In recent years, people have done more and more research on the application of humic acid in environmental protection, and some of the results have been applied to production practice. Humic acid-based exchange agents have a relatively high removal rate of dyeing pollutants in the treatment of industrial wastewater, and the process is simple and low-cost.
We used sodium humate and aluminum salts as flocculants to treat printing and dyeing wastewater, and discussed the effects of the dosage of sodium humate and aluminum salts and the pH value of the wastewater on the COD removal rate. It was found that this method has high purification efficiency, which provides experimental basis for extending to industrial wastewater treatment, and is technically feasible.
At present, the treatment methods for electroplating wastewater containing heavy metal ions such as pd2+.Cu2+.Zn2+.Ni2+.Cr3+ are mainly divided into two categories: one is to convert metal ions in the solution into insoluble substances, such as chemical methods, electrolytic reduction methods, etc.; The other type is condensation separation without changing the chemical form of metal ions, such as ion exchange method and exchange fiber hair. However, chemical methods and electrolytic reduction methods produce a large amount of sludge during the treatment process and require further treatment. The ion exchange method has better treatment effects, but the cost of treating wastewater is higher. Therefore, how to produce low-priced ion exchangers is the key to large-scale use of the ion exchange method. Peat is low in price and contains humic acid, aliphatic, aromatic, methoxyquinone and other active groups, which can undergo ion exchange, complexation reaction and surface adsorption with heavy metal ions in water. Some technicians use peat as raw material Prepare low-cost humic acid resin for adsorption. Under dynamic conditions, through the adsorption and desorption of Pd2+, Cu2+, Zn2+, Ni2+, Cr3+ in water, the adsorption and desorption regeneration mechanism and the feasibility of humic acid resin in treating electroplating wastewater are discussed. property, opening up a new method for the comprehensive treatment of electroplating wastewater.
