THE IMPORTANCE OF SOIL IN EVALUATING POTENTIAL WASTE WATER DISPOSAL SITES IN THE MISSOURI OZARKS1

ABSTRACT: A number of criteria can be used in the selection of an area for the irrigation disposal of secondary treated waste water. The inherent capacity of the surface soil to retain, or at least detain, the various nutrient ions passing through the profile in the percolating waters becomes the prime consideration in regions with shallow water tables or in Karst areas such as the Missouri Ozarks where the risk of ground water supply contamination is high. A comprehensive study of the nutrient renovation potential of several soils was undertaken at a proposed effluent irrigation site along the Ozark National Scenic Riverways in south central Missouri. The surface soil hydrology was evaluated employing selected soil water parameters. Exchange equilibria studies determined the retention capacity for Ca and Mg while the concentrations of other selected ions were analyzed in the soil water to measure their retention time and net removal. The movement of a bromine tracer was monitored as an index of the renovation capacity of these soils for the more mobile anions such as nitrate. Neutron activation analysis proved to be a useful tool in the water quality analyses. All surface soil profiles demonstrated some degree of nutrient renovation for the various nutrients studied.     

WATER POLLUTION AS AFFECTED BY STREET SALTING1

The use of salt to melt ice and snow on streets and roads has become prevalent throughout the Northeast. Several states apply as much as 20 tons per lane-mile. Salt runoff may be sorted in various locations within the hydrologic system. Eventually the salt reaches streams and lakes. In Meadowbrook, it was observed that the chloride content reached a high of 11,000 ppm in December 1969. The runoff from the watershed was emitted in several surges. Chloride concentrations declined with the onset of summer, but still remained high, suggesting that some of the salt applied during the past winter appeared in the summer stream flow. Salt runoff entering a small lake, flowed directly to the lake bottom. The buildup of high density saline water in the lower portion of the lake prevented complete mixing in the spring. Incomplete mixing led to anoxic conditions in the lower lake strata. The population of bent hic fauna of the lake was changed by the flow of salt water into the lake. From a total of 10 species of dipteran larva and oligochaetes, only 4 species of the latter remained.     

构建促进循环经济型服务业发展的保障体系

循环经济是促进可持续发展的重要手段,服务业近年来在我国发展迅速,由此造成的环境问题也日见突出,用循环经济的理念对服务业进行引导显得很有意义。发展循环型经济、建立循环型社会是实施可持续发展战略的重要途径和实现形式。本文剖析了我国在发展循环经济型服务业方面诸多应改进和进行创新的内容,利用循环经济的理论从行政、法律、经济、社会等方面探讨了循环经济型服务业建设实施的保障体系,为服务业按循环经济的规律运行作了有益的探索。     

资源化治理糖厂"三废"

充分利用蔗糖厂的条件,采取"以废治废"和资源化系列技术治理蔗糖厂"三废",引入清洁生产概念,将污染物治理的产物全部转化为可就地使用的农肥,形成蔗糖业的良性循环,有效促进了蔗糖业的可持续发展.     

室内环境中化学污染物质测定法研究

室内环境中化学污染物质的测定是研究和解决室内环境问题的基础。本文以甲醛和挥发性有机化合物两种室内环境中的主要化学污染物质为例,介绍了目前世界各国采用的各种测定法及其动向,并探讨了测定时期、测定时间、采样点布置等有关问题,提出了一些看法供参考。     

东北地区资源型工业发展对策

资源型工业在东北地区经济发展中占有重要的地位,是地区经济发展的支柱和解决社会就业的主力.在回顾东北地区资源型工业发展历史的基础上,分析了发展中存在的问题和不足,指出振兴东北地区和发展资源型工业的必要性,最后提出了要通过建立支撑系统、优化生产体系、利用国际市场、实行集团化经营、调整产业结构、实现可持续发展等来发展东北地区资源型工业的相应对策.     

山东滨海旅游资源开发及其问题

"海上山东"发展战略的实施,促进了山东省旅游业的快速发展.结合山东省滨海旅游业发展的实际情况,分析了该省滨海旅游资源的特点、旅游业发展现状、存在问题和发展潜力,针对性地提出了综合开发利用旅游资源,发展山东省海滨旅游区的战略设想和对策.     

造纸行业的可持续发展之路

以山东省造纸行业探索可持续发展之路的情况论述了造纸行业取得环境和经济双赢效果的宝贵经验。     

活性污泥法+接触氧化法工艺处理高盐度环氧丙烷生产废水的试验研究

采用活性污泥法和接触氧化两段工艺对高含盐的环氧丙烷生产废水进行处理，同时研究了不同水力停留时间的处理效果和不同的盐度对处理效果的影响。试验结果表明CODcr的去除率可以达84．38％，出水CODcr＜160mg／L，pH＜8。     

高铁酸盐在水和废水处理中的应用进展

本文综述了高铁酸盐用于饮用水的消毒、杀菌、除藻，有机废水的氧化混凝，恶臭物质的氧化去除，重金属离子及放射性废水的混凝沉淀，以及色度浊度的去除等领域的最新进展。并对今后的研究进行了展望。