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采用DRH-1型树脂吸附处理甲苯二异氰酸酯 (TDI) 生产过程中产生的硝化碱洗废水,原废水中硝基苯类含量为1.6×103mg/L~4.6×103mg/L,COD为2.87×103mg/L~6.38×103mg/L,经酸化沉淀-树脂吸附处理后,出水硝基苯类可达到污水综合排放一级标准,COD为241mg/L~479mg/L,再经催化氧化处理后,COD能稳定在200mg/L以下.树脂解吸后可重复使用,解吸液蒸馏回收溶剂后,釜内残液中含生产TDI的中间体达50%以上. 相似文献
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树脂吸附法处理水杨酸甲酯生产废水的研究 总被引:7,自引:0,他引:7
采用吸附树脂NDA—99处理水杨酸甲酯生产废水,结果表明该树脂时废水中的5磺基水杨酸及水杨酸均具有良好的吸附—脱附性能.废水经预处理和吸附处理后,CODCr由57000-59000mg/L降至6300mg/L左右,去除率接近89%.用IBV8%NaOH 3BVH2O作脱附剂,在温度为60℃、流量为IBV/h的条件下,脱附率接近100%,树脂可重复使用.高浓度脱附液经酸化、浓缩、冷却结晶,可回收5—磺基水杨酸,回收率为95%左右。纯度为78%。 相似文献
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研究了3种非苯乙烯超高交联吸附树脂对空气、溶液及表面浮苯的吸附滤除性能。结果表明,在C0=1722.6mg/L和C0=181.4mg/m3的水溶液或空气体系中,CMB-CMB-XDC(二氯甲基联苯自聚后与二氯甲基苯共聚)树脂对苯的吸附量与穿透吸附量分别可达874.6mg/g和41.59mg/g;对水面浮苯的吸附在3min内可达4360mg/g以上。新型非苯乙烯树脂吸附速度快、容量大,可经再生反复使用,预期在非极性芳烃废气(水)净化及突发污染事故快速处理领域具有很好的应用前景。 相似文献
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树脂吸附法处理异丙隆生产过程中含异丙隆废水的研究 总被引:3,自引:0,他引:3
本文用CHA—101树脂处理异丙隆生产过程中的含异丙隆废水,控制泄漏点在异丙隆浓度为140mg/l时,树脂可处理废水36BV,树脂工作吸附量约70mg/ml,树脂的吸附率达95%,吸附后废水经试验可完全套用到生产异丙隆工段中去,实现了闭路循环。树脂吸附饱和后,用工业酒精能基本脱附异丙隆。 相似文献
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将树脂吸附剂应用于焦化废水的深度处理,考察了温度、投加量、初始pH、时间和流速对CODcr和色度去除效果的影响.静态吸附实验确定了最佳吸附树脂为NDA-99型树脂,最佳投加量为3.00g/L,无需调节pH,最佳温度为303K,吸附等温线满足Freundlich方程.通过动态实验确定了最适宜工艺条件为:流速20BV/h,单柱废水处理量为200BV/批;处理后废水中CODcr浓度从199mg/L降到100mg/L以下,色度从98倍降到50倍以下.使用8%的NaOH溶液脱附再生,最佳脱附流速为5BV/h. 相似文献
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The adsorption of 2,4-dinitrophenol and 2,6-dinitrophenol on non-polar and polar adsorbents was studied.The results showed that the equilibrium adsorption did not comply with the Langmuir equation and was not mono-layer adsorption .It is of interest to notice that the effect of pH on the adsorption of 2,4-or 2,6-dinitrophenol onto ADS-7 and ADS-21 was very small,The result is explained by hydrogen bonding interaction between 2,4-or 2,6-dinitrophenol and the adsorbent ADS-21.The large adsorption capacity of dinitrophenol onto ADS-21,which was about 500mg/g at an equilibrium concentration of 400mg/L,and the small dinitrophenol leakage in the effluent from ADS-21 column presented a good prospect for treatment of wastewater containing dinitrophenol with adsorbent ADS-21. 相似文献
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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. 相似文献
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SHI Zuoqing XU Mancai LIN Xue XU Mingcheng FAN Yunge SHI Rongfu YANG Yizhong HE Binglin 《Chinese Journal of Reactive Polymers》2000,(1)
1 INTRODUCTIONPhenol and many substitUted phenols, such as nitrophenols, chlorophenols and aminophenolset al, are the common organic pollutantS existing in wane water of many chemical plants.Treatment of the wastewater containing phenols is an important project for environmentprotection and has been studied by various methods, such as dialysis ['l, microbial degradation ['1,oxidation l'l, extracting with solvents I4] and adsorption with polymeric adsorbents IS]. Theadsorption method is v… 相似文献
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《中国化学快报》2023,34(1):107180
Heavy metals usually exist stably as the species of organic complexes in high-salinity wastewater. Therefore, their effective removal is challenging, especially when the initial pH is neutral. Herein, a novel nitrogen doped biomass-based composite (N-CMCS) was synthesized to remove the complexed heavy metal of Cr(III)-carboxyl. The maximum adsorption capacity of Cr(III)-Citrate (Cr-Cit) by N-CMCS under neutral pH (7.0) and high-salinity (200 mmol/L NaCl) condition was up to 2.50 mmol/g. And the removal performance remained stable after 6 times of regeneration. Combined with species and characterizations analysis, electrostatic attraction and hydrogen bonding were the main mechanisms for N-CMCS to remove Cr(III)-carboxyl complexes. Dynamic adsorption indicated N-CMCS column could treat about 1300 BV simulated wastewater and 350 BV actual wastewater with the concentration of effluent lower than 1.0 mg/L. Furthermore, N-CMCS could remove a variety of complexed heavy metal ions under neutral pH, indicating the great potential in practical application. 相似文献
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1INTRODUCTIONPhenylaceticacidisakeyintermediateofmedicine,pesticideandperfume.ItismainlyproducedbyhydrolysisofbenZylcyanidedomestically,whichwilldogreatharmtoenvironmentandhealthduetothetoxicityoftherawmaterialll].JininginstitUteofChemicalEngineeringDesignhassuccessfullydevelopedanewcarbonyltechnologyforproductionofPhCH,COOH.InthistechnologyNaOH,COandbenZylchlorideareusedasrawmaterialsandmethanolassolvent.ThePhCH,COOHwillbeachievedafteracidificationofphCH,COONaAtthesametime7t… 相似文献
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TREATMENT AND RESOURSE REUSE OF INDUSTRIAL WASTEWATER FROM PRODUCTION PROCESS OF PHENYL ACETIC ACID 总被引:1,自引:0,他引:1
The effluent from phenyl acetic acid (Ph CH2COOH) production process can be treated with NDA-999 macroporous polymeric adsorbent with about 100% remopval efficiency of Ph CH2COOH,benzyl alcohol(PhCH2OH) and benzaldehyde(PhCOHO)as well as the decrease in Total Organic Carbon(TOC)from 4691mg/l to <300mg/L.3.7kg phCH2COOH and 120kg NaCl will be recovered from per m^3 wastewater and the adsorbent can be reused after being regenerated by NaOH aqueous solution and methanol.Good economic,social and environmental results can be achieved with this method. 相似文献
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毕克草为一种新型除草剂,通常情况下很难被降解,本文利用物理吸附原理通过自行制备的大孔吸附树脂从农药水中对其进行了回收,回收效果良好,同时也达到了废水处理的目的。优化的最佳实验条件:室温下,pH=1.0以及流速为5BV/h时,对COD为15000mg/L的毕克草废水吸附处理后,其出水可达《污水综合排放标准》(GB89—1996)中的一级排放标准;洗脱再生时,室温下,用95%的乙醇洗脱,流速为2BV/h,(即2倍树脂床体积/h)回收率可达98.4%,纯度达93.7%,总流程一次可处理该废水240mL。 相似文献