| Primary explosive play an important role in our war industry domain, and most of primary explosive are inorganic or organic acid heavy metal salt, can bring heavy metal wastewater in the producing process. Heavy metal wastewater is the most harmful industrial wastewater to the entironment and human health, the pollution of heavy metal wastewater is increasingly fearful with the development of industrialisation and straight threaten the health and mind of people. In recent years, the pollution events of heavy metal wastewater are frequently happen and caution us again. K-D double salt primary explosive is China's independent intellectual property rights, so the wastewater question of K-D double salt primary explosive is not reported at abroad. Though the wastewater of K-D double salt primary explosive can reach the relevant effluent standard, the selectivity of present treatment technic is low and may bring secondary pollution and is not a optimal choice. Due to the ponderance of heavy metal wastewater pollution, the problem of environment pollution is more and more regarded. Now nonrenewable resource are deficient, so new treatment technics of primary explosive production wastewater with more environment friendly and effective is important to environmental protection and financial burden of corporation. Among familiar technologies, the ion-exchange resin adsorption method seems to be the most suitable method for removing heavy metal ions from aqueous solution because of its low cost, ease of handling and high efficiency, so it gets extensive attention.On the basic of summarize, two aspects content are mainly studied. Firstly, the adsorption performance of Pb2+, Cd2+ in K·D double salt and GTG primary explosive wastewater, and the treatment of K·D double salt primary explosive wastewater are studied by D418,001×7 ion-exchange resin.001×7 resin is selected as the sorbent of treatment of K-D double salt primary explosive wastewater and the feasibility that the treatment technics of K-D double salt primary explosive wastewater by 001×7 resin is ulteriorly studied. Secondly, the resources of the new treatment technics and modification of ion-exchange resin are studied synchronously. The study contributes practical significance to the environment protection, engineering application and academic basis.Modification of ion-exchange resin is studied in the paper, the modified D401 ion-exchange resin is synthesized by chemical modification of D401 resin and characterized by FT-IR and SEM. And the adsorption properties of Pb2+ on the modified D401 is studied by batch adsorption from adsorption isotherm, adsorption thermodynamics, adsorption kinetics, desorption and adsorption mechanism, and the contrast of adsorption performances on the modified D401 and D401 resin are also studied. The modified D401 resin is provided with macroporous structure and two function groups by analyzing FT-IR and SEM. Experimental results show that at the study condition, the adsorption capacity of the modified D401 resin for Pb2+ is obviously increased compare with D401 resin. Freundlich and Langmuir isothermal adsorption models are both suitable for the equilibrium adsorption of the modified D401 resin and the adsorption rate is mainly governed by liquid film diffusion. Adsorption is an endothermic process that runs spontaneously. The modified D401 resin is provided with fast adsorption rate and good desorption capability, and the adsorption capacity remains stable after several consecutive adsorption-desorption cycles. The modified D401 resin is an efficient adsorbent for the removal of Pb2+ from its single-metal ion solution. The adsorption mechanism is concluded that coordinate atoms N and O of function group combine with Pb2+ by coordination bond and H+ ionized by function groups exchanges with Pb2+.The adsorption properties of Pb2+ and Cd2+ on D418,001×7 ion-exchange resin are studied by batch adsorption, dynamic adsorption of Pb2+ of K·D double salt primary explosive wastewater is also studied by column adsorption. At the study condition, Freundlich and Langmuir isothermal adsorption models are both suitable for the adsorption process of Pb2+ on D418 resin, and Freundlich isothermal adsorption model is more suitable for the adsorption process of Cd2+ on D418 resin; And Langmuir isothermal adsorption model is suitable for the adsorption process of Pb2+ on 001×7 resin, Freundlich isothermal adsorption model is suitable for the adsorption process of Cd2+ on 001×7 resin. The adsorption rate is governed by liquid film diffusion and intraparticle diffusion corporately. The feasible technics conditions of dynamic adsorption of D418 resin are:adsorption rate,6 BV/h; adsorption temperature,313 K; desorption rate 3 BV/h; desorption temperature, room temperature; desorbent,3 mol/L nitric acid; desorbent dosage,5 BV. And the feasible technics conditions of dynamic adsorption of 001×7 resin are:adsorption rate,6 BV/h; adsorption temperature, room temperature; desorption rate 3 BV/h; desorption temperature, room temperature; desorbent,3 mol/L nitric acid; desorbent dosage,4 BV.The treatment of K-D double salt primary explosive wastewater by ion-exchange resin is studied.001×7 resin is selected as the sorbent of treatment of K-D double salt primary explosive wastewater and the feasibility that the treatment technics of K-D double salt primary explosive wastewater by 001×7 resin is ulteriorly studied. The study provides a new treatment technics for removing heavy metal ions of K-D double salt primary explosive, the treatment technics is provide with high efficiency, ease of handling and no secondary pollution. The column adsorption experimental results show the adsorption and desorption effect of new treatment technics is well and steady, removal efficiency is close to 100%, desorption efficiency reach 94% and unit volume of resin can dispose 84 times volume actual wastewater. The last time 2 BV low concentration desorption solution can be used for next desorption and desorption efficiency is steady. In conclusion, the ion-exchange resin adsorption method is provide with high efficiency, ease of handling, no secondary pollution and can recovery heavy metals from wastewater, so it is a suitable method for the removal of heavy metal ions from primary explosive production wastewater.
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