Alternatives to the use of molecular chlorine, such as chlorine dioxide, result in reductions in the quantities of organochlorines produced, and the degree of chlorine substitution in the organochlorines formed. This, in turn, leads to reduced persistence, reduced potential for bioaccumulation and ...
The characteristics of the effluents were assessed in terms of molecular weight distribution by gel filtration, so that alternatives for the treatment of these effluents can be proposed. The analysis of chlorination and extraction stage effluents with different chlorine dioxide substitution levels and ...
The chemicals used to bleach pulp have been a source of environmental concern, and recently the pulp industry has been using alternatives to chlorine, such as chlorine dioxide, oxygen, ozone and hydrogen peroxide. 用于漂白纸浆的化合物是造成环境问题的一个原因,最近制浆行业已经开始使用氯气的替代品,...
A chlorine free pool? How is that even possible? With one of the many alternatives available to sanitize your pool.
The chemical companies producing the chlorine and saltwater systems want to keep this gravy-train running as long and as smoothly as possible. They’re not about to advise pool companies, pool stores or pool maintenance services about any alternatives. They have too good a thing going!
Residues from plants are interesting alternatives as cellulose sources for several applications. In this work a chlorine-free procedure for the isolation of cellulose from rice husk was shown to be very efficient. The overall process does not produce any toxic effluents. On the basis of the whole...
High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 ...
differentiate the two. For example, natural diamonds contain trace amounts of nitrogen, while lab-grown alternatives do not. There's also the example of color zoning, which appears on both natural and HPHT diamonds, but in the latter's case, it will also show geometric patterns within that ...
Dr John Marshall, of the Pure Water Association, a pressure group which has been campaigning for safer drinking water, said: "It shows we should be paying more attention to the chemicals we put in drinking water and be looking for other alternatives to chlorination. A number of safe, non-...
Tradeoff analysis was developed to assist explicit valuation of bleaching design criteria by identifying ranges of objective valuations for which each alternative in a Pareto set was preferred. Potentially-preferred alternatives could then be identified based on robustness against valuation uncertainty.; ...