Applied Mechanics and Materials Vol. 768

Abstract: Artificial impermeable liner is the commonly used engineering technology method to prevent the Municipal Solid Waste (MSW) landfill leachate from polluting groundwater. The domestic and foreign researcher have discovered that the landfill impermeable liner was easy to have leaks during artificial liner laying down because of mechanical or the artificial mal-operation. The integrity test of impermeable liner for landfill began at the year of 2008. So a large number of historical landfill (construction completed before 2008) had become the pollution sources to local ecosystem because of the impermeable liner leakage. This article discussed the present situation of historical landfill leakage pollution, and propose technical and administrative measures to control those pollution in China.

Abstract: The article introduces the detailed standard and existing obstacles in classifying municipal living waste in China, and analyzes the industry chain of recycling municipal living waste. Then the article proposes the measures for promoting detailed classification, which is significant to efficient disposal and utilization for municipal living waste, as well as circular economy.

Abstract: With rapid industrialization, continuous economic development, increasing population and living standards, the amount of general industrial solid waste generated in Kunming has increased continuously from 2001 to 2011. In 2013, the total general industrial solid waste generation was 33.19 million tons, deceased by 9.59% over 2011. The disposal and comprehensive use amount of general industrial solid waste in Kunming has increased dramatically from 2001 to 2013, and the disposal and comprehensive use rate of industrial solid waste increased fast from 64.39% in 2002 to 97.68% in 2013,but the comprehensive use rate of general industrial solid waste has not increased largely. Kunming’s general industrial solid waste treatment capacity has obvious difference from generation capacity, the produced industrial solid waste each year has the utilization of nearly 40%, with about 60% of the solid waste we cannot use. The disposal and comprehensive use rate of general industrial solid waste is different in different region of Kunming. Although the resource utilization of general industrial solid waste has made some progress in Kunming, the technical level is still very low compared with developed region, specially, the comprehensive utilization rate of phosphogypsum and tailings was not beyond 17% in 2013. Thereafter, much still can be done to improve the treatment and disposal of industrial solid waste in Kunming.

Abstract: The paper analyses the theory and practice about the construction waste recycling in a meticulous and deep going way based on reverse logistics combining with present social development circulation economy current situation,then brings forward the operation pattern about the construction waste recycling based on reverse logistics,on the basis of household electrical appliances and electronic products recycling reverse logistics model, this paper put forward the system model of the disposal of construction waste based on the recovery of the third party reverse logistics service providers.Also,the paper makes an explanation about the problem and measure into practice,and provides theory and practice for the construction waste recycling.

Abstract: Soil nutrient of different utilization types in coal mining subsidence area had been analyzed. Results showed that: In greenhouse reclamation area, the content of organic matter and elements was higher, the pH-value was slightly high, followed by was cropland reclamation area; but in forest reclamation area (Include new reclamation area and intercropping reclamation area), as the reclamation and cropping were prolonged, soil fertility was improved.

Abstract: The different interests of the two populations towards recyclable waste led to a different scenario: in Romania all types of WEEE have been collected since its entrance into the EU; in China the ‘‘interest’’ in recycling is typically related to large household appliances, with a secondary role are the regulations covering three major issues, namely, take-back issues, controls on hazardous substances in WEEE and the assurance of good environmental management in WEEE plants. Keywords: WEEE, Collection, Recycling, Regulation, Consumption

Abstract: There is an increasing concern about the threat of Waste Electrical and Electronic Equipments (WEEE) generating in China. The Chinese government had made a series of regulations and policies to address this problem. However, these practices are more focusing on the environmental protection rather than the resource utilization. Since WEEE is also a valuable kind of renewable resource, this essay will try to understand the current situation of WEEE recycling and resource utilization technologies and equipments. In the year of 2014, China Household Electric Appliance Research Institute conducted a questioner research targeting the 91 subsidy funded companies, which received 50 responses. By the comparison of previous studies of this issue and the analysis of the data collected, resource utilization situation of the industry can be addressed. This essay will also explore an evaluation model to assess the resource utilization standard of WEEE recycling. Based on the analysis, nine outcome criteria and evaluation strategies are formed to judge the resource utilization standards of WEEE recycling companies. This evaluation model will target all the life cycle of WEEE, and include criteria such as recycling technology and equipment, management standard, and resource utilization level.

Abstract: Mongolia is a consumer of e-products and their parts are imported from abroad. Currently, e-waste represents the biggest and fastest growing manufacturing waste. The objectives of this study are collecting and analyzing data from statistical reports of Mongolia and comparing them to other countries, and recommending an infrastructure of e-waste management in the existing legal environment. Thereby, all data was published by governmental entities and central statistical bureaus. An e-product, such as computers and TV’s are leading by their imported quantity in Mongolia. The e-waste is becoming one of the most challenging environmental issues because of its tendency to be incompatible for reuse and recycling. However, up to now, a main portion of e-waste is utilized through re-using (45.1%) and disposing (31.9%), and fewer amounts are recycled (23.0%) as was estimated in a study supported with the Japanese International Cooperation Agency (JICA), Japan, 2010. In conclusion, Mongolia needs to establish e-waste management by implementing core activities such as adapting experiences from high developed countries, harmonizing the corporation between in governmental entities and supporting business activities of recyclers and retailers. The green development policy was approved by the Mongolian Parliament in June, 2014. According to this new policy, it is needed to be applied recycling incentives to raise the environmental awareness of all stakeholders.

Abstract: Rapid industrial development and urbanization processes that occurred in China over the past 30 years has increased dramatically the consumption of natural resources and raw materials, thus exacerbating the human pressure on environmental ecosystems. An amount of damaged mountains and contaminated sites aroused rapidly so that ecological remediation for damaged mountains has become an urgent environmental issue in China. In this study, three points of damaged mountains in Jinan were chose to measure the combined approaches of ecological remediation. Phytoremediation for ecological restoration was employed under the assistance of lots of structural engineering measures. The obtained results indicated that a feasible solution always exists to solve the ecological remediation for the damaged mountains. Meanwhile, the approaches of remediation should fully consider their applicability to fit for the local situations. The remediation practice in Jinan can provide a successful case for other damaged mountains or contaminated sites.

Abstract: Plastic bag pollution is a growing global environmental concern. Several countries have recently approved bans on the use and distribution of plastic bags. In the USA, 22 of the 50 states have adopted multiple city/county ordinances. Most of these bans are introduced in coastal cities/counties. The local drivers, i.e. economy, geography, benefit, life-style, cost of living, and educational attainment, all impact the level and commitment to plastic bag bans. Currently, battles between support and opposition to these bans are typically financially driven; jobs and environmental health being main impact categories. This paper identifies several problems affecting the complete adoption of plastic bag bans in the USA, and gives some corresponding strategies to enhance the effectiveness and success of policy implementation.