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171.
R. K. Skogerboe 《毒物与环境化学》2013,95(3):209-218
Several analytical techniques offer the capability of simultaneously determining 5–40 elements. Of those techniques available, two are receiving extensive attention for analysis of water samples. Optical emission spectrometry utilizing plasma excitation has now evolved to a status in which 20–40 elements can be simultaneously determined on a routine basis. Instrumentation which relies on ion exchange chromatography separations is available which allows the routine determination of several cationic and/or anionic species. The present discussion will briefly describe each of the above multielement analysis systems, summarize their respective capabilities and limitations with respect to water analysis, and project areas of future development. 相似文献
172.
173.
Gkhan Ekrem Üstün Seval Kutlu Akal Solmaz Akn Birgül 《Resources, Conservation and Recycling》2007,52(2):425-440
Regeneration studies of wastewater effluent from an organized industrial district (OID) for possible reuse in textile industry as process water was investigated. Advanced treatment methods including Fenton process, polyaluminium chloride (PAC) coagulation and ion exchange were applied on OID effluent. In Fenton process removal efficiencies for suspended solids (SS), chemical oxygen demand (COD), SAC436 (spectral absorption coefficient), SAC525 and SAC620 were determined 61%, 36%, 35%, 49% and 67%, respectively. After Fenton process, wastewater samples were coagulated with PAC. Optimum removal efficiencies for SS, COD, Fe ion, SAC436, SAC525 and SAC620 were determined 83%, 18%, 93%, 32%, 36% and 58%, respectively. Ion exchange experiments were conducted on chemically coagulated wastewater samples to improve the quality of wastewater. Optimum dosage of resins was determined. The experiments revealed that 1:1 resin ratio (20 mL H-type resin:20 mL OH-type resin) gave the best removal rates for the parameters considered in this study. Study results indicated that quality of the wastewater was suitable for the process water characteristics of textile industry and unit wastewater treatment cost was determined as 2.54 €/m3. 相似文献
174.
使用青岛普仁公司PIC-10离子色谱仪,测定降水中磷酸根离子,从样品的采集、实验条件选择、标准曲线绘制到方法精密度和准确度等分析,总结了淋洗液最佳流速和配比浓度,归纳了测定磷酸根离子的注意问题。 相似文献
175.
建立了一种离子色谱双通道同时检测矿泉水中阴阳离子的方法。阴离子通道选择摘要SH-Anion-013的阴离子色谱柱,洗脱液为3.6mmol/LNa3CO2,流速0.7mL/min,采用抑制电导的检测模式。阳离子通道选择,SH-Cation-012的阳离子色谱柱,洗脱液为3.0mmol/L甲烷磺酸,流速1.0mL/min,采用直接电导的检测方法。结果表明,待测离子线性范围宽,相关性好(R>0.999)精密度高(RSD≤2.35%)实际样品加标回收率在92.5%~103.8%之间,完全满足检测要求,适用于矿泉水中阴阳离子的检测。 相似文献
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177.
Concentrations of halogens (Cl, Br and I) in 30 Japanese rivers were measured by ion chromatography and inductively coupled plasma mass spectrometry to understand their behavior in the terrestrial environment. Concentrations of Cl, Br and I in each river, obtained at 10 sampling points from the upper stream to the river mouth, tended to increase near the river mouth. The ranges of geometric means of Cl, Br and I in each river were 1.0–19.4 mg l−1, 2.5–67.9 μg l−1, and 0.18–8.34 μg l−1, respectively. To compare halogen behavior, the concentration ratios, Br/Cl and I/Cl, were calculated. The Br/Cl range was (2.3–7.8) × 10−3 (geometric mean: 3.74 × 10−3), and it was nearly constant except for the Yoneshiro river. It was estimated that 60–80% of total Br in the middle to lower parts of this river was the excess Br. The Br chemical form in all the rivers is generally considered to be Br−. The I/Cl ratios had different trends in rivers flowing into the Japan Sea and Pacific Ocean, possibly due to the different geological features in the river catchments. 相似文献
178.
以2021年3月青岛市空气自动站监测数据为依据,借助环境气象激光雷达、气溶胶激光雷达、在线离子色谱仪等技术手段,并利用后向轨迹模式(HYSPLIT)对青岛市一次PM_(2.5)和沙尘混合空气污染过程、气象条件、颗粒物组成以及传输路径等进行了综合分析。结果表明:静小风、湿度大、垂直方向逆温以及高空多次向近地面的污染物输送是第1阶段PM_(2.5)污染的主要原因,NO^(-)_(3)、SO^(2-)_(4)、NH^(+)_(4)浓度分别占水溶性离子浓度总和的51.7%,24.8%,22.4%,三者之和占ρ(PM_(2.5))的52.3%,机动车源、工业源和燃烧源贡献较大,其中尤以机动车源影响最显著;第2阶段各子站颗粒物浓度变化呈现明显的传输特征,PM_(2.5)中Ca^(2+)浓度升至第1阶段的6倍,沙尘源影响显著,污染气团主要来自蒙古国和我国内蒙古,前期由西北地区直接到达青岛,后期是经渤海湾、烟台到达青岛东南海域,最后回流至青岛;冷高压强度较弱导致近地面水平扩散条件不利,ρ(PM_(10))长时间维持在较高水平。 相似文献
179.
180.
单柱离子色谱法同时测定地面水中阴离子 总被引:4,自引:0,他引:4
单柱离子色谱法同时测定地面水中F-、Cl-、NO-2-N、NO-3-N、SO2-4阴离子。以2.5mM苯二甲酸、2.4mM三羟甲胺缓冲液为淋洗液,在pH=4.0,流速为1.5ml/min的条件下,测得各阴离子检出限、线性回归方程及相关系数、方法的精密度和准确度。 相似文献