Abstract
Nine public school playgrounds across Owerri metropolis were investigated for metal fractions for three years (2012, 2013 and 2014) in order to assess bioavailability, average daily dose (ADD) and risk assessment code (RAC) of five heavy metals. A six steps sequential extraction procedure was used to quantify metal fractions with A ANALYST 400 Perkin Elmer AAS. Data of metal concentration was subjected to models and results revealed interesting information that could aid in decision making concerning children playground safety. Significant (p > 0.05) amounts of Zn, Co and Cu were found in the bioavailable fractions in all playgrounds for both seasons. Mean Percent bioavailability in 2012 ranged from Co (9.4) to Zn (28.11) though maximum bioavailability was observed for Mn (55) and minimum for Cu (3). In 2013 bioavailability ranged from Zn (36) to Ni (40.2) while maximum bioavailability was observed for Cu (69) and minimum for Mn (20). In 2014 it ranged from Co (58.6) to Mn (61.1) with maximum bioavailability for Cu (80) and minimum for Cu (21). Bioavailability of these metals in dry and rainy seasons followed the order; Zn > Ni > Cu > Mn > Co. Categorizing bioavailability the order was Residual > Non-bioavailable > Bioavailable. Average daily dose (ADD) showed that exposure to metal-contaminated soil by ingestion were most prominent for Zn and Mn but high ADD values were recorded in 2014 with Zn (1583.7 mg/Kg/day) as the highest. In 2012, values of RAC showed that only Zn (50) at CSO was high whereas almost all playgrounds showed RAC above 50. There was a general increase in RAC from 2012 to 2014. Thus, these metals may be readily bioavailable to children and in the long run constitute health problems for children who use these playgrounds regularly.
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References
Chen YC (1994) A 6-years follow up of behavior and activities disorder in the Taiwan YU-Cheng Children. Am J Public Health 84:415–421
America Academy of Pediatrics, AAP (2003) Children’s health and the environment: a global perspective. A source guide for the health sector, WHO
Verla EN, Horsfall MJ, Spiff AI (2015) Physico chemical characterization of playgrounds soils of public schools in Owerri Metropolis, Imo State, Nigeria. Int J Innov Appl Stud 13(2):472–480
Camille H, Zhongwen W, Hongquan Z, Elena K, Li FL, Stephan G, Chris LX (2005) Chromium on the hands of children after playing in playgrounds built from chromate copper arsenate treated wood (CCA). America and China. Int J Epidemiol 23:984–990
Newman MC, Unger MA (2003) Fundamentals of Ecotoxicology. CRC Press/Lewis Publishers, Boca Raton, FL, p 72
Horsfall MJ, Spiff AI (2013) Principles of environmental pollution, toxicology and waste management. Onyoma Research Publishers, Port Harcourt, p 16
Newman MC, Clement WH (2008) Ecotoxicology—a comprehensive treatment. Taylor and Francis Group 80:321–344
Verla EN, Verla AW, Osisi AF, Peter NO, Enyoh CE (2019) Finding a relationship between Mobility factors of selected heavy metals and soil particle size in soils from children’s playgrounds. Environ Monit Assess 191:742. https://doi.org/10.1007/s10661-019-7937-7
Ottosen LM, Villumsen A (2006) High Cu and Cd pollution in sediments from Sisimiut, Greenland. Adsorption to organic matter and fine particles. Environ Chem Lett 4:195–199
Osakwe SA (2010) Chemical speciation and mobility of some heavy metals in soils around automobile waste dumpsites in Northern part of Niger Delta South Central Nigeria. J Appl Sci Environ Manag 14(4):123–130
Verla EN, Verla AW, Ugwulor L (2015) seasonal variation of heavy metals in playgrounds of public schools within Owerri Metropolis, Imo State, Nigeria. Int Lett Chem Phys Astronom 50:61–70
Verla EN, Spiff AI, Horsfall MJ (2015) A preliminary survey of heavy metals concentrations in children playground within Owerri Metropolis, Imo State. Niger Res J Chem Sci 5(11):1–6
Wang WX, Rainbow PS (2005) Influence of metal exposure history on trace metal uptake and accumulation by marine invertebrates. Ecotoxicol Environ Saf 61:145–159
Wong JWC, Mak NK (1997) Heavy metal pollution in children playgrounds in Hong Kong and its health implications. Environ Technol 18:109–115
Mielke W (1999) The Urban environment and children’s health: soils as an integrator of lead, zinc and cadmium in New Orleans, Louisiana, USA. Environ Res 81(2):117–129
Lam KC, Ng SL, Hui WC, Chan PK (2005) Environmental quality of urban parks and open spaces in Hong Kong. Environ Monit Assess 111:55–73
Ng SL (2003) Heavy metal contents and magnetic properties of playground dust in Hongkong. Environ Monit Assess 89:221–232
Ljung K, Schinus O, Otabbong E (2006) Metal in soil of children’s Urban environment in the small northern European city of Uppsala. Sci Total Environ 366(2–3):749–759
De-Miguel E, Iribarren I, Chacon E, Ordonez A, Charlesworth S (2007) Risk-based evaluation of the exposure of children to trace elements in playgrounds in Madrid (Spain). Chemosphere 66:505–513
Aliyu M, Zakari YI, Ibeanu IGE, Akpa TC (2009) Evaluation of lead concentration levels of children’s playground in Kaduna state schools. J Pure Appl Sci 2(2):105–109
Popoola OE, Bamgbose O, Okonkwo O, Arowolo OJ, Odukoya TA, Popoola AO (2012) Heavy metals content in playground topsoil of some public primary schools in metropolitan Lagos, Nigeria. Res J Environ Earth Sci 4(4):434–439
Verla AW, Verla EN (2017) Risk associated with heavy metal concentrations in children playground soils of Owerri metropolis, Imo state. Niger World News Nat Sci 10:49–69
Enyoh CE, Ihionu EA, Verla AW, Ebosie NP (2017) Physicochemical properties of palm oil and soil from Ihube Community, Okigwe, Imo State, Nigeria. Int Lett Nat Sci 62:35–49
Horsfall MJ (2011) Chemistry and heavy metals are Janus faced. An inaugural lecture series no. 81st at department of pure and Industrial chemistry. University of Port Harcourt, November 2011. 17.
Ibe FC, Isiukwu BO, Enyoh CE (2017) Trace metals analysis of soil and edible plant leaves from abandoned municipal waste dumpsite in Owerri, Imo state, Nigeria. World News Nat Sci 13:27–42
Okorokwo NE, Igwe JC, Onwuchekwe EC (2005) Risk and health implication of polluted soils for crops production. Afr J Biotech 4(13):1521–1524
Surech VSR (2008) Metals and apoptosis: recent development. J Trace Elem Med Biol 22:262–284
Tovar-Sanchez A, Sanudo-Wilhelmy SA, Flegal AR (2004) Temporal and spatial variations in the biogeochemical cycling of cobalt in two urban estuaries: Hudson River Estuary and San Francisco Bay. Estuar Coast Shelf Sci 60:717–728
Ikeda M, Zhang ZW, Shimbo S, Watanabe T, Nakatsuka H, Moon CS, Matsuda-Inoguchi N, Higashikawa K (2000) Urban population exposure to lead and cadmium in east and south-east Asia. Sci Total Environ 249:373–384
Orajaka SO (1975) Geology. In: Nigeria in maps: Eastern States. In: Ofomata GEK (eds) Ethiope Publishers. Benin City, pp 5–7
Nuhu GO (2009) Geology and mineral resources of Nigeria: Part of the lecture notes in earth sciences book series. LNEARTH 120:1–120. https://doi.org/10.1007/978-3-540-92685-6
Ofoegbu CO (1985) A review of the geology of the Benue through. Niger J Afr Earth Sci 3(3):283–291
Donatus EOA, Osodeke VE, Ukpong MI, Osisi AF (2018) Chemistry and mineralogy of soils derived from different parent materials in Southeastern Nigeria 23(3):1–16
Onweremadu EU, Amaechi JU, Ndukwu BN (2011) Vertical distribution of cadmium and lead on soils affected by metropolitan refuse disposal in Owerri, Southeastern Nigeria. Iran J Energy Environ 2(1):62–67
Onweremadu EU, Eshett ET, Osuji GE (2007) Temporal variability of selected heavy metals in automobile soils. Int J Environ Sci Technol 4(1):35–41
Mohr HO (1971) Effect of Garbage Seawage slugde compost on the heavy metal content of Vineyard Soils, Grapevines. Organs Must Weinberg Keller 26:335–344
Verla EN, Verla AW, Horsfall MJ, Spiff AI (2015) Assessment of some heavy metal in childrens playgrounds in Owerri metropolis, Imo state, Nigeria. J Chem Soc Nigeria 50:44–50
Enyoh CE, Verla AW, Egejuru NJ (2018) pH variations and chemometric assessment of borehole water in Orji, Owerri Imo State, Nigeria. J Environ Anal Chem 5:1–9
Zhu W, Bian B, Li L (2008) Heavy metal contamination of road—deposition sediment in a medium size city of china. Environ Monit Assess 147(1–3):171–181. https://doi.org/10.1007/s10661-007-0108-2
Tessier A, Campbell PGC, Bisson N (1979) Sequential extraction procedure for the speciation of particulate trace metals. Anal Chem 51(7):844–861
Mbah CN, Anikwe MAN (2010) Variation in heavy metal contents on roadside soils along a major express way in South east Nigeria. N Y Sci J 3(10):103–107
Rodriguez-Proteau I.R, Grant RL (2005) Toxicity evaluation and human health risk assessment of surface and ground water contaminated by recycled hazardous waste materials. Handb Environ Chem 5 Part F 2:133–189
Lansdown R (1986) Lead, intelligence attainment and behavior. In: Lansdown R, Yule W (eds) The lead debate. Croom Helm, London-Sydney, pp 235–270
Bi XH, Thomas GO, Jones KC, Qu WY, Sheng GY, Martin FL, Fu JM (2007) Exposure of electronics dismantling workers to polybrominatetd diphenyl ethers, polychlorinated biphenyls, and organochlorine pesticides in South China. Environ Sci Technol 41:5647–5653
UNICEF (1997) Childhood lead poisoning: information for advocacy and action. 3 UN Plaza, New York, NY 10017, USA
USEPA (1993) Reference dose (RfD): Description and use in health risk assessments, Background Document 1A, Integrated risk information system (IRIS); United States Environmental Protection Agency: Washington, DC; http://www.epa.gov/iris/rfd.htm.
Danielly PM, Monica RDC, Darcillo FB, Daniel FB (2015) Metal bioavailability and toxicity in freshwaters. Environ Chem Lett 13:69–87
Shaofeng WW, Youngfeng J, Shuyying W, XinW HW, Zhixi Z, Biingzhu L (2010) Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay. China J Environ Sci 22(1):23–31
Orisakwe OE, Nduka JK, Amadi CN, Dike DO, Bede O (2012) Heavy metals health risk assessment for population via consumption of food crops and fruits in Owerri, South Eastern, Nigeria. Chem Cent J 6:77–91
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This work is part of PhD thesis in the Department of Pure and Industrial Chemistry at University of Port Harcourt.
We express deep gratitude to those persons who assisted in various ways especially financial and moral support during the difficult moments of the work.
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Verla, E.N., Verla, A.W. & Enyoh, C.E. Bioavailability, Average Daily Dose and Risk of Heavy Metals in Soils from Children Playgrounds Within Owerri, Imo State, Nigeria. Chemistry Africa 3, 427–438 (2020). https://doi.org/10.1007/s42250-020-00124-9
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DOI: https://doi.org/10.1007/s42250-020-00124-9