The Copper Balance of Cities

Material management faces a dual challenge: on the one hand satisfying large and increasing demands for goods and on the other hand accommodating wastes and emissions in sinks. Hence, the characterization of material flows and stocks is relevant for both improving resource efficiency and environmental protection. This article focuses on the urban scale, a dimension rarely investigated in past metal flow studies. We compare the copper (Cu) metabolism of two cities in different economic states, namely, Vienna (Europe) and Taipei (Asia). Substance flow analysis is used to calculate urban Cu balances in a comprehensive and transparent form. The main difference between Cu in the two cities appears to be the stock: Vienna seems close to saturation with 180 kilograms per capita (kg/cap) and a growth rate of 2% per year. In contrast, the Taipei stock of 30 kg/cap grows rapidly by 26% per year. Even though most Cu is recycled in both cities, bottom ash from municipal solid waste incineration represents an unused Cu potential accounting for 1% to 5% of annual demand. Nonpoint emissions are predominant; up to 50% of the loadings into the sewer system are from nonpoint sources. The results of this research are instrumental for the design of the Cu metabolism in each city. The outcomes serve as a base for identification and recovery of recyclables as well as for directing nonrecyclables to appropriate sinks, avoiding sensitive environmental pathways. The methodology applied is well suited for city benchmarking if sufficient data are available.

[1]  H. D. van der Gon,et al.  Brake wear from vehicles as an important source of diffuse copper pollution. , 2007, Water science and technology : a journal of the International Association on Water Pollution Research.

[2]  Saleem H. Ali.  Precious metals , 2015, Science.

[3]  Stephan Sedlaczek,et al.  Statistisches Jahrbuch der Stadt Wien , 1892 .

[4]  B. Bergbäck,et al.  Urban Metal Flows – A Case Study of Stockholm. Review and Conclusions , 2001 .

[5]  Shinichiro Nakamura,et al.  Waste Input-Output Analysis , 2009 .

[6]  Helmut Rechberger,et al.  Practical handbook of material flow analysis , 2003 .

[7]  I. O. Wallinder,et al.  Modelling and mapping of copper runoff for Europe. , 2007, Journal of environmental monitoring : JEM.

[8]  Guillaume Junqua,et al.  Environmental assessment of a territory: an overview of existing tools and methods. , 2012, Journal of environmental management.

[9]  Per Frändegård,et al.  Urban mining: hibernating copper stocks in local power grids , 2011 .

[10]  Xiaojun Zuo,et al.  Speciation distribution and mass balance of copper and zinc in urban rain, sediments, and road runoff , 2012, Environmental Science and Pollution Research.

[11]  Y. Kondo.  Waste Input-Output Analysis: Concepts and Application to Industrial Ecology , 2009 .

[12]  V. Rich.  Personal communication , 1989, Nature.

[13]  Robert J. Klee,et al.  Multilevel cycle of anthropogenic copper. , 2004, Environmental science & technology.

[14]  E M Harper,et al.  Metal lost and found: dissipative uses and releases of copper in the United States 1975-2000. , 2012, The Science of the total environment.

[15]  A. Demetriades,et al.  Mapping the chemical environment of urban areas , 2011 .

[16]  Jeroen C.J.M. van den Bergh,et al.  Constructing physical input-output tables for environmental modeling and accounting: Framework and illustrations , 2006 .

[17]  P. Brunner,et al.  Metabolism of the Anthroposphere , 1991 .

[18]  Fredrik von Malmborg,et al.  What can we learn from local substance flow analyses? The review of cadmium flows in Swedish municipalities , 2004 .

[19]  Patrick Geddes.  An Analysis of the Principles of Economics. , 1884 .

[20]  Jien,et al.  Baseline Concentrations of Toxic Elements in Metropolitan Park Soils of Taiwan , 2009 .

[21]  A. Demetriades,et al.  Urban geochemical mapping: a review of case studies in this volume , 2011 .

[22]  David S T Hjortenkrans,et al.  Metal emissions from brake linings and tires: case studies of Stockholm, Sweden 1995/1998 and 2005. , 2007, Environmental science & technology.

[23]  Bo Bergbäck,et al.  Century Perspective of Heavy Metal Use in Urban Areas. A Case Study in Stockholm , 2001 .

[24]  P. Brunner,et al.  DIE BESTIMMUNG VON STOFFLUSSEN IM WASSERHAUSHALT EINER REGION , 1992 .

[25]  Nan Li,et al.  World Population Prospects, the 2010 Revision: Estimation and projection methodology , 2011 .

[26]  Takashi Kameya,et al.  A preliminary categorization of end-of-life electrical and electronic equipment as secondary metal resources. , 2011, Waste management.

[27]  Chand Attar,et al.  Economic planning and development , 1990 .

[28]  Gregory A. Keoleian,et al.  Industrial ecology of the automobile : a life cycle perspective , 1997 .

[29]  M. Ivimey.  Annual report , 1958, IRE Transactions on Engineering Writing and Speech.

[30]  Xiangdong Li,et al.  Urban environmental geochemistry of trace metals. , 2006, Environmental pollution.

[31]  C. Makropoulos,et al.  Diffuse sources of heavy metals entering an urban wastewater catchment. , 2006, Chemosphere.

[32]  L. Sörme,et al.  Sources of heavy metals in urban wastewater in Stockholm. , 2002, The Science of the total environment.

[33]  N. Bukowiecki,et al.  Quantitative analysis of heavy metals in automotive brake linings: a comparison between wet-chemistry based analysis and in-situ screening with a handheld X-ray fluorescence spectrometer. , 2010, Analytica chimica acta.

[34]  Bo Bergbäck,et al.  Goods in the Anthroposphere as a Metal Emission Source A Case Study of Stockholm, Sweden , 2001 .

[35]  E Forssberg,et al.  An overview of recovery of metals from slags. , 2003, Waste management.

[36]  Der Vorstand,et al.  Geschäftsbericht , 1909, Mai 1909.

[37]  O. Haag,et al.  Precious metals and rare earth elements in municipal solid waste--sources and fate in a Swiss incineration plant. , 2013, Waste management.

[38]  Helmut Rechberger,et al.  The contemporary European copper cycle: waste management subsystem , 2002 .

[39]  P. Rem,et al.  Precious Metals in Municipal Solid Waste Incineration Bottom Ash , 2009 .

[40]  Paul H. Brunner,et al.  Material Balance of a Construction Waste Sorting Plant , 1993 .

[41]  D. Purves.  Contamination of Urban Garden Soils with Copper and Boron , 1966, Nature.

[42]  Paul H. Brunner,et al.  Metabolism of the Anthroposphere: Analysis, Evaluation, Design , 2012 .

[43]  D. van Beers,et al.  Spatial characterisation of multi-level in-use copper and zinc stocks in Australia , 2007 .

[44]  Yasushi Kondo,et al.  The Waste Input‐Output Approach to Materials Flow Analysis , 2007 .

[45]  Helmut Rechberger,et al.  The contemporary European copper cycle: The characterization of technological copper cycles , 2002 .

[46]  Rosemary Thorp,et al.  Review and Conclusions , 1987 .

[47]  Claudia M Agudelo-Vera,et al.  Resource management as a key factor for sustainable urban planning. , 2011, Journal of environmental management.

[48]  P. Arlien‐Søborg,et al.  Science of the Total Environment , 2018 .

[49]  Jenna Jambeck,et al.  Heavy metals in recovered fines from construction and demolition debris recycling facilities in Florida. , 2004, The Science of the total environment.

[50]  Morten Winther,et al.  Heavy metal emissions for Danish road transport , 2010 .

[51]  L. Sörme.  Urban heavy metals : Stocks and flows , 2003 .

[52]  I. Hölzle.  Vom Deponierückbau bis zum landfill mining – eine Synthese internationaler Untersuchungen , 2010 .

[53]  T. Graedel,et al.  Anthropogenic cycles of the elements: a critical review. , 2012, Environmental science & technology.

[54]  Bo Bergbäck,et al.  Utility of Substance Stock and Flow Studies , 2009 .

[55]  P. Marcotullio,et al.  The Impact of Urbanization on Soils , 2008 .

[56]  Helmut Rechberger,et al.  The contemporary European copper cycle: 1 year stocks and flows , 2002 .

[57]  Zengwei Yuan,et al.  Estimation of Copper In‐use Stocks in Nanjing, China , 2012 .

[58]  Thomas E. Graedel,et al.  The magnitude and spatial distribution of in-use copper stocks in Cape Town, South Africa : research article , 2003 .

[59]  Martin Ruhrberg,et al.  Assessing the recycling efficiency of copper from end-of-life products in Western Europe , 2006 .

[60]  L. Sörme,et al.  Data Vagueness and Uncertainties in Urban Heavy-Metal Data Collection , 2001 .

[61]  Bo Bergbäck.  Industrial Metabolism. The Emerging Landscape of Heavy Metal Immission in Sweden , 1992 .