Decolorisation of H‐acid manufacturing process wastewater by anion exchange resin

Abstract

Anion exchange resin was employed to examine the feasibility to treat the H‐acid manufacturing wastewater by column experiment. Besides the acidity recovery, the decoloring efficiency and chemical oxygen demand (COD) removal efficiency of the anion exchange resin was investigated in the experiments. The results revealed that the anion exchange resin was able to remove colourful pollutants and degrade a part of COD effectively, and at the same time reserve acidity in the wastewater solution. The resin regenerated by a 10% NaCl aqueous solution had the same ability to discolour and remove the COD from the wastewater as the new resin had. The resin regenerated by 3% w/w NaCl aqueous solution, which was the same concentration as seawater, also had, to some extent, the same effect on decolorisation and the removal of COD; however, its colour and COD removal performance was not as efficient as the resin regenerated by 10% w/w NaCl and the new resin. H‐acid (0.25%) was also successfully recovered from the regenerating solutions.

A comparative study on the adsorption of 8-amino-1-naphthol-3,6-disulfonic acid by a macroporous amination resin

“…0.01-0.1 mol/L NaCl, Na 2 SO 4 and NaNO 3 was added separately in the H-acid aqueous solution to study the effect of ions strength on adsorption capacities. At last, the flasks were completely sealed and placed in the shaker at 288, 303 and 318 K for 48 h. The concentrations of adsorbate in the solutions were obtained by measuring the UV adsorption at 235 nm for H-acid (UV analyzer, Mapada UV3100-PC, China) [21]. Adsorption data were collected for all the above experiments.…”

Recent advances in treatment technology of wastewater containing H‐acid: a mini‐review

“…24 Compared to activated carbon, adsorption resins are widely recognized for their ease of regeneration and superior repeatability. 25 Recently, Zhang et al 21 developed a novel macroporous amination resin and compared its performance with that of three commercial resins, as shown in Fig. 2.…”

“…Compared to activated carbon, adsorption resins are widely recognized for their ease of regeneration and superior repeatability 25 . Recently, Zhang et al 21 .…”

Optimization on the Improvement Schemes of Production Logistics System Based on Flexsim Simulation

“…Siqintana Bao, Hongxia Chen and Guangjun Jiang introduced the concept of logistics and simulation technology, illustrated the plan for optimizing the logistics of a streamline based on the software Flexsim and explained the process of simulating and optimizing the logistics of a four-line example with the software Flexsim [2]. In order to find bottlenecks in the flow, Han Yuan and Yabo Luo found the bottlenecks in the flow and eliminated the bottlenecks by simulation and optimization through building the simulation model process, setting the parameters and writing the code logic [3]. According to the step s of building product line using Flexsim, Lvlong Zou built the ESHLEP-N model of pressing machines at first, then studied the interface technology between the token, transition, and rule in ESHLEP-N model of pressing machines.…”