Applied Research Based On Activated Carbon Fiber In Water Treatment

Nowadays, the safety of drinking water due to heavy metal ion pollution and the disinfection deficiency of water treatment process technology has been paid more attention. It is an urgent problem that effectively reducing heavy metal ions and harmful substances in drinking water to ensure the security of water. Activated carbon fibers (ACF) has been widely used in all kinds of fields because of its porous structure and larger specific surface area, higher absorption rate and performance. Combining the defects of water treatment and heavy metal ions processing technology, this work studied the adsorption performance of ACF, and developed a security and environmental activated carbon filter and a low cost, high efficiency and convenient heavy metal ions processing technology, which promoted application of activated carbon fibers in water treatment.This thesis mainly included the following two aspects:1. Study of a Novel Environmental Filter of water purifier and it's regenerated performance testing. Activated carbon filter was treated by natural binder paper pulp and examined the physical performance and adsorption properties of ClO- in tap water. In addition, adsorption performance and physical properties of two regenerative filter to ClO- also were investigated, which were waste filter after smashing to forming filter and HNO3 and glycine modification filter. The results showed that, physical properties of using the activated carbon filter, pulp molding renewable filter can meet the requirements of practical application.25,50, 100% of the activated carbon filter could effectively treated with 2mg·L-1 to CIO- solution, and the processing capacity were 270,330,420 L, respectively. The processing capacity of heating method treating renewable filter was 92.9% for the original filter, and processing capacity of the chemical method handling renewable filter was 85.7% for former filter. ACF filter adsorption performance was stable at 10-50℃. Activated carbon filter processing capacity of 25,50,100% HNO3 modified ACF were 89,91,93% filter,respectively. Cu2+ adsorption of ACF and glycine modification ACF conformed to Langmuir model. The processing capacity to ClO- of The glycine modification filter was equivalent with the original filter, and adsorption capacity of the Cu2+ was 67.51mg·g-1.2. Study on treating heavy metal ion of industry wastewater with the process of F1-ACF two-steps. This paper designed F1 reagent precipitation and ACF adsorption two-step dealt with heavy metal ions, and studied the F1-ACF two-steps technological feasibility. The primary treatment was using Fl reagent to Cu2+, Pb+, Zn+, Cd+, this work tested the unmodified ACF and H2SO4, H2O2, NaOH modification of ACF to Cu2+, Pb2+, Zn2+, Cd2+ adsorption ability of F1 reagent pretreatment, also examined to handle renewable ACF and the results of the feasibility of pilot scale. The results showed that the best adsorption ratio of F1 reagents and heavy metal ions was 1:1, remove rate of H2O2 modified activated carbon fiber (ACF) to heavy metal ions was largest, followed H2SO4 modified activated carbon fiber, and NaOH modified activated carbon fiber basically no influence. The heavy metal ions remove rate of process system by enlarging 10 times exceeds 96%. In addition, COD was increased to O.61mg·L-1 after the two-step process. When ACF was regenerated, surface adsorption of F1 reagent was fully carbonized, and F1-regeneration ACF to Pb2+ remove rate was more than 95%. F1-ACF two steps method can effectively and selectively deal with heavy metal ions, which was low investment cost in sewage disposal, and can realize the heavy metal ions recovery, and not produce secondary pollution by simple operation. Therefore, F1-ACF two steps method is worthy to be widely popularized selective.