The aim of this review is to introduce the topic of Green Chemistry, function of green chemistry in a redox reaction and key Green Chemistry principles that scientists and engineers can use to move towards sustainable development.

Understand and provide a detailed discussion of the importance of green chemistry

and sustainable chemistry in redox reactions and environmentally friendly technologies for sustainable development.

Environmental issues inside the past were considered as part of the economic system and the rapid exploitation of natural sources. It took a few years to take into account the established ways that materials have been used, the initial layout of chemical methods, the risky houses of merchandise, the power intake and different parameters worried in the manufacture of products (existence cycle, recycling). Green Chemistry turned into for many years an exceptionally summary concept with no fundamental concepts and definitions of practical applications. Now, the term green Chemistry has been described as “the invention, design and application of chemical products and procedures to reduce or to take away the use and era of unsafe materials for employees and consumers”. Some other component of the definition of green Chemistry is in the word “use and era of hazardous substances”. We need to suppose earlier if use of the product goes to be risky (workers, customers) or if it’s miles going to generate environmental pollutants via their use or after their realistic utility (as waste). Rather than focusing handiest on the ones unwanted materials that might be inadvertently produced in a system, green Chemistry also includes all materials which are part of the technique. Also, green Chemistry recognizes that there are tremendous results to using unsafe materials, starting from regulatory, handling and shipping, manufacturing of waste and legal responsibility troubles [4] [7].

The rapid development of new chemical technologies and the vast number of new chemical products in the last decades turned the attention of environmentalists to remedial actions for the negative impacts (monitoring environmental pollution, reduction of pollutants, recycling, etc). But the fact is that the most effective way to reduce the negative impacts is to design and innovation in the manufacturing processes, taking into account energy, materials, atom economy, use and generation of secondary materials which are dangerous and finally the life cycle of the products and their practical recycling into new materials [8].

Chemical substances range in length a lot that they may be “green”. Dichlorodifluoromethane, Cl₂CF₂, the aforementioned chlorofluorocarbon, isn’t actually green. This isn’t because of the truth that it’s miles toxic and it is one of the least poisonous synthetic compounds regarded—although due to the fact that it’s far an awful lot stronger and greater resistant within the surroundings and can deliberately damage stratospheric ozone. Compounds that replace it, hydrofluorocarbons and hydrochlorofluorocarbons, are a good deal less experienced due to the fact they do now not final lengthy when released into the environment or do not contain chlorine dangerous to ozone [2].

➢Preparation from renewable or readily available resources by environmentally friendly processes.

➢Low tendency to undergo sudden, violent, unpredictable reactions such as explosions that may cause damage, injure personnel, or cause release of chemicals and byproducts to the environment.

➢Nonflammable or poorly flammable.

➢Low toxicity.

➢Absence of toxic or environmentally dangerous constituents, particularly heavy metals.

➢Facile degradability, especially biodegradability, in the environment.

➢Low tendency to undergo bioaccumulation in food chains in the environment.

Green chemistry is commonly based totally on 12 concepts proposed by using Anastas and Warner. Today, these 12 fashions of inexperienced chemistry are taken into consideration to be the foundations contributing to sustainable development. The concepts encompass suggestions on the software of force to new chemical products, new syntheses and new techniques, as follows below [3] (Table 1 & Figure 2).

Traditionally, chemicals are comprised of petroleum raw substances. Even though chemical manufacturing for money is due to simplest 3% to 5% of oil consumption, oil sources account for extra than 98% of chemical raw substances. Chemists, chemical companies and consumers all see the benefits of the transition to sustainable raw substances. Chemists see the potential for brand new innovations and hazard losing nature’s potential to paintings on greater selective chemistry. Chemical corporations see custom uncooked substances, which constitute a financially strong deliver of uncooked materials [7].

Green Chemistry ensures minimum waste generation. Green chemistry is, in truth, a brand new manner of ensuring the protection of human fitness and the environment. It has lengthy been recognized that electricity savings and intake have a massive impact on the environment [8].

The simple business of green chemistry is to design chemical products and methods that reduce or eliminate harmful substances. In particular, the conversion of an old traditional product into a new “green” product, the scheme of the new product and the method are now always less cumbersome and relatively expensive. Lack of integration with what is considered safe [9].

➢It can be used as starting materials.

➢It can be used as green reagents.

➢It can be used as green chemical products in the making of alternative hydrides.

➢Green chemistry can be used in the manufacture of better drugs that is used to cure deadly diseases.

➢Green chemistry has a very wide application in agriculture sector. They can be used as biological control agents.

➢It can be used in atomic economy and homogeneous catalysis.

➢Green chemistry can be used in halide free synthesis of aromatic halides.

➢Chemists have developed new methods of producing polymers from renewable source such as biomass.

➢The manufacturing of computer chips requires large amount of chemicals, water and energy. The mass of the chemicals and fossil fuels which is used for making a computer chip is 630 times the weight of the chip.

Oxidation-reduction reactions include electron recovery and loss and an alternative to the oxidation state of the molecules involved [10] [11]. Oxidation is a way in which the tremendous thing of a carbon atom binds extra electronegative factors to specific oxygen [12].

The enhancements which might be made in the effect at the surroundings because of the pharmaceutical and agricultural chemical industry have lagged in the back of and stalled the increase which is taken into consideration within the manufacturing of bulk commodity chemical compounds. Exceptional chemicals are organized via using reactions concerning many steps which make use of stoichiometric reagents and chiral auxiliaries. The atom financial machine of manufacturing these is terrible. The various biologically lively compounds which can be from the pharmaceutical and agricultural industries are noticeably oxygenated and are product of the a few type of the oxidation response. So there may be more demand for the greater selective oxidation catalysts [4].

Reduction is a process in which a carbon atom gains bonds to less electronegative elements, especially hydrogen. Reducing Agents: Reducing agents add the equivalent of two hydrogen atoms to a molecule [10]. Most common reducing reagents are:

1) Lithium aluminum hydride (LiAlH4), a very strong reducing agent.

2) Nascent (atomic) hydrogen.

3) Hydrogen without or with a suitable catalyst e.g. a Lindlarcatalyst.

4) Sodium amalgam (Na (Hg)).

Reduction methods lessen the effect of chemical compounds on human fitness and on the surroundings by way of utilizing environment pleasant tactics and the reactions techniques.

The choice of the solvents and chemical substances which might be utilized for dissolve many of resources in the answer are of very plenty significance in green chemistry. They form a most critical source of waste in the business chemical production however careful willpower can be used to growth reaction expenses and lowering of reaction temperatures [4].

Green chemistry may be done by using environmentally eco-friend technologies—a few old and a few new. While green Chemistry has prolonged been identified as a critical breakthrough in the manner we workout chemistry and is crucial of sustainable improvement, its software is fragmented and represents best a small part of real chemistry [13] [14].

Green technology is where science is environmentally friendly and is created and used in a way that protects plant wealth and the environment. Green technological know-how is ecological technological know-how and easy technology. Green technological know-how is the subject of new, revolutionary ways of making changes in everyday life. This seamless technology is currently in its early stages of development [15].

Green design makes people think about the relationship between the development of modern science and technology and the destruction of the ecological environment, and has become a hot topic in the field of industrial technology [5]. In industry, people’s awareness of environmental protection is growing and chemical product design is changing from a traditional desire to only increase economic interests to achieve environmental goals, standards and a comprehensive assessment of economic factors, social development and the ecological environment (Figure 5).

The whole process of chemical production, i.e. the transformation of raw materials

into products, is a whole stage from the ideological level to the physical and technical means. The first form of a product is created by design, but no matter how good the design is, it must also be made through real production links before the products gain practical value, and the production process is also a necessary stage. Experience the green phase of chemical technology development. At this stage, the most important thing is to make sure that the raw materials are used harmless, specifically, it can be achieved in the following aspects: 1) ensuring the purity of the raw material. Raw materials must be fully utilized, because in some areas of technology, the raw materials themselves have higher requirements for purity, conversion ratio, etc., so inadequate application leads to unnecessary waste of resources. 2) Use as many sustainable raw materials as possible. The material consists mainly of paper, steel and other raw materials [7]. 3) If possible, use alternative raw materials. Some chemical manufacturing processes can cause contamination and release of toxic material. Therefore, some non-polluting alternative raw materials should be selected.

Consumption plays an important role in human economic life and is directly linked to all aspects of social life and also has a major impact on the ecological environment. The impact of consumption on the environment is shown in Figure 6.

From the point of view of chemical products, the importance of green consumption can be summarized as follows: 1) the consumption process effectively reduces resource losses; 2) products used as green, chemical and chemical products; 3) the consequences of consumption are not harmful to them or to the environment and are characterized by lasting effects. Factors that affect the consumption of chemical products come from all aspects, first people need to have an idea of green consumption; the second aspect concerns differences in income levels.

The sourcing of uncooked materials, the production and definitive use of chemical

products can cause a few pollution of the surroundings and likely waste water, waste residues and different wastes. The recycling of these waste products is the closing step inside the life cycle of a chemical product, and if this connection is lost, the waste that is launched directly into the natural surroundings will motive not best pollutants, but additionally waste of assets. A variety of waste is useless in itself; it is able to also be just “bad resources”. Recyclable materials may be recycled with appropriate recycling and recycling technologies, and this is also a critical a part of green chemistry.