Synthesis of porous iron hydroxy phosphate from phosphate residue and its application as a Fenton-like catalyst for dye degradation  

作　　者：Weilin Guo Yin Cao Yi Zhang Lijun Wang Lingxue Kong 

机构地区：[1]School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 200240,China [2]Deakin University,Geelong,Institutefor Frontier Materials,Victoria 3216,Australia [3]Shanghai Innovation Institutefor Materials,Shanghai 200444,China

出　　处：《Journal of Environmental Sciences》2022年第2期307-319,共13页环境科学学报（英文版）

基　　金：supported by the Science and Technology Development Foundation of Pudong New Area (No. PKJ2014-Z03);Dawn Program of Shanghai (No. 09SG54 );Material Science and Engineering Key Subject of Shanghai Polytechnic University (No. XXKZD1601)。

摘　　要：Phosphate residue is a kind of hazardous solid waste and if not properly disposed of, could cause serious environmental contaminations. The abundant iron salt available in phosphate residue can be used to prepare photo-Fenton catalytic reagent for wastewater treatment. In this study, the phosphate residue was effectively purified by a hydrothermal recrystallization method, reaching an iron phosphate purity of 94.2%. The particles of iron phosphate were further processed with ball milling with their average size reduced from 19.4 to 1.6 μm. By hydrothermal crystallization of iron phosphate and thermal decomposition of oxalate precursor, porous iron hydroxy phosphate was prepared. The modified porous iron hydroxy phosphate(m-PIHP) of higher surface area with iron oxalate on its surface can degrade 98.87% of Rhodamine B in 15 min. Cyclic experiment showed that the catalyst still had a good catalytic activity after six cycles( > 40%). The X-ray photoelectron spectroscopy results showed that the iron oxalate complex on the catalyst surface decomposed to produce ferrous ions and accelerated the rate of · OH production. The current work demonstrated that the m-PIHP synthesized from phosphate residue and modified with iron oxalate can be used as an effective dye wastewater treatment agent.

关 键 词：Phosphate residue Porous iron hydroxy phosphate FENTON-LIKE ·OH 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程]