Comparative studies of the Fe3+/2+-UV, H2O2-UV, TiO2-UV/vis systems for the decolorization of a textile dye X-3B in water

The degradation of a common textile dye, Reactive-brilliant red X-3B, by several advanced oxidation technologies was studied in an air-saturated aqueous solution. The dye was resistant to the UV illumination (wavelength λ  320 nm), but was decolorized when one of Fe³⁺, H₂O₂ and TiO₂ components was present. The decolorization rate was observed to be quite different for each system, and the relative order evaluated under comparable conditions followed the order of Fe²⁺–H₂O₂–UV  Fe²⁺–H₂O₂ > Fe³⁺–H₂O₂–UV > Fe³⁺–H₂O₂ > Fe³⁺–TiO₂–UV > TiO₂–UV > Fe³⁺–UV > TiO₂–visible light (λ  450 nm) > H₂O₂–UV > Fe²⁺–UV. The mechanism for each process is discussed, and linked together for understanding the observed differences in reactivity.     

Assessment of Contamination By Percolation Of Septic Tank Effluent Through Natural and Amended Soils

Fly ash has been found to be a potential material for the treatment of municipal and industrial wastewater, and may be useful in the treatment of septic tank effluent. Laboratory columns (30 cm) were used to determine the sorption capacity and hydraulic properties of lagoon fly ash, loamy sand, sand, and sand amended by lagoon fly ash (30 and 60%) and red mud gypsum (20%). The removal of chemical oxygen demand (COD) was high in all column effluents (71–93%). Extent of nitrification was high in Spearwood sand, Merribrook loamy sand and 20% red mud gypsum amended Spearwood sand. However, actual removal of nitrogen (N) was high in columns containing lagoon fly ash. Unamended Spearwood sand possessed only minimal capacity for P sorption. Merribrook loamy sand and red mud gypsum amended sand affected complete P removal throughout the study period of 12 weeks. Significant P leakage occurred from lagoon fly ash amended sand columns following 6–10 weeks of operation. Neither lagoon fly ash nor red mud gypsum caused any studied heavy metal contamination including manganese (Mn), lead (Pb), zinc (Zn), cadmium (Cd) and chromium (Cr) of effluent. It can be concluded that Merribrook loamy sand is better natural soil than Spearwood sand as a filter medium. The addition of lagoon fly ash enhanced the removal of P in Spearwood sand but the efficiency was lower than with red mud gypsum amendment.     

磁性肥料及其对水稻生长的影响研究

磁性肥料能明显促进水稻的生长和提高生物产量，在以广州发电厂的粉煤灰为主要磁性物质时，对赤红壤和水稻来说，其磁性肥料磁处理的最佳磁感应强度是０．２２Ｔ．     

赤潮防治剂对中国对虾的毒性研究

为研究赤潮防治剂对中国对虾的影响,进行了粘土、Ｃａ（ＣＩＯ）２、ＡＩＣＩ３、ＦｅＣＩ３对中国对虾的毒性实验。结果表明：（１）粘土对对虾基本无毒性;（２）Ｃａ（ＣＩＯ）２在低浓度下对对虾无毒,在高浓度下对对虾有急性和慢性毒性;（３）ＡＩＣＩ３和ＦｅＣＩ３在对虾体内有一定的积累,但其毒性效应有待于进一步分析。     

江西陆相红盆地1∶5万区调中的经济地质调查

为了拓展区调工作的服务领域,"九·五"期间,我们在江西白垩纪—新近纪陆相红盆地1∶5万区调工作中,对红盆区经济地质的调查作了一些有益的探索,取得了较显著的经济和社会效益。本文主要从矿产地质、农业地质、旅游地质和灾害地质四个方面,对陆相红盆地经济地质调查工作方法进行探讨。     

海洋岛与王家岛周围海域赤潮生物夜光藻生态初探

对王家岛与石城岛周围海域浮游生物和理化因子的调查资料进行分析，结果表明，夜光藻的生物量以夏季两岛的南部及中部为最高，影响夜光藻繁殖的各环境因子中以浮游植物、可溶性无机磷、总氮、溶氧的共同作用最为显著，Ｙ＝ － ２５７－０ ＸＤＯ＋ ７２－０ ＸＮ－ １３３６－３ ＸＰ＋ １－８０ ＸＦ－ ２２５０ 。Ｒ＝ ０－７１３ ，Ｆ＝３－１０，统计检验，相关显著，回归有意义。     

自组织神经网络在有害赤潮预警研究中的应用

根据非线性理论及有害赤潮的特点，探讨应用人工神经网络原理进行赤潮预警预报的方法，提出网络可塑性较强，无监督的ART－KOHONEN网络模型，阐述了其基本原理和算法。将该模型应用于辽宁省营口市鲅鱼圈海域，结果表明：该方法能较理想地解决无训练样本的分类识别问题，具有较高的精度，可用于有害赤潮的预警预报工作。     

柳州地区各种红壤土种的酸沉降临界负荷研究

应用简单质量平衡法，多层模型ＰＲＯＦＩＬＥ和基于植物响应标准计算柳州红壤和土种的酸沉降临界负荷，并建立了系统完整地收集，测量与估算模型所需参数的方法。结果表明，柳州红壤各土种的硫沉降临界负荷为０．５０－１．８０ｋｅｑ．ｈｍ＾－２．ａ＾－１，为保护９５％的土壤不受酸沉降危害，柳州土壤的潜在酸度，酸度和硫沉降临界负荷分别为１．８ｋｅｑ；ｈｍ＾－２．ａ＾－１，１．９ｋｅｑ．ｈｍ＾－２．ａ＾－１和０．７０     

双季铵盐对两种赤潮藻的去除研究

研究了双季铵盐对球形棕囊藻和塔玛亚历山大藻两种赤潮生物的杀灭和控制作用。结果表明,双季铵盐能有效地控制和杀灭球形棕囊藻和塔玛亚历山大藻,其中对球形棕囊藻96h有效浓度为0.8mg·L-1,对塔玛亚历山大藻有效浓度为0.4mg·L-1。双季铵盐具有高效、作用时效长的特点,是一种较理想的赤潮藻去除剂。