树脂吸附法处理氯化苯生产中的副产盐酸

用大孔吸附树脂对氯化苯生产中的副产盐酸进行吸附处理。试验结果表明，含苯、氯化苯和二氯苯质量浓度为448．56mg／L的副产盐酸，在常温、吸附流量为4BV／h的条件下，经过ND-150大孔吸附树脂吸附处理后，副产盐酸中的有机物质量浓度可降至1mg／L以下，有机物的去除率达99．8％，处理后的副产盐酸由浅黄色变为无色透明，且无芳香烃化合物的气味。吸附后的ND-150大孔吸附树脂经乙醇洗脱再生后可重复使用，其对副产盐酸仍具有较好的吸附作用。     

强碱性离子交换树脂再生新工艺的研究

用还原性的硫酸亚铁溶液作为再生剂，对吸附Cr^6 的强碱性离子交换树脂的再生机理进行了初步的探讨和再生工艺的研究，试验结果表明，用硫酸亚铁溶液作为再生剂，可以降低铬离子对树脂骨架的破坏，再生效率可以保持在0．85以上，再生工艺条件如下：再生剂硫酸亚铁溶液的浓度为0．5－1．0mol/L，用量为树脂体积的3－5倍，PH为1－2，流速为2－4m/h，再生温为25－45℃。     

ECONOMICS OF CONTROLLING NATURAL SALT SOURCES IN THE ARKANSAS RIVER BASIN1

ABSTRACT: The methodology underlying, and the estimates incorporated in the Corps of Engineers' economic evaluation of the Arkansas River Basin Chloride Control Project are evaluated and judged deficient in several ways. An improperly specified alternative cost analysis probably results in overestimates of the total regional demand for water, the demand for Arkansas River Water, and the cost-savings realized with the project in place. The quantitative effect of these errors is not determined. However, other adjustments are identified which are evaluated using the Corps' data. These adjustments reduce B/C from 2.64 to 0.57; principally as a result of corrections for over-estimates of cost-savings in steam-electric generation, and for use of improper discounting procedures and gross output-earnings ratios.     

可见光固化树脂固定化含黄嘌呤脱氢酶细胞的研究

含黄嘌呤脱氢酶的细胞用可见光固化树脂包埋 ,经可见光照射交联 ,制备了固定化细胞 .可见光照射 3min对细胞的存活和细胞中黄嘌呤脱氢酶的活性没有影响 .固定化细胞的黄嘌呤脱氢酶降解次黄嘌呤的最适温度为 35℃ ,最适pH为 8 0 .在pH6— 8,温度低于 40℃时稳定 .连续使用 10批 ,平均降解次黄嘌呤 99 19%,酶活力保留 94 99%.     

腐殖酸存在对改善GDX—102树脂吸附富集性能研究

选用ＧＤＸ－１０２树脂其对水中小分子有机物和腐殖酸共同存在时的吸附集集作用，发现当有ＨＡ存在时，树脂对小分子有机物的吸附率显著增加，且是可逆的，先后用ＣＨ２Ｃｌ２和ＮＨ３；乙醇进行分级洗脱，得到满意的洗脱回收率。     

高吸油树脂的新进展及应用

综述了高吸油树脂的发展历史及最新进展,介绍了其吸油机理。讨论了高吸油树脂在含油废水治理及其他领域的应用。指出高吸油树脂是一类性能优异的新型环保材料。提出了高吸油树脂应在原料的选择、性能的改进、结构分析、再生利用、开拓新的应用领域、新聚合工艺等方面进行更深入的研究。     

天然高分子吸附剂研究——羧甲基交联壳聚糖树脂的合成及吸附特性

以壳聚糖为原料，经乙二醇双缩水甘油醚交联后，与氯乙酸反应，合成了羧甲基交联壳聚糖树脂，并研究了其对Ｃｕ＾２＋、Ｎｉ＾２＋，Ｃｏ＾２＋的静态吸附性能，结果表明，该树脂对上述３种金属离子均具有良好的吸附性能，其吸附容量分别达２．２５，１．９８和１．８１ｍｍｏｌ·ｇ＾－１。     

治理酚醛树脂生产废水的试验

试验采用酚醛缩聚－二段生物氧化法处理酚醛树脂生产废水。经缩聚处理可以去除90％的挥发酚、70％－80％CODcr,回收树脂0．036－0．04t/t废水。生化段进水CODcr1400-3000mg／L,T25－28℃,微生物量2．5－3．0g／L,DO2．0－4．0mg／L,HRT≥23h,CODcr去除率≥95％、挥发酚去除率≥98％。在试验条件下,该工艺抗负荷冲击能力量,能稳定地去除废水中的CODcr和挥发酚。     

Effect of Fe loading quantity on reduction reactivity of nano zero-valent iron supported on chelating resin

In this study, nanoscale zero-valent iron (NZVI) were immobilized within a chelating resin (DOW 3N). To investigate the effect of Fe loading on NZVI reactivity, three NZVI-resin composites with different Fe loading were obtained by preparing Fe(III) solution in 0, 30 and 70% (v/v) ethanol aqueous, respectively; the bromate was used as a model contaminant. TEM reveals that increasing the Fe loading resulted in much larger size and poor dispersion of nanoscale iron particles. The results indicated that the removal efficiency of bromate and the rate constant (K_obs) were decreased with increasing the Fe loading. For the NZVI-resin composite with lower Fe loading, the removal efficiency of bromate declined more significantly with the increase of DO concentrations. Under acidic conditions, decreasing the pH value had the most significant influence on NZVI-R3 with highest Fe loading for bromate removal; however, under alkaline conditions, the most significant influence of pH was on NZVI-R1 with lowest Fe loading. The effects of co-existing anions NO3−, PO43− and HCO3− were also investigated. All of the co-existing anions showed the inhibition to bromate reduction.     

XAD-2树脂表征焦化厂土壤中高环PAHs的生物可给性

利用Amberlite XAD-2树脂辅助解吸技术表征某焦化厂土样中高环PAHs的解吸特征及其生物可给性,分析风险评估过程中考虑污染物生物可给性的可行性;采用傅里叶红外光谱法测试解吸前、后土样的红外光谱特征,判断不同土壤有机官能团对PAHs的吸附强弱. 结果表明:土样中PAHs前30 d的解吸速率明显大于后60 d(前者的解吸速率比后者高2～3个数量级),60 d后污染物解吸基本已达到平衡,整个过程符合两阶段解吸模型. 渗漏污染途径下土样中高环PAHs的生物可给性为0.18～0.47,低于大气沉降污染途径下表层土样中对应PAHs的生物可给性(1.00),表明在开展场地健康风险评估过程中,应考虑具体场地土壤中PAHs的生物可给性,以在一定程度上降低评估结果的保守性. 解吸前、后土样红外光谱特征整体无明显变化,解吸过程不改变土壤主要有机官能团类型,但解吸后土壤中羟基和羧基的峰强明显减弱,吸附于羟基及羧基上的PAHs可能更易解吸.