|
|
|
| Mechanisms of the effect of modified phosphogypsum on the change of heavy metal migration from sludge |
| DAI Qu-xiu1, HU Yao1, MA Li-ping1, YANG Jie1, GUO Zhi-ying2, AO Ran3, YANG Ren4, ZHENG Da-long5, XIE Long-gui1 |
1. School of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2. College of Biology and Agricultural Sciences, Honghe University, Honghe 661199, China;
3. Ecological and Environmental Engineering, College of Guizhou University for Nationalities, Guiyang 550025, China;
4. Honghe Prefecture Ecological Environment Elements Guarantee Service Center, Honghe 654400, China;
5. Zibo Vocational College, Zibo 255300, China |
|
|
|
|
Abstract This study utilized a mixture of potato residues and phosphogypsum waste residue to prepare a dual-modified material (D-MPR), which was then used to treat heavy metals in sludge. The preparation conditions of the dual-modified material were studied, along with its effects on the Zeta potential of the sludge, extracellular polymeric substances (EPS), and the migration of heavy metals; the ecological risk of heavy metals in the treated sludge was analyzed, and a heavy metal migration model was constructed. Experimental results showed that the waste residue (PR) underwent etherification modification at an alkalization temperature of 50°C with 2% hexadecyl trimethyl ammonium bromide (CTAB) by PR mass, at an etherification temperature of 50°C for 3hours; subsequently, by adding 1% PR of ammonium persulfate and 80% PR of acrylamide (AM), and reacting at 50°C for 3hours for graft modification, D-MPR was prepared. By adding D-MPR at a proportion of 12‰ of the dry solids (DS) amount of the sludge to treat heavy metals, it was found that compared with the original sludge, approximately 42.43% of non-stable Cd, 60.42% of non-stable Cr, 53.10% of non-stable Cu, 67.58% of non-stable Pb, 55.21% of non-stable Zn, 34.23% of non-stable Ni, and 74.68% of non-stable As were immobilized into the sludge cake, significantly reducing the migration risk and potential ecological risk coefficients of heavy metals in the sludge cake. Furthermore, the study found that the conversion rate of non-stable heavy metals decreased with an increase in LB-EPS and TB-EPS content, and increased with an increase in Zeta potential, thereby establishing a conversion model for non-stable heavy metals. This research provides a solid research foundation for the study of sludge heavy metal treatment with solid waste-based materials and has significant practical importance for the detoxification of sludge.
|
|
Received: 16 February 2024
|
|
|
|
|
|
[1] Zhou A, Yu S L, Deng S H, et al. Enrichment characteristics and environmental risk assessment of heavy metals in municipal sludge pyrolysis biochar [J]. Journal of the Energy Institute, 2023,111.
[2] Zhang X L, Li J, Yang W, et al. The combination of aerobic digestion and bioleaching for heavy metal removal from excess sludge [J]. Chemosphere, 2022,290.
[3] 金霞.水泥窑协同处置市政污泥过程的质量控制分析[J]. 新世纪水泥导报, 2023,29(3):25-28. Jin X. Quality control analysis of the process of co-processing municipal sludge in cement kiln [J]. New Century Cement Bulletin, 2023,29(3):25-28.
[4] 赵发敏,李兴杰,冯楠,等.污泥处理处置技术的应用研究及进展[J]. 有色冶金节能, 2021,37(6):50-54. Zhao F, LI X, Feng N, et al. Application research and progress of sludge treatment and disposal technology [J]. Energy saving in non-ferrous metallurgy, 2021,37(6):50-54.
[5] Zhu Q, Liang Y, Zhang Q, et al. Corrigendum to: "Biochar derived from hydrolysis of sewage sludge influences soil properties and heavy metals distributed in the soil" [J]. Journal of hazardous materials, 2022,443(Pt B):130323.
[6] Wei Y, Xu D H, Xu M X, et al. Hydrothermal liquefaction of municipal sludge and its products applications [J]. Science of the Total Environment, 2024,908.
[7] Qin J F, Zhang C C, Chen Z G, et al. Converting wastes to resource: Utilization of dewatered municipal sludge for calcium-based biochar adsorbent preparation and land application as a fertilizer [J]. Chemosphere, 2022,298.
[8] Li D, Jiang W, Ye Y Y, et al. A change in substance and microbial community structure during the co-composting of kitchen waste anaerobic digestion effluent, sewage sludge and Chinese medicine residue [J]. Science of the Total Environment, 2024,907.
[9] Ling W, Xing Y, Hong C, et al. Methods, mechanisms, models and tail gas emissions of convective drying in sludge: A review [J]. Science of the Total Environment, 2022,845.
[10] Yu L H, Zhang Y Y, Liu H L, et al. Comprehensive utilization of blast furnace slag, municipal sludge and kaolin clay in building brick manufacture: Crystalline transformation, morphology observation and property assessment [J]. Cement & Concrete Composites, 2024,145.
[11] Chu X, Ni Y, Wang X, et al. A win-win situation for environment and economy: Analysis of maximizing benefits in municipal sludge treatment plants [J]. Journal of Cleaner Production, 2023,419.
[12] Sun L, Li M, Liu B, et al. Machine learning for municipal sludge recycling by thermochemical conversion towards sustainability [J]. Bioresource technology, 2023,394:130254.
[13] Hao X D, Chen Q, Van Loosdrecht M C M, et al. Sustainable disposal of excess sludge: Incineration without anaerobic digestion [J]. Water Research, 2020,170.
[14] Cheng X Q, Wei C, Ke X, et al. Nationwide review of heavy metals in municipal sludge wastewater treatment plants in China: Sources, composition, accumulation and risk assessment [J]. Journal of Hazardous Materials, 2022,437.
[15] Rodriguez-Chueca J, Mediano A, Ormad M P, et al. Disinfection of wastewater effluents with the Fenton-like process induced by electromagnetic fields [J]. Water research, 2014:250-258.
[16] Yang J, Liu H, et al. Chemical thermodynamics analysis for in-situ gasification chemical looping combustion of lignite with phosphogypsum for syngas [J]. Applied thermal engineering: Design, processes, equipment, economics, 2017,112:516-522.
[17] Liu X W, Sun H N, Mu T H, et al. Preparation of cellulose nanofibers from potato residues by ultrasonication combined with high-pressure homogenization [J]. Food Chemistry, 2023,413.
[18] Ma Q Y, Ma Z Y, Wang W X, et al. The effects of enzymatic modification on the functional ingredient-Dietary fiber extracted from potato residue [J]. Lwt-Food Science and Technology, 2022,153.
[19] Soltaninejad A, Jazini M, Karimi K. Biorefinery for efficient xanthan gum, ethanol, and biogas production from potato crop residues [J]. Biomass & Bioenergy, 2022,158.
[20] 牛潇潇,王杰,王宁,等.超微粉碎对马铃薯渣理化性质和微观结构的影响[J]. 中国粮油学报, 2022,37(12):84-91. Niu X X, Wang J et al. Effects of ultrafine grinding on physicochemical properties and microstructure of potato pulp [J]. Chinese Journal of Grain and Oil, 2022,37(12):84-91.
[21] 梁瑞雪,侯艳,茹义博,等.马铃薯渣的降解及应用研究进展[J]. 食品工业, 2021,42(8):249-254. Liang R X, Hou Y, Ru Y B, et al. Research progress on the degradation and application of potato pulp [J]. Food industry, 2021,42(8):249-254.
[22] Hu C, He J. Potato proteins for technical applications: Nutrition, isolation, modification and functional properties -A review [J]. Food Science & Technology, 2024,91:103533.
[23] Zhang W J, Cao B D, Wang D S, et al. Influence of wastewater sludge treatment using combined peroxyacetic acid oxidation and inorganic coagulants re-flocculation on characteristics of extracellular polymeric substances (EPS) [J]. Water Research, 2016,88:728-739.
[24] Leong M L, Lee K M, Lai S O, et al. Sludge characteristics and performances of the sequencing batch reactor at different influent phenol concentrations [J]. Desalination, 2011,270(1-3):181-187.
[25] 黄显浪,李小明,杨麒.CTAB改性斜发沸石对剩余污泥的调理作用[J]. 环境工程学报, 2016,10(6):3193-3199. Huang X L, Li X M Yang Q. Conditioning effect of CTAB modified clinoptilolite on excess sludge [J]. Chinese Journal of Environmental Engineering, 2016,10(6):3193-3199.
[26] Terajima T, Moriizumi M. Temporal and spatial changes in dissolved organic carbon concentration and fluorescence intensity of fulvic acid like materials in mountainous headwater catchments [J]. Journal of Hydrology, 2013,479:1-12.
[27] Ou H, Gao N, Deng Y, et al. Mechanistic studies of Microcystic aeruginosa inactivation and degradation by UV-C irradiation and chlorination with poly-synchronous analyses [J]. DESALINATION, 2011,272(1-3):107-119.
[28] Zhang W J, Yang P, Yang X Y, et al. Insights into the respective role of acidification and oxidation for enhancing anaerobic digested sludge dewatering performance with Fenton process [J]. Bioresource Technology, 2015,181:247-253.
[29] Li X Y, Yang S F. Influence of loosely bound extracellular polymeric substances (EPS) on the flocculation, sedimentation and dewaterability of activated sludge [J]. Water Research, 2007,41(5):1022-1030.
[30] Jrgensen M K, Nierychlo M, Nielsen A H, et al. Unified understanding of physico-chemical properties of activated sludge and fouling propensity [J]. Water Research, 2017,120(1):117-132.
[31] Zhen G, Lu X, Su L, et al. Unraveling the catalyzing behaviors of different iron species (Fe2+ vs. Fe0) in activating persulfate-based oxidation process with implications to waste activated sludge dewaterability [J]. Water Research, 2018,134(1):101-114.
[32] Abel-Denee M, Abbott T, Eskicioglu C. Using mass struvite precipitation to remove recalcitrant nutrients and micropollutants from anaerobic digestion dewatering centrate [J]. Water Research, 2018, 132:292-300.
[33] Marin J A, Hernandez T, Garcia C. Bioremediation of oil refinery sludge by landfarming in semiarid conditions: Influence on soil microbial activity [J]. Environmental Research, 2005,98(2): 185-195.
[34] Lewkowska P, Cieslik B, Dymerski T, et al. Characteristics of odors emitted from municipal wastewater treatment plant and methods for their identification and deodorization techniques [J]. Environmental Research, 2016,151:573-586. |
|
|
|
