GB/T 40611-2021 English PDF

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GB/T 40611-2021: Plastics - Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface - Method by measuring the oxygen demand in closed respirometer
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40611-2021	184	Add to Cart	3 days	Plastics - Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface - Method by measuring the oxygen demand in closed respirometer	Valid

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Basic data

Standard ID: GB/T 40611-2021 (GB/T40611-2021)
Description (Translated English): Plastics - Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface - Method by measuring the oxygen demand in closed respirometer
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G31
Word Count Estimation: 10,161
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40611-2021: Plastics - Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface - Method by measuring the oxygen demand in closed respirometer

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Plastics - Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sandy sediment interface - Method by measuring the oxygen demand in closed respirometer ICS 83.080.01 CCSG31 National Standards of People's Republic of China Plastic seawater sandy sediment interface non-floating plastic Determination of the final aerobic biodegradability of materials By measuring the oxygen consumption in a closed respirometer (ISO 18830.2016, IDT) Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. The translation method used in this document is equivalent to ISO 18830.2016 ``Final requirements for non-floating plastic materials at the interface of plastic seawater sandy sediments. The oxygen biodegradability is determined by the method of measuring oxygen consumption in a closed respirometer. The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows. ---GB/T 32116-2015 Determination of total organic carbon (TOC) in circulating cooling water (ISO 8245.1999, NEQ) Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Standardization Technical Committee for Bio-based Materials and Degradable Products. Drafting organizations of this document. Beijing Technology and Business University, Tongcheng Chemical (China) Co., Ltd., Bengbu Tiancheng Packaging Technology Co., Ltd., Ningbo Jialian Technology Co., Ltd., Chongqing Lianfa Plastic Technology Co., Ltd., China Shenhua Coal-to-Liquid Chemical Co., Ltd., Anhui Fengyuan Biological New Materials Co., Ltd., National Plastic Products Quality Supervision and Inspection Center (Beijing), Shenzhen Wandajie Environmental New Materials Co., Ltd., Shenzhen Zhengwang Environmental Protection New Material Co., Ltd., Guangdong Chongxi Environmental Protection Technology Co., Ltd., Anhui Huachi Plastic Industry Co., Ltd., Anhui Xuelang Biological Technology Co., Ltd., Anhui Fengyuan Fermentation Technology Engineering Research Co., Ltd., Anhui Fengyuan Biochemical Co., Ltd., Anhui Fengyuan Biofiber Co., Ltd., Sichuan University, Anhui Hengxin Environmental New Material Co., Ltd., Yangzhou Huitong Technology Co., Ltd., Lanzhou Xin Yinhuan Rubber Products Co., Ltd., Zhongcheng Huadao Group Co., Ltd., Anhui Zhongcheng Huadao Plastic Co., Ltd. The main drafters of this document. Fu Ye, Zhou Yingxin, Wu Gang, Zhao Yanchao, Wang Xiong, Zhou Yigang, Li Shuzhen, Zhou Jiushou, Wen Liang, Yin Tian, Feng Shen, Feng Jie, Wei Wenchang, Zhang Jianhong, Wei Jie, Wang Chunqiu, Wan Yuqing, Ji Chuanxia, Hu Fugui, Yu Jianmei, Yan Deping, Shen Kunliang, Zhang Jiangang, Qin Wensheng, Ai Rong, Gao Ting.

Introduction

Products made of biodegradable plastics are designed to be recycled through organic cycles in composting plants or anaerobic digesters. Not because These products are biodegradable and are considered to be freely discarded in the environment. This is undesirable, these products should be recycled and reused use. However, the test methods for determining the degree and rate of biodegradation of plastics in natural environments (such as soil or marine environments) are worthy of attention. It can better describe the degradation behavior of plastics in these specific environments. In fact, some products used in the ocean are made of plastic (e.g. Fishing gear), these products are sometimes lost or intentionally placed in the marine environment. The properties of biodegradable plastic materials can be Characterized by test methods, these methods can quantitatively evaluate the biodegradability of plastics exposed to marine sediments and seawater. Plastic products are directly discarded or flow into pelagic areas (free waters) with fresh water. The effects of damage may sink to the coastal zone and reach the surface of the seafloor. Many biodegradable plastics have a density greater than 1, so they tend to sink. From From the surface (the interface with the seawater) to the deep layer, the environment of the sediments changes from aerobic to anoxic to anaerobic, showing a sharply changing oxygen gradient. Plastic seawater sandy sediment interface non-floating plastic Determination of the final aerobic biodegradability of materials By measuring the oxygen consumption in a closed respirometer

1 Scope

This document describes a test method that measures the oxygen consumption in a closed respirometer to determine whether plastic materials are at the junction of sea water and the seabed. The degree and rate of decomposition of aerobic organisms on the ocean sandy sediments. This test method is to simulate the habitat environment of different seawater sedimentation areas in the ocean under laboratory conditions, such as when the sun hits the bottom of the sea. The benthic zone (light zone) is called the coastal zone in marine science. The determination of the biodegradation of plastic materials and other solid materials buried in marine sediments is outside the scope of this document. The conditions described in this document may be inconsistent with the optimal conditions for maximum biodegradation.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 19276.1-2003 The determination of the final aerobic biodegradability of the materials in the aqueous culture medium is measured by the airtight respirometer Method of intermediate oxygen demand (ISO 14851.1999, IDT) ISO 8245 Water Quality Guidelines for Determination of Total Organic Carbon (TOC) and Dissolved Organic Carbon (DOC) (Waterquality- Guidelinesforthedeterminationoftotalorganiccarbon(TOC)anddissolvedorganiccarbon(DOC)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Biochemical oxygen demand biochemicaloxygendemand BOD Under certain conditions, the mass concentration of dissolved oxygen consumed by compounds or organics in water due to aerobic biological oxidation. Note. Expressed in milligrams of oxygen absorbed per milligram or gram of compound. 3.2 Theoretical oxygen demand theoretical oxygen demand ThOD The theoretical maximum value of oxygen required for complete oxidation of the compound can be calculated from the molecular formula. Note. Expressed in milligrams of oxygen absorbed per milligram or per gram of test material (mgO2/mg test material or mgO2/g test material). 3.3 Total organic carbon TOC The total carbon content of organic matter dissolved or suspended in water. ......

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