活性污泥-浸没式超滤-反渗透在针织印染废水回用处理中的应用

采用活性污泥-气浮+浸没式超滤-反渗透工艺处理针织印染废水,发现二级处理段CODCr、氨氮、总磷去除率分别达到90%、74%、89%,色度、pH值达接管要求,优于一期出水水质。深度处理段,超滤出水达到一般回用水要求,回用产水池水质完全达到针织印染各生产工艺要求。回用水处理成本低于新鲜水与废水处理费用之和,节省了水资源,提升了水重复利用率。     

Synthesis of CuS and PbS nanocrystals on the basis of PE/NBR polymer/elastomeric composites for their applications

In this research work, we have presented a chemical method to elaborate the PbS, CuS nanocrystals embedded in a polymer composites matrix. We have used polyethylene and nitrile butadiene rubber PE/NBR as a support for synthesis of lead sulfide (PbS) and copper sulfide (CuS) nanocrystals. The size control and morphology of these (PbS and CuS) nanoparticles have been applied by the method of “layer by layer”. The obtained nanoparticles were characterized by X-ray diffraction (XRD), UV–Vis and Atomic Force Microscopy (AFM). UV–Vis spectroscopy was used to determine simple optical responses, getting the biggest transmittances of CuS and PbS nanoparticles. Measured size of CuS nanoparticles is approximately 5.5–90 nm in different dose. X-ray diffraction (XRD) study confirmed the formation of cubic phase of PbS nanocrystals into the composite matrix. The size of PbS was estimated ∼9 nm. The surface morphology and crystallite sizes were determined by Atomic Force Microscopy measurements.     

Phenol hydrogenation to cyclohexanone over palladium nanoparticles loaded on charming activated carbon adjusted by facile heat treatment

Selective phenol hydrogenation is a green approach to produce cyclohexanone. It still remains a big challenge to prepare efficient supports of the catalysts for the phenol hydrogenation via a simple and cost-effective approach. Herein, a facile approach was developed, i.e., direct calcination of activated carbon (AC) under argon at high temperature, to improve its structure and surface properties. The modified AC materials were supported with Pd nanoparticles (NPs) to fabricate the Pd/C catalysts. The as-prepared Pd/C600 catalyst exhibits superior catalytic performance in the phenol hydrogenation, and its turnover frequency (TOF) value is 199.2 h^-1, 1.31 times to that of Pd/C-raw. The Pd/C600 catalyst presents both better hydrophobicity and more structural defects, contributing to the improved dispersibility in the reaction solution (phenol-cyclohexane), the better Pd dispersion and the smaller Pd size, which result in the enhancement of the catalytic performance. Furthermore, the as-prepared Pd/C600 catalyst shows a good recyclability.     

十二生肖文创产品设计研究

目的 对十二生肖的文化创意产品进行探索性设计与研究,旨在传承生肖文化,让十二生肖“活”在当下日常生活中。方法 通过市场调研收集十二生肖文创产品信息,从设计手法和功能角度分析归纳当前十二生肖文创现状,发现十二生肖文创产品具有广阔的开发空间,从“内生”、“外引”两个方向对十二生肖主题的文化创意产品进行探索与实践,“内生”指将十二生肖元素融入传统器物;“外引”指从国外优秀案例中汲取营养。结论 通过“内生”的方法,唤醒中华生肖文化的原生动力,为传统器物赋予新时代文化语意,让传统文化得以继承发展;在全球化模式下,通过“外引”的方法,融合吸收他国的优秀案例,让十二生肖文化具有国际化视觉语言,延续生肖文化的海外传承之路。     

凹凸棒土杂化粒子改性聚乙烯醇/壳聚糖复合膜的结构与性能研究

采用表面引发接枝聚合法制备凹凸棒土接枝聚丙烯酰胺杂化粒子(ATP-g-PAAm),以此改性聚乙烯醇/壳聚糖复合膜(PVA/CS)。采用傅里叶红外光谱(FTIR)、差示扫描量热(DSC)、热失重分析(TG)等对三元复合膜(PVA/CS/ATP-g-PAAm)进行了表征,考察了杂化粒子含量对复合膜力学性能、热性能、吸湿率和吸附性能的影响。结果表明,ATP-g-PAAm的加入提高了复合膜的力学性能、结晶度和热稳定性,且能显著提升复合膜对Cu~(2+)的吸附能力。当杂化粒子质量分数为4%时,复合膜的拉伸强度、弹性模量和断裂伸长率分别为62.4 MPa、184.5 MPa和141.3%,对Cu~(2+)的吸附量高达156.5 mg/g。     

基于GOx/NiO@Au-Pt-PGA/GCE酶传感器检测葡萄糖的研究

目的 构建了GOx/NiO@Au-Pt-PGA/GCE传感器对果蔬中的葡萄糖进行快速定量分析。方法 在氧化镍纳米材料(Nickel oxide nanomaterials, NiO)的基础上复合金-铂纳米复合材料(Gold-platinum nanocomposites, Au-Pt)合成了新型的NiO@Au-Pt纳米复合材料,以玻碳电极(Glassy carbon electrode, GCE)为工作电极,聚谷氨酸(Poly-(γ-glutamic acid), PGA)为交联剂,交联葡糖糖氧化酶(Glucose oxidase, GOx)和NiO@Au-Pt制备了GOx/NiO@Au-Pt-PGA/GCE传感器。通过对交联剂浓度、静置时间等的优化确定检测体系最佳工作条件。结果 研究发现,NiO@Au-Pt具有良好的导电性和催化作用,PGA具有良好的生物相容性和协同作用,GOx/NiO@Au-Pt-PGA/GCE能有效提高传感器的灵敏度,增强电流响应。GOx/NiO@Au-Pt-PGA/GCE的最佳工作条件为1.0%的PGA作为制备传感器的交联剂,静置时间20 s。在最佳条件下,葡萄糖浓度与其峰电流在0.01~9.0 mmol/L内呈线性关系,Y=4.1858X+0.169,R2=0.9946,检出限(S/N=3)为2.43 μmol/L。GOx/NiO@Au-Pt-PGA/GCE对梨汁中葡萄糖检测结果与国标规定的高效液相色谱法一致,RSD为3.72%,且GOx/NiO@Au-Pt-PGA/GCE稳定性较好,4 ℃保存15 d后其峰电流仅降低了4.89%,对常见的共存干扰物有较好的抗干扰能力。结论 GOx/NiO@Au-Pt-PGA/GCE简单便捷、稳定性好,可用于果蔬中葡萄糖的快速分析。     

融合位置注意力机制与轻量化STDC网络的非结构化场景语义分割

近年来,非结构化道路分割已成为计算机视觉领域的重要研究方向之一.现有的大多数方法适合结构化道路的分割并无法满足非结构化道路分割的准确性与实时性需求.为了解决上述问题,本文对STDC网络进行改进,引入残差连接来更好地融合多尺度语义信息,还提出一种嵌入位置注意力模块的空洞空间卷积池化金字塔(PAASPP)来增强网络对道路等特定区域的位置感知能力.本文在RUGD与RELLIS-3D两个数据集上进行实验,所提出方法的MIoU在两个数据集的测试集上分别达到了50.78%和49.96%.     

矿用精密水过滤器的实验研究

通过对所研制的矿用精密水过滤器实验台进行过滤实验,研究絮凝剂和助凝剂投加量对原水浊度的去除效果。对比分析纤维球滤料、彗星式纤维滤料以及新型彗星式纤维滤料的过滤效果,同时研究过滤器运行压力、过滤速度对出水水质的影响特性,讨论进水浊度及滤层高度对压力损失的影响规律。结果表明:絮凝剂和助凝剂的投加量分别为5、1 mg/L时絮凝效果最好,原水浊度去除率最高;新型彗星式纤维过滤材料过滤效果最佳;过滤器在压力为0.2~0.6 MPa、滤速为38 m/h时滤床形成较快、出水水质稳定且浊度小于1 NTU;进水浊度增大时,滤床压力损失随时间的增长而加快,导致过滤周期变短;压力损失随滤层高度的增加而减小。实验所得参数为矿用水处理设备的研制和技术推广提供了依据。     

Chemical Vapor Deposition Based Superelastic and Superhydrophoboic Thermoplastic Polymeric Nanofibrous Aerogels for Water Purification

Journal of Inorganic and Organometallic Polymers and Materials - Developing high-performance, low-cost and large-scale absorbent materials is crucial for the treatment of water pollution caused by...