Removal Of Heavy Metal Pb²⁺ Waste Water And Rhodamine B Dye Waste Water By Carbon Membranes

Along with the development of industry, environmental pollution has become more and more serious, quantities of industrial wastewater discharges into ocean directly or indirectly, making tremendous effect on marine environment. Effective control and reduction of pollutants in industrial wastewater in the ocean is extremely urgent. Conductive carbon membrane is a novel inorganic membrane with good thermal and chemical stability, good conductivity and mechanical strength, has attracted wide attention from researchers in recent years. In this paper, utilizing its conductivity we combine membrane separation technology with electrodynamics and electrochemical oxidation technology, detailed research on conductive carbon membrane and electric field synergy to treat pb2+and rhodamine B, as well as its anti-fouling ability in low electric field.In this paper, conductive carbon membrane is used to treat heavy metal Pb2+, Effects of pore structure properties, wriggles pumps speed, initial concentration, electric field intensity and pH are investigated. The results indicate that the smaller the pore size of carbon membrane, the membrane’s anti-polluting is stronger along with the shorter time reach to the stable flux; The stable flux increases with the porosity. Permeation flux increases with peristaltic pump speed, and decreases with initial concentration. The flux of carbon membrane was significantly improved in the electric field, removal of lead ions up to98.4%. Pb(OH)2in low pH forms alternative structure that has little effect on the permeation flux.Use the carbon membrane with the same pore structure to treat rhodamine B waste water, Effects of electric field intensity, wriggles pumps speed, initial concentration, electrolyte concentration and pH are investigated. The results indicate that with the increase of electric-field strength and electrical conductivity, the flux increased more dramatically, when the electric field strength is0.24v/cm, the removal efficiency remained at93.1%after10h reaction. Increased electrolyte has positive effect on membrane permeability, but adding too many electrolytes will hinder the formation of hydroxyl radicals thus affect the degradation of rhodamine B. The degradation was most satisfactory in the acidic condition.