水解酸化-好氧法处理油田废水机理研究

采用水解酸化-好氧法对经物化预处理的油田废水进行试验研究.当进水COD为190～220 mg·L^-1时,水解酸化段和好氧段停留时间均为10h的条件下,出水COD为65～75 mg·L^-1,达到GB3550-83第一级Ⅰ类标准.运用GC/MS技术分析油田废水有机污染物在工艺流程中相对组分变化的规律,揭示了水解酸化-好氧法处理油田废水过程中的污染物迁移和降解规律.并运用PCR-DGGE技术,考察不同生物反应器内微生物种群及其分布特征,初步确定水解酸化和好氧反应器内的优势菌种.     

甲烷煤尘耦合爆炸传播特性及伤害研究

为探究煤尘质量浓度对甲烷煤尘耦合爆炸传播特性及伤害距离的影响,自制长15 m的爆炸管道系统,用体积分数为7％甲烷分别与质量浓度为0、50、100和200 g/m3的煤尘进行耦合爆炸试验,并根据质量、动量和能量守恒理论推导出最大压力计算公式.结果 表明:不同质量浓度煤尘与甲烷耦合爆炸时,最大压力均随与爆源距离的增加呈现出...     

沱江流域总磷空间排放特征及影响因素分析

沱江流域总磷(TP)减排对于改善三峡库区乃至长江流域的水体富营养化有着重要的作用.以2017年为基准年,基于沱江流域工业、农业和生活源TP排放数据,分析沱江流域TP空间排放特征及污染源排放贡献率;通过引入入河系数,测算沱江流域TP入河量,分析TP的代谢路径;利用Pearson相关分析和线性回归分析,揭示TP排放主要影响...     

Flocculation performance of epichlorohydrin-dimethylamine polyamine in treating dyeing wastewater

Epichlorohydrin-dimethylamine polymers with different intrinsic viscosity (η) and cationicity (τ) were synthesized. The flocculation performance and mechanism of these polymers in the removal of the reactive and disperse dyes from synthetic wastewater was investigated in terms of flocculation dynamics and color removal efficiency. The polymer flocculation efficiency was compared with that of polyaluminum chloride (PAC) and a composite flocculant based on polyaluminum chloride-epichlorohydrin-dimethylamine polyamine. The results showed that epichlorohydrin-dimethylamine polymer was effective over a pH range of 2–10 for the reactive and disperse dye removal (Reactive Brilliant Red and Disperse Yellow dyes). Epichlorohydrin-dimethylamine polymer with the highest η and τ gave the best reactive dye removal efficiency, and its adsorption-bridging and electric neutralization ability played important roles in the flocculation process. The higher the η viscosity of the epichlorohydrin-dimethylamine polymer, the better the flocculation performance of epichlorohydrin-dimethylamine polyamine, and stronger adsorption-bridging ability was obtained for removing the disperse dye from dyeing wastewaters. Epichlorohydrin-dimethylamine polymer achieved better decolorization performance when used together with PAC.     

废催化剂中金属的回收

简述了含有铂、钒、镍金属组分的废催化剂来源及金属回收工艺，介绍了萃取法在金属回收中的应用。     

采空区火源位置探测技术现状及发展方向

概述了国内外采空区火源位置探测技术的现状,着重介绍了温度探测法、气体探测法、磁力探测法、数理解算法、电磁波探测法及电阻探测法等探测技术,并展望了国内外采空区火源位置探测技术的发展方向     

人类工效型背具的研究

从人类工效学和劳动生理学角度,对背具的肩带宽度、内背架设置等进行了实验研究和实用效果评价。对背具的设计原则和生物力学配置提出了建议和改进方法     

Heavy Metal Contents and Magnetic Properties of Playground Dust in Hong Kong

This study examined the levels of seven heavy metals (namelyzinc, copper, cadmium, chromium, lead, manganese and iron) andtheir associations with magnetic properties in playground dustof Hong Kong. Results showed that the playground dust containedhigh concentrations of Zn (mean = 1883 g g^-1), Cu(mean = 143 g g^-1) and Cr (mean = 263 g g^-1).Qualitative examination of dust samples under microscope indicated local traffic as one of the important pollutant sources. Magnetic measurements indicated that these anthropogenicpollutants mainly consisted of coarse-grained multidomain (MD) ferrimagnetic minerals. Superparamagnetic (SP), stable single domain (SSD) ferrimagnetic grains and non-ferrimagnetic mineralswere present in relatively small amounts. Significant correlations between heavy metals and various magnetic parametersindicated a strong affinity of heavy metals to magnetic minerals hence pointed out the potential of magnetic properties for simpleand rapid proxy indications of heavy metal pollution in playground dust.     

室内空气中TVOC的分析测试技术

综述了国内外室内空气中TVOC的分析测试技术：比色管检测法，便携式TVOC仪检测法气相色谱或色质联用分析方法，介绍了我国TVOC标准物质／样品的研制与应用情况。