樟脑模拟废水好氧降解动力学的初步研究

利用三株樟脑好氧高效降解菌对樟脑模拟废水进行生物降解，COD降解率，30℃下为75．3％，25℃下为77.62％，并对其好氧生物降解动力学进行了初步研究，确定了该反应符合一级反应动力学模型。     

微波催化氧化樟脑废水

在活性炭与Fenton试剂存在下用微波辐射处理多次铁碳微电解处理后的樟脑废水,通过单因素和正交试验,得出了100mL微波处理废水的最佳条件:活性炭为0.6g,H2O2为1.4mL,pH值取4,微波加热时间为15min,辐射功率为350W,可以使樟脑废水的COD值从321.4mg/L降到145.2mg/L。     

固上顶空气相色谱法测定樟脑和萘

本文对固上顶空气相色谱法的理论和测定条件进行了研究。用于樟脑和萘的测定,最小检出量达１０－９ｇ,回收率为９６．０～１０１．３％．本法基体干扰小,操作简便．     

樟脑废水高效优势降解菌的选育及降解效果

针对樟脑废水，从活性污泥中筛选出降解樟脑废水的高效优势菌，通过分离纯化，优选出三株适应能力强、生长旺盛的菌株，分别为ZH-1，ZH-2、TZH-2。经初步鉴定分别为动胶菌属、假单胞菌属、短杆菌属。试验测定了单株菌和混合菌对樟脑废水的降解效果，结果表明，混合菌的降解效果最为明显，降解率为75．23％。     

毛细管柱气相色谱法测定环境空气中的樟脑

采用毛细管柱气相色谱氢火焰离子化检测器测定环境空气中的樟脑,选择硅胶为吸附剂,甲醇/丙酮混合溶剂(体积比90∶10)为解析剂.方法在0.544 mg/L～109 mg/L范围内线性良好,检出限为0.06 mg/L,当采样体积为20 L时,最低检出质量浓度为0.003 mg/m3,标准溶液平行测定的RSD≤3.8％,空白...     

樟脑和龙脑等萜类化合物废水处理工艺

采用隔油－混凝－气浮－厌氧－好氧组合工艺处理某化工厂樟脑、龙脑等萜类化合物废水，对处理装置运行的主要影响因素进行了分析研究并对运行难点提出了解决途径。运行结果表明，该工艺对含高浓度硫酸根的萜类化合物生产废水的处理效果很好，出水COD在86mg/L以内，低于广州污水排放标准。     

Levels of polychlorinated biphenyls in 1,4-dichlorobenzene mothballs

Although polychlorinated biphenyls(PCBs) are globally recognized pollutant, an understanding of their resources as by-products in chemical industry is poorly investigated. This paper presents data from a study that was conducted in order to determine the extent of PCBs in 1,4-dichlorobenzene(p-DCB) mothballs. Total PCBs and dioxin-like PCBs were detected in five mothball samples. Total PCB concentrations ranged from 328 ng/g to 1798 ng/g, while the levels of WHO-TEQ were between 0.16 pg/g and 13 pg/g. Mean concentrations of total PCBs and WHO-TEQ in the samples were 724 ng/g and 3.2 pg/g, respectively. The highest level of PCB congeners was that of trichlorinated biphenyls(537 ng/g), which maybe due to the relatively low chlorination in the process of p-DCB production. A mechanism of the formation of PCBs from polychlorinated benzene in the presence of chlorine is also suggested. The results suggested that re-estimation on the risk of p-DCB products, especially the products for daily use such as mothballs, is expected.