%),且水渗透系数是rGO膜的2.15倍(88.50 L·m^-2·h^-1·MPa^-1)。     

锑离子添加剂对低共熔溶剂(DES)电解液液流电池的性能改善研究

非水系氧化还原液流电池（NARFB）的广泛应用受制于其较低的性能。在电解液中加入一些金属离子添加剂是一种可能的解决方案。实验研究了Sb³⁺离子对低共熔溶剂（DES）电解液液流电池电化学性能的影响。结果表明,添加Sb³⁺离子可以强化V（Ⅲ）/V（Ⅱ）氧化还原离子对的电化学反应动力学（最高可达22.6％）过程,钒离子在DES中的扩散系数提高了63.3％,并且电荷转移电阻降低了11.9％。场发射扫描电子显微镜表明,Sb³⁺离子电沉积在石墨毡的表面,对电化学反应起催化作用,从而改善了电化学性能。考虑增强的动力学和降低的活性比表面积之间的平衡,确定了Sb³⁺的最佳浓度为15 mmol·L^-1。此外,当使用含有Sb³⁺的负极电解液液流电池时,液流电池的功率密度提高了31.2%,从含原始电解质的3.08 mW·cm^-2到含15 mmol·L^-1 Sb³⁺离子的4.04 mW·cm^-2。这些结果为改善NARFB的电池性能提供了一个便捷而有前景的方法。     

利用农业废弃物和诱导剂提高海洋内生拟盘多毛孢菌J63的漆酶产量(英文)

Pestalotiopsis sp. J63, producing a high activity of laccase, is a new marine-derived fungus isolated from the oceanic sediment of the East China Sea. Since the marine environment is oligotrophic nutrient, marine de-rived fungi may use small amount of nutrients to grow and produce laccases. Agricultural residues that are mainly composed of lignin, cellulose and hemicellulose are difficult to be degraded and few microbes can take them as sub-strates, so they are considered as oligotrophic nutrient and have the potential to be used to produce value added products. In this study, the ability of Pestalotiopsis sp. J63 to use agricultural residues to produce laccases was tested in the submerged fermentation. The combination of 3 g·L-1 maltose and 20 g·L-1 rice straw was the best car-bon sources and 8 g·L-1 ammonium sulfate was the best nitrogen source under the condition without inducers. The effects of five inducers, the feeding time and concentration of inducer on laccase production were investigated. Adding 0.09 mmol·L-1 phenol after 24 h of incubation led to high laccase activity （5089 U·L-1）, while with 0.09 mmol·L-1 phenol in the medium and wheat bran as the nitrogen source, the laccase activity could reach 5791.7 U·L-1. Native-PAGE results showed that two laccase isozymes were present in the cultures. One existed in both in-duced and non-induced culture filtrates, while the other was only found in the fermentation with the addition of phenol, guaiacol and veratryl alcohol.     

聚氨酯泡沫固定化Alcaligenes sp.DN25去除苯酚的研究

载体材料是构建固定化体系的基础,其中孔结构直接影响固定化的生物量及降解结果,开展了制备不同孔径聚氨酯泡沫材料并考察其固定化产碱杆菌DN25降解苯酚的研究。结果表明,孔隙结构的聚氨酯泡沫材料在孔径均值为150 μm时所固定的生物量达到最大值（0.0253±0.0010） g,固定化细胞能在48 h内完全降解1160 mg·L^-1苯酚,而游离细胞则完全受到抑制,并且发现载体材料PUF在降解前12 h内吸附苯酚的平衡吸附率为56.1%。进一步研究固定化细胞在初始pH6.0~9.0,NaCl浓度0~4.0%条件下降解900 mg·L^-1苯酚的情况,固定化细胞对苯酚的去除率受pH、NaCl浓度的影响不显著。并且,固定化细胞重复使用11个批次对500 mg·L^-1苯酚的去除率仍能保持100%,反映了PUF-固定化细胞体系对苯酚处理浓度和系统稳定性两方面的强化作用。     

酸性废水体系中硫酸钙反应结晶过程研究(英文)

The present work focused on the recycle of the sulfate and the metal ions from acidic wastewater dis charged by nonferrous metallurgical industry. The effects of the temperature, the reactant concentration, the stirring speed and the metal ions on the reactive crystallization process of calcium sulfate between sulfuric acid and lime were systematically investigated. The morphology of the precipitated crystals evolved from plateletlike and nee dlelike shape to rodlike shape when the temperature was increased from 25 to 70 ℃. An increase in the agglom.     

6种杀菌剂对斑马鱼急性毒性评价及中毒症状观察

采用静态试验法测定了嘧菌酯、醚菌酯、戊菌唑、戊唑醇、氟环唑、氟硅唑6种甲氧基丙烯酸酯类和三唑类杀菌剂对斑马鱼处理96 h后的急性毒性,并观察其中毒症状,评价其对环境的安全性.结果表明,斑马鱼对不同药剂中毒症状表现各异;12.5％氟环唑悬浮剂对斑马鱼的LC50值为13.911 mg/L,为低毒;50％嘧菌酯水分散粒剂、50％醚菌酯水分散粒剂、20％戊菌唑水乳剂、25％戊唑醇水乳剂、20％氟硅睦可湿性粉剂对斑马鱼毒性的LC50值分别为1.746、1.003、3.306、6.405和2.348 mg/L,均为中毒.由此得出结论:12.5％氟环唑悬浮剂在水田施用安全,其他5种药剂在水田及附近应谨慎施用.     

Influence of nitrogen concentration on operation of a novel bio-electrochemical-granular sludge reactor

The performance of nitrogen removal and electricity generation of a novel bio-electrochemical-granular sludge reactor at different influent nitrogen concentration was investigated. The impact mechanism of granular sludge, key enzyme activity, extracellular polymer composition and microbial community distribution were systematically studied. The results showed that COD, NO₃^--N, NO₂^--N and dissolved methane were efficiently removed in stages Ⅰ, Ⅱ, Ⅲ and Ⅳ (Influent NO₃^--N and NO₂^--N concentrations were 60 and 20 mg·L^-1, 100 and 40 mg·L^-1, 140 and 60 mg·L^-1, 180 and 80 mg·L^-1, respectively). The removal efficiency of COD was the highest in stage Ⅳ, and it was above 96%. The effluent concentration of NO₃^--N was the most stable at stage Ⅱ, and the removal efficiency was over 99%. The NO₂^--N removal efficiency was above 99% in each stage. In stage Ⅳ, the maximum power density and output voltage was 471.2 mV·m^-3 and 608.1 mV at the fourth compartment, respectively. The polysaccharide and protein content of LB-EPS was the highest in stage Ⅱ of the fifth compartment, 13.7 mg·g^-1 and 14.7 mg·g^-1, respectively. Coenzyme F₄₂₀ activity was the lowest in the first compartment. The protease activity of the sludge was increased due to the increase of influent nitrogen concentration. From stage Ⅰ to stage Ⅳ, the relative abundance of Protebaoteria was decreased, while the relative abundance of Chloroflexi, Firmicutes and Planctomycetes were increased. Although Thauera with denitrification effect was decreased by 8.64% in the first compartment, the nitrogen removal was still well in the reactor. The relative abundance of Methanothrix was increased to 12.3% in the fourth compartment, indicating that Methanothrix could co-exist with other bacteria in the reactor.     

Single and Multi-Component Adsorption of Metal Ions by Acinetobacter sp. FM4

This paper reports biosorption of Cr(VI), Cu(II), and Ni(II) onto Acinetobacter sp. FM4 biomass isolated from soil irrigated with tannery effluent from single, binary, and ternary metal solutions. Optimum pH for biosorption was found to be 2.0 for Cr(VI), 5.0 for Cu(II), and 6.0 for Ni(II) ions. Sorption capacities for Cr(VI), Cu(II), and Ni(II) ions were estimated as 90 mg g-1, 93.3 mg g-1, and 66.7 mg g-1, respectively. The combined effect of adsorbing one metal ion in the presence of another metal ion reduced the adsorption capacity of either metal ion. The presence of functional groups on the cell wall surface of the biomass that may interact with the metal ion was confirmed by Fourier Transform Infrared (FTIR) spectroscopy.     

超声雾化/表面活性剂强化吸收耦合生物洗涤净化甲苯废气

为提高生物法净化疏水性VOCs的效率,构建了以微米级雾滴结合表面活性剂为特色的超声雾化/表面活性剂耦合生物洗涤器（ultrasonic atomization/surfactants-biological washing reactor,USBWR）。考察了USBWR对甲苯废气的去除能力及停运恢复性能,探讨USBWR最佳工艺条件及雾滴粒径分布,并分析系统中微生物群落结构,对比其与传统生物洗涤器（traditional biological washing reactor,TBWR）净化性能差异。结果表明：USBWR较TBWR系统有较高的甲苯去除能力和去除负荷,更适应企业非连续工况条件;在进气浓度2000 mg·m^-3、雾化量450 ml·h^-1条件下,响应曲面法优化USBWR最佳工艺条件为洗涤液pH 7.07、停留时间54.60 s、液气比0.23,USBWR去除率达97.26%;将实验室前期筛选得到的复配表面活性剂溶液（50 mg·L^-1皂角苷+500 mg·L^-1柠檬酸钠+200 mg·L^-1柠檬酸+50 mg·L^-1氯化钠）应用到超声雾化装置中,雾滴粒径均在15 μm以下,中位径为（6.911±0.326）μm,比表面积为（359.60±50.02）m²·kg^-1,雾滴小而均匀,更有利于气液充分接触;USBWR系统中主要微生物细菌门为变形杆菌门（Proteobacteria）、拟杆菌门（Bacteroidota）和绿弯菌门（Chloroflexi）,与TBWR系统相比,USBWR系统促进了优势菌种变形杆菌门（Proteobacteria）的富集生长,更有利于降解甲苯废气。     

玉米秸秆生物炭对水中铅、镉的去除性能及作用机理研究

以大宗农业废弃物玉米秸秆为原料, 借助高温焙烧制得了玉米秸秆生物炭, 并通过对水中铅镉的吸附实验, 考察了高热解温度生物炭的重金属脱除性能。结果显示: 800 ℃焙烧所得玉米秸秆生物炭以块状及棒状形态为主, 孔径以微孔居多, 灰分中碱金属及碱土金属占比较大; 在25 ℃、pH值4、960 min、Pb²⁺、Cd²⁺初始质量浓度分别为429.24和280.34 mg/L时, 生物炭对Pb²⁺和Cd²⁺最大吸附量分别为94.79和24.47 mg/g; 该去除过程满足准二级动力学方程、Freundlich等温线模型, 在铅镉初始质量浓度均为150 mg/L时, 所得平衡吸附容量可达69.0、24.4 mg/g; 热力学分析显示, 该去除过程为吸热熵增过程; 而共存离子吸附实验显示, 铅离子对镉离子存在明显的拮抗作用。高热解温度玉米秸秆生物炭对水中铅镉的去除过程是物理吸附与化学沉淀共同作用的结果。     

氮浓度对新型生物电化学-颗粒污泥反应器运行的影响

探讨了新型生物电化学-颗粒污泥反应器在不同进水氮浓度下的脱氮效能与产电性能,并从颗粒污泥的关键酶活性、胞外聚合物组分以及微生物群落分布等角度系统研究了其影响机制。结果表明,COD、NO₃^--N、NO₂^--N和溶解性甲烷在第Ⅰ、Ⅱ、Ⅲ、Ⅳ阶段（进水NO₃^--N和NO₂^--N浓度分别为60 mg·L^-1和20 mg·L^-1、100 mg·L^-1和40 mg·L^-1、140 mg·L^-1和60 mg·L^-1、180 mg·L^-1和80 mg·L^-1）均得以有效去除,其中COD去除率在第Ⅳ阶段效果最佳,去除率达96%以上,NO₃^--N出水浓度在第Ⅱ阶段更为稳定,其去除率达99%以上,NO₂^--N去除率在各阶段均达99%以上;该反应器最大的功率密度与输出电压值为第Ⅳ阶段的4号格室,分别为471.2 mV·m^-3和608.1 mV。污泥疏松型胞外聚合物（LB-EPS）中多糖与蛋白含量最高为第Ⅱ阶段的5号格室,分别为13.7 mg·g^-1和14.7 mg·g^-1;1号格室污泥中辅酶F₄₂₀活性最低,进水氮浓度的增大提高了污泥中蛋白酶活性。由第Ⅰ阶段至第Ⅳ阶段,该反应器中变形菌门（Protebaoteria）相对丰度减少,而绿弯菌门（Chloroflexi）、厚壁菌门（Firmicutes）和浮霉菌门（Planctomycetes）相对丰度增加;具有脱氮作用的陶厄氏菌属（Thauera）在1号格室减少了8.64%,但该反应器脱氮效果未受到影响;甲烷丝状菌属（Methanothrix）在4号格室相对丰度增至12.3%,表明产甲烷菌可在该反应器中与其他菌群联营共存。     

超声雾化/表面活性剂强化吸收耦合生物洗涤净化甲苯废气

为提高生物法净化疏水性VOCs的效率,构建了以微米级雾滴结合表面活性剂为特色的超声雾化/表面活性剂耦合生物洗涤器（ultrasonic atomization/surfactants-biological washing reactor,USBWR）。考察了USBWR对甲苯废气的去除能力及停运恢复性能,探讨USBWR最佳工艺条件及雾滴粒径分布,并分析系统中微生物群落结构,对比其与传统生物洗涤器（traditional biological washing reactor,TBWR）净化性能差异。结果表明：USBWR较TBWR系统有较高的甲苯去除能力和去除负荷,更适应企业非连续工况条件;在进气浓度2000 mg·m^-3、雾化量450 ml·h^-1条件下,响应曲面法优化USBWR最佳工艺条件为洗涤液pH 7.07、停留时间54.60 s、液气比0.23,USBWR去除率达97.26%;将实验室前期筛选得到的复配表面活性剂溶液（50 mg·L^-1皂角苷+500 mg·L^-1柠檬酸钠+200 mg·L^-1柠檬酸+50 mg·L^-1氯化钠）应用到超声雾化装置中,雾滴粒径均在15 μm以下,中位径为（6.911±0.326）μm,比表面积为（359.60±50.02）m²·kg^-1,雾滴小而均匀,更有利于气液充分接触;USBWR系统中主要微生物细菌门为变形杆菌门（Proteobacteria）、拟杆菌门（Bacteroidota）和绿弯菌门（Chloroflexi）,与TBWR系统相比,USBWR系统促进了优势菌种变形杆菌门（Proteobacteria）的富集生长,更有利于降解甲苯废气。     

The kinetic analysis of optimization and selective transportation of Cu(Ⅱ) ions with TNOA as carrier by MDLM system

This study covers the transportation of Cu(Ⅱ) ions by multi-dropped liquid membrane(MDLM) system and tri-noctylamine(TNOA) as carrier in kerosene. Batch experiments are held to obtain optimum conditions for the transportation of Cu(Ⅱ) ions such as volume of donor, organic, and acceptor phase 100 ml, p H of donor phase9.00, temperature 298.15 K, concentration of H_2SO_4 in acceptor phase 1.00 mol·L~(-1), concentration of TNOA in organic phase 5.00 × 10~(-3)mol·L~(-1)and rate of peristaltic pump 50 ml·min~(-1). Optimum circumstances of this extraction are as follows: p H of donor phase is 9.00, concentration of TNOA is 5.00 × 10~(-3)mol·L~(-1),1.00 mol·L~(-1)H_2SO_4 as acceptor phase, and flux rate is 50 ml·min~(-1). Cu(Ⅱ) ion transportation is consecutive first order irreversible reaction. Activation energy is found as 5.22 kcal·mol-1(21.82 k J·mol~(-1), this process is called as diffusion controlled system. Selective transportation of Cu(Ⅱ) ions with alkaline, alkaline earth, and different heavy metal ions at optimum conditions of single Cu(Ⅱ) extraction was conducted. According to the selective transportation Cu(Ⅱ) ions with alkaline and alkaline earth metal ions, Na~+, K~+, and Ba~(2+)ions are not detected in the acceptor phase, but 12.00% of Ca~(2+)ions is transported from donor phase to acceptor phase. At the end of the simultaneous extraction of Zn(Ⅱ), Fe(ⅡI), and Mo(VI) with Cu(Ⅱ) ions, 2.20% of Mo(VI), 0.80% of Fe(Ⅲ) and 3.60% of Zn(Ⅱ) are detected in the acceptor phase.     

CuCe氧化物催化剂的制备及CWPO降解双酚A废水研究

为解决Fenton法存在活性组分流失及通常在pH 2～3条件下运行的局限性,采用柠檬酸络合法制备了CuCe氧化物催化剂,建立了双酚A非均相催化湿式过氧化氢氧化（CWPO）反应体系。考察了焙烧温度、Cu/Ce摩尔比、H₂O₂用量、双酚A初始浓度和pH对催化剂物化结构和CWPO性能的影响。并分析了可能的降解路径。结果表明：催化剂具有良好的高温稳定性和pH适应性,在pH 1.6～7.9范围内对双酚A都具有较高的降解性能,不需要调节pH。在焙烧温度450℃、Cu/Ce摩尔比1.0、催化剂用量1 g·L^-1、H₂O₂用量196 mmol·L^-1、BPA浓度152 mg·L^-1、pH 6.6、反应温度75℃、反应95 min后,BPA和TOC去除率分别为91.8%和84.5%,Cu²⁺析出浓度为19.3 mg·L^-1。推测了双酚A可能的降解路径。