TREATMENT AND RESOURCE REUSE OF 1，2，4—ACID PRODUCING EFFLUENT WITH MACROPOROUS POLYMERIC ADSORBENT

The treatment and resource reuse of 1,2,4-acid producing wastewater by self-mademacroporous adsorption resin ND,A-107 was studied in this paper. Optimum adsorption anddesorption process parameters were acquired by systematically study. The polymeric resin NDA-10 7indicated good adsorption & desorption of 1,2, 4-acid in the wastewater. The removal efficiency of1,2,4-acid, CODer is about 78%, 72% respectively. It is evident that this adsorption process is anefficient treatment method for 1,2,4-acid producing wastewater. At the same time, the accumulationand resource reuse of l,2, 4-acid can be realized in this process.     

邻硝基苯甲醚生产废水预处理工艺的研究

采用"酸化-树脂吸附"法对邻硝基苯甲醚生产废水进行预处理研究。比较了XAD-4、NDA-88、NDA-99、NDA-150几种树脂对酸化后废水中邻硝基苯酚的静态吸附行为,并选用吸附量较大的NDA-150树脂对该废水进行了吸附及脱附研究。结果表明,pH为4时,NDA-150树脂的平衡吸附量4.38mmol/g。动态吸附处理量为40BV(树脂体积)时,酚去除率95%,以8%NaOH为脱附剂,温度333K,脱附率98%。该工艺CODCr总去除率92%,邻硝基苯酚总去除率99%,每升废水可回收邻硝基苯酚10.8g,纯度大于97%。     

THEATMENT OF WASTEWATER FROM PRODUCTION PROCESS OF 2,3-ACID

IINTRODUCTIONWastewaterbearingnaphthalenedyeintermediateshasthefollowingcharacteristics:highconcentration,acutetoxicity,resistancetobiodegradation,strongacidityorbaseness,andsoon.Therefore,thewastewaterisdifficulttodealwith.Onetypicalkindofsuchdyeintermediateis2,3--acid(2--hydroxy--3--carboxylic-napthfromitsproducingprocedurethereisaneffluentwithCODcrv200or3000mg/Ldischarged.Theorganicchemicalsintheeffluentaremainlycomprisedof2-naphthanol,2,3--acidand2,6--acid.Thetotalconcentrationofthe…     

树脂吸附法处理1,4-二羟基蒽醌生产废水的研究

本文研究了树脂吸附法处理1,4-二羟基蒽醌生产废水。结果表明,NDA-404大孔吸附脂对该废水具有良好的吸附-脱附效果。原废水中邻苯二甲酸浓度约为4700-12000mg/L,CODCr约为6800-24000mg/L,经树脂吸附处理后,邻苯二甲酸的吸附率≥99.5%,CODCr去除率≥99.5%,树脂的脱附率为100%。邻苯二甲酸的回收率≥80%,在废水有效处理的同时实现了废物资源化。     

TREATMENT OF WASTEWATER FROM PRODUCTION PROCESS OF 2，3—ACID

Wastewater from production process of 2,3-acid was treated by adsorption using macroporous resin NDA-708.After only one-step treatment by resin adsorption,removal efficiency of three kinds of naphthalene chemicals was above 99%;removal eficiency of CODcr was above 96%.Under proper operating condition,desorptionefficiency was around 100%.The running records of the industrial facility showed that the naphthlene chemicals in desorption effluent could be reused without obvious influence on the quality of the product.     

树脂吸附法处理2-萘酚工业废水的研究

本文研究了树脂吸附法处理含2-萘酚工业废水。结果表明，CHA-111吸附树脂对该废水具有良好的吸附与脱附效果。2-萘酚的吸附率大于99％，脱附率可达95％以上，实现了废水中2-萘酚的富集回收与资源化。     

树脂吸附法处理邻硝基苯酚废水的研究

本文采用自制的大孔吸附树脂ＮＤＡ－１１７,吸附处理邻硝基苯甲醚生产过程中产生的高浓度邻硝基苯酚废水,原废水邻硝基苯含量７４００－１１００００ｍｇ／Ｌ,经中和沉淀－树脂吸附法处理,处理量２０ＢＶ。吸附流出液邻硝基苯酚含量６０－８０ｍｇ／Ｌ,邻硝基苯酚去除率≥９９％,树脂经碱液脱附可重复使用,并回收高纯度邻硝基苯酚,且运行稳定,该处理工艺投资少,操作简便,可望实现工业化。     

树脂吸附法处理3,6-二氯水杨酸生产废水

研究了树脂吸附法处理3,6-二氯水杨酸生产废水的工艺过程。结果表明,NDA-77吸附树脂对该废水具有良好的吸附-脱附效果。经树脂吸附处理,废水中主要有机污染物2,5-二氯苯酚和3,6-二氯水杨酸均得到去除,总有机碳(TOC)由210mg/L降为20mg/L以下,吸附饱和的树脂可采用稀碱液实现完全再生。经吸附处理去除有机物后,废水中含有20%的KCl,可进入工厂现有的KCl隔膜电解装置,用于KOH的生产。     

ZK-1树脂对对甲基苯胺工业废水的柱吸附研究

选择NDA-150与ZK-01树脂作为吸附剂,以工业对甲基苯胺废水为研究对象,进行了树脂柱吸附废水的研究.工业对甲基苯胺废水中,对甲基苯胺含量为5300mg/L,吸附过程中,流量为1BV/h,温度为303K,NDA-150与ZK-01树脂分别吸附处理废水12BV、19BV时,废水中对甲基苯胺去除率为约98%.实验结果表明,ZK-01树脂吸附处理对甲基苯胺废水能力强于NDA-150,这是由于ZK-01树脂骨架上键联的弱酸基团与氨基生成酸碱络合物的结果.通过分析ZK-1树脂吸附-脱附处理对甲基苯胺废水的稳定性试验与脱附所得回收物质鉴定,ZK-1树脂具有运行稳定与回收物质可利用的特点.     

THE TREATMENT OF SALICYLIC ACID MANUFACTURING WASTEWATER BY HYPERCROSSLINKED POLYMERIC ADSORBENT (NDA-100)

1. INTRODUCTION China is a major producing country of salicylic acid. Salicylic acid is an important intermediate in the manufacture of medicine, food, perfume, dye and so on. Generally, phenol is used as a raw material to manufacture salicylic acid throu…     

THE TREATMENT OF SALICYLIC ACID MANUFACTURING WASTEWATER BY HYPERCROSSLINKED POLYMERIC ADSORBENT（NDA—100）

The treatment of salicylic acid manufacturing wastewater by NDA-100 resin wasinvestigated. The sorption intensity of phenol was found to be strongly dependent on pH of theaqueous phase. Equilibrium adsorption data fit to both Langmuir and Freundlich models. Thecolumn adsorption showed thatthis process was suitable for the treatment of salicylic acidmanufacturing wastewater About 99.9% CODcr removal was obtained under the optimal operatingconditions. The resin could be completely regenerated with 1 BV8%(w/w) NaOH+2BV H2O, therecovery of 98.9% of the substance was reached. This process makes it possible to recover thevaluable material from the wastewater and to improve the effluent water quality.     

STUDIES ON THE ADSORPTION OF PHENOLIC COMPOUNDS ON A PS-BASED RESIN MODIFIED BY NITRO FUNCTIONAL GROUPS

A new adsorbent (JN-01) was prepared by modifying resin NDA-1800 with nitro functional groups.The adsorption capacities of resins XAD-4,NDA-1800 and JN-01 were investigated,and the results indicated that the modified resin JN-01 was much better in adsorbing phenol,p-nitrophenol and p-cresol.The adsorption capacities of the resin JN-01 were higher than those of the resins XAD-4 and NDA-1800 within a temperature range of 283-323 K,which might be attributed to the higher surface area and the partial polarit...     

STUDY ON THE TREATMENT OF INDUSTRIAL WASTEWATER CONTAINING TRIETHYLAMINE WITH POLYMERIC ADSORBENTS

The treatment of the industrial wastewater,in which the concentration of triethylamine (TEN) and CODcr was around 3450mg/L and 22400mg/L respectively,was studied by adsorption of macroporous resins,Results demonstrate that the polymeric adsorbent CHA-111 has excellent effect on the adsorption and desorption of TEN.The concentration of TEN in the effluent is less than 30mg/L,and the removal efficiency of TEN and total CODcr exceed 99% and 95% respectively.The accumulation and resource reuse of TEN can be realized in this process.     

TREATMENT OF SORBIC ACID MANUFACTURING WASTEWATER BY HYPERCROSSLINKED POLYMERIC ADSORBENT (NDA-150)

1. INTRODUCTION The chemical name of sorbic acid is 2,4-hexadienoic acid. Toxicity of sorbic acid is less than any other preservative, which is internationally acknowledged. Sorbic acid can participate in mans metabolism and can be easily oxidized, then …     

TREATMENT OF SORBIC ACID MANUFACTURING WASTEWATER BY HYPERCROSSLINKED POLYMERIC ADSORBENT（NDA-150）

The treatment of sorbic acid manufacturing wastewater by NDA-150 resin wasinvestigated. The experiments show that this process is suitable for the treatment of sorbic acidmanufacturing wastewater. About 98% sorbic acid and 50% CODcr were removed under optimaloperating conditions, and 70% of sorbic acid in sorbic acid manufacturing wastewater wasreclaimed. This process makes it possible to recover valuable materials from the wastewater and toimprove the quality of effluent water.     

树脂吸附法处理有毒有机化工废水及其资源化研究

介绍了大孔树脂的发展及在有机化工废水处理及资源化领域的应用,包括大孔树脂的合成、吸附作用的基本原理以及在具体化工废水处理项目（如2,3-酸、对硝基酚等）的应用。     

氨基酸螯合吸附树脂对Cu2+的吸附行为

合成了一种Ｌ-酪氨酸修饰的螯合吸附树脂（ＡＪＳ-０２）,并与超高交联树脂ＮＤＡ-１５０作对比,研究了其 对Ｃｕ^２＋的吸附和脱附行为。静态实验结果表明,在研究的浓度范围内,吸附平衡数据符合Ｌａｎｇｍｕｉｒ等温吸附方程。Ｃｕ^２＋在ＡＪＳ-０２上的吸附量大于其在ＮＤＡ-１５０上的吸附量。Ｃｕ^２＋在２种树脂上的吸附过程为物理和化学作用的共同结果。吸附动力学符合液膜扩散方程,液膜扩散为吸附速率的主要控制步骤。动态吸附-脱附实验表明,动态穿透吸附量和总吸附量分别为４.０５×１０^－３和６.４４×１０^－３ ｍｏｌ/Ｌ,使用5%HCl进行脱附,脱附率达到90％以上。     

大孔树脂对对硝基苯胺的吸附行为及其应用研究

研究了溶液中无机盐、pH值对氨基修饰超高交联大孔树脂NDA-99、氧修饰超高交联大孔树脂NDA-150和大孔树脂XAD-4吸附对硝基苯胺的影响。结果表明,无机盐对吸附影响不大;NDA-99、NDA-150在中性范围吸附量最大,XAD-4的吸附量随pH增大而增大;3种树脂的吸附等温线都能很好的利用Freundlich方程进行拟合,吸附皆为放热反应且为优惠吸附;3种树脂的饱和吸附量大小依次为NDA-150>NDA-99>XAD-4。依据上述结论,采用NDA-150处理对硝基苯胺生产母液废水,每批次处理量为40BV,废水中对硝基苯胺浓度由2130mg/L降至9.6mg/L,去除率达99.5%,吸附后的树脂采用95%的乙醇可完全再生,高浓度对硝基苯胺乙醇再生溶液经蒸馏可回收对硝基苯胺和脱附剂,实现了废水治理与资源化的统一。     

ADSORPTION OF 1,2,4-ACID BY WEAKLY BASIC RESIN： ISOTHERMS, THERMODYNAMICS AND KINETICS

The adsorption properties, including the adsorption isotherms, thermodynamics and kinetics, of l-amino-2-naphthol-4-sulfonic acid (1,2,4-acid) onto weakly basic resin ND900 are investigated. Both the Langmuir and Freundlich equations can give a good fit to the adsorption isotherms, which indicates an endothermic and a favorable adsorption in our study range. A high yield in elimination of about 45.21%-97.28% is obtained for the tested adsorption systems. The capacity and affinity of the adsorption increase with temperature, due to the phenomena of “solvent-motivated” effects. The value of ΔH is 51.59 kJ/mol, which indicates a chemical adsorption and then expects the poor desorption property of ND900. The negative value of ΔG indicates the spontaneous nature of the adsorption process, and the positive value of ΔS shows the increased randomness at the solid/solution interface during the adsorption process. The value of the adsorption rate constant lower than 0.013 min^-1 is indicative of a slow adsorption rate. The intra-particle diffusion must be one of the rate limiting steps.     

TREATMENT AND RESOURCE REUSE OF WASTEWATER FROM NAPHTHOL AS-E PRODUCTION PROCESS

1. INTRODUCTION Naphthol As-E is an important intermediate of organic pigment and dyestuff. It is produced by condensation of 2,3-acid (2-hydroxy-3-carboxlic -napthalene) and p-Aminochlorobenzene with wastewater discharged [1]. The detected organic chemicals in the wastewater are primarily composed of 2,3-acid and a little naphthol As-E (Table 1). Both of them are very toxic and resistant to biodegradation. If discharged directly, the valuable materials in the wastewater would be waste…