A NOVEL CHLORAMINE COMPOUND FOR WATER DISINFECTION1

A new chloramine agent, 3-chloio-4, 4-dimethyl-2-oxazolidinone, has been tested in a laboratory scale water treatment plant as to its efficacy in water disinfection. The agent seems to be equally effective as compared to chlorine gas in this application. The results of preliminary toxicity studies on the agent are very encouraging. The agent has a long shelf life both in water solution and in the solid state. Being a solid, the agent is clearly less hazardous to handle than chlorine gas. The agent appears to inhibit oxidative corrosion of metals as well. The agent is less likely to produce toxic halocarbons (e.g., chloroform) in water than is chlorine gas. Possibly most important from the standpoint of water disinfection, the agent is a “slow release” one for its positive chlorine, which provides prolonged bactericidal activity.     

Basic oxygen furnace sludge to treat industrial arsenic- and sulfate-rich acid mine drainage

Environmental Science and Pollution Research - In this study, four systems (S1, S2, S3, and S4) were evaluated to determine whether basic oxygen furnace sludge (BOFS), mainly composed of Fe (84%,...     

面向中小企业的新型投资

“我想把荒山变成玫瑰田”,严景玉（音）先生充满信心地说到。作为江油市巽牌有机农业有限责任公司的拥有者,从1969年第一次收获大马士革玫瑰开始,严先生就一直梦想着将有机耕作变为他的家乡——四川省的通行耕作方式。从那时起,严先生不仅将退化土地修复为可耕作农田,他还将有机耕作的理念引入中国偏远山区,成为一个创业者。当巽牌开始与国际买家合作时,公司的质量标准和分级方法在整个地区的农业领域中传播。     

Dissolved Oxygen Conditions in Northern Gulf of Mexico Estuaries

Because deficient dissolved oxygen (DO) levels may have severe detrimental effects on estuarine and marine life, DO has been widely used as an indicator of ecological conditions by environmental monitoring programs. The U.S. EPA's Environmental Monitoring and Assessment Program for Estuaries (EMAP-E) monitored DO conditions in the estuaries of the Gulf of Mexico from 1991 to 1994. DO was measured in two ways: 1) instantaneous profiles from the surface to the bottom were taken during the day, and 2) continuous measurements were taken near the bottom at 15 min intervals for at least 12 h. This information was summarized to assess the spatial distribution and severity of DO conditions in these estuaries. Depending on the criteria used to define hypoxia (DO concentrations usually <2 mg L-1 or <5 mg L-1) and the method by which DO is measured, we estimate that between 5.2 and 29.3% of the total estuarine area in the Louisianian Province was affected by low DO conditions.     

Correction to: Basic oxygen furnace sludge to treat industrial arsenic- and sulfate‑rich acid mine drainage

Environmental Science and Pollution Research -