Comparative Study For Emergency Treatment Of Phenols Micro-polluted Water By Several Chemicals

In the twenty-first century, as the level of industrialization raised in our country, the phenol pollution incidents are common, causing serious inconvenience to the people’s production and life and considerable damage to the natural environment of the local. What pharmacy can removal phenol, what about the effect of the removal of these agents, how to select pharmacy economically under a certain circumstances, what’s the impact of the processing costs of the water treatment plant in the incidents of phenol pollution,all of those should be considering.Potassium ferrate, Potassium permanganate, Powdered activated carbon are common used in removing phenol in water. Potassium permanganate and Powder activated carbon can not only remove phenol by themselves,but also when they are used in combination, they play a synergistic role in course of removing and the effect of this course is better than the effect linear superposition of courses of two pharmacies are used individually.Potassium ferrate is new multifunctional green water treatment agent, the reaction principle is similar to the Potassium permanganate’s, but it will not improve the chromaticity of the water and the content of Mn2+ in water.In the case of the higher concentration of phenol pollution, Potassium ferrate has broad prospects for it is used, because its better effect of removing phenol and without producing other pollution. The effect of course of removing phenol by using Potassium ferrate combined with Powdered activated carbon is not better the desired effect,maybe for the reason that the ferric hydroxide (Fe (OH)3) coming from Potassium ferrate did not play a role in strengthening adsorption powder of Powdered activated carbon.In the static test, configure phenol wastewater by ourselves. Dose pharmaceutical separatly at first, study each pharmacy’ dosage, temperature of solution, pH, reaction time and other factors which can affect the removal efficiency.Secondly, given environmental conditions, study the removal efficiency of two courses of the Potassium ferrate combined with Powdered activated carbon and Potassium permanganate combined with Powdered activated carbon. Finally, according to the results of the experiment combined with market analysis, get each estimates cost of pharmaceutical dosage ultimately, take the most economic agents option.(1)Compound phenol solution is 0.21mg/L as the original liquid. Testing remove efficiency of the temperature of the solution, pH, reaction time when change the dosage of potassium permanganate Alone.(2)Compound the same liquid. Testing remove efficiency of the temperature of the solution, pH, reaction time when change the dosage of potassium ferrate Alone.(3)Compound the same liquid. Testing remove efficiency of the temperature of the solution, pH, reaction time when change the dosage of powdered activated carbon Alone.(4)Compound the same liquid. Testing remove efficiency in different dosage of the potassium ferrate combine with powdered activated carbon when liquid in 18℃, pH=7.2 and certain time. Exploring its removal mechanism preliminarily and analyzing the reasons that cause this removal result.(5)Compound the same liquid. Testing remove efficiency in different dosage of the potassium permanganate combine with powdered activated carbon when liquid in 18℃,pH=7.2 and certain time. Exploring its removal mechanism preliminarily and analyzing the reasons that cause this removal result. The main conclusions:(1)In natural conditions(18℃, pH=7.2)and phenol pollutants concentration is 0.21 mg/L,three medicament achieve the best removal results as the following dosage:when the dosage of potassium ferrate is 8mg/L, it can achieved IVgrade Environmental Quality Standards for Surface Water; when the dosage of potassium permanganate is 3mg/L, it can achieved I grade Environmental Quality Standards for Surface Water; when the dosage of powdered activated carbon is 120mg/L, it can achieved V grade Environmental Quality Standards for Surface Water.(2)In natural conditions (18℃, pH=7.2)and phenol pollutants concentration is 0.21 mg/L, the potassium permanganate combine with powdered activated carbon oxidation flocculation adsorption,the best condition of remove phenol: when the dosage of powdered activated carbon is 120mg/L, the dosage of potassium ferrate is 8mg/L, it can achieved Ⅳgrade Environmental Quality Standards for Surface Water.(3)In the same natural conditions and pollutants solubility, the potassium permanganate combine with powdered activated carbon oxidation flocculation adsorption,the best condition of remove phenol:when the dosage of powdered activated carbon is 120mg/L, the dosage of potassium permanganate is lmg/L, it can achieved Ⅳ grade Environmental Quality Standards for Surface Water.(4)In the same natural conditions and pollutants solubility, when the dosage of potassium permanganate is 0.8mg/L, the dosage of powdered activated carbon is 30mg/L, this pharmacy achieve the optimal economic combination. Remove ratio of the phenol achieve 60.55%. in The pharmacy costs increase 0.614￥ per ton water. Total investment cost of equipment is 760000￥, the annual costs of water plant equipment is 58520 Y.(5)In the same natural conditions and pollutants solubility, when the dosage of potassium ferrate is lmg/L, the dosage of powdered activated carbon is 30mg/L, this pharmacy achieve the optimal economic combination. Remove ratio of the phenol achieve 52.94%. in The pharmacy costs increase 0.626￥ per ton water. Total investment cost of equipment is 760000￥, the annual costs of water plant equipment is 58520￥.(6)In normal conditions, water plant run normally can achieve standards, once phenol pollution event happen in bursts, taking into account the removal effect, economy, environmental and follow-up treatment, choosing potassium ferrate as water treatment pharmacy is more appropriate.