Study on Key Factors of Adsorption of Phosphorus by Steel Slag Filter Based on Response Surface Method

Abstract

Excessive phosphorus emission is one of the important reasons for the eutrophication of water. At the same time, phosphorus is a significant mineral resource. In this paper, the response surface method is used to study the key influencing factors of phosphorus removal by steel slag filter and its action. Four factors affecting the dosage, initial pH, reaction time and calcium-phosphorus molar ratio were selected. The phosphorus removal was used as the response value. The interaction between various factors was established by Box-Behnken response surface analysis. The optimal conditions were determined by equation regression analysis: dosage = 2 cm3; initial pH = 7; molar ratio of calcium to phosphorus was 2:1; reaction time = 2 h.

Optimization of Preparation Conditions of Modified Oyster Shell Powder/Ce-N-TiO<sub>2</sub> by Response Surface Methodology (RSM)

“…The adsorbent may adsorb a large number of organic pollutant molecules, thus facilitating the reaction between the organic molecules and the active radicals formed on the TiO 2 surface, forming an adsorption-catalysis photodegradation pathway. Currently, the use of waste materials to prepare new, inexpensive, "green" adsorbents is a hot research topic [14] [15], such as quartz particles, fly ash, zeolite, and other natural materials and waste residue-based adsorbent materials [16] [17] [18] [19]. However, there are not many reports on the preparation of composite photocatalysts with adsorption-photocatalytic synergy by combining the above-mentioned types of adsorbent materials with modified TiO 2 .…”